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/*
* 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 com.example.android.apis.graphics.CubeRenderer;
import android.app.Activity;
import android.opengl.GLSurfaceView;
import android.os.Bundle;
import android.view.SurfaceView;
import android.view.WindowManager;
/**
* <h3>Secure Window Activity</h3>
*
* <p>
* This activity demonstrates how to create a {@link SurfaceView} backed by
* a secure surface using {@link SurfaceView#setSecure}.
* 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 SecureSurfaceViewActivity extends Activity {
private GLSurfaceView mSurfaceView;
/**
* 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_surface_view_activity.xml for this
// view layout definition, which is being set here as
// the content of our screen.
setContentView(R.layout.secure_surface_view_activity);
// Set up the surface view.
// We use a GLSurfaceView in this demonstration but ordinary
// SurfaceViews also support the same secure surface functionality.
mSurfaceView = (GLSurfaceView)findViewById(R.id.surface_view);
mSurfaceView.setRenderer(new CubeRenderer(false));
// Make the surface view secure. This must be done at the time the surface view
// is created before the surface view's containing window is attached to
// the window manager which happens after onCreate returns.
// It cannot be changed later.
mSurfaceView.setSecure(true);
}
@Override
protected void onResume() {
// Be sure to call the super class.
super.onResume();
// Resume rendering.
mSurfaceView.onResume();
}
@Override
protected void onPause() {
// Be sure to call the super class.
super.onPause();
// Pause rendering.
mSurfaceView.onPause();
}
}
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