Android，imageview帮助。如果我替换上一张图片，它是否内存不足？

}

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我在想办法。在我点击按钮后，马被拉布拉多犬取代，我的问题是，马的图片还在记忆中吗？如果我再把它放回去，会不会有两个相同图片的实例

在设置新位图之前，可以尝试检索ImageView内容：

public class TestingActivity extends Activity  {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(getStringIdentifier(getBaseContext(),"main","layout"));
    final ImageView iv=(ImageView) findViewById(R.id.imageView1);
    final Resources res=getResources();
    iv.setImageDrawable(res.getDrawable(R.drawable.horse));
    Button b1=(Button) findViewById(R.id.button1);
    b1.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            // TODO Auto-generated method stub
            iv.setImageDrawable(res.getDrawable(R.drawable.labrador));
        }
    });
}
public static int getStringIdentifier(Context context, String name,String resource) {
    return context.getResources().getIdentifier(name, resource, context.getPackageName());
}

BitmapDrawable content = (BitmapDrawable)iv.getDrawable();
if (content != null) {
     Bitmap contentBitmap = content.getBitmap();
     if (contentBitmap != null) {
           contentBitmap.recycle();
           contentBitmap = null;
     }
}