2011.09.01（四）——— android 应用程序跳转到桌面

public boolean onKeyDown(int keyCode, KeyEvent event) {						if (keyCode == KeyEvent.KEYCODE_BACK) {            			Intent intent = new Intent(Intent.ACTION_MAIN);			intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);			intent.addCategory(Intent.CATEGORY_HOME); 			this.startActivity(intent);            			return true;		} else {			return super.onKeyDown(keyCode, event);		}			}