DO NOT MERGE Take advantage of new MotionEvent flag to prevent tapjacking. am: b431433d

                    android:text="@string/grant_dialog_button_deny" >

                </Button>

                <Button

                <com.android.packageinstaller.permission.ui.SecureButtonView

                    android:id="@+id/permission_allow_button"

                    android:layout_width="wrap_content"

                    android:layout_height="wrap_content"

                    style="?android:attr/buttonBarButtonStyle"

                    android:layout_marginStart="8dip"

                    android:text="@string/grant_dialog_button_allow" >

                </Button>

                </com.android.packageinstaller.permission.ui.SecureButtonView>

            </LinearLayout>

/*

 * Copyright (C) 2016 The Android Open Source Project

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *      http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.android.packageinstaller.permission.ui;

import android.content.Context;

import android.util.AttributeSet;

import android.view.MotionEvent;

import android.widget.Button;

/**

 * Extension of Button that uses the hidden MotionEvent flag for partially obscured windows to

 * prevent tapjacking attacks.

 */

public class SecureButtonView extends Button {

    public SecureButtonView(Context context) {

        this(context, null);

    }

    public SecureButtonView(Context context, AttributeSet attrs) {

        this(context, attrs, 0);

    }

    public SecureButtonView(Context context, AttributeSet attrs, int defStyleAttr) {

        this(context, attrs, defStyleAttr, 0);

    }

    public SecureButtonView(Context context, AttributeSet attrs, int defStyleAttr,

            int defStyleRes) {

        super(context, attrs, defStyleAttr, defStyleRes);

    }

    @Override

    public boolean onFilterTouchEventForSecurity(MotionEvent event) {

        if ((event.getFlags() & MotionEvent.FLAG_WINDOW_IS_OBSCURED) != 0

                || (event.getFlags() & MotionEvent.FLAG_WINDOW_IS_PARTIALLY_OBSCURED) != 0) {

            // Window is obscured, drop this touch.

            return false;

        }

        return true;

    }

}