Java.lang.NoClassDefFoundError in android

Question

I am unable solve this problem since 1 days, i faced when in AsyncTask and its on postexecute, during intent call it occurs.

@Override
        protected void onPostExecute(Void result) {
            super.onPostExecute(result);
            // Dismiss the progress dialog
            try {
                Intent isplash= new Intent(Splash.this,MainPage.class);
                startActivity(isplash);
                finish();
            } catch (Exception e) {
                e.printStackTrace();
            } 

    }

in menefest.xml

<activity android:name=".MainPage" 
            android:screenOrientation="landscape"></activity>

and faced errors:

Unable to resolve superclass of Lco/test/MainPage; (130)
Link of class 'Lco/test/MainPage;' failed
Could not find class 'co.test.MainPage', referenced from method co.test.Splash$GetData.onPostExecute
VFY: unable to resolve const-class 320 (Lco/test/MainPage;) in Lco/test/Splash$GetData;

and

FATAL EXCEPTION: main
java.lang.NoClassDefFoundError: co.test.MainPage
at co.test.Splash$GetData.onPostExecute(Splash.java:1732)
at co.test.Splash$GetData.onPostExecute(Splash.java:1)
at android.os.AsyncTask.finish(AsyncTask.java:602)
at android.os.AsyncTask.access$600(AsyncTask.java:156)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615)

Problem: when call Intent . why this? i don;t know?? Search on google lots of time but could not find any proper solution to get out.

Dont need to put the Intent block in postExecute() just do simple — Avishek Das, Mar 25 '15 at 09:02
Why not onPostExecute ?? why in onTaskComplete().? , here I used AsyncTask during fetching data from server. — Bixms, Mar 25 '15 at 09:06
check below and i have posted there is issue of context for calling activity. — Jignesh Jain, Mar 25 '15 at 09:14

score 2 · Accepted Answer · answered Mar 25 '15 at 09:13

2

the code might look something like this,

public class MyAsyncTask extends AsyncTask {

    Context context;
    private MyAsyncTask(Context context) {
        this.context = context.getApplicationContext();
    }

    @Override
    protected Object doInBackground(Object... params) {
        ...
    }

    @Override
    protected void onPostExecute(List<VideoDataDescription> result) {
        super.onPostExecute(result);
        MainActivity.progressDialog.dismiss();

        context.startActivity(new Intent(context, ResultsQueryActivity.class));
    }
}

you'd call it like this:

 new MyAsyncTask(context).execute();

answered Mar 25 '15 at 09:13

Jignesh Jain

1,518
12
28

Still have a same problem. I try this way, but not work. – Bixms Mar 25 '15 at 09:40
in my case it's working perfect please post your mainpage.java and Splash.java – Jignesh Jain Mar 25 '15 at 09:46
hey please check this link i think it will be helpful to you http://stackoverflow.com/questions/6168841/unable-to-resolve-superclass-error-when-referencing-jar-library – Jignesh Jain Mar 25 '15 at 09:55

score 0 · Answer 2 · answered Mar 25 '15 at 09:15

0

Please make sure that if activity class lies in different package, package name must be included in manifest file like this:

<activity android:name="co.test.MainPage" 
          android:screenOrientation="landscape"></activity>

answered Mar 25 '15 at 09:15

rajesh

199
1
11

Java.lang.NoClassDefFoundError in android

2 Answers2