animation listerner 在动画开始、重复、结束后设置通知

最新推荐文章于 2022-07-27 16:41:39 发布

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最新推荐文章于 2022-07-27 16:41:39 发布

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分类专栏： Android平台

本文链接：https://blog.youkuaiyun.com/kylin_fire_zeng/article/details/42082593

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原创：kylin_zeng http://blog.chinaunix.net/uid/23795897.html在此感谢mars 老师的帮助。转载请注明原创出处，尊重他人的劳动成果。

1、animationListener 监听器，它是在动画执行的各个阶段会得到通知，从而调用相应的方法：
1.1 onAnimationEnd(Animation animation) //动画执行结束
1.2 onAnimationRepeat(Animation animation) //动画重新执行
1.3 onAnimationStart(Animation animation) //动画开始

2、例如：

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package mars.animation07;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
private Button removeButton = null;
private Button addButton = null;
private ImageView imageView = null;
private ViewGroup viewGroup = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
removeButton = (Button)findViewById(R.id.removeButtonId);
imageView = (ImageView)findViewById(R.id.imageViewId);
removeButton.setOnClickListener(new RemoveButtonListener());
viewGroup = (ViewGroup)findViewById(R.id.layoutId);
addButton = (Button)findViewById(R.id.addButtonId);
addButton.setOnClickListener(new AddButtonListener());
}
private class AddButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
//创建了一个淡入效果的Animation对象
AlphaAnimation animation = new AlphaAnimation(0.0f,1.0f);
animation.setDuration(1000);
animation.setStartOffset(500);
//创建一个新的ImageView
ImageView imageViewAdd = new ImageView(MainActivity.this);
imageViewAdd.setImageResource(R.drawable.icon);
//将新的ImageView添加到viewGroup当中
viewGroup.addView(imageViewAdd, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
//启动动画
imageViewAdd.startAnimation(animation);
}
}
private class RemoveButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
//创建一个淡出效果的Animation对象
AlphaAnimation animation = new AlphaAnimation(1.0f,0.0f);
//为Animation对象设置属性
animation.setDuration(1000);
animation.setStartOffset(500);
//为Animation对象设置监听器
animation.setAnimationListener(new RemoveAnimationListener());
imageView.startAnimation(animation);
}
}
private class RemoveAnimationListener implements AnimationListener{
//该方法在淡出效果执行结束之后被调用
@Override
public void onAnimationEnd(Animation animation) {
System.out.println("end");
//从viewGroup当中删除掉imageView控件
viewGroup.removeView(imageView);
}
@Override
public void onAnimationRepeat(Animation animation) {
System.out.println("repeat");
}
@Override
public void onAnimationStart(Animation animation) {
System.out.println("start");
}
}
}