android - 方向绑定(bind)服务的问题已更改

Question

我的应用程序将其信息存储在其服务中，并在 onCreate() 中绑定(bind)到它以验证加载信息的服务状态是什么。我虽然这会使改变方向变得容易，因为他们会在重新创建时从服务中恢复他的状态。但我的问题是，当调用onDestroy 时，它调用了unbindService，但是在onServiceDisconnect 之前调用了onCreate，这导致了一些问题。以下是我的一些方法:

关于 Activity :

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    MyService.log("Activity onCreate()");

    setContentView(R.layout.activity_layout);

    actionBar = getSupportActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
    actionBar.setDisplayShowTitleEnabled(false);
    drawerlayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawerlayout.setDrawerShadow(R.drawable.drawer_shadow, Gravity.LEFT);

    // activity sendo criada pela primeira vez e não por mudança de
    // orientação

    registerReceivers();
    // cancelaNotificacao(R.drawable.ic_launcher);

    Intent it = new Intent(this, MyService.class);
    if (!MyService.RUNNING) {
        startService(it);
    }

    if (!bindService(it, this, 0)) {
        mensagemErro("Erro!",
                "Não foi possível conectar ao service. Fechando app.");
        finish();
    }

}

@Override
protected void onDestroy() {
    super.onDestroy();
    unregisterReceivers();
    unbindService(this);

}

@Override
public void onServiceConnected(ComponentName name, IBinder binderservice) {
    MyService.log("Activity onServiceConnected");
    LocalBinder binder = (LocalBinder) binderservice;
    this.service = binder.getService();

    carregaRadio();

    if (MyService.bot != null && MyService.bot.isConnected()) {
        carregaChatdoService();
        selectTab(TITLE_TAB_CHAT);
    } else {
        carregaLogin();
        selectTab(TITLE_TAB_RADIO);
    }

}

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

关于服务:

public class LocalBinder extends Binder {
    public MyService getService() {
        // Return this instance of LocalService so clients can call public
        // methods
        return MyService.this;
    }
}

@Override
public IBinder onBind(Intent arg0) {
    log("Service Bind.");

    BOUND = true;
    return mBinder;

}

@Override
public boolean onUnbind(Intent intent) {
    log("Service Unbind.");

    BOUND = false;
    boolean stopserviceflag = true;

    // Se nem o bot do irc e nem o player estao ativos, o service pode parar
    // tambem
    if (bot != null && bot.isConnected()) {
        stopserviceflag = false;
    }

    if (playerStarted) {
        stopserviceflag = false;
    }

    if (stopserviceflag) {
        log("Service Stop.");
        stopSelf();
    }

    return super.onUnbind(intent);
}

我想我的 onServiceDisconnected 是否会在 onCreate 之前调用它会起作用，但真的不知道。

欢迎任何帮助。

Answer 1

在Activity onStart 中绑定(bind)服务，在onStop 中解除绑定(bind)服务。这将解决您在方向更改方面的问题。

@Override
protected void onStart() {
    super.onStart();
    // Bind to LocalService
    Intent intent = new Intent(this, YourService.class);
    bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
}

@Override
protected void onStop() {
    super.onStop();
    // Unbind from the service if already bound . 
    // mBound will be true if service connection is established when onServiceConnected is called
    if (mBound) {
        unbindService(mConnection);
        mBound = false;
    }
}

这将确保仅当 Activity 处于前台时，service 才与 Activity 绑定(bind)(对用户可见和交互)。