java – Greenrobot EventBus无法发送事件
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我正在使用EventBus从长时间运行的线程传递到更新其UI的Fragments.这个长时间运行的线程基本上是在监听网络活动,解析它并将事件放在总线上.我有2个片段设置接收事件.
当我从Fragments的onEvent方法更新Fragments的UI(textview)时出现错误.如何从单独的线程更新片段中的UI？
这是我的片段代码和我看到的logcat输出…
logcat的：
10-15 02:19:44.637: I/System.out(682): debugger has settled (1440)
10-15 02:19:45.021: V/BRRT(682): start thread
10-15 02:19:45.021: V/BRRT(682): past start thread
10-15 02:19:45.031: V/TEST(682): running thread...
10-15 02:19:45.121: D/Event(682): No subscribers registered for event class com.broadreach.radiotester.io.ExpeditionEvent
10-15 02:19:45.121: D/Event(682): No subscribers registered for event class de.greenrobot.event.NoSubscriberEvent
10-15 02:19:45.261: V/BRRT(682): OneUp event received: 204 : 32
10-15 02:19:45.271: W/ResourceType(682): No package identifier when getting value for resource number 0x00000000
10-15 02:19:45.351: E/Event(682): Could not dispatch event: class com.broadreach.radiotester.io.ExpeditionEvent to subscribing class class com.broadreach.radiotester.screens.OneUpScreen
10-15 02:19:45.351: E/Event(682): android.content.res.Resources$NotFoundException: String resource ID #0x0
10-15 02:19:45.351: E/Event(682): at android.content.res.Resources.getText(Resources.java:247)
10-15 02:19:45.351: E/Event(682): at android.widget.TextView.setText(TextView.java:3428)
10-15 02:19:45.351: E/Event(682): at com.broadreach.radiotester.screens.OneUpScreen.onEvent(OneUpScreen.java:47)
10-15 02:19:45.351: E/Event(682): at java.lang.reflect.Method.invokeNative(Native Method)
10-15 02:19:45.351: E/Event(682): at java.lang.reflect.Method.invoke(Method.java:511)
10-15 02:19:45.351: E/Event(682): at de.greenrobot.event.EventBus.invokeSubscriber(EventBus.java:569)
10-15 02:19:45.351: E/Event(682): at de.greenrobot.event.EventBus.postToSubscription(EventBus.java:500)
10-15 02:19:45.351: E/Event(682): at de.greenrobot.event.EventBus.subscribe(EventBus.java:288)
10-15 02:19:45.351: E/Event(682): at de.greenrobot.event.EventBus.register(EventBus.java:189)
10-15 02:19:45.351: E/Event(682): at de.greenrobot.event.EventBus.registerSticky(EventBus.java:166)
10-15 02:19:45.351: E/Event(682): at com.broadreach.radiotester.screens.OneUpScreen.onResume(OneUpScreen.java:33)
10-15 02:19:45.351: E/Event(682): at android.support.v4.app.Fragment.performResume(Fragment.java:1547)
10-15 02:19:45.351: E/Event(682): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:978)
10-15 02:19:45.351: E/Event(682): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1121)
10-15 02:19:45.351: E/Event(682): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
10-15 02:19:45.351: E/Event(682): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1484)
10-15 02:19:45.351: E/Event(682): at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:482)
10-15 02:19:45.351: E/Event(682): at android.support.v4.app.FragmentStatePagerAdapter.finishUpdate(FragmentStatePagerAdapter.java:163)
10-15 02:19:45.351: E/Event(682): at android.support.v4.view.ViewPager.populate(ViewPager.java:1073)
10-15 02:19:45.351: E/Event(682): at android.support.v4.view.ViewPager.populate(ViewPager.java:919)
10-15 02:19:45.351: E/Event(682): at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1441)
10-15 02:19:45.351: E/Event(682): at android.view.View.measure(View.java:12603)
10-15 02:19:45.351: E/Event(682): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4677)
10-15 02:19:45.351: E/Event(682): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
10-15 02:19:45.351: E/Event(682): at android.view.View.measure(View.java:12603)
10-15 02:19:45.351: E/Event(682): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4677)
10-15 02:19:45.351: E/Event(682): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1369)
10-15 02:19:45.351: E/Event(682): at android.widget.LinearLayout.measureVertical(LinearLayout.java:660)
10-15 02:19:45.351: E/Event(682): at android.widget.LinearLayout.onMeasure(LinearLayout.java:553)
10-15 02:19:45.351: E/Event(682): at android.view.View.measure(View.java:12603)
