Android 实现截屏功能的实例

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);  }