Android 天气APP(二十九)壁纸设置、图片查看、图片保存

时间:2022-07-25
本文章向大家介绍Android 天气APP(二十九)壁纸设置、图片查看、图片保存,主要内容包括其使用实例、应用技巧、基本知识点总结和需要注意事项,具有一定的参考价值,需要的朋友可以参考一下。

效果图

开发流程

一、前情提要

  最近收到一些用户的反馈,内容是背景更换这个功能用的不是很舒服,至于为什么不舒服,说不上来。之前我是奔着功能实现去做的,所以很多的细节并没有想的太多,思虑再三之后打算重新做一个更换背景的功能。

二、正式开发

从上面的效果图来看,一步一步分析,第一个就是点击主页面右上角的加号会出出现一个弹窗,这里我把原来的背景管理给隐藏掉了,新增了一个壁纸管理的TextView,所以先打开window_add.xml,在里面新增如下代码:

		<TextView
            android:id="@+id/tv_wallpaper"
            android:gravity="center"
            android:layout_width="@dimen/dp_140"
            android:layout_height="@dimen/dp_48"
            android:text="壁纸管理"
            android:foreground="@drawable/bg_white"
            android:textColor="@color/black"
            android:textSize="@dimen/sp_16"/>

然后回到MainActivity,在showAddWindow方法中,初始化刚才的TextView

然后给一个点击事件

		wallpaper.setOnClickListener(view -> {//壁纸管理
            startActivity(new Intent(context, WallPaperActivity.class));
            mPopupWindow.dismiss();
        });

你会发现没有这个WallPaperActivity,所以在app下的ui包中新增WallPaperActivity,它的布局文件为activity_wall_paper.xml,现在我们可以通过主页面进入到这个壁纸管理页面了,首先看看这个页面的效果是怎么样的。

整理效果就是页面上滑动时顶部标题、和底部的浮动按钮上滑隐藏,下滑则显示。这里其实我分了两部分做,第一步是上面的标题,这个可以通过布局来解决,那就是协调布局。 现在该activity_wall_paper.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:fitsSystemWindows="true"
    tools:context=".ui.WallPaperActivity">

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:elevation="0dp"
        android:theme="@style/ThemeOverlay.AppCompat.Light">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:contentInsetLeft="@dimen/dp_16"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_scrollFlags="scroll|enterAlways"
            app:navigationIcon="@mipmap/icon_return"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light">
			<!--标题-->
            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="壁纸"
                android:textColor="@color/black"
                android:textSize="@dimen/sp_18" />

        </androidx.appcompat.widget.Toolbar>
    </com.google.android.material.appbar.AppBarLayout>

    <!--壁纸列表-->
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/rv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:overScrollMode="never"
        android:padding="@dimen/dp_5"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
    
</androidx.coordinatorlayout.widget.CoordinatorLayout>

现在呢?我们上滑这个RecyclerView的时候,顶部的Toolbar就会向上隐藏,下滑就会马上显示出来,不过因为我们的RecyclerView里面并没有数据,如果要填充数据进去。

1. 列表数据填充

这里我是从网络上找到的一个免费的壁纸接口,这里也分享给大家,地址如下:

http://service.picasso.adesk.com/v1/vertical/vertical?limit=30&skip=180&adult=false&first=0&order=hot

可以直接在浏览器请求这个地址,然后拿到返回的Json数据生成一个实体bean。下面在app的bean包下新建一个WallPaperResponse.java 里面的代码如下:

package com.llw.goodweather.bean;

import java.util.List;

/**
 * 壁纸列表返回实体
 *
 * @author llw
 */
public class WallPaperResponse {

    /**
     * msg : success
     * res : {"vertical":[{"preview":"http://img5.adesk.com/5e26fed9e7bce75ebd2c449d","thumb":"http://img5.adesk.com/5e26fed9e7bce75ebd2c449d?imageMogr2/thumbnail/!350x540r/gravity/Center/crop/350x540","img":"http://img5.adesk.com/5e26fed9e7bce75ebd2c449d?imageMogr2/thumbnail/!720x1280r/gravity/Center/crop/720x1280","views":0,"cid":["4ef0a35c0569795756000000"],"rule":"?imageMogr2/thumbnail/!$<Width>x$<Height>r/gravity/Center/crop/$<Width>x$<Height>","ncos":6,"rank":51169,"source_type":"vertical","tag":[],"url":[],"wp":"http://img5.adesk.com/5e26fed9e7bce75ebd2c449d","xr":false,"cr":false,"favs":830,"atime":1.580187618E9,"id":"5e26fed9e7bce75ebd2c449d","store":"qiniu","desc":""},{"preview":"http://img5.adesk.com/5ed61fd2e7bce75e7ef4c0ed","thumb":"http://img5.adesk.com/5ed61fd2e7bce75e7ef4c0ed?imageMogr2/thumbnail/!350x540r/gravity/Center/crop/350x540","img":"http://img5.adesk.com/5ed61fd2e7bce75e7ef4c0ed?imageMogr2/thumbnail/!720x1280r/gravity/Center/crop/720x1280","views":0,"cid":["4fb479f75ba1c65561000027"],"rule":"?imageMogr2/thumbnail/!$<Width>x$<Height>r/gravity/Center/crop/$<Width>x$<Height>","ncos":0,"rank":7860,"source_type":"vertical","tag":[],"url":[],"wp":"http://img5.adesk.com/5ed61fd2e7bce75e7ef4c0ed","xr":false,"cr":false,"favs":71,"atime":1.591337416E9,"id":"5ed61fd2e7bce75e7ef4c0ed","store":"qiniu","desc":""}]}
     * code : 0
     */

    private String msg;
    private ResBean res;
    private int code;

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public ResBean getRes() {
        return res;
    }

    public void setRes(ResBean res) {
        this.res = res;
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public static class ResBean {
        private List<VerticalBean> vertical;

        public List<VerticalBean> getVertical() {
            return vertical;
        }

        public void setVertical(List<VerticalBean> vertical) {
            this.vertical = vertical;
        }

        public static class VerticalBean {
            /**
             * preview : http://img5.adesk.com/5e26fed9e7bce75ebd2c449d
             * thumb : http://img5.adesk.com/5e26fed9e7bce75ebd2c449d?imageMogr2/thumbnail/!350x540r/gravity/Center/crop/350x540
             * img : http://img5.adesk.com/5e26fed9e7bce75ebd2c449d?imageMogr2/thumbnail/!720x1280r/gravity/Center/crop/720x1280
             * views : 0
             * cid : ["4ef0a35c0569795756000000"]
             * rule : ?imageMogr2/thumbnail/!$<Width>x$<Height>r/gravity/Center/crop/$<Width>x$<Height>
             * ncos : 6
             * rank : 51169
             * source_type : vertical
             * tag : []
             * url : []
             * wp : http://img5.adesk.com/5e26fed9e7bce75ebd2c449d
             * xr : false
             * cr : false
             * favs : 830
             * atime : 1.580187618E9
             * id : 5e26fed9e7bce75ebd2c449d
             * store : qiniu
             * desc :
             */

