Android example source code file (SecureViewOverlay.java)

This example Android source code file (SecureViewOverlay.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, attributeset, content, override, secureviewoverlay, ui, util, utilities, utils, view, viewgroup

The SecureViewOverlay.java Android example source code

/*
 * Copyright (C) 2010 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.example.android.apis.view;

import com.example.android.apis.R;

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;

/**
 * This view is part of the {@link SecureView} demonstration activity.
 *
 * This view is constructed in such a way as to obscure the buttons and descriptive
 * text of the activity in a poor attempt to fool the user into clicking on the buttons
 * despite the activity telling the user that they may be harmful.
 */
public class SecureViewOverlay extends ViewGroup {
    private SecureView mActivity;

    public SecureViewOverlay(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public void setActivityToSpoof(SecureView activity) {
        this.mActivity = activity;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        measureChildren(widthMeasureSpec, heightMeasureSpec);

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        spoofLayout(findViewById(R.id.secure_view_overlay_description),
                mActivity.findViewById(R.id.secure_view_description));
        spoofLayout(findViewById(R.id.secure_view_overlay_button1),
                mActivity.findViewById(R.id.secure_view_unsecure_button));
        spoofLayout(findViewById(R.id.secure_view_overlay_button2),
                mActivity.findViewById(R.id.secure_view_builtin_secure_button));
        spoofLayout(findViewById(R.id.secure_view_overlay_button3),
                mActivity.findViewById(R.id.secure_view_custom_secure_button));
    }

    private void spoofLayout(View spoof, View original) {
        final int[] globalPos = new int[2];
        getLocationOnScreen(globalPos);
        int x = globalPos[0];
        int y = globalPos[1];

        original.getLocationOnScreen(globalPos);
        x = globalPos[0] - x;
        y = globalPos[1] - y;
        spoof.layout(x, y, x + original.getWidth(), y + original.getHeight());
    }
}