NullPointerException textView.setText（）

Question

i'am here because i cant figured out why i'am getting a nullPointerException with no valid reason, i also do a try and catch block to help me figure the issue but the message is null and the printStackTrace is (void), this issue is occuring in a array loop, in the first item it's everything allright but in the second it's throws NullPointerExcption.

09-16 14:45:09.053: E/AndroidRuntime(4332): FATAL EXCEPTION: main 
09-16 14:45:09.053: E/AndroidRuntime(4332): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.moody/activities.MainActivity}: java.lang.NullPointerException 09-16 14:45:09.053: E/AndroidRuntime(4332): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1956) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at android.app.ActivityThread.access$600(ActivityThread.java:123) 09-16 14:45:09.053: E/AndroidRuntime(4332): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at android.os.Handler.dispatchMessage(Handler.java:99) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at android.os.Looper.loop(Looper.java:137) 09-16 14:45:09.053: E/AndroidRuntime(4332): at android.app.ActivityThread.main(ActivityThread.java:4424) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at java.lang.reflect.Method.invokeNative(Native Method) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at java.lang.reflect.Method.invoke(Method.java:511) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at dalvik.system.NativeStart.main(Native Method) 
09-16 14:45:09.053: E/AndroidRuntime(4332): Caused by: java.lang.NullPointerException 
09-16 14:45:09.053: E/AndroidRuntime(4332): at fragments.TopicsPreview.createTopicsContent(TopicsPreview.java:162) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at fragments.TopicsPreview.createTopicsRows(TopicsPreview.java:85) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at fragments.TopicsPreview.onCreateView(TopicsPreview.java:59) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:828) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1032) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at android.app.BackStackRecord.run(BackStackRecord.java:622) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1382) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at android.app.Activity.performStart(Activity.java:4474) 
09-16 14:45:09.053: E/AndroidRuntime(4332): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1929) 
09-16 14:45:09.053: E/AndroidRuntime(4332): ... 11 more

Debug Expressions

protected void createTopicsContent(MoodleCourseContent[] courseContent,
        LayoutInflater inflater, LinearLayout insertPoint, String courseId) {

    for (int j = 0; j < courseContent.length; j++) {

        final LinearLayout row = new LinearLayout(getActivity());
        row.setLayoutParams(new LayoutParams(
                android.view.ViewGroup.LayoutParams.MATCH_PARENT,
                android.view.ViewGroup.LayoutParams.WRAP_CONTENT));
        View topicsView = inflater.inflate(R.layout.topics_preview_context,
                null);
        TextView topicName = (TextView) topicsView
                .findViewById(R.id.topic_label);

        topicName.setText(courseContent[j].getName());

        // Loop for the modules array
        MoodleModule[] modules = courseContent[j].getMoodleModules();

        for (int i = 0; i < modules.length; i++) {

            final TextView topicModule = (TextView) topicsView
                    .findViewById(R.id.content_preview_textView);
            if (!modules[i].getName().isEmpty()) {

                try {
                    topicModule.setText(modules[i].getName());
                } catch (NullPointerException e) {

                    e.printStackTrace();
                    e.getMessage();
                }

            }

            // Where the textview id will be course id and the textview
            // tag will be the topic id
            topicModule.setId(Integer.parseInt(courseId));
            topicModule.setTag(Long.toString(modules[i].getId()));

            row.addView(topicsView);
            insertPoint.addView(row);

        }
    }

}

Answer 1

Try running this code outside of the onCreate method. The log says 'Unable to start activity' this happens when something in the onCreate method throws an exception. This also could be a reason this code fails, textviews aren't initialized yet.

Try running this code in the onResume method.

Answer 2

It's solved was several structure problems, because i was doing this without checking null array's and other several mistakes, this is the result of developing when we are in a rush. Thanks all for the time spent ;) PS: Can the admin's delete this, this question will not help anybody