            private String preview;
            private String thumb;
            private String img;
            private int views;
            private String rule;
            private int ncos;
            private int rank;
            private String source_type;
            private String wp;
            private boolean xr;
            private boolean cr;
            private int favs;
            private double atime;
            private String id;
            private String store;
            private String desc;
            private List<String> cid;
            private List<?> tag;
            private List<?> url;

            public String getPreview() {
                return preview;
            }

            public void setPreview(String preview) {
                this.preview = preview;
            }

            public String getThumb() {
                return thumb;
            }

            public void setThumb(String thumb) {
                this.thumb = thumb;
            }

            public String getImg() {
                return img;
            }

            public void setImg(String img) {
                this.img = img;
            }

            public int getViews() {
                return views;
            }

            public void setViews(int views) {
                this.views = views;
            }

            public String getRule() {
                return rule;
            }

            public void setRule(String rule) {
                this.rule = rule;
            }

            public int getNcos() {
                return ncos;
            }

            public void setNcos(int ncos) {
                this.ncos = ncos;
            }

            public int getRank() {
                return rank;
            }

            public void setRank(int rank) {
                this.rank = rank;
            }

            public String getSource_type() {
                return source_type;
            }

            public void setSource_type(String source_type) {
                this.source_type = source_type;
            }

            public String getWp() {
                return wp;
            }

            public void setWp(String wp) {
                this.wp = wp;
            }

            public boolean isXr() {
                return xr;
            }

            public void setXr(boolean xr) {
                this.xr = xr;
            }

            public boolean isCr() {
                return cr;
            }

            public void setCr(boolean cr) {
                this.cr = cr;
            }

            public int getFavs() {
                return favs;
            }

            public void setFavs(int favs) {
                this.favs = favs;
            }

            public double getAtime() {
                return atime;
            }

            public void setAtime(double atime) {
                this.atime = atime;
            }

            public String getId() {
                return id;
            }

            public void setId(String id) {
                this.id = id;
            }

            public String getStore() {
                return store;
            }

            public void setStore(String store) {
                this.store = store;
            }

            public String getDesc() {
                return desc;
            }

            public void setDesc(String desc) {
                this.desc = desc;
            }

            public List<String> getCid() {
                return cid;
            }

            public void setCid(List<String> cid) {
                this.cid = cid;
            }

            public List<?> getTag() {
                return tag;
            }

            public void setTag(List<?> tag) {
                this.tag = tag;
            }

            public List<?> getUrl() {
                return url;
            }

            public void setUrl(List<?> url) {
                this.url = url;
            }
        }
    }
}

实体bean有了,下面就是拆分这个请求地址了。找到在mvplibrary下找到ServiceGenerator.java。 新增如下

然后再打开ApiService.java,里面新增一个接口

	/**
     * 手机壁纸API
     *
     * @return WallPaperResponse 网络壁纸数据返回
     */
    @GET("/v1/vertical/vertical?limit=30&skip=180&adult=false&first=0&order=hot")
    Call<WallPaperResponse> getWallPaper();

下面就是订阅器了,在app中的contract包下新建一个WallPaperContract.java,里面的代码如下:

package com.llw.goodweather.contract;

import com.llw.goodweather.api.ApiService;
import com.llw.goodweather.bean.BiYingImgResponse;
import com.llw.goodweather.bean.WallPaperResponse;
import com.llw.mvplibrary.base.BasePresenter;
import com.llw.mvplibrary.base.BaseView;
import com.llw.mvplibrary.bean.AppVersion;
import com.llw.mvplibrary.bean.WallPaper;
import com.llw.mvplibrary.net.NetCallBack;
import com.llw.mvplibrary.net.ServiceGenerator;

import retrofit2.Call;
import retrofit2.Response;

/**
 * 壁纸订阅器
 *
 * @author llw
 */
public class WallPaperContract {

    public static class WallPaperPresenter extends BasePresenter<IWallPaperView> {


        /**
         * 获取必应  每日一图
         */
        public void biying() {
            ApiService service = ServiceGenerator.createService(ApiService.class, 1);
            service.biying().enqueue(new NetCallBack<BiYingImgResponse>() {
                @Override
                public void onSuccess(Call<BiYingImgResponse> call, Response<BiYingImgResponse> response) {
                    if (getView() != null) {
                        getView().getBiYingResult(response);
                    }
                }

                @Override
                public void onFailed() {
                    if (getView() != null) {
                        getView().getDataFailed();
                    }
                }
            });
        }


        /**
         * 获取壁纸数据
         */
        public void getWallPaper() {
            // 6 表示访问网络壁纸接口
            ApiService service = ServiceGenerator.createService(ApiService.class, 6);
            service.getWallPaper().enqueue(new NetCallBack<WallPaperResponse>() {
                @Override
                public void onSuccess(Call<WallPaperResponse> call, Response<WallPaperResponse> response) {
                    if (getView() != null) {
                        getView().getWallPaperResult(response);
                    }
                }

                @Override
                public void onFailed() {
                    if (getView() != null) {
                        getView().getDataFailed();
                    }
                }
            });
        }
    }

    public interface IWallPaperView extends BaseView {

        /**
         * 获取必应每日一图返回
         * @param response BiYingImgResponse
         */
        void getBiYingResult(Response<BiYingImgResponse> response);

        /**
         * 壁纸数据返回
         * @param response WallPaperResponse
         */
        void getWallPaperResult(Response<WallPaperResponse> response);

        /**
         * 错误返回
         */
        void getDataFailed();


    }
}

订阅器也有了,现在回到WallPaperActivity ,继承MvpActivity,传入订阅器,然后实现里面的接口,代码如下:

package com.llw.goodweather.ui;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;
import androidx.recyclerview.widget.RecyclerView;

import com.llw.goodweather.R;
import com.llw.goodweather.contract.WallPaperContract;
import com.llw.mvplibrary.bean.WallPaper;
import com.llw.mvplibrary.mvp.MvpActivity;

import butterknife.BindView;
import butterknife.ButterKnife;
import retrofit2.Response;

/**
 * 壁纸管理
 *
 * @author llw
 */
public class WallPaperActivity extends MvpActivity<WallPaperContract.WallPaperPresenter> implements WallPaperContract.IWallPaperView {

    @Override
    public void initData(Bundle savedInstanceState) {

    }

    @Override
    public int getLayoutId() {
        return R.layout.activity_wall_paper;
    }

    @Override
    protected WallPaperContract.WallPaperPresenter createPresent() {
        return new WallPaperContract.WallPaperPresenter();
    }

    @Override
    public void getBiYingResult(Response<BiYingImgResponse> response) {
        
