android开发小图标

⑴ android 能在屏幕上绘一张小图片，然后透明背景，还能操作能看到的背景桌面图标或程序。

package com.qdsx.cml;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
//import android.view.animation.AnimationUtils;
import android.view.animation.RotateAnimation;
import android.view.animation.ScaleAnimation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
public class TestdonghuaActivity extends Activity {
private ImageView tweenMM;
// private Animation animation;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
tweenMM =(ImageView)findViewById(R.id.imageView1);
}

//渐变
public void BtnAlphaOnClick(View view){
//this.doStartAnimation(R.anim.alpha_animation);
Animation b = new AlphaAnimation(0.1f, 1.0f);
b.setDuration(2000);
tweenMM.startAnimation(b);
}
//旋转
public void BtnrotateOnClick(View view){
//this.doStartAnimation(R.anim.rotate_animation);
Animation c = new RotateAnimation(0, 360,Animation.RELATIVE_TO_SELF,0.5f,Animation.RELATIVE_TO_SELF,0.5f);
c.setDuration(3000);
tweenMM.startAnimation(c);
}
//缩放
public void BtnScaleOnClick(View view){
//this.doStartAnimation(R.anim.scale_animation);
Animation d = new ScaleAnimation(0f, 1f, 0f, 1f, Animation.RELATIVE_TO_SELF,0.5f, Animation.RELATIVE_TO_SELF,0.5f);
d.setDuration(3000);
tweenMM.startAnimation(d);
}
//位移
public void BtnTransalteOnclick(View view){
//this.doStartAnimation(R.anim.translate_animation);
Animation a= new TranslateAnimation(0, 100, 0, 100);
a.setDuration(5000);
a.setFillAfter(true);//使图片移动后固定
tweenMM.startAnimation(a);
}

//开始动画方法
/* private void doStartAnimation(int animid){
animation = AnimationUtils.loadAnimation(this, animid);
animation.setFillAfter(true);//使图片移动后固定
tweenMM.startAnimation(animation);
}*/
}