Activity全透明渐变切换

类似于Dialog的显示动画效果一样

1. 先设置Acitivity为去透明，在取消掉Activity默认的切换动画

<style name="AppTheme2" parent="Theme.AppCompat.Light"> <!-- Customize your theme here. --> <item name="windowNoTitle">true</item> <item name="colorPrimary">@color/colorPrimary</item> <item name="colorPrimaryDark">@color/tabbackground</item> <item name="colorAccent">@color/colorAccent</item> 　　<item name="android:windowBackground">@color/transparent</item>//这个之时全透明 <item name="android:windowIsTranslucent">true</item> <item name="android:windowAnimationStyle">@style/activityanimation</item> </style> <style name="activityanimation" > <item name="android:activityOpenEnterAnimation">@null</item> <item name="android:activityOpenExitAnimation">@null</item> <item name="android:activityCloseEnterAnimation">@null</item> <item name="android:activityCloseExitAnimation">@null</item> </style>

2. 设置渐变动画：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/ll" android:orientation="vertical" android:layout_width="match_parent" android:background="#000" android:layout_height="match_parent"> <MyImageView android:layout_width="match_parent" android:layout_height="300dp" android:layout_centerInParent="true" android:clickable="true" android:background="@mipmap/meinv"/></RelativeLayout>public class Activitytwo extends AppCompatActivity{ private int tran=0x00000000; private int end=0x88000000; private RelativeLayout ll; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.ativity); ll = (RelativeLayout) findViewById(R.id.ll); returnposition(); ll.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { finish(); } }); } public void returnposition() { ValueAnimator colorAnim = ObjectAnimator.ofInt(ll, "backgroundColor", tran, end); colorAnim.setDuration(300); colorAnim.setEvaluator(new ArgbEvaluator()); colorAnim.start(); } @Override public void finish() { ValueAnimator colorAnim = ObjectAnimator.ofInt(ll, "backgroundColor", end, tran); colorAnim.setDuration(300); colorAnim.setEvaluator(new ArgbEvaluator()); colorAnim.start(); super.finish(); }}

以上这篇Android开发之Activity全透明渐变切换方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。