Android实现顶部悬浮效果

本文实例为大家分享了Android实现顶部悬浮效果的具体代码，供大家参考，具体内容如下

效果图

布局

<?xml version="1.0" encoding="utf-8"? 
<android.support.v4.widget.SwipeRefreshLayout 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:id="@+id/swipeRefreshLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".ui.activity.NewPersonalCardActivity" 
<android.support.design.widget.CoordinatorLayout
android:id="@+id/rootLayout"
android:layout_width="match_parent"
android:layout_height="match_parent" 
<android.support.design.widget.AppBarLayout
android:id="@+id/appBarLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content" 
<android.support.design.widget.CollapsingToolbarLayout
android:id="@+id/collapsingToolbarLayout"
android:layout_width="match_parent"
android:layout_height="192dp"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:titleEnabled="false" 
<LinearLayout
android:id="@+id/headLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
app:layout_collapseMode="pin"
app:layout_collapseParallaxMultiplier="0.7" 
<include layout="@layout/personal_new_top" / 
</LinearLayout 
<android.support.v7.widget.Toolbar
android:id="@+id/toolBar"
android:layout_width="match_parent"
android:layout_height="44dp"
android:background="@color/white"
android:navigationIcon="@drawable/icon_back"
app:contentInsetLeft="0dp"
app:contentInsetStart="0dp"
app:layout_collapseMode="pin"
app:navigationIcon="@drawable/icon_back" 
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:singleLine="true"
android:textColor="@color/c333333"
android:textSize="16sp"
tools:text="讲师" / 
</android.support.v7.widget.Toolbar 
</android.support.design.widget.CollapsingToolbarLayout 
<include layout="@layout/new_personal_tabs" / 
</android.support.design.widget.AppBarLayout 
<android.support.v4.widget.NestedScrollView
android:id="@+id/nestedScrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true"
android:scrollbars="none"
app:layout_behavior="@string/appbar_scrolling_view_behavior" 
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" / 
</android.support.v4.widget.NestedScrollView 
</android.support.design.widget.CoordinatorLayout 
</android.support.v4.widget.SwipeRefreshLayout

java

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ARouter.getInstance().inject(this);
setContentView(R.layout.activity_new_personal_card);
ButterKnife.bind(this);
setSupportActionBar(toolBar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowTitleEnabled(false);
toolBar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
onBackPressed();
}
});
initData();
}
　　private void initRefresh() {
appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
@Override
public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
if (verticalOffset  = 0) {
swipeRefreshLayout.setEnabled(true);
} else {
swipeRefreshLayout.setEnabled(false);
}
}
});
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
initData();
swipeRefreshLayout.setRefreshing(false);
}
});
}

注意事项

1.清单文件需要配置

android:theme="@style/personalCard"

<style name="personalCard" parent="Theme.AppCompat.Light.DarkActionBar" 
<!-- Customize your theme here. -- 
<item name="windowActionBar" false</item 
<item name="windowNoTitle" true</item 
<item name="colorPrimary" @color/colorPrimary</item 
<item name="colorPrimaryDark" @color/colorPrimaryDark</item 
<item name="colorAccent" @color/colorAccent</item 
</style

2.gradle配置需要24以上

compileSdkVersion 24
//------------------ 在线依赖开始 ----------------
compile 'com.android.support:appcompat-v7:24.2.0'
compile 'com.android.support:recyclerview-v7:24.2.0'
compile 'com.android.support:cardview-v7:24.2.0'
compile 'com.android.support:design:24.2.0'

3.recyclerView的下滑和swipRefreshLayout的下拉刷新会冲突，所以需要监听appBarLayout的位移，当位移等于0时，即appBarLayout全部展示，可以下拉刷新

4.string.xml

复制代码代码如下:

<string name=”appbar_scrolling_view_behavior” translatable=”false” android.support.design.widget.AppBarLayout$ScrollingViewBehavior</string

切记

以上就是本文的全部内容，希望对大家的学习有所帮助。