Can't create handler inside thread that has not called Looper.prepare()

androiddev · April 21, 2016, 2:11pm

BackendlessFault{ code: ‘Internal client exception’, message: ‘Can’t create handler inside thread that has not called Looper.prepare()’ } While accessing the Backend less it responds as BackendlessFault{ code: ‘Internal client exception’, message: ‘Can’t create handler inside thread that has not called Looper.prepare()’ }, can help??
AsyncCallback<BackendlessCollection<testTable>> callback = new AsyncCallback<BackendlessCollection<testTable>>() {
@Override
public void handleResponse(BackendlessCollection<testTable> response) {
Log.e("", “” + response.getCurrentPage().size());
}
@Override
public void handleFault(BackendlessFault fault) {
Log.e("", “” + fault.toString());
}
};
Backendless.Persistence.of(testTable.class).find(callback);

stanislaw.grin · April 21, 2016, 3:10pm

Hi,

I’ve assigned your issue to our developer, he will contact with you soon to help you.

Regards,
Stanislav

mark-piller · April 21, 2016, 7:04pm

What if you try invoking the API synchronously? Does it work?

BackendlessCollection&lt;testTable&gt; response = Backendless.Persistence.of(testTable.class).find();

androiddev · April 22, 2016, 4:54am

Sorry that is also not working. I am getting that following exception.

04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ BackendlessException{ code: ‘Internal client exception’, message: ‘null’ }

04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at com.backendless.Invoker$SyncResponder.errorHandler(Invoker.java:127)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at com.backendless.core.responder.AdaptingResponder.errorHandler(AdaptingResponder.java:93)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at weborb.client.ioEngine.HttpIOEngine.send(HttpIOEngine.java:213)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at weborb.client.ioEngine.HttpIOEngine.invoke(HttpIOEngine.java:145)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at weborb.client.WeborbClient.invoke(WeborbClient.java:138)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at com.backendless.Invoker.invokeSync(Invoker.java:100)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at com.backendless.Persistence.find(Persistence.java:589)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at com.backendless.DataStoreFactory$1.find(DataStoreFactory.java:155)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at com.example.abdullahs.testbe.MainActivity.getData(MainActivity.java:34)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at com.example.abdullahs.testbe.MainActivity$1.onClick(MainActivity.java:27)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at android.view.View.performClick(View.java:5198)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at android.view.View$PerformClick.run(View.java:21147)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at android.os.Handler.handleCallback(Handler.java:739)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:95)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at android.os.Looper.loop(Looper.java:148)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:5417)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at java.lang.reflect.Method.invoke(Native Method)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
04-22 00:53:09.837 1841-1841/com.example.abdullahs.testbe W/System.err﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

androiddev · April 22, 2016, 5:01am

and also it try with the following code it says that…

new Thread(new Runnable() {
public void run() {
// synchronous backendless API call here:
try {
BackendlessCollection<testTable> response = Backendless.Persistence.of(testTable.class).find();
response.getCurrentPage();
} catch (BackendlessException e) {
e.printStackTrace();
}
}
}).start();

BackendlessException{ code: ‘Internal client exception’, message: ‘Can’t create handler inside thread that has not called Looper.prepare()’ }

denys-konakhevych · April 22, 2016, 7:41am

HI,

You can use following signature to retrieve data not in Android main thread:


Backendless.Persistence.of( testTable.class ).find( 
new AsyncCallback&lt;BackendlessCollection&lt;testTable&gt;>()
{
	@Override
	public void handleResponse( BackendlessCollection&lt;testTable&gt; response )
	{
            // handle retrieved data
	}


	@Override
	public void handleFault( BackendlessFault fault )
	{
            // handle exception
	}
} );

Regards,

Denys

androiddev · April 22, 2016, 8:57am

I use that also still it responds like the same as

BackendlessFault{ code: ‘Internal client exception’, message: ‘Can’t create handler inside thread that has not called Looper.prepare()’ }

void getData() {
Backendless.Persistence.of(testTable.class).find(
new AsyncCallback<BackendlessCollection<testTable>>()

