How to create button in Action bar in android [duplicate]

Question

I am working on android application where i need a button in action bar. These are my activity and java files. So, i need a button at right side of my tool bar. Thanks in advance.

content_b2_bdeliveries.xml:

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:context="com.ideabiz.riderapplication.ui.B2BDeliveriesActivity" tools:showIn="@layout/activity_b2_bdeliveries"> //remaining code; </LinearLayout> 

activity_b2_bdeliveries.xml:

<?xml version="1.0" encoding="utf-8"?> <android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" tools:context="com.ideabiz.riderapplication.ui.B2BDeliveriesActivity">  <android.support.design.widget.AppBarLayout     android:layout_width="match_parent"     android:layout_height="wrap_content"     android:theme="@style/AppTheme.AppBarOverlay">  </android.support.design.widget.AppBarLayout>  <include layout="@layout/content_b2_bdeliveries" />  </android.support.design.widget.CoordinatorLayout> 

B2BDeliveriesActivity.java:

public class B2BDeliveriesActivity extends AppCompatActivity { private final String TAG_NAME="B2BActivity"; @Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_b2_bdeliveries);     sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());     ActionBar actionBar = getSupportActionBar();     //Log.d(TAG_NAME,actionBar.toString());     if (actionBar != null) {         try {             actionBar.setDisplayHomeAsUpEnabled(true);             } catch (Exception e) {                 Crashlytics.logException(e);                 Log.d(TAG_NAME, "Null Pointer from setDisplayHomeAsUpEnabled" + e.getMessage());                 Utilities.issueTokenUpload("Null Pointer from setDisplayHomeAsUpEnabled" + e, sharedPreferences.getInt("tripId", 999999), sharedPreferences.getString("driverPhoneNo", "9999999999"), sharedPreferences.getString("driverName", "default"), getResources().getString(R.string.version));             }     } } 

Answer 1

In your activity class, override the following methods if they are not there by default:

// create an action bar button @Override public boolean onCreateOptionsMenu(Menu menu) {     // R.menu.mymenu is a reference to an xml file named mymenu.xml which should be inside your res/menu directory.      // If you don't have res/menu, just create a directory named "menu" inside res     getMenuInflater().inflate(R.menu.mymenu, menu);     return super.onCreateOptionsMenu(menu); }  // handle button activities @Override public boolean onOptionsItemSelected(MenuItem item) {     int id = item.getItemId();      if (id == R.id.mybutton) {     // do something here     }     return super.onOptionsItemSelected(item); } 

mymenu.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android"   xmlns:app="http://schemas.android.com/apk/res-auto"> <item     android:id="@+id/mybutton"     android:title=""     app:showAsAction="always"     android:icon="@drawable/mybuttonicon"     /> </menu> 

Answer 2

If you want to customize UI of your ActionBar, then you can use Toolbar as ActionBar. Here are the steps to do the same :

1. Add below code as a child of AppBarLayout in your activity layout xml.

   <android.support.v7.widget.Toolbar         android:id="@+id/toolbar"         android:layout_width="match_parent"         android:layout_height="?attr/actionBarSize" >          <LinearLayout             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:weightSum="1">              <TextView                 android:id="@+id/title"                 android:layout_width="0dp"                 android:layout_height="wrap_content"                 android:layout_weight="1"                 android:text="ActionBar Title"/>              <Button                 android:layout_width="wrap_content"                 android:layout_height="wrap_content" />          </LinearLayout>      </android.support.v7.widget.Toolbar> 

2. Make your Toolbar as ActionBar by adding the below code in your Activity onCreate() method.

   Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); getSupportActionBar().setDisplayHomeAsUpEnabled(true); 

3. In AndroidManifest.xml, add following theme to your activity:

   android:theme="@style/AppTheme.NoActionBar" 

4. In styles.xml add following code:

   <style name="AppTheme.NoActionBar">     <item name="windowActionBar">false</item>     <item name="windowNoTitle">true</item> </style>