    }

    @Override
    public void getWallPaperResult(Response<WallPaper> response) {

    }

    @Override
    public void getDataFailed() {

    }


}

现在可以先不管这个Activity了,列表既然是显示壁纸,那么就需要一个item的布局,下面在app下的layout下面创建一个item_wallpaper_list.xml,布局代码如下:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:id="@+id/item_wallpaper"
    android:layout_height="wrap_content"
    android:layout_margin="@dimen/dp_5"
    android:orientation="vertical">

    <com.google.android.material.imageview.ShapeableImageView
        android:id="@+id/iv_wallpaper"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:scaleType="centerCrop"
        app:shapeAppearanceOverlay="@style/roundedCornerStyle" />
</RelativeLayout>

你可能没有用过ShapeableImageView,没关系,首先在mvplibrary中的build.gradle中的dependencies闭包下新增一个依赖库

api 'com.google.android.material:material:1.2.0'//更强

我之前的是1.1.0,那么你可以改成1.2.0。然后同步到你的项目中。你就可以是material专属的UI控件了,你可能会问为什么要用这个控件,普通的ImageView不行吗?因为普通的ImageView没有圆角啊,说道圆角图片我相信你不会陌生,你可能想到自定义ImageView来实现、或者使用第三方库来实现,但是ShapeableImageView里面就自带了圆角的样式给你,惊不惊喜意不意外?好了,废话不多少了,你的布局中应该还有报错的地方才对。因为你少了一个roundedCornerStyle的样式。在mvplibrary下的styles.xml中,新增一个样式就可以了。

	<!-- 圆角图片 -->
    <style name="roundedCornerStyle">
        <item name="cornerFamily">rounded</item>
        <item name="cornerSize">@dimen/dp_16</item>
    </style>

可能你还注意到我这个item的高度是wrap_content,所以你看不到高度,那么为什么这样做呢?因为我要使用瀑布流,哪种错落感,会给用户不一样的体验,因为不设置高度,是因为需要动态设置ImageView的高度,来实现这个错落感。OK,下面该写这个Adapter了。在app的adapter包下新建一个WallPaperAdapter.java,相信这个代码你能看得懂。

package com.llw.goodweather.adapter;

import android.util.Log;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;

import androidx.annotation.Nullable;

import com.baidu.panosdk.plugin.indoor.util.ScreenUtils;
import com.bumptech.glide.Glide;
import com.chad.library.adapter.base.BaseQuickAdapter;
import com.chad.library.adapter.base.BaseViewHolder;
import com.google.android.material.imageview.ShapeableImageView;
import com.llw.goodweather.R;
import com.llw.goodweather.bean.WallPaperResponse;

import java.util.List;

/**
 * 壁纸列表适配器
 *
 * @author llw
 */
public class WallPaperAdapter extends BaseQuickAdapter<WallPaperResponse.ResBean.VerticalBean, BaseViewHolder> {

    //定义一个item的高度列表
    List<Integer> mHeightList;
    /**
     * 头部广告
     */
    private String Top = "top";
    /**
     * 底部广告
     */
    private String Bottom = "bottom";

    public WallPaperAdapter(int layoutResId, @Nullable List<WallPaperResponse.ResBean.VerticalBean> data, List<Integer> heightList) {
        super(layoutResId, data);
        this.mHeightList = heightList;

    }

    @Override
    protected void convert(BaseViewHolder helper, WallPaperResponse.ResBean.VerticalBean item) {
        ShapeableImageView imageView = helper.getView(R.id.iv_wallpaper);

        //获取imageView的LayoutParams
        RelativeLayout.LayoutParams layoutParams = (RelativeLayout.LayoutParams) imageView.getLayoutParams();
        layoutParams.height = dip2px(mHeightList.get(helper.getAdapterPosition()));
        //重新设置imageView的高度
        imageView.setLayoutParams(layoutParams);

        if (Top.equals(item.getDesc()) || Bottom.equals(item.getDesc())) {
            imageView.setImageResource(R.mipmap.icon_logo);
        } else {
            Glide.with(mContext).load(item.getImg()).into(imageView);
        }

        helper.addOnClickListener(R.id.item_wallpaper);
    }


    // dp 转成 px
    private int dip2px(float dpVale) {
        final float scale = mContext.getResources().getDisplayMetrics().density;
        return (int) (dpVale * scale + 0.5f);
    }


}

适配器也写完了,下面改渲染页面了,对不对。回到WallPaperActivity

	/**
     * 标题
     */
    @BindView(R.id.toolbar)
    Toolbar toolbar;
    /**
     * 数据列表
     */
    @BindView(R.id.rv)
    RecyclerView rv;
    /**
     * AppBarLayout布局
     */
    @BindView(R.id.appbar)
    AppBarLayout appbar;

先绑定页面的控件,然后创建列表和适配器的对象

	/**
     * 壁纸数据列表
     */
    private List<WallPaperResponse.ResBean.VerticalBean> mList = new ArrayList<>();
    /**
     * 壁纸数据适配器
     */
    private WallPaperAdapter mAdapter;
    /**
     * item高度列表
     */
    private List<Integer> heightList = new ArrayList<>();

    /**
     * 壁纸数量
     */
    private static final int WALLPAPER_NUM = 30;
    /**
     * 头部和底部的item数据
     */
    private WallPaperResponse.ResBean.VerticalBean topBean, bottomBean;
    /**
     * 必应的每日壁纸
     */
    private String biyingUrl = null;

新增一个初始化列表数据的方法。

/**
     * 初始化列表数据
     */
    private void initWallPaperList() {

        heightList.add(100);
        for (int i = 0; i < WALLPAPER_NUM; i++) {
            heightList.add(300);
        }
        heightList.add(100);

        mAdapter = new WallPaperAdapter(R.layout.item_wallpaper_list, mList, heightList);
        //瀑布流
        StaggeredGridLayoutManager manager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
        //设置布局管理
        rv.setLayoutManager(manager);
        //设置数据适配器
        rv.setAdapter(mAdapter);
        //请求数据
        mPresent.getWallPaper();
        //获取必应壁纸
        mPresent.biying();

        mAdapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {
            @Override
            public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
               

            }
        });


    }

下面就该来处理返回的数据了。

	/**
     * 必应壁纸数据返回
     *
     * @param response BiYingImgResponse
     */
    @Override
    public void getBiYingResult(Response<BiYingImgResponse> response) {
        if (response.body().getImages() != null) {
            //得到的图片地址是没有前缀的,所以加上前缀否则显示不出来
            biyingUrl = "http://cn.bing.com" + response.body().getImages().get(0).getUrl();
            Log.d("type-->", biyingUrl);
        } else {
            ToastUtils.showShortToast(context, "未获取到必应的图片");
        }
    }


    /**
     * 网络壁纸数据返回
     *
     * @param response WallPaperResponse
     */
    @Override
    public void getWallPaperResult(Response<WallPaperResponse> response) {
        if (response.body().getMsg().equals(Constant.SUCCESS)) {

