那些遇到过的问题

活动<应用程序名称>已泄露最初绑定在此处的ServiceConnection <ServiceConnection名称> @ 438030a8

cat*_*gif 124 android serviceconnection

我正在开发我的第一款Android应用.我的应用程序中有三个活动,用户来回切换频繁.我还有一个远程服务,它处理一个telnet连接.应用程序需要绑定到此服务才能发送/接收telnet消息.

编辑 感谢BDLS提供的信息.我已根据您对使用bindService()作为独立函数或在startService()之间的区别的说明重新编写了我的代码,现在我只是在使用后退按钮之间循环时间歇性地获取泄漏错误消息活动.

我的连接活动有以下onCreate()和onDestroy():

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    /*
     * Initialize the ServiceConnection.  Note that this is the only place startService() is run.
     * It is also the only time bindService is run without dependency on connectStatus.
     */
    conn = new TelnetServiceConnection();
    //start the service which handles telnet
    Intent i = new Intent();
    i.setClassName( "com.wingedvictorydesign.LightfactoryRemote", "com.wingedvictorydesign.LightfactoryRemote.TelnetService" );
    startService(i);
    //bind to the service
    bindService(i, conn, 0);

    setContentView(R.layout.connect);
    setupConnectUI();

}//end OnCreate()

@Override
protected void onDestroy() {
    super.onDestroy();

    //unbind the service and null it out
    if (conn != null) {
        unbindService(conn);
        conn = null;
        }

    if(connectStatus == 0) {
        //stop the service
        Intent i = new Intent();
        i.setClassName( "com.wingedvictorydesign.LightfactoryRemote", "com.wingedvictorydesign.LightfactoryRemote.TelnetService" );
        stopService(i);
        Log.d("LightfactoryRemote", "Connect onDestroy() attempted to stop service");
        }

    Log.d("LightfactoryRemote", "Connect onDestroy()");
    }//end onDestroy()
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因此,服务在活动开始时启动,如果没有成功的telnet连接(connectStatus == 0),则在活动被销毁时停止.仅当成功建立连接时,其他活动才绑定到服务(connectStatus == 1,保存到共享首选项).这是他们的onResume()和onDestroy():

@Override
protected void onResume() {
    super.onResume();

    //retrieve the shared preferences file, and grab the connectionStatus out of it.
    SharedPreferences settings = getSharedPreferences(PREFS_NAME, MODE_WORLD_WRITEABLE);
    connectStatus = settings.getInt("connectStatus", 0);

    Log.d("LightfactoryRemote", "Focus onResume with " + connectStatus);

    //if a telnet connection is active, start the service and bind to it
    if (connectStatus == 1) {
        conn = new TelnetServiceConnection();
        Intent i = new Intent();
        i.setClassName("com.wingedvictorydesign.LightfactoryRemote", "com.wingedvictorydesign.LightfactoryRemote.TelnetService");
        bindService(i, conn, 0);
        //TODO write restore texview code
        }//end if
    }//end onResume

@Override
protected void onDestroy() {
    super.onDestroy();
    //unbind the service and null it out.
    if (conn != null) {
        Log.d("LightfactoryRemote", "Focus onDestroy() attempted to unbind service");
        unbindService(conn);
        conn = null;
        }
    Log.d("LightfactoryRemote", "Focus onDestroy()");
    }//end onDestroy()
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因此绑定发生在onResume()中,以便它将从连接活动中获取更改的状态,并且在onDestroy()函数中,如果需要,它将被解除绑定.

结束编辑

但是在切换活动时,我仍然会间歇性地获取内存泄漏错误消息"Activity已经泄漏了最初绑定的ServiceConnection @ 438030a8".我究竟做错了什么？

提前感谢任何提示或指示!

