*通过以下操作解决:*
我通过更改Activity的onDestroy()
和ServiceConnection::onServiceDisconnected()
方法来解决了这个问题。
我添加了一个布尔变量boundToService
,用于检查是否已经连接到名为Service的服务。
ServiceConnection如下:
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
myService = ((EventService.MyBinder) service).getService();
}
public void onServiceDisconnected(ComponentName name) {
// TODO Auto-generated method stub
Log.i(getPackageName(), "ServiceConnection::onServiceDisconnected() called");
boundToService = false;
}
};
还有onDestroy()
方法:
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
Log.e(getPackageName(), "Destroying Activity");
if (boundToService && mConnection != null) {
doUnbindService();
}
}
以下是在Activity中进行绑定和解绑的方法:
public void doBindService() {
bindService(new Intent(this, EventService.class), mConnection,
Context.BIND_AUTO_CREATE);
boundToService = true;
}
public void doUnbindService() {
unbindService(mConnection);
boundToService = false;
}
如Guillaume所说,首先调用super.onDestroy()
是必须的。
*解决结束*
我有一个前台服务Foreground Service
来轮询GPS数据,而MapActivity
每3秒请求一次该数据。当MapActivity
的onDestroy()
被调用时,我会收到以下LogCat错误:
06-11 21:26:35.591: D/CLIPBOARD(14801): Hide Clipboard dialog at Starting input: finished by someone else... !
06-11 21:26:44.451: D/dalvikvm(14801): Debugger has detached; object registry had 1371 entries
06-11 21:26:44.451: D/AndroidRuntime(14801): Shutting down VM
06-11 21:26:44.456: W/dalvikvm(14801): threadid=1: thread exiting with uncaught exception (group=0x40c4b1f8)
06-11 21:26:44.476: E/AndroidRuntime(14801): FATAL EXCEPTION: main
06-11 21:26:44.476: E/AndroidRuntime(14801): java.lang.RuntimeException: Unable to destroy activity {com.project4.mtl/com.project4.mtl.EventActivity}: java.lang.IllegalArgumentException: Service not registered: com.project4.mtl.EventActivity$1@416179d8
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3124)
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3142)
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.app.ActivityThread.access$1200(ActivityThread.java:127)
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1192)
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.os.Handler.dispatchMessage(Handler.java:99)
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.os.Looper.loop(Looper.java:137)
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.app.ActivityThread.main(ActivityThread.java:4507)
06-11 21:26:44.476: E/AndroidRuntime(14801): at java.lang.reflect.Method.invokeNative(Native Method)
06-11 21:26:44.476: E/AndroidRuntime(14801): at java.lang.reflect.Method.invoke(Method.java:511)
06-11 21:26:44.476: E/AndroidRuntime(14801): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:790)
06-11 21:26:44.476: E/AndroidRuntime(14801): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
06-11 21:26:44.476: E/AndroidRuntime(14801): at dalvik.system.NativeStart.main(Native Method)
06-11 21:26:44.476: E/AndroidRuntime(14801): Caused by: java.lang.IllegalArgumentException: Service not registered: com.project4.mtl.EventActivity$1@416179d8
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.app.LoadedApk.forgetServiceDispatcher(LoadedApk.java:888)
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.app.ContextImpl.unbindService(ContextImpl.java:1211)
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.content.ContextWrapper.unbindService(ContextWrapper.java:375)
06-11 21:26:44.476: E/AndroidRuntime(14801): at com.project4.mtl.EventActivity.onDestroy(EventActivity.java:175)
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.app.Activity.performDestroy(Activity.java:4629)
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1082)
06-11 21:26:44.476: E/AndroidRuntime(14801): at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3111)
06-11 21:26:44.476: E/AndroidRuntime(14801): ... 11 more`
当然,我的程序在大约175行周围引发了异常的代码:
@Override
protected void onDestroy() {
// TODO Auto-generated method stub
unbindService(mConnection);
super.onDestroy();
}
如果你需要更多的代码片段,请告诉我。*编辑*
这是ServiceConnection的代码:
public void doBindService() {
//ComponentName service = startService(new Intent(this,
// EventService.class));
bindService(new Intent(this, EventService.class), mConnection,
Context.BIND_AUTO_CREATE);
}
mConnection
是 ServiceConnection 类型:
private ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder service) {
myService = ((EventService.MyBinder) service).getService();
}
public void onServiceDisconnected(ComponentName name) {
// TODO Auto-generated method stub
}
};
super.onDestroy();
。 - Guillaume