10-15 02:19:45.351: E/Event(682): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4677)
10-15 02:19:45.351: E/Event(682): at android.widget.FrameLayout.onMeasure(FrameLayout.java:293)
10-15 02:19:45.351: E/Event(682): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2072)
10-15 02:19:45.351: E/Event(682): at android.view.View.measure(View.java:12603)
10-15 02:19:45.351: E/Event(682): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1044)
10-15 02:19:45.351: E/Event(682): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java:2418)
10-15 02:19:45.351: E/Event(682): at android.os.Handler.dispatchMessage(Handler.java:99)
10-15 02:19:45.351: E/Event(682): at android.os.Looper.loop(Looper.java:137)
10-15 02:19:45.351: E/Event(682): at android.app.ActivityThread.main(ActivityThread.java:4340)
10-15 02:19:45.351: E/Event(682): at java.lang.reflect.Method.invokeNative(Native Method)
10-15 02:19:45.351: E/Event(682): at java.lang.reflect.Method.invoke(Method.java:511)
10-15 02:19:45.351: E/Event(682): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
10-15 02:19:45.351: E/Event(682): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
10-15 02:19:45.351: E/Event(682): at dalvik.system.NativeStart.main(Native Method)
10-15 02:19:45.351: D/Event(682): No subscribers registered for event class de.greenrobot.event.SubscriberExceptionEvent
10-15 02:19:45.551: V/BRRT(682): FourUp event received: 204 : 32
10-15 02:19:45.561: W/ResourceType(682): No package identifier when getting value for resource number 0x00000000
这是一个碎片(它们看起来一样)：
public class OneUpScreen extends ScreenFragment {
private Button name;
private TextView c00Title, c00Data;
//DEBUG
public String title;
//DEBUG
private int counter = 0;
//for logging and convenience
private static final String TAG = "BRRT";
@Override
public void onResume(){
super.onResume();
EventBus.getDefault().registerSticky(this);
}
@Override
public void onPause(){
EventBus.getDefault().unregister(this);
super.onDestroy();
}
//process the bus messaging
public void onEvent(ExpeditionEvent event){
Log.v(TAG, "OneUp event received: " + event.getEventId() + " : " + event.getEventScreenValue());
c00Data = (TextView) getView().findViewById(R.id.c00Data);
c00Data.setText(counter);
counter++;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.one_up_screen_layout, container, false);
name = (Button) v.findViewById(R.id.lblTitle);
c00Title = (TextView) v.findViewById(R.id.c00Title);
c00Data = (TextView) v.findViewById(R.id.c00Data);
Bundle bundle = this.getArguments();
//initial set up of the text on the screen
//null check
name.setText((bundle.getString("name") == null) ? "error" : bundle.getString("name"));
c00Title.setText((bundle.getString("c00Title") == null) ? "error" : bundle.getString("c00Title"));
title = bundle.getString("c00Title");
return v;
}
public OneUpScreen(){
}
public static OneUpScreen newInstance() {
OneUpScreen frag = new OneUpScreen();
return frag;
}
//attach the config for this instance.
@Override
public void setConfig(ScreenConfig sc){
//set up the data to paint the screen for the first time
Bundle b = new Bundle();
//now we have to parse some stuff into a bundle and send the bundle to the fragment
b.putString("name", sc.getName());
b.putString("c00Title", sc.getEvents().get(0).getCleanName());
b.putInt("c00Data", sc.getEvents().get(0).getEventID());
//pass it along
this.setArguments(b);
}
@Override
public void update(SparseArray<String> sensorDataMap) {
Log.v(TAG, "OneUp Update called: " + counter);
counter++;
}
}
onEvent方法是我在这里看的地方.如果您在日志中注意到,则会调用该方法.但是,我无法点击它内部的textView.最初我只是对onCreate()方法中的textview进行了引用.但是我看到了一个例子,你在事件处理中再次查看它,所以我转向那个,没有运气.
如果我拿出：
c00Data.setText(counter);
那么外翻效果很好.
我在这里错过了什么？
解决方法:
好的,对于后来这里的人来说,这就是我解决这个问题的方法……
事实证明,我看到的关键错误不是与事件相关的错误,而是与资源相关的错误.
10-15 02:19:45.271: W/ResourceType(682): No package identifier when getting value for resource number 0x00000000
我在其他地方看了SO并发现了这个：
No package identifier when getting value for resource number
然后我回到我的代码并重写TextView.setText()调用看起来不同.
旧方式(计数器是一个int)：
c00Data.setText(counter);
新方法：
c00Data.setText(""+counter);
这样做了.我呐喊.
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