图片的淡入淡出效果实现

还算简单，先发个图看看效果。

主文件：

import android.app.Activity;
import android.os.Bundle;
import android.view.animation.AnimationUtils;
import android.widget.ViewFlipper;

public class TextAnimationActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        ViewFlipper viewFilpper = (ViewFlipper) findViewById(R.id.flipper);
        viewFilpper.setInAnimation(AnimationUtils.loadAnimation(this,R.anim.push_in));
        viewFilpper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_out));
        viewFilpper.startFlipping();
    }
}

anim文件：

push_in.xml

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android">

  <translate android:fromYDelta="100" 
             android:toYDelta="0" 
             android:duration="3000"/>

  <alpha android:fromAlpha="0.0" 
         android:toAlpha="1.0" 
         android:duration="3000" />
</set>

push_out.xml

<?xml version="1.0" encoding="utf-8"?>

<set xmlns:android="http://schemas.android.com/apk/res/android">

  <translate android:fromYDelta="0" 
             android:toYDelta="-100" 
             android:duration="500"/>

  <alpha android:fromAlpha="1.0" 
         android:toAlpha="0.0" 
         android:duration="500" />
</set>

OK!