android屏蔽返回键和Home键

//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();

}