GetSupportActionBar Returns Null

I'm trying to use the ActionBarSherlock library for using Action Bar in older devices. My application run on Android(4.2-Real device). But, when I tried it to open in my older gala

Solution 1:

If you are using ABS, then why are you using TabHost? You can use fragments in ABS to create tabs. And moreover, getSupportActionBar should be imported from import android.support.v7.app.ActionBar

Solution 2:

Action bar with tab:

import static com.actionbarsherlock.app.ActionBar.NAVIGATION_MODE_TABS;
import android.app.Dialog;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.NavUtils;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.TextView;
import com.actionbarsherlock.app.ActionBar;
import com.actionbarsherlock.app.ActionBar.TabListener;
import com.actionbarsherlock.app.SherlockFragment;
import com.actionbarsherlock.app.SherlockFragmentActivity;

public class Activitytest extends SherlockFragmentActivity implements OnPageChangeListener, TabListener {

private String TAG="TestActivity: ";
private FileCache fileCache;
private ViewPager mPager;
private ActionBar ab;
private static final int COUNT = 3;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.property_add);
    mPager = (ViewPager) findViewById(R.id.pager);
    mPager.setAdapter(new MyAdapter(getSupportFragmentManager()));
    mPager.setOnPageChangeListener(this);
    ab = getSupportActionBar();

     if (Utils.hasHoneycomb()) {
         ab.setDisplayShowTitleEnabled(false);
         ab.setDisplayHomeAsUpEnabled(false);
         getSupportActionBar().setDisplayShowHomeEnabled(false);
        }else{
            ab.setDisplayShowTitleEnabled(false);
            ab.setDisplayShowHomeEnabled(false);
        }
    ab.setNavigationMode(NAVIGATION_MODE_TABS);

    ab.addTab(ab.newTab().setText("TAB").setTabListener(this));
    ab.addTab(ab.newTab().setText("TAB 1").setTabListener(this));
    ab.addTab(ab.newTab().setText("TAB 2").setTabListener(this));

}       
@Override
public boolean onCreateOptionsMenu(com.actionbarsherlock.view.Menu menu) {
    // TODO Auto-generated method stub
    com.actionbarsherlock.view.MenuInflater inflater = getSupportMenuInflater();
    inflater.inflate(R.menu.home, menu);
    return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onOptionsItemSelected(com.actionbarsherlock.view.MenuItem item) {
    // TODO Auto-generated method stub
   switch (item.getItemId()) {
   case android.R.id.home:
       NavUtils.navigateUpFromSameTask(this);
       return true;
   }
   return super.onOptionsItemSelected(item);
}
@Override
public void onPageScrolled(int position, float positionOffset,int positionOffsetPixels) {}
@Override
public void onPageSelected(int position) {
    getSupportActionBar().setSelectedNavigationItem(position);
}

@Override
public void onPageScrollStateChanged(int state) {}

@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
    mPager.setCurrentItem(this.getSupportActionBar().getSelectedNavigationIndex()); 
}
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {}

public class MyAdapter extends FragmentPagerAdapter {
    public MyAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public int getCount() {
        return COUNT;
    }

    @Override
    public Fragment getItem(int position) {
        Fragment f = new Fragment();
        switch (position) {
        case 0:
            f = Add1FragmentActivity.newInstance(position);
            break;
        case 1:
            f = Add2FragmentActivity.newInstance(position);
            break;
        case 2:
            f = Add3FragmentActivity.newInstance(position);
            break;
        default:
            AppLog.logString(TAG+"Default");
            throw new IllegalArgumentException("not this many fragments: " + position);
        }
        return f;
    }
}
}



public class Utils {
private Utils() {};
public static boolean hasFroyo() {
    // Can use static final constants like FROYO, declared in later versions
    // of the OS since they are inlined at compile time. This is guaranteed behavior.
    return Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO;
}

public static boolean hasGingerbread() {
    return Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD;
}

public static boolean hasHoneycomb() {
    return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
}

public static boolean hasHoneycombMR1() {
    return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1;
}

public static boolean hasJellyBean() {
    return Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN;
}

}