android - Android中的ServiceConnectionLeaked

Question

我正在尝试在 Android 中使用 Service 进行一些基本的数据库操作，但由于某种原因，我收到了 Activity has leaked ServiceConnection 错误。我将在底部发布完整的 Logcat 读数。

我必须在多个 Activity 中使用相同的服务，所以我创建了一个父类(super class)来处理所有的服务任务。它看起来像这样:

private MyInterface child;

public void onCreate(Bundle savedInstanceState, MyInterface child){
    super.onCreate(savedInstanceState);

    doBindService();
}

public void onResume(){
    super.onResume();

    doBindService();
}

protected void onPause(){
    super.onPause();

    doUnbindService();
}

private boolean bound;
private boolean binding;

ServiceConnection Connection = new ServiceConnection(){

    //called when the service is connected
    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        Log.d(LOGTAG, "Bound to Service");
        bound = true;
        binding = false;
        toServiceMessenger = new Messenger(service);
        while(!commandsForService.isEmpty()){
            sendToService(commandsForService.poll());
        }
    }

    //called when the service is disconnected
    @Override
    public void onServiceDisconnected(ComponentName name) {
        Log.d(LOGTAG, "Unboud from Service");
        bound = false;
        binding = false;
        toServiceMessenger = null;
    }
};

private boolean doBindService(){
    Log.d(LOGTAG, "Attempting to Bind to Service");
    if(!bound && !binding){
        binding = true;
        bindService(new Intent(this, global.FetchService.class), Connection, Context.BIND_AUTO_CREATE);
    }
    return bound;
}

private void doUnbindService(){
    Log.d(LOGTAG, "Attempting to Unbind from Service");
    if(bound && !binding){
        binding = true;
        unbindService(Connection);
    }
}

public void sendToService(Message msg){
    if(bound){
        sendMessageToService(msg);
    }
    else{
        commandsForService.add(msg);
    }
}

private void sendMessageToService(Message msg){
    if(bound){
        msg.replyTo = fromServiceMessenger;
        try {
            toServiceMessenger.send(msg);
        } catch (RemoteException e) {
            Log.d(LOGTAG, "RemoteException communicating with service");
        }
    }
    else{
        Log.d(LOGTAG, "Error: toServiceMessenger null while bound");
    }
}

这个想法是子 Activity 永远不需要担心是否连接到服务，父类(super class)应该负责将数据获取到服务并返回给子 Activity 。

logcat在onCreate()中指向doBindService() --> bindService(new Intent(this, global.FetchService.class), Connection, Context.BIND_AUTO_CREATE);作为导致错误的行。但是，该服务仅在 Activity 运行且可见时间超过 15 秒后才会泄漏，因此我认为不应调用 onCreate()。

这是 Logcat:

09-02 09:25:40.635: E/ActivityThread(5963): Activity childActivity has leaked ServiceConnection superClass$1@42cb1b70 that was originally bound here
09-02 09:25:40.635: E/ActivityThread(5963): android.app.ServiceConnectionLeaked: Activity childActivity has leaked ServiceConnection superClass$1@42cb1b70 that was originally bound here
09-02 09:25:40.635: E/ActivityThread(5963):     at android.app.LoadedApk$ServiceDispatcher.<init>(LoadedApk.java:1055)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.app.LoadedApk.getServiceDispatcher(LoadedApk.java:949)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.app.ContextImpl.bindService(ContextImpl.java:1472)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.app.ContextImpl.bindService(ContextImpl.java:1464)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.content.ContextWrapper.bindService(ContextWrapper.java:394)
09-02 09:25:40.635: E/ActivityThread(5963):     at superClass.doBindService(FetchActivity.java:253)
09-02 09:25:40.635: E/ActivityThread(5963):     at superClass.onCreate(FetchActivity.java:61)
09-02 09:25:40.635: E/ActivityThread(5963):     at childActivity.onCreate(Showcase_Activity.java:37)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.app.Activity.performCreate(Activity.java:5066)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1101)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2311)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2391)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.app.ActivityThread.access$600(ActivityThread.java:151)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1335)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.os.Looper.loop(Looper.java:155)
09-02 09:25:40.635: E/ActivityThread(5963):     at android.app.ActivityThread.main(ActivityThread.java:5493)
09-02 09:25:40.635: E/ActivityThread(5963):     at java.lang.reflect.Method.invokeNative(Native Method)
09-02 09:25:40.635: E/ActivityThread(5963):     at java.lang.reflect.Method.invoke(Method.java:511)
09-02 09:25:40.635: E/ActivityThread(5963):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1028)
09-02 09:25:40.635: E/ActivityThread(5963):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:795)
09-02 09:25:40.635: E/ActivityThread(5963):     at dalvik.system.NativeStart.main(Native Method)

任何帮助将不胜感激。

Answer 1

当您在 onCreate() 中调用 doBindService() 时，您应该在 onDestroy 中添加 do UnbindService() ().

它对我有用。