FeedBack FeedBack - 23 days ago 6
Android Question

How to use EventBus library in android

I want develop android appliacation for one site, in this application i want use

oKHttp v3
, and
EventBus v3
. eventbus library source link : LINK.

I write below codes, but when running application, show me FC error!

okHttp_Page(main activity) codes:

public class okHTTP_Page extends AppCompatActivity {

private RecyclerView recycler;
private okHTTP_adapter adaper;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.ok_http__page);
EventBus.getDefault().register(this);

recycler = (RecyclerView) findViewById(R.id.okHTTP_recycler);
recycler.setHasFixedSize(true);
recycler.setLayoutManager(new LinearLayoutManager(this));

okHTTP_info info = new okHTTP_info();
info.getOkHTTP_info(this);

adaper = new okHTTP_adapter(this);
recycler.setAdapter(adaper);

}
}


okHttp_info(AsyncTask class) codes:

public class okHTTP_info {
private Context mContext;

public void getOkHTTP_info(Context context) {
mContext = context;
new getInfo().execute(serverIP.getIP());
}

private class getInfo extends AsyncTask<String, Void, String> {
EventBus bus = EventBus.getDefault();
private String ou_response;
private List<okHTTP_dataProvider> infoModels;

@Override
protected void onPreExecute() {
CustomProcessDialog.createAndShow(mContext);
infoModels = new ArrayList<>();
}

@Override
protected String doInBackground(String... params) {
OkHttpClient client = new OkHttpClient();

RequestBody requestBody = new MultipartBody.Builder()
.addFormDataPart("test", "2")
.addFormDataPart("posts", params[0])
.build();

Request request = new Request.Builder()
.url(serverIP.getIP())
.post(requestBody)
.build();

Response response;
try {
response = client.newCall(request).execute();
ou_response = response.body().string();
response.body().close();
if (ou_response != null) {
try {
JSONObject postObj = new JSONObject(ou_response);
JSONArray postsArray = postObj.getJSONArray("posts");
infoModels = new ArrayList<>();

for (int i = 0; i < postsArray.length(); i++) {
JSONObject postObject = postsArray.getJSONObject(i);
int id = postObject.getInt("id");
String title = postObject.getString("title");
Log.d("Data", "Post id: " + id);
Log.d("Data", "Post title: " + title);

//Use the title and id as per your requirement
infoModels.add(new okHTTP_dataProvider(
postObject.getString("title"),
postObject.getInt("id")));
}
} catch (JSONException e) {
e.printStackTrace();
}
}
} catch (IOException e) {
e.printStackTrace();
}
return ou_response;
}

@Override
protected void onPostExecute(String result) {
CustomProcessDialog.dissmis();
if (result != null) {
bus.post(infoModels);
}
}
}
}


LogCat errors:


04-16 16:04:34.780 20445-20445/com.tellfa.okhttpproject
E/AndroidRuntime: FATAL EXCEPTION: main java.lang.RuntimeException:
Unable to start activity
ComponentInfo{com.tellfa.okhttpproject/com.tellfa.okhttpproject.Activities.okHTTP_Page}:
org.greenrobot.eventbus.EventBusException: Subscriber class
com.tellfa.okhttpproject.Activities.okHTTP_Page and its super classes
have no public methods with the @Subscribe annotation at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2204)
at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2254)
at android.app.ActivityThread.access$600(ActivityThread.java:141) at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
at android.os.Handler.dispatchMessage(Handler.java:99) at
android.os.Looper.loop(Looper.java:137) at
android.app.ActivityThread.main(ActivityThread.java:5069) at
java.lang.reflect.Method.invokeNative(Native Method) at
java.lang.reflect.Method.invoke(Method.java:511) at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) at
dalvik.system.NativeStart.main(Native Method) Caused by:
org.greenrobot.eventbus.EventBusException: Subscriber class
com.tellfa.okhttpproject.Activities.okHTTP_Page and its super classes
have no public methods with the @Subscribe annotation at
org.greenrobot.eventbus.SubscriberMethodFinder.findSubscriberMethods(SubscriberMethodFinder.java:67)
at org.greenrobot.eventbus.EventBus.register(EventBus.java:136) at
com.tellfa.okhttpproject.Activities.okHTTP_Page.onCreate(okHTTP_Page.java:23)
at android.app.Activity.performCreate(Activity.java:5104) at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1092)
at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2254) 
at android.app.ActivityThread.access$600(ActivityThread.java:141)  at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
at android.os.Handler.dispatchMessage(Handler.java:99)  at
android.os.Looper.loop(Looper.java:137)  at
android.app.ActivityThread.main(ActivityThread.java:5069)  at
java.lang.reflect.Method.invokeNative(Native Method)  at
java.lang.reflect.Method.invoke(Method.java:511)  at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)  at
dalvik.system.NativeStart.main(Native Method)


 

Answer

you just need to add onEvent method in your activity(okHTTP_Page) with @Subscribe annotation

@Subscribe
public void onEvent(List<okHTTP_dataProvider> infoModels) {

};