In android app Toolbar.setTitle method has no effe

Question

I'm trying to create simple application using android-support-v7:21 library.

Code snippets:
MainActivity.java

public class MainActivity extends ActionBarActivity {

    Toolbar mActionBarToolbar;

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

        mActionBarToolbar = (Toolbar) findViewById(R.id.toolbar_actionbar);            
        mActionBarToolbar.setTitle("My title");
        setSupportActionBar(mActionBarToolbar);
}

activity_main.xml

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    android:orientation="vertical">

    <android.support.v7.widget.Toolbar            
        android:id="@+id/toolbar_actionbar"
        android:background="@null"
        android:layout_width="match_parent"
        android:layout_height="?actionBarSize"
        android:fitsSystemWindows="true" />

</LinearLayout>

But instead of "My title" on Toolbar %application name% is shown.
Seems like setTitle method has no effect.
I would like to show "My title".

UPD: Before, styles.xml was:

<style name="AppTheme" parent="Theme.AppCompat">
    <item name="windowActionBar">false</item>
</style>

So, I thought that actionbar is not used. I add NoActionBar to style parent:

<style name="AppTheme" parent="Theme.AppCompat.NoActionBar">
    <item name="windowActionBar">false</item>
</style>

But the problem is not resolved.

Answer 1

I have a strange behaviour that may can help you.
This is working but it has no effect in onCreate only:

toolbar.setTitle("title");

Try to use this in onCreate:

yourActivityName.this.setTitle("title")

Answer 2

This can be done by setting the android:label attribute of your activity in the AndroidManifest.xml file:

<activity android:name="my activity"
 android:label="The Title I'd like to display" />

And then add this line to the onCreate():

getSupportActionBar().setDisplayShowTitleEnabled(true);

Answer 3

Though not immediately relevant to this particular setup, I found that removing "CollapsingToolbarLayout" from my XML that was wrapping my toolbar inside of an AppBarLayout made everything work.

So, this:

      <android.support.design.widget.AppBarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_height="?attr/actionBarSize"
                app:layout_scrollFlags="scroll|enterAlways"
                app:navigationIcon="@drawable/ic_arrow_back_white_24dp" />

        </android.support.design.widget.AppBarLayout>

Instead of this:

        <android.support.design.widget.AppBarLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <android.support.design.widget.CollapsingToolbarLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:id="@+id/collapsingToolbar"
                android:minHeight="?attr/actionBarSize"
                app:layout_scrollFlags="enterAlways|scroll|snap">

                <android.support.v7.widget.Toolbar
                    android:id="@+id/toolbar"
                    android:layout_height="?attr/actionBarSize"
                    app:navigationIcon="@drawable/ic_arrow_back_white_24dp" />
            </android.support.design.widget.CollapsingToolbarLayout>

        </android.support.design.widget.AppBarLayout>

Then, I set the title in the activity's onCreate, before setSupportActionBar() is called.

Answer 4

This is happening because you are using Toolbar and ActionBar both. Now as you want to use Toolbar as an action bar, the first thing you need to do is disable the decor provided action bar.

The easiest way is to have your theme extend from Theme.AppCompat.NoActionBar.

Answer 5

It's not just about .setTitle

more methods of Support Toolbar (Appcompat v7) in onCreate works only with

getSupportActionBar().method()

and don't work with mToolbar.method()

examples:

getSupportActionBar().setTitle("toolbar title");
getSupportActionBar().setDisplayHomeAsUpEnabled(true);

though next methods works fine without getSupportActionBar() in onCreate

mToolbar.setVisibility(View.VISIBLE);
mToolbar.setNavigationOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        //
    }

Problem only with onCreate event, you still can use mToolbar.setTitle() later instead of annoying getSupportActionBar().setTitle(), for example if you add this in onCreate it will work (because it will be executed later, after onCreate)

mHandler.post(new Runnable() {
    @Override
    public void run() {
        mToolbar.setTitle("toolbar title");
    }
});

I prefer to use this solution https://stackoverflow.com/a/35430590/4548520 than https://stackoverflow.com/a/26506858/4548520 because if you change title many times (in different functions) it's more comfortable to use mToolbar.setTitle() than longer getSupportActionBar().setTitle() one and you don't see annoying notification about null exception like with getSupportActionBar().setTitle()

Answer 6

I tried to rename the toolbar from the fragment

It helped me, I hope to help someone else

Activity activity = this.getActivity();
Toolbar toolbar = (Toolbar) activity.findViewById(R.id.detail_toolbar);
        if (toolbar != null) {
            activity.setTitle("Title");
        }

//toolbar.setTitle("Title"); did not give the same results

Screenshot: