| /* |
| * Copyright (C) 2012 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.app; |
| |
| import com.example.android.apis.R; |
| |
| import android.app.Activity; |
| import android.app.AlertDialog; |
| import android.os.Bundle; |
| import android.view.View; |
| import android.view.WindowManager; |
| import android.widget.Button; |
| |
| /** |
| * <h3>Secure Dialog Activity</h3> |
| * |
| * <p> |
| * This activity demonstrates how to create a dialog whose window is backed by |
| * a secure surface using {@link WindowManager.LayoutParams#FLAG_SECURE}. |
| * Because the surface is secure, its contents cannot be captured in screenshots |
| * and will not be visible on non-secure displays even when mirrored. |
| * </p><p> |
| * Here are a few things you can do to experiment with secure surfaces and |
| * observe their behavior. |
| * <ul> |
| * <li>Try taking a screenshot. Either the system will prevent you from taking |
| * a screenshot altogether or the screenshot should not contain the contents |
| * of the secure surface. |
| * <li>Try mirroring the secure surface onto a non-secure display such as an |
| * "Overlay Display" created using the "Simulate secondary displays" option in |
| * the "Developer options" section of the Settings application. The non-secure |
| * secondary display should not show the contents of the secure surface. |
| * <li>Try mirroring the secure surface onto a secure display such as an |
| * HDMI display with HDCP enabled. The contents of the secure surface should appear |
| * on the display. |
| * </ul> |
| * </p> |
| */ |
| public class SecureDialogActivity extends Activity |
| implements View.OnClickListener { |
| /** |
| * Initialization of the Activity after it is first created. Must at least |
| * call {@link android.app.Activity#setContentView setContentView()} to |
| * describe what is to be displayed in the screen. |
| */ |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| // Be sure to call the super class. |
| super.onCreate(savedInstanceState); |
| |
| // See assets/res/any/layout/secure_dialog_activity.xml for this |
| // view layout definition, which is being set here as |
| // the content of our screen. |
| setContentView(R.layout.secure_dialog_activity); |
| |
| // Handle click events on the button to show the dialog. |
| Button button = (Button)findViewById(R.id.show); |
| button.setOnClickListener(this); |
| } |
| |
| /** |
| * Called when the button to show the dialog is clicked. |
| */ |
| @Override |
| public void onClick(View v) { |
| // Create a dialog. |
| AlertDialog dialog = new AlertDialog.Builder(this) |
| .setPositiveButton(android.R.string.ok, null) |
| .setMessage(R.string.secure_dialog_dialog_text) |
| .create(); |
| |
| // Make the dialog secure. This must be done at the time the dialog is |
| // created. It cannot be changed after the dialog has been shown. |
| dialog.getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE, |
| WindowManager.LayoutParams.FLAG_SECURE); |
| |
| // Show the dialog. |
| dialog.show(); |
| } |
| } |