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ElizaChat / src / com.example.android.wearable.elizachat /

ResponderService.java

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/*
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 * Copyright (C) 2014 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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package com.example.android.wearable.elizachat;
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import android.app.Notification;
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import android.app.PendingIntent;
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import android.app.Service;
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import android.content.Intent;
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import android.graphics.BitmapFactory;
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import android.os.Bundle;
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import android.os.IBinder;
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import android.support.v4.app.NotificationCompat;
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import android.support.v4.app.RemoteInput;
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import android.support.v4.content.LocalBroadcastManager;
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import android.support.v4.app.NotificationManagerCompat;
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import android.text.TextUtils;
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import android.util.Log;
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/**
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 * A service that runs in the background and provides responses to the incoming messages from the
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 * wearable. It also keeps a record of the chat session history, which it can provide upon request.
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 */
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public class ResponderService extends Service {
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    public static final String ACTION_INCOMING = "com.example.android.wearable.elizachat.INCOMING";
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    public static final String ACTION_RESPONSE = "com.example.android.wearable.elizachat.REPLY";
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    public static final String EXTRA_REPLY = "reply";
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    private static final String TAG = "ResponderService";
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    private ElizaResponder mResponder;
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    private String mLastResponse = null;
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    private StringBuffer mCompleteConversation = new StringBuffer();
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    private LocalBroadcastManager mBroadcastManager;
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    @Override
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    public void onCreate() {
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        super.onCreate();
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        if (Log.isLoggable(TAG, Log.DEBUG)) {
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            Log.d(TAG, "Chat Service started");
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        }
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        mResponder = new ElizaResponder();
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        mBroadcastManager = LocalBroadcastManager.getInstance(this);
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        processIncoming(null);
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    }
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    @Override
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    public IBinder onBind(Intent intent) {
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        return null;
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    }
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    @Override
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    public int onStartCommand(Intent intent, int flags, int startId) {
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        if (null == intent || null == intent.getAction()) {
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            return Service.START_STICKY;
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        }
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        String action = intent.getAction();
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        if (action.equals(ACTION_RESPONSE)) {
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            Bundle remoteInputResults = RemoteInput.getResultsFromIntent(intent);
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            CharSequence replyMessage = "";
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            if (remoteInputResults != null) {
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                replyMessage = remoteInputResults.getCharSequence(EXTRA_REPLY);
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            }
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            processIncoming(replyMessage.toString());
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        } else if (action.equals(MainActivity.ACTION_GET_CONVERSATION)) {
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            broadcastMessage(mCompleteConversation.toString());
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        }
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        return Service.START_STICKY;
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    }
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    private void showNotification() {
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        if (Log.isLoggable(TAG, Log.DEBUG)) {
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            Log.d(TAG, "Sent: " + mLastResponse);
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        }
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        NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
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                .setContentTitle(getString(R.string.eliza))
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                .setContentText(mLastResponse)
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                .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.bg_eliza))
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                .setSmallIcon(R.drawable.bg_eliza)
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                .setPriority(NotificationCompat.PRIORITY_DEFAULT);
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        Intent intent = new Intent(ACTION_RESPONSE);
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        PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent,
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                PendingIntent.FLAG_ONE_SHOT | PendingIntent.FLAG_CANCEL_CURRENT);
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        Notification notification = builder
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                .extend(new NotificationCompat.WearableExtender()
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                        .addAction(new NotificationCompat.Action.Builder(
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                                R.drawable.ic_full_reply, getString(R.string.reply), pendingIntent)
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                                .addRemoteInput(new RemoteInput.Builder(EXTRA_REPLY)
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                                        .setLabel(getString(R.string.reply))
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                                        .build())
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                                .build()))
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                .build();
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        NotificationManagerCompat.from(this).notify(0, notification);
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    }
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    private void processIncoming(String text) {
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        if (Log.isLoggable(TAG, Log.DEBUG)) {
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            Log.d(TAG, "Received: " + text);
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        }
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        mLastResponse = mResponder.elzTalk(text);
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        String line = TextUtils.isEmpty(text) ? mLastResponse : text + "\n" + mLastResponse;
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        // Send a new line of conversation to update the Activity, unless the incoming text was
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        // empty.
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        if (!TextUtils.isEmpty(text)) {
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            broadcastMessage(line);
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        }
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        NotificationManagerCompat.from(this).cancelAll();
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        showNotification();
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        mCompleteConversation.append("\n" + line);
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    }
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    private void broadcastMessage(String message) {
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        Intent intent = new Intent(MainActivity.ACTION_NOTIFY);
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        intent.putExtra(MainActivity.EXTRA_MESSAGE, message);
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        mBroadcastManager.sendBroadcast(intent);
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    }
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    @Override
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    public void onDestroy() {
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        if (Log.isLoggable(TAG, Log.DEBUG)) {
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            Log.d(TAG, "Chat Service stopped");
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        }
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        NotificationManagerCompat.from(this).cancel(0);
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        mBroadcastManager = null;
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        super.onDestroy();
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    }
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}
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