2-AIII--Service服务的绑定

public class BindTestService extends Service {
    private static final String TAG = "BindTestService";
    private TimerTask mRunTimerTask;

    @Override
    public void onCreate() {
        super.onCreate();
        Log.e(TAG, "onCreate: ");
    }
    
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.e(TAG, "onStartCommand: ");
        return super.onStartCommand(intent, flags, startId);
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        Log.e(TAG, "onBind: ");

        //使用计时器间隔打印时间
        Timer timer = new Timer();
        mRunTimerTask = new TimerTask() {
            @Override
            public void run() {
                System.out.println("scheduledExecutionTime:" + new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")
                        .format(scheduledExecutionTime()));
            }
        };
        //延迟3秒，2秒周期执行
        timer.schedule(mRunTimerTask, 3000L,2 * 1000L);
        Log.e(TAG, "计时器已开启");
        return new MyBinder();
    }

    @Override
    public boolean onUnbind(Intent intent) {
        Log.e(TAG, "onUnbind: 成功解绑");
        mRunTimerTask.cancel();
        Log.e(TAG, "计时器已取消");
        return super.onUnbind(intent);
    }
}

/**
 * 作者：张风捷特烈
 * 时间：2018/8/25 0025:11:09
 * 邮箱：1981462002@qq.com
 * 说明：Service的onBind方法返回一个IBinder对象
 * 该对象在是Service与Activity的连接人,在Activity可以获取该对象
 */
public class MyBinder extends Binder {
    public void methodInService() {
        System.out.println("我是服务里的方法");
    }
}

<service android:name=".bind.BindTestService"/>

public class BindActivity extends AppCompatActivity {

    @BindView(R.id.id_btn_bind)
    Button mIdBtnBind;
    @BindView(R.id.id_btn_unbind)
    Button mIdBtnUnbind;
    private ServiceConnection mConn;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_bind);
        ButterKnife.bind(this);
    }

    @OnClick({R.id.id_btn_bind, R.id.id_btn_unbind})
    public void onViewClicked(View view) {
        switch (view.getId()) {
            case R.id.id_btn_bind:
                // [0]启动服务
                Intent intent = new Intent(this, BindTestService.class);
                startService(intent);
                //[1]创建连接对象
                mConn = new ServiceConnection() {
                    // 当连接成功时候调用
                    @Override
                    public void onServiceConnected(ComponentName name, IBinder service) {
                        MyBinder binder = (MyBinder) service;
                        binder.methodInService();
                    }
                    // 当连接断开时候调用
                    @Override
                    public void onServiceDisconnected(ComponentName name) {

                    }
                };
                //[2]绑定服务启动
                bindService(intent, mConn, BIND_AUTO_CREATE);
                break;
            case R.id.id_btn_unbind:
                //[3]解绑服务启动
                    unbindService(mConn);
                break;
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".BindActivity">

    <Button
        android:id="@+id/id_btn_bind"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:text="绑定服务"
        app:layout_constraintEnd_toStartOf="@+id/id_btn_unbind"
        app:layout_constraintHorizontal_bias="0.5"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"/>

    <Button
        android:id="@+id/id_btn_unbind"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="解绑服务"
        app:layout_constraintStart_toEndOf="@+id/id_btn_bind"
        app:layout_constraintTop_toTopOf="@+id/id_btn_bind"/>

</android.support.constraint.ConstraintLayout>