            List<WallPaperResponse.ResBean.VerticalBean> data = response.body().getRes().getVertical();

            //创建头部和底部的两个广告item的假数据
            topBean = new WallPaperResponse.ResBean.VerticalBean();
            topBean.setDesc("top");
            topBean.setImg("");
            bottomBean = new WallPaperResponse.ResBean.VerticalBean();
            bottomBean.setDesc("bottom");
            bottomBean.setImg("");

            //数据填充
            if (data != null && data.size() > 0) {
                mList.clear();
                //添加头部
                mList.add(topBean);
                //添加主要数据
                for (int i = 0; i < data.size(); i++) {
                    mList.add(data.get(i));
                }
                //添加尾部
                mList.add(bottomBean);
                Log.d("list-->", new Gson().toJson(mList));

                //根据数据数量来刷新列表
                mAdapter.notifyItemInserted(mList.size());
                //删除数据库中的数据
                LitePal.deleteAll(WallPaper.class);
                for (int i = 0; i < mList.size(); i++) {
                    WallPaper wallPaper = new WallPaper();
                    wallPaper.setImgUrl(mList.get(i).getImg());
                    wallPaper.save();
                }
                dismissLoadingDialog();
            } else {
                ToastUtils.showShortToast(context, "壁纸数据为空");
                dismissLoadingDialog();
            }
        } else {
            dismissLoadingDialog();
            ToastUtils.showShortToast(context, "未获取到壁纸数据");
        }
    }

    @Override
    public void getDataFailed() {
        dismissLoadingDialog();
        ToastUtils.showShortToast(context, "请求超时");
    }

Constant中增加一个

	/**
     * 成功
     */
    public static final String SUCCESS = "success";

你会发现网络壁纸的返回处理有些麻烦。不过注释都有了,应该看得懂。下面在mvplibrary中创建WallPaper.java

里面的代码很简单:

package com.llw.mvplibrary.bean;

import org.litepal.crud.LitePalSupport;

import java.util.List;

/**
 * 壁纸表
 *
 * @author llw
 */
public class WallPaper extends LitePalSupport {

    private String ImgUrl;

    public String getImgUrl() {
        return ImgUrl;
    }

    public void setImgUrl(String imgUrl) {
        ImgUrl = imgUrl;
    }
}

然后改动assets下面的litepal.xml文件。

然后在WallPaperActivity的initData调用相关的方法。

	@Override
    public void initData(Bundle savedInstanceState) {
        //加载弹窗
        showLoadingDialog();
        //高亮状态栏
        StatusBarUtil.StatusBarLightMode(this);
        //左上角的返回
        Back(toolbar);
        initWallPaperList();

    }

下面请求就会有这个数据了,而且你上滑动就会有顶部的标题上隐藏的效果。

2. 浮动按钮的交互

下面加一个浮动按钮。在activity_wall_paper.xml中新增加一个

	<!--浮动按钮-->
    <com.google.android.material.floatingactionbutton.FloatingActionButton
        android:id="@+id/fab_setting"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="end|bottom"
        android:layout_margin="@dimen/dp_20"
        android:clickable="true"
        android:src="@mipmap/icon_setting"
        app:backgroundTint="@color/white"
        app:backgroundTintMode="screen"
        app:borderWidth="@dimen/dp_0"
        app:hoveredFocusedTranslationZ="@dimen/dp_18"
        app:pressedTranslationZ="@dimen/dp_18"
        app:rippleColor="@color/blue_one" />

icon_setting的图标

然后在WallPaperActivity中新增

	/**
     * 底部浮动按钮
     */
    @BindView(R.id.fab_setting)
    FloatingActionButton fabSetting;

然后在initWallPaperList方法中新增如下代码:

		//滑动监听
        rv.addOnScrollListener(new RecyclerView.OnScrollListener() {
            @Override
            public void onScrolled(@NonNull RecyclerView recyclerView, int dx, int dy) {
                super.onScrolled(recyclerView, dx, dy);
                if (dy <= 0) {
                    fabSetting.show();
                } else {//上滑
                    fabSetting.hide();
                }
            }
        });

通过滑动RecyclerView对浮动按钮进行控制。当然浮动按钮要是光是显示和隐藏自然远远不行,浮动按钮点击之后要怎么样呢? 要出现一个底部弹窗,供你选择哪种方式的壁纸。 下面在app的layout下新建一个dialog_bottom_wallpaper_setting.xml,布局代码如下:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/white"
    android:orientation="vertical">
    
    <!--壁纸列表-->
    <LinearLayout
        android:id="@+id/lay_wallpaper_list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:foreground="?android:attr/selectableItemBackground"
        android:gravity="center"
        android:orientation="horizontal"
        android:padding="@dimen/dp_16">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="壁纸列表"
            android:textColor="@color/black_4"
            android:textSize="@dimen/sp_14" />

        <ImageView
            android:id="@+id/iv_wallpaper_list"
            android:layout_width="@dimen/dp_24"
            android:layout_height="@dimen/dp_24"
            android:src="@mipmap/icon_selected"
            android:visibility="invisible" />
    </LinearLayout>

    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:layout_marginLeft="@dimen/dp_16"
        android:layout_marginRight="@dimen/dp_16"
        android:background="@color/gray_white_2" />

    <!--每日一图-->
    <LinearLayout
        android:id="@+id/lay_everyday_wallpaper"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:foreground="?android:attr/selectableItemBackground"
        android:gravity="center"
        android:orientation="horizontal"
        android:padding="@dimen/dp_16">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="每日一图"
            android:textColor="@color/black_4"
            android:textSize="@dimen/sp_14" />

        <ImageView
            android:id="@+id/iv_everyday_wallpaper"
            android:layout_width="@dimen/dp_24"
            android:layout_height="@dimen/dp_24"
            android:src="@mipmap/icon_selected"
            android:visibility="invisible" />
    </LinearLayout>

    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:layout_marginLeft="@dimen/dp_16"
        android:layout_marginRight="@dimen/dp_16"
        android:background="@color/gray_white_2" />

    <!--手动上传-->
    <LinearLayout
        android:id="@+id/lay_upload_wallpaper"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:foreground="?android:attr/selectableItemBackground"
        android:gravity="center"
        android:orientation="horizontal"
        android:padding="@dimen/dp_16">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="手动上传"
            android:textColor="@color/black_4"
            android:textSize="@dimen/sp_14" />

        <ImageView
            android:id="@+id/iv_upload_wallpaper"
            android:layout_width="@dimen/dp_24"
            android:layout_height="@dimen/dp_24"
            android:src="@mipmap/icon_selected"
            android:visibility="invisible" />
    </LinearLayout>

    <View
        android:layout_width="match_parent"
        android:layout_height="1dp"
        android:layout_marginLeft="@dimen/dp_16"
        android:layout_marginRight="@dimen/dp_16"
        android:background="@color/gray_white_2" />

