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package com.android.launcher3.util;
/**
* Copyright (C) 2015 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.
*/
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.res.Configuration;
import android.graphics.Point;
import android.hardware.display.DisplayManager;
import android.hardware.display.DisplayManager.DisplayListener;
import android.os.Handler;
import android.util.Log;
import android.view.Display;
import android.view.WindowManager;
/**
* {@link BroadcastReceiver} which watches configuration changes and
* restarts the process in case changes which affect the device profile occur.
*/
public class ConfigMonitor extends BroadcastReceiver implements DisplayListener {
private static final String TAG = "ConfigMonitor";
private final Point mTmpPoint1 = new Point();
private final Point mTmpPoint2 = new Point();
private final Context mContext;
private final float mFontScale;
private final int mDensity;
private final int mDisplayId;
private final Point mRealSize;
private final Point mSmallestSize, mLargestSize;
public ConfigMonitor(Context context) {
mContext = context;
Configuration config = context.getResources().getConfiguration();
mFontScale = config.fontScale;
mDensity = config.densityDpi;
Display display = getDefaultDisplay(context);
mDisplayId = display.getDisplayId();
mRealSize = new Point();
display.getRealSize(mRealSize);
mSmallestSize = new Point();
mLargestSize = new Point();
display.getCurrentSizeRange(mSmallestSize, mLargestSize);
}
@Override
public void onReceive(Context context, Intent intent) {
Configuration config = context.getResources().getConfiguration();
if (mFontScale != config.fontScale || mDensity != config.densityDpi) {
Log.d(TAG, "Configuration changed");
killProcess();
}
}
public void register() {
mContext.registerReceiver(this, new IntentFilter(Intent.ACTION_CONFIGURATION_CHANGED));
mContext.getSystemService(DisplayManager.class)
.registerDisplayListener(this, new Handler(UiThreadHelper.getBackgroundLooper()));
}
@Override
public void onDisplayAdded(int displayId) { }
@Override
public void onDisplayRemoved(int displayId) { }
@Override
public void onDisplayChanged(int displayId) {
if (displayId != mDisplayId) {
return;
}
Display display = getDefaultDisplay(mContext);
display.getRealSize(mTmpPoint1);
if (!mRealSize.equals(mTmpPoint1) && !mRealSize.equals(mTmpPoint1.y, mTmpPoint1.x)) {
Log.d(TAG, String.format("Display size changed from %s to %s", mRealSize, mTmpPoint1));
killProcess();
return;
}
display.getCurrentSizeRange(mTmpPoint1, mTmpPoint2);
if (!mSmallestSize.equals(mTmpPoint1) || !mLargestSize.equals(mTmpPoint2)) {
Log.d(TAG, String.format("Available size changed from [%s, %s] to [%s, %s]",
mSmallestSize, mLargestSize, mTmpPoint1, mTmpPoint2));
killProcess();
}
}
private void killProcess() {
Log.d(TAG, "restarting launcher");
try {
mContext.unregisterReceiver(this);
mContext.getSystemService(DisplayManager.class).unregisterDisplayListener(this);
} catch (Exception e) {
// We are going to die anyway, ignore any error die to race condition in registering.
}
android.os.Process.killProcess(android.os.Process.myPid());
}
private Display getDefaultDisplay(Context context) {
return context.getSystemService(WindowManager.class).getDefaultDisplay();
}
}
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