android屏蔽返回键和home键等各个按键的方法

  屏蔽返回键的代码: public boolean onKeyDown(int keyCode,KeyEvent event){ switch(keyCode){ case KeyEvent.KEYCODE_HOME:return true; case KeyEvent.KEYCODE_BACK:return true; case KeyEvent.KEYCODE_CALL:return true; case KeyEvent.KEYCODE_SYM: return true; case KeyEvent.KEYCODE_VOLUME_DOWN: return true; case KeyEvent.KEYCODE_VOLUME_UP: return true; case KeyEvent.KEYCODE_STAR: return true; } return super.onKeyDown(keyCode, event); }  屏蔽home键的代码: public void onAttachedToWindow() { this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); super.onAttachedToWindow(); }