            {
                @Override
                public void handleResponse(BackendlessCollection&lt;testTable&gt; response) {

// handle retrieved data
Log.e("", “” + response.toString());
}

                @Override
                public void handleFault(BackendlessFault fault) {

// handle exception

                    Log.e("", "" + fault.toString());
                }
            });




}

BackendlessFault{ code: ‘Internal client exception’, message: ‘Can’t create handler inside thread that has not called Looper.prepare()’ }

androiddev · April 22, 2016, 8:58am

I can access the date from the Users Table by using the BackendlessUsers Object. But i cant able to access the customized objects like Users, testTable like that…

denys-konakhevych · April 22, 2016, 9:23am

Can you please send example of your code with current issue?

denys-konakhevych · April 22, 2016, 9:43am

You can send it to support@backendless.com

androiddev · April 22, 2016, 9:46am




import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;


import com.backendless.Backendless;
import com.backendless.BackendlessCollection;
import com.backendless.async.callback.AsyncCallback;
import com.backendless.exceptions.BackendlessFault;




public class MainActivity extends FragmentActivity {


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Backendless.initApp(getApplicationContext(), Defaults.APPLICATION_ID, Defaults.SECRET_KEY, Defaults.VERSION);
        Button button = (Button) findViewById(R.id.click);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                getData();
            }
        });
    }


    void getData() {
        Backendless.Persistence.of(testTable.class).find(
                new AsyncCallback&lt;BackendlessCollection&lt;testTable&gt;>()


                {
                    @Override
                    public void handleResponse(BackendlessCollection&lt;testTable&gt; response) {
                        Log.e("", "" + response.toString());
                    }


                    @Override
                    public void handleFault(BackendlessFault fault) {


                        Log.e("", "" + fault.toString());
                    }
                });




    }


    class testTable {
        String created;
        String ownerId;
        String objectId;
        String updated;
        String Neme;


        testTable() {
        }


        public String getOwnerId() {
            return ownerId;
        }


        public void setOwnerId(String ownerId) {
            this.ownerId = ownerId;
        }


        public String getObjectId() {
            return objectId;
        }


        public void setObjectId(String objectId) {
            this.objectId = objectId;
        }


        public String getUpdated() {
            return updated;
        }


        public void setUpdated(String updated) {
            this.updated = updated;
        }


        public String getNeme() {
            return Neme;
        }


        public void setNeme(String neme) {
            Neme = neme;
        }


        public String getCreated() {
            return created;
        }


        public void setCreated(String created) {
            this.created = created;
        }




    }

public class Defaults
{
	public static final String APPLICATION_ID = "235E9A18-408D-2B95-FFA9-3A7378AC1C00";
	  public static final String SECRET_KEY = "10E93804-2C2B-B03D-FFBA-97BA0EA6E000";
	  public static final String VERSION = "v1";
}

Hi,

I tried with both gradle and jar. Still i am getting " BackendlessFault{ code: ‘Internal client exception’, message: ‘Can’t create handler inside thread that has not called Looper.prepare()’ } "
Kindly do the needful.

Thanks,
Abdullah.S

denys-konakhevych · April 22, 2016, 11:49am

Hi Abdullah,

We cannot reproduce your issue with this activity.
According to this issue: http://stackoverflow.com/questions/17379002/java-lang-runtimeexception-cant-create-handler-inside-thread-that-has-not-call
the problem can arrise if you try to call UI events in background thread.
If this wouldn’t fix your problem, please send the whole project.

Regards,

Denys

androiddev · April 22, 2016, 12:17pm

Fine thanks, I ll send my project the support@backendless.com . Please find that and let me know.

alexandr-navara · April 22, 2016, 3:03pm

Move “testTable” class to separate class and make it public
Define default public no-argument constructor inside it

androiddev · April 25, 2016, 7:40am

Thanks Alex . Works fine.