小编Kei*_*ith的帖子

我已经在这几天苦苦挣扎,最后才决定问.这很简单,我必须遗漏一些非常基本的东西.

我有一个XML布局页面,其中定义了图像.我有两个动画XML页面,一个用于将alpha从0更改为1,另一个用于从1更改为0以创建"闪烁"效果.所以alphaAnimation是用XML定义的,我只需要调用它.

图像弹出,但没有循环闪烁效果.

public class blinker extends Activity {

   //create name of animation
Animation myFadeInAnimation;
Animation myFadeOutAnimation;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.scanning_view);

 //grab the imageview and load the animations
    ImageView myImageView = (ImageView) findViewById(R.id.blinkingView01); 
    Animation myFadeInAnimation = AnimationUtils.loadAnimation(null, R.anim.fade_in);
    Animation myFadeOutAnimation = AnimationUtils.loadAnimation(null, R.anim.fade_out);

//fade it in, and fade it out. 
    myImageView.startAnimation(myFadeInAnimation);
    myImageView.startAnimation(myFadeOutAnimation);
     }
}   

Anim资源中的两个XML动画布局:

<?xml version="1.0" encoding="UTF-8"?> 
<set xmlns:android="http://schemas.android.com/apk/res/android"> 
    <alpha android:fromAlpha="0.0" 
    android:toAlpha="1.0" 
    android:interpolator="@android:anim/accelerate_interpolator"  
    android:duration="50" android:repeatCount="infinite"/> 
 </set> …