org.lunci.lunci_waveform_example.ActivityServiceManagerBase.java Source code

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Here is the source code for org.lunci.lunci_waveform_example.ActivityServiceManagerBase.java

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/*
 *  Copyright (C) 2015 Lunci Hua
 *  *
 *  * 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 org.lunci.lunci_waveform_example;

import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.support.v4.app.FragmentActivity;
import android.util.Log;

import org.lunci.lunci_waveform_service.DataService;
import org.lunci.lunci_waveform_service.DataService.IDataService;

public abstract class ActivityServiceManagerBase extends FragmentActivity
        implements IActivityCommon, ServiceConnection {
    private static final String TAG = ActivityServiceManagerBase.class.getSimpleName();

    private IDataService mServiceFunction;
    // private Messenger mMessenger;
    private int mServiceKey;
    private Messenger mServiceMessenger;
    private boolean mBound = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (!mBound) {
            Intent intent = new Intent(this, DataService.class);
            bindService(intent, this, Context.BIND_AUTO_CREATE);
        }
    }

    @Override
    protected void onDestroy() {
        if (mBound) {
            unbindService(this);
            mBound = false;
        }
        super.onDestroy();
    }

    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        // mMessenger = new Messenger(getHandler());
        mBound = true;
        if (BuildConfig.DEBUG) {
            Log.i(TAG, "onServiceConnected, id=" + mServiceKey);
        }
        mServiceFunction = (IDataService) service;
        mServiceMessenger = new Messenger(mServiceFunction.getMessengerBinder());
    }

    @Override
    public void onServiceDisconnected(ComponentName name) {
        mServiceFunction = null;
        mServiceMessenger = null;
    }

    public IDataService getServiceFunction() {
        return mServiceFunction;
    }

    protected boolean sendMessageToService(Message msg) {
        if (mServiceMessenger == null) {
            Log.w(TAG, "service messenger is null");
            return false;
        }
        msg.replyTo = mServiceMessenger;
        if (msg.arg1 != 0)
            Log.e(TAG, "Message argument 1 is reserved for service assigned id. Do not use argument 1.");
        msg.arg1 = mServiceKey;
        try {
            mServiceMessenger.send(msg);
        } catch (RemoteException e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }
}