Android 模仿电视机关闭界面

Tween动画

1.在关闭电视机的时候，电视机中间都有一根白条瞬间关闭。

　　要实现这个效果其实就是利用Tween动画进行实现的。

动画的xml 文件是：

　　　 android:startOffset=""  利用这个属性可以实现动画执行的先后顺序

 <?xml version="1.0" encoding="utf-8"?>
 <set xmlns:android="http://schemas.android.com/apk/res/android"
     android:shareInterpolator="false"
     android:zAdjustment="top" >
 
     <scale
         android:duration="5000"
         android:fromXScale="1.0"
         android:fromYScale="1.0"
         android:interpolator="@android:anim/accelerate_interpolator"
         android:pivotX="50%"
         android:pivotY="50%"
         android:toXScale="1.0"
         android:toYScale="0.003" />
     <scale
         android:duration="3000"
         android:fromXScale="1.0"
         android:fromYScale="1.0"
         android:interpolator="@android:anim/accelerate_interpolator"
         android:pivotX="50%"
         android:pivotY="50%"
         android:startOffset="5000"
         android:toXScale="0.0"
         android:toYScale="0.3" />
 
     <alpha
         android:duration="3000"
         android:fillAfter="true"
         android:fillEnabled="true"
         android:fromAlpha="1.0"
         android:interpolator="@android:anim/accelerate_interpolator"
         android:startOffset="5000"
         android:toAlpha="0" />
 
     <rotate
         android:fromDegrees="0.0"
         android:toDegrees="360.0"
         android:pivotX="50%"
         android:pivotY="50%"
         android:fillAfter="true"
         android:interpolator="@android:anim/linear_interpolator"
         android:duration="5000"
         />
 
 </set>

主界面的Activity

 public class MainActivity extends Activity {
 
     private ImageView back , line;
 
     private Animation mAnimation;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         initView();
     }
 
     private void initView() {
         back = (ImageView)findViewById(R.id.img_back);
         line = (ImageView)findViewById(R.id.img_line);
         mAnimation = AnimationUtils.loadAnimation(MainActivity.this,R.anim.tv_off);
         mAnimation.setAnimationListener(new AnimationListener() {
 
             @Override
             public void onAnimationStart(Animation animation) {
 
             }
 
             @Override
             public void onAnimationRepeat(Animation animation) {
 
             }
 
             @Override
             public void onAnimationEnd(Animation animation) {
 
             }
         });
 
         line.setVisibility(View.VISIBLE);
         line.setAnimation(mAnimation);
 //        mAnimation.start();
 
     }
 
 }

activity_main.xml:

 <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context=".MainActivity" >
 
     <ImageView
         android:id="@+id/img_back"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:background="@color/black" />
 
     <ImageView
         android:id="@+id/img_line"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:background="@color/white"
         android:visibility="gone"
         />
 
 </FrameLayout>

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