    <!--默认壁纸-->
    <LinearLayout
        android:id="@+id/lay_default_wallpaper"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:foreground="?android:attr/selectableItemBackground"
        android:gravity="center"
        android:orientation="horizontal"
        android:padding="@dimen/dp_16">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="默认壁纸"
            android:textColor="@color/black_4"
            android:textSize="@dimen/sp_14" />

        <ImageView
            android:id="@+id/iv_default_wallpaper"
            android:layout_width="@dimen/dp_24"
            android:layout_height="@dimen/dp_24"
            android:src="@mipmap/icon_selected"
            android:visibility="invisible" />
    </LinearLayout>

</LinearLayout>

预览如下:

icon_selected图标:

下面来写这个弹窗。 回到WallPaperActivity。 初始化这个弹窗,注意这个导包是我自定义的,不是系统自带的。

import com.llw.mvplibrary.view.dialog.AlertDialog;
	/**
     * 底部弹窗
     */
    AlertDialog bottomSettingDialog = null;

然后写一个方法用来显示弹窗以及里面的一些业务逻辑的处理。

	/**
     * 壁纸底部弹窗弹窗
     */
    private void showSettingDialog(int type) {

        AlertDialog.Builder builder = new AlertDialog.Builder(context)
                .addDefaultAnimation()//默认弹窗动画
                .setCancelable(true)
                .fromBottom(true)
                //载入布局文件
                .setContentView(R.layout.dialog_bottom_wallpaper_setting)
                //设置弹窗宽高
                .setWidthAndHeight(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT)
                //壁纸列表
                .setOnClickListener(R.id.lay_wallpaper_list, v -> {

                    Intent intent = new Intent(context, ImageActivity.class);
                    intent.putExtra("position", 0);
                    startActivity(intent);

                    bottomSettingDialog.dismiss();
                    //每日一图
                }).setOnClickListener(R.id.lay_everyday_wallpaper, v -> {
                    ToastUtils.showShortToast(context, "使用每日一图");
                    SPUtils.putString(Constant.WALLPAPER_URL, biyingUrl, context);
                    //壁纸列表
                    SPUtils.putInt(Constant.WALLPAPER_TYPE, 2, context);
                    bottomSettingDialog.dismiss();
                    //手动上传
                }).setOnClickListener(R.id.lay_upload_wallpaper, v -> {
                    startActivityForResult(CameraUtils.getSelectPhotoIntent(), SELECT_PHOTO);
                    ToastUtils.showShortToast(context, "请选择图片");
                    bottomSettingDialog.dismiss();
                    //默认壁纸
                }).setOnClickListener(R.id.lay_default_wallpaper, v -> {
                    ToastUtils.showShortToast(context, "使用默认壁纸");
                    SPUtils.putInt(Constant.WALLPAPER_TYPE, 4, context);//使用默认壁纸
                    SPUtils.putString(Constant.WALLPAPER_URL, null, context);
                    bottomSettingDialog.dismiss();
                });


        bottomSettingDialog = builder.create();

        ImageView iv_wallpaper_list = (ImageView) bottomSettingDialog.getView(R.id.iv_wallpaper_list);
        ImageView iv_everyday_wallpaper = (ImageView) bottomSettingDialog.getView(R.id.iv_everyday_wallpaper);
        ImageView iv_upload_wallpaper = (ImageView) bottomSettingDialog.getView(R.id.iv_upload_wallpaper);
        ImageView iv_default_wallpaper = (ImageView) bottomSettingDialog.getView(R.id.iv_default_wallpaper);
        switch (type) {
            //壁纸列表
            case 1:
                iv_wallpaper_list.setVisibility(View.VISIBLE);
                break;
            //每日一图
            case 2:
                iv_everyday_wallpaper.setVisibility(View.VISIBLE);
                break;
            //手动上传
            case 3:
                iv_upload_wallpaper.setVisibility(View.VISIBLE);
                break;
            //默认壁纸
            case 4:
                iv_default_wallpaper.setVisibility(View.VISIBLE);
                break;
            default:
                iv_default_wallpaper.setVisibility(View.GONE);
                break;
        }

        bottomSettingDialog.show();

        //弹窗关闭监听
        bottomSettingDialog.setOnDismissListener(new DialogInterface.OnDismissListener() {
            @Override
            public void onDismiss(DialogInterface dialog) {
                fabSetting.show();
            }
        });
    }

可以看到通过一个type来控制当前的壁纸属于那种模式,然后在弹窗关闭的时候显示浮动按钮,我在Constant中定义了两个变量,一个用于保存壁纸的状态,一个用于保存壁纸的地址值。

	 /**
     * 壁纸地址
     */
    public static final String WALLPAPER_URL = "wallpaperUrl";
    /**
     * 壁纸类型  1  壁纸列表  2  每日一图  3  手动上传  4  默认壁纸
     */
    public static final String WALLPAPER_TYPE = "wallpaperType";

里面用到过一个工具类CameraUtils,代码如下:

package com.llw.goodweather.utils;

import android.annotation.TargetApi;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.util.Log;
import android.widget.ImageView;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;

/**
 * 相机、相册工具类
 *
 * @author llw
 */
public class CameraUtils {
    public static Intent getTakePhotoIntent(Context context, File outputImagepath) {
        //获取系統版本
        int currentapiVersion = Build.VERSION.SDK_INT;
        // 激活相机
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        // 判断存储卡是否可以用,可用进行存储
        if (hasSdcard()) {
            if (currentapiVersion < 24) {
                // 从文件中创建uri
                Uri uri = Uri.fromFile(outputImagepath);
                intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
            } else {
                //兼容android7.0 使用共享文件的形式
                ContentValues contentValues = new ContentValues(1);
                contentValues.put(MediaStore.Images.Media.DATA, outputImagepath.getAbsolutePath());
                Uri uri = context.getApplicationContext().getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues);
                intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
            }
        }
        return intent;
    }

    public static Intent getSelectPhotoIntent() {
        Intent intent = new Intent("android.intent.action.GET_CONTENT");
        intent.setType("image/*");
        return intent;
    }

    /*
     * 判断sdcard是否被挂载
     */
    public static boolean hasSdcard() {
        return Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED);
    }

    /**
     * 4.4及以上系统处理图片的方法
     */
    @TargetApi(Build.VERSION_CODES.KITKAT)
    public static String getImgeOnKitKatPath(Intent data, Context context) {
        String imagePath = null;
        Uri uri = data.getData();
        Log.d("uri=intent.getData :", "" + uri);
        if (DocumentsContract.isDocumentUri(context, uri)) {
            String docId = DocumentsContract.getDocumentId(uri);        //数据表里指定的行
            Log.d("getDocumentId(uri) :", "" + docId);
            Log.d("uri.getAuthority() :", "" + uri.getAuthority());
            if ("com.android.providers.media.documents".equals(uri.getAuthority())) {
                String id = docId.split(":")[1];
                String selection = MediaStore.Images.Media._ID + "=" + id;
                imagePath = getImagePath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, selection, context);
            } else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())) {
                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(docId));
                imagePath = getImagePath(contentUri, null, context);
            }

