Android GridView实现横向列表水平滚动

时间:2018-07-17
这篇文章主要为大家详细介绍了Android GridView实现横向列表水平滚动,具有一定的参考价值,感兴趣的小伙伴们可以参考一下

本文实例为大家分享了Android GridView实现横向列表水平滚动的具体代码,供大家参考,具体内容如下

有时候根据项目需要,使用可横向滑动的GridView。仅以该文记录一下,毕竟没什么技术含量。

1.主界面布局代码:activity_main.xml。设置android:numColumns=”auto_fit”是因为可以不定项的添加子项。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="vertical">

  <HorizontalScrollView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">

    <LinearLayout
      android:layout_width="wrap_content"
      android:layout_height="fill_parent">

      <view.gridviewdemo.AblGridView
        android:id="@+id/id_gridview_home"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:gravity="center"
        android:numColumns="auto_fit"
        android:scrollbars="none"
        android:stretchMode="spacingWidthUniform"/>
    </LinearLayout>
  </HorizontalScrollView>

</LinearLayout>

2.主界面GridView列表子项布局文件:home_gridview_item.xml

<?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:layout_gravity="center"
  android:layout_margin="0dp"
  android:background="#ffffff"
  android:orientation="vertical">

  <ImageView
    android:id="@+id/id_iv_item"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:layout_marginTop="10dp"
    android:gravity="center" />

  <TextView
    android:id="@+id/id_tv_item"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_horizontal"
    android:layout_marginTop="5dp"
    android:gravity="center"
    android:paddingBottom="10dp"
    android:text="标题文字"
    android:textSize="12sp" />
</LinearLayout>

3.java实现代码:MainActivity.java

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.widget.GridView;
import android.widget.LinearLayout;

public class MainActivity extends AppCompatActivity {
  AblGridView id_gridview_home;
  private int[] imgs = {R.mipmap.index1_nav_xc, R.mipmap.index1_nav_xc,
      R.mipmap.index1_nav_xc, R.mipmap.index1_nav_xc, R.mipmap.index1_nav_xc};
  private String[] titles = new String[]{"子项1", "子项2","子项3","子项4", "子项5"};
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    id_gridview_home= (AblGridView) findViewById(R.id.id_gridview_home);
    setGridView();
  }

  /**设置GirdView参数,绑定数据*/
  private void setGridView() {
    int size = imgs.length;
    int length = 100;
    DisplayMetrics dm = new DisplayMetrics();
    getWindowManager().getDefaultDisplay().getMetrics(dm);
    float density = dm.density;
    int gridviewWidth = (int) (size * (length + 4) * density);
    int itemWidth = (int) (length * density);
    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
        gridviewWidth, LinearLayout.LayoutParams.FILL_PARENT);
    id_gridview_home.setLayoutParams(params); // 设置GirdView布局参数,横向布局的关键
    id_gridview_home.setColumnWidth(itemWidth); // 设置列表项宽
    id_gridview_home.setHorizontalSpacing(5); // 设置列表项水平间距
    id_gridview_home.setStretchMode(GridView.NO_STRETCH);
    id_gridview_home.setNumColumns(size); // 设置列数量=列表集合数
    AblGridViewBaseAdapter adapter = new AblGridViewBaseAdapter(this,imgs,titles);
    id_gridview_home.setAdapter(adapter);
  }
}

4.自定义控件:AblGridView

import android.content.Context;
import android.util.AttributeSet;
import android.widget.GridView;

/**
 * 继承GridView控件,为了更友好的显示
 * 解决在scrollview中只显示第一行数据的问题
 */
public class AblGridView extends GridView {
  public AblGridView(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  public AblGridView(Context context) {
    super(context);
  }

  public AblGridView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }

  @Override
  public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
        MeasureSpec.AT_MOST);
    super.onMeasure(widthMeasureSpec, expandSpec);
  }

}

5.重写适配器:AblGridViewBaseAdapter

import android.content.Context;
import android.util.SparseArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

/**
 * 重写适配器
 */
public class AblGridViewBaseAdapter extends BaseAdapter {

  private Context mContext;
  private String[] Title;//显示标题数组
  private int[] Imgs;//显示图标数组

  public AblGridViewBaseAdapter(Context mContext,int[] imgs ,String[] titles) {
    super();
    this.mContext = mContext;
    Title = titles;
    Imgs = imgs;
  }

  @Override
  public int getCount() {
    return Title.length;
  }

  @Override
  public Object getItem(int position) {
    return position;
  }

  @Override
  public long getItemId(int position) {
    return position;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    convertView = loadHomeHyOrYs(position, convertView, parent);
    return convertView;
  }

  /**
   * 加载会员或医生的功能列表
   */
  public View loadHomeHyOrYs(int position, View convertView, ViewGroup parent) {
    if (convertView == null) {
      convertView = LayoutInflater.from(mContext).inflate(
          R.layout.home_gridview_item, parent, false);
    }
    TextView tv = get(convertView, R.id.id_tv_item);
    ImageView iv = get(convertView, R.id.id_iv_item);
    iv.setBackgroundResource(Imgs[position]);
    tv.setText(Title[position]);
    return convertView;
  }

  public <T extends View> T get(View view, int id) {
    SparseArray<View> viewHolder = (SparseArray<View>) view.getTag();
    if (viewHolder == null) {
      viewHolder = new SparseArray<View>();
      view.setTag(viewHolder);
    }
    View childView = viewHolder.get(id);
    if (childView == null) {
      childView = view.findViewById(id);
      viewHolder.put(id, childView);
    }
    return (T) childView;
  }

}

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。