完整的错误消息(来自修订后的代码):

01-02 22:04:26.642: DEBUG/LightfactoryRemote(2024): Focus onStop()
01-02 22:04:26.642: DEBUG/LightfactoryRemote(2024): Focus onDestroy() attempted to unbind service
01-02 22:04:26.642: DEBUG/LightfactoryRemote(2024): Focus onDestroy()
01-02 22:04:26.672: ERROR/ActivityThread(2024): Activity com.wingedvictorydesign.LightfactoryRemote.LightfactoryRemote has leaked ServiceConnection com.wingedvictorydesign.LightfactoryRemote.LightfactoryRemote$TelnetServiceConnection@439e51e8 that was originally bound here
01-02 22:04:26.672: ERROR/ActivityThread(2024): android.app.ServiceConnectionLeaked: Activity com.wingedvictorydesign.LightfactoryRemote.LightfactoryRemote has leaked ServiceConnection com.wingedvictorydesign.LightfactoryRemote.LightfactoryRemote$TelnetServiceConnection@439e51e8 that was originally bound here
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.app.ActivityThread$PackageInfo$ServiceDispatcher.<init>(ActivityThread.java:927)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.app.ActivityThread$PackageInfo.getServiceDispatcher(ActivityThread.java:822)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.app.ApplicationContext.bindService(ApplicationContext.java:842)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.content.ContextWrapper.bindService(ContextWrapper.java:319)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at com.wingedvictorydesign.LightfactoryRemote.LightfactoryRemote.onResume(LightfactoryRemote.java:102)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1225)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.app.Activity.performResume(Activity.java:3559)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2838)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2866)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2420)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.app.ActivityThread.access$2100(ActivityThread.java:116)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1794)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.os.Looper.loop(Looper.java:123)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at android.app.ActivityThread.main(ActivityThread.java:4203)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at java.lang.reflect.Method.invokeNative(Native Method)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at java.lang.reflect.Method.invoke(Method.java:521)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:791)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:549)
01-02 22:04:26.672: ERROR/ActivityThread(2024):     at dalvik.system.NativeStart.main(Native Method)
01-02 22:04:26.692: WARN/ActivityManager(558): Unbind failed: could not find connection for android.os.BinderProxy@43c509a8
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编辑第二个
感谢再次bdls为您的建议.我按照你的建议做了,并为服务添加了一个onUnBind()覆盖.onUnBind()实际上只在所有客户端与服务断开连接时触发,但当我点击主页按钮时,它会执行,然后弹出错误消息!这对我来说没有意义,因为所有客户端都已从服务中解除绑定,那么如何破坏serviceConnection？看看这个:

01-03 19:38:30.837: DEBUG/LightfactoryRemote(1118): Focus onPause()1
01-03 19:38:31.577: WARN/IInputConnectionWrapper(1118): showStatusIcon on inactive InputConnection
01-03 19:38:31.587: DEBUG/LightfactoryRemote(1118): Focus onStop()
01-03 19:38:31.600: DEBUG/LightfactoryRemote(1118): Focus onDestroy() attempted to unbind service
01-03 19:38:31.607: DEBUG/LightfactoryRemote(1118): Focus onDestroy()
01-03 19:38:31.677: DEBUG/LightfactoryRemote(1125): TelnetService onUnBind()
01-03 19:38:31.727: ERROR/ActivityThread(1118): Activity com.wingedvictorydesign.LightfactoryRemote.LightfactoryRemote has leaked ServiceConnection com.wingedvictorydesign.LightfactoryRemote.LightfactoryRemote$TelnetServiceConnection@435baeb0 that was originally bound here
01-03 19:38:31.727: ERROR/ActivityThread(1118): android.app.ServiceConnectionLeaked: Activity com.wingedvictorydesign.LightfactoryRemote.LightfactoryRemote has leaked ServiceConnection com.wingedvictorydesign.LightfactoryRemote.LightfactoryRemote$TelnetServiceConnection@435baeb0 that was originally bound here
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.app.ActivityThread$PackageInfo$ServiceDispatcher.<init>(ActivityThread.java:886)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.app.ActivityThread$PackageInfo.getServiceDispatcher(ActivityThread.java:781)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.app.ApplicationContext.bindService(ApplicationContext.java:820)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.content.ContextWrapper.bindService(ContextWrapper.java:307)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at com.wingedvictorydesign.LightfactoryRemote.LightfactoryRemote.onResume(LightfactoryRemote.java:102)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1225)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.app.Activity.performResume(Activity.java:3530)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2619)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2647)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2287)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.app.ActivityThread.access$1800(ActivityThread.java:112)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1692)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.os.Handler.dispatchMessage(Handler.java:99)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.os.Looper.loop(Looper.java:123)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at android.app.ActivityThread.main(ActivityThread.java:3948)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at java.lang.reflect.Method.invokeNative(Native Method)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at java.lang.reflect.Method.invoke(Method.java:521)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
01-03 19:38:31.727: ERROR/ActivityThread(1118):     at dalvik.system.NativeStart.main(Native Method)
01-03 19:38:31.777: WARN/ActivityManager(564): Unbind failed: could not find connection for android.os.BinderProxy@4370f8a8
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我认为它可能就像你说的那样,当调用unbindService()时,对服务的绑定并不完整,但是我尝试在服务上调用一个方法,因为我支持每个活动以验证绑定是否完整,并且他们都很好.

