android 截图方法

public class ScreenshotDemoActivity extends Activity {       private Button shotButton;       private ImageView imageView;       @Override       public void onCreate(Bundle savedInstanceState) {           super.onCreate(savedInstanceState);           setContentView(R.layout.main);           shotButton=(Button)findViewById(R.id.shotButton);           imageView=(ImageView)findViewById(R.id.imageView);           shotButton.setOnClickListener(new OnClickListener() {               @Override               public void onClick(View v) {                   //Bitmap-->Drawable                    BitmapDrawable bd=new BitmapDrawable(shot());                   imageView.setBackgroundDrawable(bd);   //              imageView.setImageBitmap(shot());                }           });       }          /**       * 截屏方法       * @return       */       private Bitmap shot() {           View view = getWindow().getDecorView();           Display display = this.getWindowManager().getDefaultDisplay();           view.layout(0, 0, display.getWidth(), display.getHeight());           view.setDrawingCacheEnabled(true);//允许当前窗口保存缓存信息，这样getDrawingCache()方法才会返回一个Bitmap            Bitmap bmp = Bitmap.createBitmap(view.getDrawingCache());           return bmp;       }   }
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