Question

I am trying to refresh my custom ListViewAdapter;

Edit :

When I click an item in Listview it is calling the GoruntuleActivity’s screen and creating oncreate method (I am assuming it is creating..) and then I call a method of GoruntuleActivity and the layputInflater is into this Activity.

ListeleActivity.java

lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View item,
                    int position, long id) {

                onClickPosition = position;

                final Intent intent = new Intent(ListeleActivity.this,
                        GoruntuleActivity.class);
                startActivity(intent);

                goruntuleNesnesi.isSetListRefresh(onClickPosition , issetlist);
            }
        });

and it is calling the method of GoruntuleActivity.java

  public void isSetListRefresh(int onClickPosition, ArrayList<String> issetlist )
    {
        issetlist.set(onClickPosition, "false");
        setRecentOrSeen(issetlist);
        ListviewRefresh();
    }

    public void ListviewRefresh() 
    {
        LayoutInflater mLInflater = LayoutInflater.from(this);

        ListViewAdapter adapter = new ListViewAdapter(
                getApplicationContext(), getKimdenList(), getKonuList(), getRecentOrSeen() ,
                mLInflater);
        adapter.Remove();

    }

And now it is giving me another Exception..

05-18 16:25:22.073: E/AndroidRuntime(807): FATAL EXCEPTION: main
05-18 16:25:22.073: E/AndroidRuntime(807): java.lang.IllegalStateException: System services not available to Activities before onCreate()
05-18 16:25:22.073: E/AndroidRuntime(807):  at android.app.Activity.getSystemService(Activity.java:3526)
05-18 16:25:22.073: E/AndroidRuntime(807):  at android.view.LayoutInflater.from(LayoutInflater.java:171)
05-18 16:25:22.073: E/AndroidRuntime(807):  at com.mobil.eposta.GoruntuleActivity.ListviewRefresh(GoruntuleActivity.java:160)
05-18 16:25:22.073: E/AndroidRuntime(807):  at com.mobil.eposta.GoruntuleActivity.isSetListRefresh(GoruntuleActivity.java:155)
05-18 16:25:22.073: E/AndroidRuntime(807):  at com.mobil.eposta.ListeleActivity$1.onItemClick(ListeleActivity.java:137)
05-18 16:25:22.073: E/AndroidRuntime(807):  at android.widget.AdapterView.performItemClick(AdapterView.java:284)
05-18 16:25:22.073: E/AndroidRuntime(807):  at android.widget.ListView.performItemClick(ListView.java:3382)
05-18 16:25:22.073: E/AndroidRuntime(807):  at android.widget.AbsListView$PerformClick.run(AbsListView.java:1696)
05-18 16:25:22.073: E/AndroidRuntime(807):  at android.os.Handler.handleCallback(Handler.java:587)
05-18 16:25:22.073: E/AndroidRuntime(807):  at android.os.Handler.dispatchMessage(Handler.java:92)
05-18 16:25:22.073: E/AndroidRuntime(807):  at android.os.Looper.loop(Looper.java:123)
05-18 16:25:22.073: E/AndroidRuntime(807):  at android.app.ActivityThread.main(ActivityThread.java:4627)
05-18 16:25:22.073: E/AndroidRuntime(807):  at java.lang.reflect.Method.invokeNative(Native Method)
05-18 16:25:22.073: E/AndroidRuntime(807):  at java.lang.reflect.Method.invoke(Method.java:521)
05-18 16:25:22.073: E/AndroidRuntime(807):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-18 16:25:22.073: E/AndroidRuntime(807):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-18 16:25:22.073: E/AndroidRuntime(807):  at dalvik.system.NativeStart.main(Native Method)

Answer 1

From the error logs, it looks like getApplicationContext() is returning null. When are you calling goruntuleNesnesi.ListviewRefresh();? Is it in the onCreate(…)? If so, that may be your problem as getApplicationContext(...) will return null until onCreate(...) is done initializing.

Edit: I looked through the stack trace a bit more and it looks like you’re calling ListviewRefresh on a button click. Have you tried using this instead of getApplicationContext(…)?

Edit 2: Try this:

ListViewAdapter adapter = new ListViewAdapter(this, getKimdenList(), getKonuList(), getRecentOrSeen() ,mLInflater); 

Although, I think it may suffer from the same problem because the activity hasn’t been drawn on the screen yet and hasn’t been initialized, you can’t inflate views on it. Try it out and we’ll go from there.