package com.android.launcher3.util;
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/**
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import android.content.BroadcastReceiver;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.content.res.Configuration;
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import android.graphics.Point;
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import android.hardware.display.DisplayManager;
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import android.hardware.display.DisplayManager.DisplayListener;
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import android.os.Handler;
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import android.util.Log;
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import android.view.Display;
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import android.view.WindowManager;
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import com.android.launcher3.MainThreadExecutor;
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import java.util.function.Consumer;
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/**
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* {@link BroadcastReceiver} which watches configuration changes and
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* notifies the callback in case changes which affect the device profile occur.
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*/
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public class ConfigMonitor extends BroadcastReceiver implements DisplayListener {
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private static final String TAG = "ConfigMonitor";
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private final Point mTmpPoint1 = new Point();
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private final Point mTmpPoint2 = new Point();
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private final Context mContext;
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private final float mFontScale;
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private final int mDensity;
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private final int mDisplayId;
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private final Point mRealSize;
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private final Point mSmallestSize, mLargestSize;
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private Consumer<Context> mCallback;
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public ConfigMonitor(Context context, Consumer<Context> callback) {
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mContext = context;
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Configuration config = context.getResources().getConfiguration();
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mFontScale = config.fontScale;
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mDensity = config.densityDpi;
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Display display = getDefaultDisplay(context);
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mDisplayId = display.getDisplayId();
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mRealSize = new Point();
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display.getRealSize(mRealSize);
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mSmallestSize = new Point();
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mLargestSize = new Point();
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display.getCurrentSizeRange(mSmallestSize, mLargestSize);
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mCallback = callback;
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// Listen for configuration change
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mContext.registerReceiver(this, new IntentFilter(Intent.ACTION_CONFIGURATION_CHANGED));
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// Listen for display manager change
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mContext.getSystemService(DisplayManager.class)
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.registerDisplayListener(this, new Handler(UiThreadHelper.getBackgroundLooper()));
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}
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@Override
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public void onReceive(Context context, Intent intent) {
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Configuration config = context.getResources().getConfiguration();
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if (mFontScale != config.fontScale || mDensity != config.densityDpi) {
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Log.d(TAG, "Configuration changed.");
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notifyChange();
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}
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}
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@Override
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public void onDisplayAdded(int displayId) { }
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@Override
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public void onDisplayRemoved(int displayId) { }
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@Override
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public void onDisplayChanged(int displayId) {
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if (displayId != mDisplayId) {
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return;
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}
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Display display = getDefaultDisplay(mContext);
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display.getRealSize(mTmpPoint1);
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if (!mRealSize.equals(mTmpPoint1) && !mRealSize.equals(mTmpPoint1.y, mTmpPoint1.x)) {
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Log.d(TAG, String.format("Display size changed from %s to %s", mRealSize, mTmpPoint1));
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notifyChange();
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return;
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}
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display.getCurrentSizeRange(mTmpPoint1, mTmpPoint2);
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if (!mSmallestSize.equals(mTmpPoint1) || !mLargestSize.equals(mTmpPoint2)) {
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Log.d(TAG, String.format("Available size changed from [%s, %s] to [%s, %s]",
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mSmallestSize, mLargestSize, mTmpPoint1, mTmpPoint2));
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notifyChange();
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}
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}
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private synchronized void notifyChange() {
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if (mCallback != null) {
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Consumer<Context> callback = mCallback;
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mCallback = null;
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new MainThreadExecutor().execute(() -> callback.accept(mContext));
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}
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}
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private Display getDefaultDisplay(Context context) {
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return context.getSystemService(WindowManager.class).getDefaultDisplay();
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}
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public void unregister() {
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try {
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mContext.unregisterReceiver(this);
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mContext.getSystemService(DisplayManager.class).unregisterDisplayListener(this);
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} catch (Exception e) {
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Log.e(TAG, "Failed to unregister config monitor", e);
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}
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}
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}
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