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onback pressed data not showing in fragments

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I am using navigation drawer in my app,I have fragments like F1,F2 and so on..and in every fragment I am parsing data and display in listview ,everything is works fine if I go through my app like F1>F2>F3 and so on..but the issue is if I go from F3 to F2,the data which I had in my F2 fragments is not showing,and display only blank page,what is the issue?Can any one help? My F1 public class Categriesdrawers extends Fragment{ private ImageView drwr; private SlidingDrawer sldrwr; private ProgressDialog pDialog; JSONArray categorylist=null; private ListView listview; private ArrayList<HashMap

Disable back button in android

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问题 How to disable back button in android while logging out the application? 回答1: Override the onBackPressed method and do nothing if you meant to handle the back button on the device. @Override public void onBackPressed() { if (!shouldAllowBack()) { doSomething(); } else { super.onBackPressed(); } } 回答2: If looking for a higher api level 2.0 and above this will work great @Override public void onBackPressed() { // Do Here what ever you want do on back press; } If looking for android api level

How to implement onBackPressed() in Fragments?

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问题 Is there a way in which we can implement onBackPressed() in Android Fragment similar to the way in which we implement in Android Activity? As the Fragment lifecycle do not have onBackPressed() . Is there any other alternative method to over ride onBackPressed() in Android 3.0 fragments? 回答1: I solved in this way override onBackPressed in the Activity. All the FragmentTransaction are addToBackStack before commit: @Override public void onBackPressed() { int count = getSupportFragmentManager()