        } else if ("content".equalsIgnoreCase(uri.getScheme())) {
            imagePath = getImagePath(uri, null, context);
        }
        return imagePath;
    }

    /**
     * 通过uri和selection来获取真实的图片路径,从相册获取图片时要用
     */
    public static String getImagePath(Uri uri, String selection, Context context) {
        String path = null;
        Cursor cursor = context.getContentResolver().query(uri, null, selection, null, null);
        if (cursor != null) {
            if (cursor.moveToFirst()) {
                path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
            }
            cursor.close();
        }
        return path;
    }

    //改变拍完照后图片方向不正的问题
    public static void ImgUpdateDirection(String filepath, Bitmap orc_bitmap, ImageView iv) {
        int digree = 0;//图片旋转的角度
        //根据图片的URI获取图片的绝对路径
        Log.i("tag", ">>>>>>>>>>>>>开始");
        //String filepath = ImgUriDoString.getRealFilePath(getApplicationContext(), uri);
        Log.i("tag", "》》》》》》》》》》》》》》》" + filepath);
        //根据图片的filepath获取到一个ExifInterface的对象
        ExifInterface exif = null;
        try {
            exif = new ExifInterface(filepath);
            Log.i("tag", "exif》》》》》》》》》》》》》》》" + exif);
            if (exif != null) {

                // 读取图片中相机方向信息
                int ori = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_UNDEFINED);

                // 计算旋转角度
                switch (ori) {
                    case ExifInterface.ORIENTATION_ROTATE_90:
                        digree = 90;
                        break;
                    case ExifInterface.ORIENTATION_ROTATE_180:
                        digree = 180;
                        break;
                    case ExifInterface.ORIENTATION_ROTATE_270:
                        digree = 270;
                        break;
                    default:
                        digree = 0;
                        break;

                }

            }
            //如果图片不为0
            if (digree != 0) {
                // 旋转图片
                Matrix m = new Matrix();
                m.postRotate(digree);
                orc_bitmap = Bitmap.createBitmap(orc_bitmap, 0, 0, orc_bitmap.getWidth(),
                        orc_bitmap.getHeight(), m, true);
            }
            if (orc_bitmap != null) {
                iv.setImageBitmap(orc_bitmap);
            }
        } catch (IOException e) {
            e.printStackTrace();
            exif = null;
        }
    }

    /**
     * 4.4以下系统处理图片的方法
     */
    public static String getImageBeforeKitKatPath(Intent data, Context context) {
        Uri uri = data.getData();
        String imagePath = getImagePath(uri, null, context);
        return imagePath;
    }

    //比例压缩
    public static Bitmap comp(Bitmap image) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        image.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        if (baos.toByteArray().length / 1024 > 5120) {//判断如果图片大于5M,进行压缩避免在生成图片(BitmapFactory.decodeStream)时溢出
            baos.reset();//重置baos即清空baos
            image.compress(Bitmap.CompressFormat.JPEG, 50, baos);//这里压缩50%,把压缩后的数据存放到baos中
        }
        ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());
        BitmapFactory.Options newOpts = new BitmapFactory.Options();
        //开始读入图片,此时把options.inJustDecodeBounds 设回true了
        newOpts.inJustDecodeBounds = true;
        Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, newOpts);
        newOpts.inJustDecodeBounds = false;
        int w = newOpts.outWidth;
        int h = newOpts.outHeight;
        //现在主流手机比较多是800*480分辨率,所以高和宽我们设置为
        float hh = 800f;//这里设置高度为800f
        float ww = 480f;//这里设置宽度为480f
        //缩放比。由于是固定比例缩放,只用高或者宽其中一个数据进行计算即可
        int be = 1;//be=1表示不缩放
        if (w > h && w > ww) {//如果宽度大的话根据宽度固定大小缩放
            be = (int) (newOpts.outWidth / ww);
        } else if (w < h && h > hh) {//如果高度高的话根据宽度固定大小缩放
            be = (int) (newOpts.outHeight / hh);
        }
        if (be <= 0)
            be = 1;
        newOpts.inSampleSize = be;//设置缩放比例
        newOpts.inPreferredConfig = Bitmap.Config.RGB_565;//降低图片从ARGB888到RGB565
        //重新读入图片,注意此时已经把options.inJustDecodeBounds 设回false了
        isBm = new ByteArrayInputStream(baos.toByteArray());
        bitmap = BitmapFactory.decodeStream(isBm, null, newOpts);
        return bitmap;//压缩好比例大小后再进行质量压缩
    }
}

因为第三个是手动上传,所以会打开你的本地相册,当你选择一个图片之后,需要拿到返回的数据。所以要重写onActivityResult,在这个方法里面获取到图片的路径,然后放到缓存里,这时候你的壁纸类型就是手动上传的壁纸了。

 	/**
     * Activity返回结果
     *
     * @param requestCode
     * @param resultCode
     * @param data
     */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        switch (requestCode) {
            //打开相册后返回
            case SELECT_PHOTO:
                if (resultCode == RESULT_OK) {
                    String imagePath = null;
                    //判断手机系统版本号
                    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT) {
                        //4.4及以上系统使用这个方法处理图片
                        imagePath = CameraUtils.getImgeOnKitKatPath(data, this);
                    } else {
                        imagePath = CameraUtils.getImageBeforeKitKatPath(data, this);
                    }
                    displayImage(imagePath);
                }
                Log.d("result-->", requestCode + "   " + resultCode + "   " + data.getData().toString());

                break;
            default:
                Log.d("result-->", requestCode + "   " + resultCode + "   " + data.getData().toString());
                break;
        }
    }

    /**
     * 从相册获取完图片(根据图片路径显示图片)
     */
    private void displayImage(String imagePath) {
        if (!TextUtils.isEmpty(imagePath)) {
            //将本地上传选中的图片地址放入缓存,当手动定义开关打开时,取出缓存中的图片地址,显示为背景
            SPUtils.putInt(Constant.WALLPAPER_TYPE, 3, context);
            SPUtils.putString(Constant.WALLPAPER_URL, imagePath, context);
            ToastUtils.showShortToast(context, "已更换为你选择的图片");
        } else {
            SPUtils.putInt(Constant.WALLPAPER_TYPE, 0, context);
            ToastUtils.showShortToast(context, "图片获取失败");
        }
    }

