How To Put The Title Of The Activity On The Right Of The Toolbar

I have written a code to shift the title of the activity to right.The following is the java code.I am using getSupportActionBar(). Here's the Image of the toolbar I want package

Solution 1:

You should have a toolbar in your xml layout, so your xml file should look like this :

<?xml version="1.0" encoding="utf-8"?><LinearLayoutxmlns: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:layout_gravity="right"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.example.hsports.practicesession.HomePage"tools:showIn="@layout/activity_home_page"><android.support.design.widget.AppBarLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:theme="@style/AppTheme.AppBarOverlay"><android.support.v7.widget.Toolbarandroid:id="@+id/toolbar"android:layout_width="match_parent"android:layout_height="?attr/actionBarSize"android:background="?attr/colorPrimary"app:popupTheme="@style/AppTheme.PopupOverlay" /></android.support.design.widget.AppBarLayout><TextViewandroid:id="@+id/displayUserEmail"android:layout_width="match_parent"android:layout_height="wrap_content" /><TextViewandroid:id="@+id/displayUserPassword"android:layout_width="match_parent"android:layout_height="wrap_content" /></LinearLayout>

and then you need to set the supportActionBar in the onCreate method like this :

Toolbartoolbar= (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);

after this you can set the title :

getSupportActionBar().setTitle("Welcome"+" "+getUserEmail);

but in your case you're trying to set the title before you've set the supportActionBar, so you're getting NullPointerException.

Also, R.id.toolbar is not in your current xml layout, so again it'll throw a NullPointerException, so change your xml file to add a Toolbar as suggested above.

UPDATE

To have the text on right :

You need to add your own TextView inside the Toolbar and then there's no need to set toolbar title like this :

getSupportActionBar().setTitle("Welcome"+" "+getUserEmail);

Change your activity_home_page.xml code to this :

<?xml version="1.0" encoding="utf-8"?><android.support.design.widget.CoordinatorLayoutxmlns: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.example.hsports.practicesession.HomePage"><android.support.design.widget.AppBarLayoutandroid:layout_width="match_parent"android:layout_height="wrap_content"android:theme="@style/AppTheme.AppBarOverlay"><android.support.v7.widget.Toolbarandroid:id="@+id/toolbar"android:layout_width="match_parent"android:layout_height="?attr/actionBarSize"android:background="?attr/colorPrimary"app:popupTheme="@style/AppTheme.PopupOverlay" ><RelativeLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content"><TextViewandroid:id="@+id/welcomeText"android:layout_marginRight="30dp"android:layout_alignParentRight="true"android:layout_width="wrap_content"android:layout_height="wrap_content" /></RelativeLayout></android.support.v7.widget.Toolbar></android.support.design.widget.AppBarLayout><includelayout="@layout/content_home_page" /><android.support.design.widget.FloatingActionButtonandroid:id="@+id/fab"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="bottom|end"android:layout_margin="@dimen/fab_margin"android:src="@android:drawable/ic_dialog_email" /></android.support.design.widget.CoordinatorLayout>

then in your Activity do this :

Toolbartoolbar= (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
TextViewwelcomeTextView= (TextView) toolbar.findViewById(R.id.welcomeText);
welcomeTextView.setText("Welcome " + getUserEmail);

OUTPUT :

Solution 2:

The null object reference is because you are setting the title of the toolbar before you set the toolbar itself. This can be fixed by:

//REMOVED
    TextView displayUserPassword=(TextView)findViewById(R.id.displayUserPassword);


    displayUserEmail.setText(getUserEmail);
    displayUserPassword.setText(getUserPassword);



    Toolbartoolbar= (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    this.getSupportActionBar().setTitle("Welcome"+" "+getUserEmail);

Solution 3:

Your

this.getSupportActionBar().setTitle("Welcome"+" "+getUserEmail);

is trying to set the title of an action bar that doesn't exist.

Your app theme may not have an action bar or you are not referencing it properly.