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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 static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
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.util.Log;
import java.util.function.Consumer;
/**
* {@link BroadcastReceiver} which watches configuration changes and
* notifies the callback in case changes which affect the device profile occur.
*/
public class ConfigMonitor extends BroadcastReceiver implements
DefaultDisplay.DisplayInfoChangeListener {
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;
private Consumer<Context> mCallback;
public ConfigMonitor(Context context, Consumer<Context> callback) {
mContext = context;
Configuration config = context.getResources().getConfiguration();
mFontScale = config.fontScale;
mDensity = config.densityDpi;
DefaultDisplay display = DefaultDisplay.INSTANCE.get(context);
display.addChangeListener(this);
DefaultDisplay.Info displayInfo = display.getInfo();
mDisplayId = displayInfo.id;
mRealSize = new Point(displayInfo.realSize);
mSmallestSize = new Point(displayInfo.smallestSize);
mLargestSize = new Point(displayInfo.largestSize);
mCallback = callback;
// Listen for configuration change
mContext.registerReceiver(this, new IntentFilter(Intent.ACTION_CONFIGURATION_CHANGED));
}
@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.");
notifyChange();
}
}
@Override
public void onDisplayInfoChanged(DefaultDisplay.Info info, int flags) {
if (info.id != mDisplayId) {
return;
}
mTmpPoint1.set(info.realSize.x, info.realSize.y);
if (!mRealSize.equals(mTmpPoint1) && !mRealSize.equals(mTmpPoint1.y, mTmpPoint1.x)) {
Log.d(TAG, String.format("Display size changed from %s to %s", mRealSize, mTmpPoint1));
notifyChange();
return;
}
mTmpPoint1.set(info.smallestSize.x, info.smallestSize.y);
mTmpPoint2.set(info.largestSize.x, info.largestSize.y);
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));
notifyChange();
}
}
private synchronized void notifyChange() {
if (mCallback != null) {
Consumer<Context> callback = mCallback;
mCallback = null;
MAIN_EXECUTOR.execute(() -> callback.accept(mContext));
}
}
public void unregister() {
try {
mContext.unregisterReceiver(this);
DefaultDisplay display = DefaultDisplay.INSTANCE.get(mContext);
display.removeChangeListener(this);
} catch (Exception e) {
Log.e(TAG, "Failed to unregister config monitor", e);
}
}
}
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