IntentService解析

public class MyIntentService extends IntentService {    public MyIntentService() {        // 传入工作线程的名称        super("MyIntentService");    }    @Override    protected void onHandleIntent(Intent intent) {        // 处理耗时任务    }}

<service    android:name=".MyIntentService"    android:exported="false"/>

Intent intent = new Intent(context, MyIntentService.class);context.startService(intent);

public abstract class IntentService extends Service {    private volatile Looper mServiceLooper;    private volatile ServiceHandler mServiceHandler;    private String mName;    private boolean mRedelivery;    private final class ServiceHandler extends Handler {        public ServiceHandler(Looper looper) {            super(looper);        }        @Override        public void handleMessage(Message msg) {            // onHandleIntent()方法在工作线程中执行，执行完后调用stopSelf方法关掉Service            onHandleIntent((Intent)msg.obj);            stopSelf(msg.arg1);        }    }    public IntentService(String name) {        super();        mName = name;    }    public void setIntentRedelivery(boolean enabled) {        mRedelivery = enabled;    }    @Override    public void onCreate() {        super.onCreate();        // 创建HandlerThread，这是一个工作线程，        // 因此使用IntentService，不用再额外创建子线程，就可以处理耗时任务        HandlerThread thread = new HandlerThread("IntentService[" + mName + "]");        thread.start();        // 获取工作线程的Looper        mServiceLooper = thread.getLooper();        // 将工作线程的Looper与Handler进行绑定，使其在工作线程中处理任务        mServiceHandler = new ServiceHandler(mServiceLooper);    }    @Override    public void onStart(@Nullable Intent intent, int startId) {        Message msg = mServiceHandler.obtainMessage();        msg.arg1 = startId;        msg.obj = intent;        // 将任务消息加入到工作队列中        mServiceHandler.sendMessage(msg);    }    @Override    public int onStartCommand(@Nullable Intent intent, int flags, int startId) {        onStart(intent, startId);        return mRedelivery ? START_REDELIVER_INTENT : START_NOT_STICKY;    }    @Override    public void onDestroy() {        mServiceLooper.quit();    }    @Override    @Nullable    public IBinder onBind(Intent intent) {        return null;    }    @WorkerThread    protected abstract void onHandleIntent(@Nullable Intent intent);}