屏蔽Home按键

1. 屏蔽Activity的Home键功能
@Override
public void onAttachedToWindow() {
    this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD);
    super.onAttachedToWindow();
}

2. 屏蔽 Dialog风格Activity的Home键功能
@Override
public void onAttachedToWindow() {
    this.getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);
    super.onAttachedToWindow();
}
这里之所以和Activity区分,是因为Dialog风格Activity如果用第一种方法,这个Dialog风格Activity的背景就变成黑色的,而不是透明的.

3.屏蔽AlertDialog的Home键功能
AlertDialog d = b.create();
d.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);