3-AIII--Service绑定服务基于接口调用方法

/**
 * 作者：张风捷特烈
 * 时间：2018/8/25 0025:11:09
 * 邮箱：1981462002@qq.com
 * 说明：服务方法接口
 */
public interface IMService {
    /**
     * 播放音乐
     */
    void playMusic();

    /**
     * 暂停音乐
     */
    void pauseMusic();

    /**
     * 继续播放音乐
     */
    void rePlayMusic();

}

public class MusicService extends Service {
    private static final String TAG = "MusicService";
    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return new MusicBinder();
    }
    
    private class MusicBinder extends Binder implements IMService {

        @Override
        public void playMusic() {
            Log.e(TAG, "playMusic: ");
        }

        @Override
        public void pauseMusic() {
            Log.e(TAG, "pauseMusic: ");

        }

        @Override
        public void rePlayMusic() {
            Log.e(TAG, "rePlayMusic: ");
        }
    }
}

public class MusicActivity extends Activity {

    @BindView(R.id.btn_music_play)
    Button mBtnMusicPlay;
    @BindView(R.id.btn_music_stop)
    Button mBtnMusicStop;
    @BindView(R.id.btn_music_continue)
    Button mBtnMusicContinue;
    private ServiceConnection mConn;
    private IMService mImservice;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_music);
        ButterKnife.bind(this);

        bindMusic();
    }

    private void bindMusic() {
        // [0]保证服务长期运行
        Intent intent = new Intent(this, MusicService.class);
        startService(intent);

        // [1]调用bindservice 目的是为了获取我们定义的中间人对象
        mConn = new ServiceConnection() {
            @Override // 当连接成功时候调用
            public void onServiceConnected(ComponentName name, IBinder service) {
                mImservice = (IMService) service;// 获取我们定义的中间人对象
            }

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

        // 连接MusicService 服务 获取我们定义的中间人对象
        bindService(intent, mConn, BIND_AUTO_CREATE);

    }


    @OnClick({R.id.btn_music_play, R.id.btn_music_stop, R.id.btn_music_continue})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.btn_music_play: // 播放音乐
                mImservice.playMusic();
                break;
            case R.id.btn_music_stop:// 暂停音乐
                mImservice.pauseMusic();
                break;
            case R.id.btn_music_continue:// 继续音乐
                mImservice.rePlayMusic();
                break;
        }
    }

    @Override
    protected void onDestroy() {
        // 当activity销毁的时候 取消绑定服务
        if (mConn != null) {
            unbindService(mConn);
        }
        super.onDestroy();
    }

}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

    <Button
        android:id="@+id/btn_music_play"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="音乐播放" />

    <Button
        android:id="@+id/btn_music_stop"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="音乐暂停" />

    <Button
        android:id="@+id/btn_music_continue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="音乐继续" />

</LinearLayout>