Action bar Back button not working

Question

with the help of these Android Docs.I am trying to do a action bar Back button.I get an Action Bar Back Button like these below image: Output: But My problem is After watching the Gallery images I press the `action bar back button`. Then `it is not working`.But it have to `go back to previous page`. Listed below are the codings. GalleryActivity.java: ``` import android.app.ActionBar; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.support.v4.app.NavUtils; import android.view.MenuItem; import com.fth.android.R; public class GalleryActivity extends FragmentActivity { private int position; private static String id; private static String name; private DemoCollectionPagerAdapter mDemoCollectionPagerAdapter; private ViewPager mViewPager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_gallery); position = getIntent().getExtras().getInt("position"); id = getIntent().ge…

Accepted Answer

I solved these problem by adding the below coding in `GalleryActivity`.

```
ActionBar actionBar;
actionBar=getActionBar();

actionBar.setDisplayHomeAsUpEnabled(true);

@Override
public boolean onOptionsItemSelected(MenuItem item) { 
        switch (item.getItemId()) {
        case android.R.id.home: 
            onBackPressed();
            return true;
        }

return super.onOptionsItemSelected(item);
}
```

In MainActivity:

Previously,

public class HomeActivity extends BaseActivity

Then I change into

public class HomeActivity extends FragmentActivity

In GalleryFragment:

I use `Intent` to pass it to the `GalleryActivity`.

```
@Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
        Gallery gallery = (Gallery) arg0.getAdapter().getItem(arg2);

Intent intent = new Intent(getActivity(), GalleryActivity.class);
        intent.putExtra("position", position);
        intent.putExtra("id", gallery.getGalId());
        intent.putExtra("name", gallery.getAlbumTitle());
        startActivity(intent);

// mCallback.OnGalItemSelected(gallery.getGalId(),gallery.getAlbumTitle());
    } 
```

Action bar Back button not working

Solution

Problem

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