Android の Service のさんぷる

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">


    <Button
        android:id="@+id/start_service"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Start Service" />

    <Button
        android:id="@+id/stop_service"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/start_service"
        android:text="Stop Service" />

    <Button
        android:id="@+id/bind_service"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/stop_service"
        android:text="Bind Service" />

    <Button
        android:id="@+id/unbind_service"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/bind_service"
        android:text="Unbind Service" />

    <Button
        android:id="@+id/start_vibrator"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/unbind_service"
        android:enabled="false"
        android:text="ヴァイブレーションスタート" />

    <Button
        android:id="@+id/stop_vibrator"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/unbind_service"
        android:layout_toRightOf="@id/start_vibrator"
        android:enabled="false"
        android:text="ヴァイブレーションストップ" />
</RelativeLayout>

MainActivity.java

package jp.ac.it_college.std.nakasone.servicetest;

import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.view.View;


public class MainActivity extends Activity {
    private MyService service;

    private ServiceConnection serviceConnection = new ServiceConnection() {
        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            MyService.LocalBinder binder = (MyService.LocalBinder) service;
            MainActivity.this.service = binder.getService();
        }

        @Override
        public void onServiceDisconnected(ComponentName name) {
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    protected void onStart() {
        super.onStart();
        View.OnClickListener listener = new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                switch (v.getId()) {
                    case R.id.start_service:
                        startVibrator();
                        break;
                    case R.id.stop_service:
                        stopVibrator();
                        break;
                    case R.id.bind_service:
                        bind();
                        findViewById(R.id.start_vibrator).setEnabled(true);
                        findViewById(R.id.stop_vibrator).setEnabled(true);
                        break;
                    case R.id.unbind_service:
                        unbind();
                        findViewById(R.id.start_vibrator).setEnabled(false);
                        findViewById(R.id.stop_vibrator).setEnabled(false);
                        break;
                    case R.id.start_vibrator:
                        service.startVibrator();
                        break;
                    case R.id.stop_vibrator:
                        service.stopVibrator();
                        break;
                }
            }
        };

        findViewById(R.id.start_service).setOnClickListener(listener);
        findViewById(R.id.stop_service).setOnClickListener(listener);
        findViewById(R.id.bind_service).setOnClickListener(listener);
        findViewById(R.id.unbind_service).setOnClickListener(listener);
        findViewById(R.id.start_vibrator).setOnClickListener(listener);
        findViewById(R.id.stop_vibrator).setOnClickListener(listener);
    }

    private void startVibrator() {
        startService(new Intent(this, MyService.class));
    }

    private void stopVibrator() {
        stopService(new Intent(this, MyService.class));
    }

    private void bind() {
        Intent intent = new Intent(this, MyService.class);
        bindService(intent, serviceConnection, BIND_AUTO_CREATE);
    }

    private void unbind() {
        unbindService(serviceConnection);
    }
}

MyService.java

package jp.ac.it_college.std.nakasone.servicetest;

import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.os.Vibrator;
import android.util.Log;

public class MyService extends Service {
    private static final String TAG = "MyService";
    private static final long[] PATTERN = {50, 100, 50, 200, 50, 300, 50, 200, 50, 100};
    private Vibrator vibrator;
    private IBinder binder = new LocalBinder();

    public class LocalBinder extends Binder {
        MyService getService() {
            return MyService.this;
        }
    }

    @Override
    public void onCreate() {
        super.onCreate();
        initVibrator();
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        startVibrator();
        return super.onStartCommand(intent, flags, startId);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        stopVibrator();
    }

    @Override
    public IBinder onBind(Intent intent) {
        return binder;
    }

    private void initVibrator() {
        try {
            vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
        } catch (ClassCastException e) {
            Log.wtf(TAG, e);
            throw e;
        }
    }

    public void startVibrator() {
        if (vibrator.hasVibrator()) {
            vibrator.vibrate(PATTERN, 0);
        }
    }

    public void stopVibrator() {
        if (vibrator.hasVibrator()) {
            vibrator.cancel();
        }
    }
}