在android中禁用特定activity的home键

Question

是否可以在应用程序中禁用特定activity的home键，就像我试过
设置为默认启动程序一样，但在所有activity中，home键将被设置为默认启动程序，而不是我只需要禁用特定activity的home键。有谁能帮我一下吗？

Answer 1

好吧，我有办法了。创建自定义类

private static class OverlayDialog extends AlertDialog {

    public OverlayDialog(Activity activity) {
        super(activity, R.style.OverlayDialog);
        WindowManager.LayoutParams params = getWindow().getAttributes();
        params.type = TYPE_SYSTEM_ERROR;
        params.dimAmount = 0.0F; // transparent
        params.width = 0;
        params.height = 0;
        params.gravity = Gravity.BOTTOM;
        getWindow().setAttributes(params);
        getWindow().setFlags(FLAG_SHOW_WHEN_LOCKED | FLAG_NOT_TOUCH_MODAL, 0xffffff);
        setOwnerActivity(activity);
        setCancelable(false);
    }

    public final boolean dispatchTouchEvent(MotionEvent motionevent) {
        return true;
    }

    protected final void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        FrameLayout framelayout = new FrameLayout(getContext());
        framelayout.setBackgroundColor(0);
        setContentView(framelayout);
    }
}

然后使用两个utiles方法进行锁定和解锁。

private OverlayDialog mOverlayDialog;

public void lock(Activity activity) {
    if (mOverlayDialog == null) {
        mOverlayDialog = new OverlayDialog(activity);
        mOverlayDialog.show();
    }
}

public void unlock() {
    if (mOverlayDialog != null) {
        mOverlayDialog.dismiss();
        mOverlayDialog = null;
    }
}