Introduce CommunalSourcePrimer.

    <!-- Whether the communal service should be enabled -->

    <bool name="config_communalServiceEnabled">false</bool>

    <!-- Component name of communal source service -->

    <string name="config_communalSourceComponent" translatable="false">@null</string>

</resources>

/*

 * 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 com.android.systemui.communal.service;

import android.content.ComponentName;

import android.content.Context;

import android.content.Intent;

import android.content.ServiceConnection;

import android.os.IBinder;

import android.util.Log;

import com.android.systemui.R;

import com.android.systemui.SystemUI;

import com.android.systemui.communal.CommunalSourceMonitor;

import com.android.systemui.dagger.SysUISingleton;

import com.android.systemui.dagger.qualifiers.Main;

import com.android.systemui.shared.communal.ICommunalSource;

import java.util.concurrent.Executor;

import javax.inject.Inject;

/**

 * The {@link CommunalSourcePrimer} is responsible for priming SystemUI with a pre-configured

 * Communal source. The SystemUI service binds to the component to retrieve the

 * {@link com.android.systemui.communal.CommunalSource}. {@link CommunalSourcePrimer} has no effect

 * if there is no pre-defined value.

 */

@SysUISingleton

public class CommunalSourcePrimer extends SystemUI {

    private static final String TAG = "CommunalSourcePrimer";

    private static final boolean DEBUG = false;

    private final Context mContext;

    private final Executor mMainExecutor;

    private final CommunalSourceMonitor mMonitor;

    private static final String ACTION_COMMUNAL_SOURCE = "android.intent.action.COMMUNAL_SOURCE";

    private final ServiceConnection mConnection = new ServiceConnection() {

        @Override

        public void onServiceConnected(ComponentName className, IBinder service) {

            final ICommunalSource source = ICommunalSource.Stub.asInterface(service);

            if (DEBUG) {

                Log.d(TAG, "onServiceConnected. source;" + source);

            }

            mMonitor.setSource(

                    source != null ? new CommunalSourceImpl(mMainExecutor, source) : null);

        }

        @Override

        public void onServiceDisconnected(ComponentName className) {

        }

    };

    @Inject

    public CommunalSourcePrimer(Context context, @Main Executor mainExecutor,

            CommunalSourceMonitor monitor) {

        super(context);

        mContext = context;

        mMainExecutor = mainExecutor;

        mMonitor = monitor;

    }

    @Override

    public void start() {

        if (DEBUG) {

            Log.d(TAG, "start");

        }

    }

    @Override

    protected void onBootCompleted() {

        super.onBootCompleted();

        final String serviceComponent = mContext.getString(R.string.config_communalSourceComponent);

        if (DEBUG) {

            Log.d(TAG, "onBootCompleted. communal source component:" + serviceComponent);

        }

        if (serviceComponent == null || serviceComponent.isEmpty()) {

            return;

        }

        final Intent intent = new Intent();

        intent.setAction(ACTION_COMMUNAL_SOURCE);

        intent.setComponent(ComponentName.unflattenFromString(serviceComponent));

        mContext.bindService(intent, mConnection, Context.BIND_AUTO_CREATE);

    }

}