至于默认壁纸,只要壁纸类型改为4,然后清空缓存中壁纸地址就可以了。因为这个地址是MainActivity中用来显示背景的依据,没有了就会显示默认背景。 至于第二个每日一图,就是在点击的时候把通过结果返回的地址拼接之后,再放入缓存中。同样指定类型。当然最头痛的是这个壁纸列表,首先在当前页面我们已经可以看到这个壁纸列表数据了。那么我们可以通过点击item的时候跳转到查看该壁纸完整的页面。所以需要创建一个ImageActivity,在app的UI包下创建。 布局的代码如下:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white"
    tools:context=".ui.ImageActivity">
    
    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/vp"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

    <!--返回按钮-->
    <ImageView
        android:id="@+id/iv_back"
        android:layout_width="@dimen/dp_50"
        android:layout_height="@dimen/dp_50"
        android:layout_marginLeft="@dimen/dp_12"
        android:layout_marginTop="@dimen/dp_30"
        android:padding="@dimen/dp_8"
        android:background="@drawable/selector_bg_img"
        android:src="@mipmap/icon_image_return_white" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="@dimen/dp_12"
        android:gravity="center"
        android:orientation="horizontal">
        
        <!--设为壁纸-->
        <com.google.android.material.button.MaterialButton
            android:id="@+id/btn_setting_wallpaper"
            style="@style/Widget.MaterialComponents.Button.UnelevatedButton"
            android:layout_width="@dimen/dp_100"
            android:layout_height="@dimen/dp_32"
            android:layout_marginRight="@dimen/dp_6"
            android:insetTop="@dimen/dp_0"
            android:insetBottom="@dimen/dp_0"
            android:text="设为壁纸"
            android:theme="@style/Theme.MaterialComponents.Light.NoActionBar"
            app:backgroundTint="@color/white_2"
            app:cornerRadius="@dimen/dp_16"
            app:strokeColor="@color/white"
            app:strokeWidth="@dimen/dp_1" />
        <!--下载壁纸-->
        <com.google.android.material.button.MaterialButton
            android:id="@+id/btn_download"
            style="@style/Widget.MaterialComponents.Button.UnelevatedButton"
            android:layout_width="@dimen/dp_100"
            android:layout_height="@dimen/dp_32"
            android:layout_marginLeft="@dimen/dp_6"
            android:insetTop="@dimen/dp_0"
            android:insetBottom="@dimen/dp_0"
            android:text="下载壁纸"
            android:theme="@style/Theme.MaterialComponents.Light.NoActionBar"
            app:backgroundTint="@color/about_bg_color"
            app:cornerRadius="@dimen/dp_16" />
    </LinearLayout>



</RelativeLayout>

因为布局用的是ViewPager2。它可以直接传RecyclerView.Adapter进去,让我们希望的是,进入之后可以左右滑动查看壁纸,所以用到这个,那么怎么实现呢?首先需要展示的item布局。在app下的layout中创建一个item_image_list.xml文件,里面的布局代码如下:

<?xml version="1.0" encoding="utf-8"?>
<com.google.android.material.imageview.ShapeableImageView xmlns:android="http://schemas.android.com/apk/res/android"
   android:id="@+id/wallpaper"
    android:scaleType="centerCrop"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

然后在ImageActivity中,需要继承BaseActivity。里面的完整代码如下:

package com.llw.goodweather.ui;

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import androidx.annotation.Nullable;
import androidx.viewpager2.widget.ViewPager2;
import com.bumptech.glide.Glide;
import com.chad.library.adapter.base.BaseQuickAdapter;
import com.chad.library.adapter.base.BaseViewHolder;
import com.google.android.material.button.MaterialButton;
import com.google.gson.Gson;
import com.llw.goodweather.R;
import com.llw.goodweather.utils.Constant;
import com.llw.goodweather.utils.SPUtils;
import com.llw.goodweather.utils.StatusBarUtil;
import com.llw.goodweather.utils.ToastUtils;
import com.llw.mvplibrary.base.BaseActivity;
import com.llw.mvplibrary.bean.WallPaper;
import org.litepal.LitePal;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;
import butterknife.BindView;
import butterknife.OnClick;

/**
 * 查看图片
 *
 * @author llw
 */
public class ImageActivity extends BaseActivity {
    @BindView(R.id.iv_back)
    ImageView ivBack;
    @BindView(R.id.btn_setting_wallpaper)
    MaterialButton btnSettingWallpaper;
    @BindView(R.id.btn_download)
    MaterialButton btnDownload;
    @BindView(R.id.vp)
    ViewPager2 vp;

    List<WallPaper> mList = new ArrayList<>();
    WallPaperAdapter mAdapter;
    String wallpaperUrl = null;

    private int position;
    private Bitmap bitmap;


    @Override
    public void initData(Bundle savedInstanceState) {
        showLoadingDialog();
        //透明状态栏
        StatusBarUtil.transparencyBar(context);
        //获取位置
        position = getIntent().getIntExtra("position", 0);
        //获取数据
        mList = LitePal.findAll(WallPaper.class);
        Log.d("list-->", "" + mList.size());
        if (mList != null && mList.size() > 0) {
            for (int i = 0; i < mList.size(); i++) {
                if (mList.get(i).getImgUrl().equals("")) {
                    mList.remove(i);
                }
            }
        }
        Log.d("list-->", "" + mList.size());

        //RecyclerView实现方式
        mAdapter = new WallPaperAdapter(R.layout.item_image_list, mList);

        Log.d("wallPaper", new Gson().toJson(mList));

        //ViewPager2实现方式
        vp.setAdapter(mAdapter);

        vp.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
            @Override
            public void onPageSelected(int position) {
                Log.d("position-->", "" + position);
                wallpaperUrl = mList.get(position).getImgUrl();
                bitmap = getBitMap(wallpaperUrl);
            }
        });

        mAdapter.notifyDataSetChanged();
        vp.setCurrentItem(position, false);

        dismissLoadingDialog();
    }

    @Override
    public int getLayoutId() {
        return R.layout.activity_image;
    }


    @OnClick({R.id.iv_back, R.id.btn_setting_wallpaper, R.id.btn_download})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.iv_back:
                finish();
                break;
            //设置壁纸
            case R.id.btn_setting_wallpaper:
                //放入缓存
                SPUtils.putString(Constant.WALLPAPER_URL, wallpaperUrl, context);
                //壁纸列表
                SPUtils.putInt(Constant.WALLPAPER_TYPE, 1, context);
                ToastUtils.showShortToast(context, "已设置");
                break;
            //下载壁纸
            case R.id.btn_download:
                saveImageToGallery(context, bitmap);
                break;
            default:
                break;
        }
    }

    /**
     * 壁纸适配器
     */
    public class WallPaperAdapter extends BaseQuickAdapter<WallPaper, BaseViewHolder> {

        public WallPaperAdapter(int layoutResId, @Nullable List<WallPaper> data) {
            super(layoutResId, data);
        }

        @Override
        protected void convert(BaseViewHolder helper, WallPaper item) {
            ImageView imageView = helper.getView(R.id.wallpaper);
            Glide.with(mContext).load(item.getImgUrl()).into(imageView);
        }
    }

