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:

importstatic 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;

publicclassActivitytestextendsSherlockFragmentActivityimplementsOnPageChangeListener, TabListener {

privateStringTAG="TestActivity: ";
privateFileCache fileCache;
privateViewPager mPager;
privateActionBar ab;
privatestatic final int COUNT = 3;

@OverrideprotectedvoidonCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.property_add);
    mPager = (ViewPager) findViewById(R.id.pager);
    mPager.setAdapter(newMyAdapter(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));

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

@OverridepublicbooleanonOptionsItemSelected(com.actionbarsherlock.view.MenuItem item) {
    // TODO Auto-generated method stubswitch (item.getItemId()) {
   case android.R.id.home:
       NavUtils.navigateUpFromSameTask(this);
       returntrue;
   }
   returnsuper.onOptionsItemSelected(item);
}
@OverridepublicvoidonPageScrolled(int position, float positionOffset,int positionOffsetPixels) {}
@OverridepublicvoidonPageSelected(int position) {
    getSupportActionBar().setSelectedNavigationItem(position);
}

@OverridepublicvoidonPageScrollStateChanged(int state) {}

@OverridepublicvoidonTabSelected(ActionBar.Tab tab, FragmentTransaction ft) {
    mPager.setCurrentItem(this.getSupportActionBar().getSelectedNavigationIndex()); 
}
@OverridepublicvoidonTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) {}
@OverridepublicvoidonTabReselected(ActionBar.Tab tab, FragmentTransaction ft) {}

publicclassMyAdapterextendsFragmentPagerAdapter {
    publicMyAdapter(FragmentManager fm) {
        super(fm);
    }

    @Overridepublic int getCount() {
        returnCOUNT;
    }

    @OverridepublicFragmentgetItem(int position) {
        Fragment f = newFragment();
        switch (position) {
        case0:
            f = Add1FragmentActivity.newInstance(position);
            break;
        case1:
            f = Add2FragmentActivity.newInstance(position);
            break;
        case2:
            f = Add3FragmentActivity.newInstance(position);
            break;
        default:
            AppLog.logString(TAG+"Default");
            thrownewIllegalArgumentException("not this many fragments: " + position);
        }
        return f;
    }
}
}



publicclassUtils {
privateUtils() {};
publicstaticbooleanhasFroyo() {
    // 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.returnBuild.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO;
}

publicstaticbooleanhasGingerbread() {
    returnBuild.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD;
}

publicstaticbooleanhasHoneycomb() {
    returnBuild.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
}

publicstaticbooleanhasHoneycombMR1() {
    returnBuild.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1;
}

publicstaticbooleanhasJellyBean() {
    returnBuild.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN;
}

}