截获HOME键

只有在LEVEL 5及以上才能够使用这个方法：
@Override public void onAttachedToWindow() { getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD); super.onAttachedToWindow(); }
@Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_HOME) { Toast.makeText(this, "截获了HOME键", Toast.LENGTH_LONG).show(); return true; } return super.onKeyDown(keyCode, event); }