一般来说,这种行为似乎与我在每项活动中停留的时间无关.然而,一旦第一个活动泄漏了它的serviceConnection,它们都会在我之后重新执行它们.

另外一件事,如果我在Dev Tools中打开"立即销毁活动",它会阻止此错误.

有任何想法吗？

bdl*_*dls 55

你没有提供任何代码LightFactoryRemote,所以这只是一个假设,但如果你bindService自己使用这个方法,它看起来就像你会遇到的那种问题.

为确保服务保持运行,即使在启动它的onDestroy方法调用了其方法之后,您也应该首先使用startService.

用于startService状态的android文档:

使用startService()会覆盖由bindService(Intent,ServiceConnection,int)管理的默认服务生命周期:它要求服务保持运行,直到调用stopService(Intent),无论是否有任何客户端连接到它.

而对于bindService:

只要存在调用上下文,系统就会认为该服务是必需的.例如,如果此Context是一个已停止的Activity,则在恢复Activity之前,不需要该服务继续运行.

所以发生的事情是绑定(并因此启动)服务的活动已经停止,因此系统认为不再需要服务并导致该错误(然后可能会停止服务).

例

在此示例中,无论调用活动是否正在运行,服务都应保持运行.

ComponentName myService = startService(new Intent(this, myClass.class));
bindService(new Intent(this, myClass.class), myServiceConn, BIND_AUTO_CREATE);
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第一行启动服务,第二行将其绑定到活动.

  • @ opc0de,当你两次调用startService()时,不会创建另一个服务.服务本质上是逻辑上的单身人士.无论你启动它多少次,只运行一个服务. (16认同)
  • 在音乐播放器中继续提供服务的解决方案是什么？ (2认同)

Mos*_*ami 38

您可以使用:

@Override
public void onDestroy() {
    super.onDestroy();

    if (mServiceConn != null) {
        unbindService(mServiceConn);
    }
}
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Nic*_*ick 30

你绑定onResume但不绑定onDestroy.您应该执行取消绑定onPause,以便始终匹配绑定/取消绑定对.您的间歇性错误将是您的活动暂停但未被销毁的地方,然后再次恢复.

pie*_*fou 13

您应该只需要取消绑定服务onDestroy().然后,警告就会响起.

看到这里.

正如Activity文档试图解释的那样,您将使用三个主要的绑定/解除绑定分组:onCreate()和onDestroy(),onStart()和onStop(),以及onResume()和onPause().

  • 因为你可能有经验onDestroy几乎从来没有**从操作系统调用 (6认同)

bdl*_*dls 10

你提到用户很快就在Activities之间切换.unbindService在服务连接建立之前,你是否正在打电话？这可能会导致无法解除绑定,然后泄漏绑定.

不完全确定你如何处理这个...也许当onServiceConnected被调用时你可以调用,unbindService如果onDestroy已经被调用.不确定这是否会奏效.

如果您还没有,可以在服务中添加onUnbind方法.通过这种方式,您可以准确地看到类与其解除绑定的时间,并且可能有助于调试.

@Override
public boolean onUnbind(Intent intent) {
    Log.d(this.getClass().getName(), "UNBIND");
    return true;
}
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