Getactionbar() Returns Null (Appcompat-V7 21)

getActionBar() returns Null (AppCompat-v7 21)

You need to call getSupportActionBar() on an ActionBarActivity. Do not call getActionBar() -- that is not available on older devices, and for the new r21 edition of appcompat-v7, I would expect it to return null all the time, as the new ActionBarActivity disables and replaces the system action bar.

getActionBar() returns null in PreferenceActivity (AppCompat-v7 21)

as xXx requested I am providing example how I done:

public class SettingsActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Display the fragment as the main content.
        getFragmentManager().beginTransaction()
                .replace(android.R.id.content, new SettingsFragment())
                .commit();

        // use action bar here
        ActionBar actionBar = getSupportActionBar();
    }

    public static class SettingsFragment extends PreferenceFragment {
        @Override
        public void onCreate(Bundle paramBundle) {
            super.onCreate(paramBundle);
            addPreferencesFromResource(R.xml.pref_settings);
        }
    }

}

getActionBar() returns NULL in actionBar

I always have this error....
I found a solution which I put this to my Style it will be work and getActionBar() won't be null anymore...

<item name="android:windowNoTitle">false</item>
<item name="android:windowActionBar">true</item>

Hope this help you

getActionBar returns null

It seems you need to request having an Actionbar (!= titlebar) either via a Theme or via below code.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // The Action Bar is a window feature. The feature must be requested
    // before setting a content view. Normally this is set automatically
    // by your Activity's theme in your manifest. The provided system
    // theme Theme.WithActionBar enables this for you. Use it as you would
    // use Theme.NoTitleBar. You can add an Action Bar to your own themes
    // by adding the element <item name="android:windowActionBar">true</item>
    // to your style definition.
    getWindow().requestFeature(Window.FEATURE_ACTION_BAR);

    setContentView(R.layout.main);

    // experiment with the ActionBar 
    ActionBar actionBar = getActionBar();
    actionBar.hide();
}

Code from [here]

Android ActionBar always null

*First of all include this dependency in your gradle file

compile 'com.android.support:appcompat-v7:22.2.0'

*You should extend your activity to AppCompactActivity and start using toolbar instead of ActionBar.

*This is how you use Toolbar in your MainActivity

public class MainActivity extends AppCompatActivity {

    private Toolbar mToolbar;

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

        mToolbar = (Toolbar) findViewById(R.id.toolbar);

        setSupportActionBar(mToolbar);
        getSupportActionBar().setDisplayShowHomeEnabled(true);
    }
}

*this is how to add toolbar in your activity_main.xml

<android.support.v7.widget.Toolbar
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:minHeight="?attr/actionBarSize"
    android:background="?attr/colorPrimary"
    local:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
    local:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

*your theme should look something like this styles.xml

<style name="MyMaterialTheme" parent="MyMaterialTheme.Base">

    </style>

    <style name="MyMaterialTheme.Base" parent="Theme.AppCompat.Light.DarkActionBar">
        <item name="windowNoTitle">true</item>
        <item name="windowActionBar">false</item>
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

make sure you add this style name in your manifest for your application.

*It will be better if you use v4.app.Fragment rather than using Fragment.

*this is how you should set title from your Fragment class

((AppCompatActivity)getActivity()).getSupportActionBar().setTitle(R.string.home);

Refer this clear Tutorial which will surely help you setting up material Navigation drawer.

If you want to quickly start off without much pain then you can try integrating this third party library.

ActionBar object is returned as null

You need to use getSupportActionBar() when you use AppCompatActivity instead of getActionBar().

EDIT

When you use AppCompat theme you have to use AppCompatActivity.

Example code how to get ActionBar:

Activity activity = getActivity();
if(activity != null && activity instanceof AppCompatActivity) {
   AppCompatAcitivyt appCompatActivity = (AppCompatActivity) activity;
   ActionBar actionBar = appCompatActivity.getSupportActionBar();
   //your code
}

getActionBar() returns null in api 19, targets api 21 min sdk 16

If you want to use ActionBar on support library, you have to extend ActionBarActivity class instead of Activity, and use getSupportActionBar() in place of getActionBar() to get ActionBar.

getActionBar(), getSupportActionBar() returns java.nullpointer.exception

From what i can get from your question is that you are looking to design custom Action Bar for your Application,right?

If yes then below code may help you out:

public class MainActivity extends Activity {

       @Override
    protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            ActionBar bar = getActionBar();
            bar.setDisplayShowTitleEnabled(false);
            bar.setDisplayShowCustomEnabled(true);
            bar.setCustomView(R.layout.row);
            bar.show();
    }
}

Please Note that enabling customenabled property on action bar is important for your Actionbar to implement custom view.

bar.setDisplayShowCustomEnabled(true)

And also no need to use to LayoutInflator you could directly feed action bar custom layout by using

actionbar.setCustomView(your layout file)

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