    /**
     * 保存图片到本地相册
     *
     * @param context 上下文
     * @param bitmap  bitmap
     * @return
     */
    public boolean saveImageToGallery(Context context, Bitmap bitmap) {
        // 首先保存图片
        String filePath = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + "good_weather";
        File appDir = new File(filePath);
        if (!appDir.exists()) {
            appDir.mkdir();
        }
        String fileName = "wallpaper" + 1024 + ".jpg";
        File file = new File(appDir, fileName);
        try {
            FileOutputStream fos = new FileOutputStream(file);
            //通过io流的方式来压缩保存图片
            boolean isSuccess = bitmap.compress(Bitmap.CompressFormat.JPEG, 60, fos);
            fos.flush();
            fos.close();
            //把文件插入到系统图库
            MediaStore.Images.Media.insertImage(context.getContentResolver(), file.getAbsolutePath(), fileName, null);
            //保存图片后发送广播通知更新数据库
            Uri uri = Uri.fromFile(file);
            context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, uri));
            if (isSuccess) {
                ToastUtils.showShortToast(context, "图片保存成功");
                return true;
            } else {
                ToastUtils.showShortToast(context, "图片保存失败");
                return false;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        ToastUtils.showShortToast(context, "图片保存失败");
        return false;
    }

    /**
     * Url转Bitmap
     *
     * @param url
     * @return
     */
    public Bitmap getBitMap(final String url) {
        //新启一个线程进行转换
        new Thread(new Runnable() {
            @Override
            public void run() {
                URL imageurl = null;
                try {
                    imageurl = new URL(url);
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                }
                try {
                    HttpURLConnection conn = (HttpURLConnection) imageurl.openConnection();
                    conn.setDoInput(true);
                    conn.connect();
                    InputStream inputStream = conn.getInputStream();
                    bitmap = BitmapFactory.decodeStream(inputStream);
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }).start();
        return bitmap;

    }

}

下面讲一下这个页面的业务逻辑。从WallPaperActivity中点击item活着是点击底部弹窗的时候传递点击的position过来。然后查询数据库中的壁纸表,移除掉ImgUrl为 “”的数据,因为这个数据是我手动加上去的,然后就是设置适配器给ViewPager2,滑动的时候获取选中页的图片地址,并将地址转成bitmap,然后当你点击底部的下载壁纸的时候,通过保存当前的bitmap到手机本地,页面的逻辑就讲完了。下面回到WallPaperActivity,在里面添加item的点击后的业务处理。

还差一步,那就是浮动按钮的点击事件没有写。

	@OnClick(R.id.fab_setting)
    public void onViewClicked() {
        fabSetting.hide();
        int type = SPUtils.getInt(Constant.WALLPAPER_TYPE, 4, context);
        showSettingDialog(type);
    }

那么到这里页面的代码就差不多写完了。累死我了,写完代码写博客,说真的写博客比写代码更累。下面就是回到MainActivity中去做壁纸的显示处理。在onResume方法中

方法代码如下:

	/**
     * 更换壁纸
     */
    private void updateWallpaper() {
        String imgUrl = SPUtils.getString(Constant.WALLPAPER_URL, null, context);
        if (imgUrl != null) {
            Glide.with(context).load(imgUrl).into(bg);
        } else {
            Glide.with(context).load(R.drawable.img_5).into(bg);
        }
    }

OK,代码就写完了。

3. 其他优化

我记得我之前说过有空就要优化那个搜索城市页面的弹窗,之前用的原生的比较的丑。所以现在自己创建了一个布局,在app中的layout下创建一个dialog_tip.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:background="@drawable/shape_white_5"
    android:layout_width="@dimen/dp_270"
    android:layout_height="wrap_content">
    <TextView
        android:id="@+id/tv_title"
        android:text="提示"
        android:padding="@dimen/dp_8"
        android:gravity="center"
        android:textSize="@dimen/sp_16"
        android:textColor="@color/black_4"
        android:layout_width="match_parent"
        android:layout_height="@dimen/dp_48"/>
    <TextView
        android:id="@+id/tv_content"
        android:text="内容"
        android:padding="@dimen/dp_20"
        android:gravity="center"
        android:textSize="@dimen/sp_14"
        android:textColor="@color/black_4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

    <View
        android:background="@color/gray"
        android:layout_width="match_parent"
        android:layout_height="0.3dp"/>
    
    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:id="@+id/tv_cancel"
            android:text="取消"
            android:gravity="center"
            android:padding="@dimen/dp_12"
            android:textSize="@dimen/sp_14"
            android:foreground="@drawable/bg_white"
            android:textColor="@color/black_4"
            android:layout_weight="1"
            android:layout_width="@dimen/dp_0"
            android:layout_height="wrap_content"/>
        <View
            android:background="@color/gray"
            android:layout_width="0.3dp"
            android:layout_height="match_parent"/>
        <TextView
            android:id="@+id/tv_sure"
            android:text="确定"
            android:gravity="center"
            android:foreground="@drawable/bg_white"
            android:padding="@dimen/dp_12"
            android:textSize="@dimen/sp_14"
            android:textColor="@color/black_4"
            android:layout_weight="1"
            android:layout_width="@dimen/dp_0"
            android:layout_height="wrap_content"/>
    </LinearLayout>
</LinearLayout>

进入SearchCityActivity

	/**
     * 提示弹窗
     */
    private AlertDialog tipDialog = null;

	/**
     * 显示提示弹窗
     * @param data 数据
     * @param content 内容
     */
    private void showTipDialog(Object data, String content) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context)
                .addDefaultAnimation()
                .setCancelable(true)
                .setContentView(R.layout.dialog_tip)
                .setWidthAndHeight(SizeUtils.dp2px(context, 270), LinearLayout.LayoutParams.WRAP_CONTENT)
                .setText(R.id.tv_content, content)
                .setOnClickListener(R.id.tv_cancel, v -> {
                    tipDialog.dismiss();
                }).setOnClickListener(R.id.tv_sure, v -> {
                    //传入all则删除所有
                    if (ALL_RECORD.equals(data)) {
                        flSearchRecords.setLimit(true);
                        //清除所有数据
                        mRecordsDao.deleteUsernameAllRecords();
                        llHistoryContent.setVisibility(View.GONE);
                    } else {
                        //删除某一条记录  传入单个的position
                        mRecordsDao.deleteRecord(recordList.get((Integer) data));
                        initTagFlowLayout();
                    }

                    tipDialog.dismiss();
                });
        tipDialog = builder.create();
        tipDialog.show();
    }

调用的地方。长按删除单条数据

点击删除全部数据

运行效果图如下所示:

搞定了。后面还会更新的,未完待续。

源码如下: Good Weather 欢迎Star或者Fork 联系邮箱 lonelyholiday@qq.com