import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.Rect; import android.util.Log; import android.view.View; public class ScreenShot {     // 获取指定Activity的截屏，保存到png文件     private static Bitmap takeScreenShot(Activity activity) {         // View是你需要截图的View         View view = activity.getWindow().getDecorView();         view.setDrawingCacheEnabled(true);         view.buildDrawingCache();         Bitmap b1 = view.getDrawingCache();         // 获取状态栏高度         Rect frame = new Rect();         activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);         int statusBarHeight = frame.top;         Log.i("TAG", "" + statusBarHeight);         // 获取屏幕长和高         int width = activity.getWindowManager().getDefaultDisplay().getWidth();         int height = activity.getWindowManager().getDefaultDisplay()                 .getHeight();         // 去掉标题栏         // Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);         Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height                 - statusBarHeight);         view.destroyDrawingCache();         return b;     }     // 保存到sdcard     private static void savePic(Bitmap b, String strFileName) {         FileOutputStream fos = null;         try {             fos = new FileOutputStream(strFileName);             if (null != fos) {                 b.compress(Bitmap.CompressFormat.PNG, 90, fos);                 fos.flush();                 fos.close();             }         } catch (FileNotFoundException e) {             e.printStackTrace();         } catch (IOException e) {             e.printStackTrace();         }     }     // 程序入口     public static void shoot(Activity a) {         ScreenShot.savePic(ScreenShot.takeScreenShot(a), "sdcard/xx.png");     } }

@Override     public void onWindowFocusChanged(boolean hasFocus) {         // TODO Auto-generated method stub         super.onWindowFocusChanged(hasFocus);         ScreenShot.shoot(this);     }中调用