Android Error on Action Bar?

Question

I;m developing an android application to make action bar transparent and put a back button on action bar. When i done the code it is showing stopped working.

My code is

public class Song_List extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_song__list);

        ActionBar ab = getActionBar();
        ab.setDisplayHomeAsUpEnabled(true);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
                // app icon in action bar clicked; go home
                Intent i=new Intent(Song_List.this, MainActivity.class);
                i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

                startActivity(i);
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }
}

The log cat is this...

   java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.jithin.myapplication/com.example.jithin.myapplication.Song_List}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ActionBar.setDisplayHomeAsUpEnabled(boolean)' on a null object reference
                                                                                      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2426)
                                                                                      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2490)

Can anyone suggest me a code to make my action bartransparent and show a back buttton on this .. Thank You

used getSupportActionbar() instead of getActionBar() – Arjun saini Aug 25 '16 at 05:44 — Arjun saini, Aug 25 '16 at 05:44

Rahul · Answer 1 · 2016-08-25T05:48:29.777

1

use

    getSupportActionBar()

instead of

    getActionBar()

edited Aug 25 '16 at 05:48

answered Aug 25 '16 at 05:43

Rahul

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Shows Error ..The code becomes red (Cannot resolve Method ) – Jithin Ezio Aug 25 '16 at 05:44
which class are you using 'android.app.ActionBar' or 'android.support.v7.app.ActionBar' for getActionBar() ? – Rahul Aug 25 '16 at 05:46
No just Action Bar – Jithin Ezio Aug 25 '16 at 05:47
check imports please and let me know – Rahul Aug 25 '16 at 05:47
Typo: getSupportActionBar has a capital B – F43nd1r Aug 25 '16 at 05:48
android.app.ActionBar; (This is the imoprt – Jithin Ezio Aug 25 '16 at 05:49
AndroidDeveloperTrainee as @F43nd1r said please check for typo mistake – Rahul Aug 25 '16 at 05:49
first try for getSupportActionBar() else update your import with android.support.v7.app.ActionBar for getActionBar() – Rahul Aug 25 '16 at 05:50

Android Error on Action Bar?

1 Answers1