在完成任务之前先执行android

Question

Hi I'm running the Asynctask in my activity and getting the data from the server. In onPostExecute metod I'm inserting the data in Database now I want to pass those ids in two different fragments I'm passing the the ids by following code:

Bundle bundle = new Bundle();
    bundle.putStringArray(BConstant.TAXONOMY_TID, dbtids);
    bundle.putStringArray(BConstant.PRODUCT_CATEGORY_NAMES,
            dblistProCategory);
    ProductCategoryFragment.newInstance(bundle);

    // ProductDetailsFragment
    Bundle bundleForProductList = new Bundle();
    bundleForProductList
            .putStringArray(BConstant.TAXONOMY_TID, dbtids);
    bundleForProductList.putString(BConstant.WEB_SERVICES_COOKIES,
            cookie);
    bundleForProductList.putStringArray(
            BConstant.PRODUCT_CATEGORY_NAMES, dblistProCategory);
    ProductListFragment.newInstance(bundleForProductList);

But above lines of code get executed before the AsyncTask fininshed. but i have written this line new CategoryFrag().execute(); above this code. what should i do.

Edited

protected void onPostExecute(JSONArray result) {
        listItems = new ArrayList<String>();
        for (int i = 0; i < result.length(); i++) {
            try {
                listItems
                        .add(result.getJSONObject(i)
                                .getString(BConstant.NAME_CONSTANT)
                                .toString());
            } catch (Exception ex) {
                ex.printStackTrace();
            }
        }
        listProCategory = listItems.toArray(new String[0]);
  returnsTID = saDatabaseHandler.getProductCategoryTID();
        for (int i = 0; i < tids.length; i++) {
            if (!returnsTID.contains(tids[i])) {
                saDatabaseHandler.insertProductCategoryData(
                        tids[i], listProCategory[i]);

            }
        }
        getOfflineData();
  }

LOGCAT:

    02-02 11:41:00.451: E/AndroidRuntime(20901): FATAL EXCEPTION: main
    02-02 11:41:00.451: E/AndroidRuntime(20901): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.abc.xyz/com.abc.xyz.ProductListActivity}: java.lang.NullPointerException
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2114)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2139)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.ActivityThread.access$700(ActivityThread.java:143)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1241)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.os.Handler.dispatchMessage(Handler.java:99)
    02-02 11 :41:00.451: E/AndroidRuntime(20901):   at android.os.Looper.loop(Looper.java:137)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.ActivityThread.main(ActivityThread.java:4960)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at java.lang.reflect.Method.invokeNative(Native Method)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at java.lang.reflect.Method.invoke(Method.java:511)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1038)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:805)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at dalvik.system.NativeStart.main(Native Method)
    02-02 11:41:00.451: E/AndroidRuntime(20901): Caused by: java.lang.NullPointerException
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at java.util.Arrays$ArrayList.<init>(Arrays.java:38)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at java.util.Arrays.asList(Arrays.java:154)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.widget.ArrayAdapter.<init>(ArrayAdapter.java:141)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at com.abc.xyz.ProductCategoryFragment$DisplayProductCategoryListArrayAdapter.<init>(ProductCategoryFragment.java:175)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at com.abc.xyz.ProductCategoryFragment.onActivityCreated(ProductCategoryFragment.java:113)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:848)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1035)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1017)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManager.java:1804)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.Activity.performCreate(Activity.java:5206)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2078)
    02-02 11:41:00.451: E/AndroidRuntime(20901):    ... 11 more

Answer 1

call a method defined in your activity from your onPostExecute method. And write the above code inside that method.

If the async task is in another class, the pass context to the async task, and in the onPostExecute method after fetching data from the db, do this:

((YourCallingActivity)mContext).methodName();