Question

i’m getting a weird null pointer exception in the last line of this code:

tab.addTab(newSpec);

this is the code:

private TabHost tab;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_friends);

    tab = (TabHost) findViewById(R.id.activity_friends_tab);


    addTab("Chat", ChatTab.class);
}
private void addTab(String title, Class<?> cls)
{       
    TabSpec newSpec = tab.newTabSpec(title);
    newSpec.setIndicator(title);
    Intent newIntent = new Intent(this, cls);
    newSpec.setContent(newIntent);
    tab.addTab(newSpec);
}

can’t understand why..

Answer 1

found my error:
i should have added the local activity manager and run tab.setup:

        LocalActivityManager mLocalActivityManager = new LocalActivityManager(
            this, false);
    mLocalActivityManager.dispatchCreate(savedInstanceState);
    tab.setup(mLocalActivityManager);