TextView marquee in toolbar widget not working despite setting necessary properties

Question

Despite setting necessary properties, the marquee animation is NOT working within my toolbar. Does anyone know what is wrong and how this issue can be fixed?

Unfortunately, {my app name} has stopped

XML

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar       
    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:id="@+id/tramlink_toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:minHeight="?attr/actionBarSize"
    android:background="@color/green"
    android:theme="@style/ThemeOverlay.AppCompat.ActionBar">

    <TextView
        android:id="@+id/textView1"
        android:text="Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua"
        android:textColor="@android:color/white"
        android:textSize="@dimen/abc_text_size_title_material_toolbar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:ellipsize="marquee"
        android:marqueeRepeatLimit="marquee_forever"
        android:scrollHorizontally="true"
        android:focusable="true"
        android:focusableInTouchMode="true"
        android:singleLine="true">
    <requestFocus
        android:duplicateParentState="true"
        android:focusable="true"
        android:focusableInTouchMode="true" />
    </TextView>
</android.support.v7.widget.Toolbar>

Java

public class MainActivity extends AppCompatActivity {

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

        Toolbar mToolbar = (Toolbar) findViewById(R.id.tramlink_toolbar);
        setSupportActionBar(mToolbar);

        TextView marque = (TextView) this.findViewById(R.id.textView1);
        marque.setSelected(true);
        marque.requestFocus();
    }
}

Logcat

08-21 13:11:33.788 2935-2935/? E/AndroidRuntime: FATAL EXCEPTION: main
                                                 Process: com.superbapps.myapp, PID: 2935
                                                 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.superbapps.myapp/com.superbapps.myapp.green.MainActivity}: java.lang.NullPointerException
                                                     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2184)
                                                     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
                                                     at android.app.ActivityThread.access$800(ActivityThread.java:135)
                                                     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
                                                     at android.os.Handler.dispatchMessage(Handler.java:102)
                                                     at android.os.Looper.loop(Looper.java:136)
                                                     at android.app.ActivityThread.main(ActivityThread.java:5001)
                                                     at java.lang.reflect.Method.invokeNative(Native Method)
                                                     at java.lang.reflect.Method.invoke(Method.java:515)
                                                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
                                                     at dalvik.system.NativeStart.main(Native Method)
                                                  Caused by: java.lang.NullPointerException
                                                     at com.superbapps.myapp.green.MainActivity.onCreate(MainActivity.java:48)
                                                     at android.app.Activity.performCreate(Activity.java:5231)
                                                     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
                                                     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
                                                     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) 
                                                     at android.app.ActivityThread.access$800(ActivityThread.java:135) 
                                                     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
                                                     at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                     at android.os.Looper.loop(Looper.java:136) 
                                                     at android.app.ActivityThread.main(ActivityThread.java:5001) 
                                                     at java.lang.reflect.Method.invokeNative(Native Method) 
                                                     at java.lang.reflect.Method.invoke(Method.java:515) 
                                                     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785) 
                                                     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
                                                     at dalvik.system.NativeStart.main(Native Method)

You are trying to get a vertical scrolling marquee right?? – Sujay Aug 21 '16 at 19:11 — Sujay, Aug 21 '16 at 19:11

Mesabloo · Answer 1 · 2016-08-30T18:39:00.667

0

I have maybe found what's wrong.

You call this to get TextView : (TextView)this.findViewById(R.id.textView1); but why do you use this ? (it refers to the Activity, so Runtime can't get it correctly (that's why you got this NPE))

You just need to use (TextView)mToolbar.findViewById(R.id.textView1);

Hope it'll help you, Darkball60.

edited Aug 30 '16 at 18:39

answered Aug 22 '16 at 16:44

Mesabloo

337
4
13

Sujay · Answer 2 · 2016-08-21T19:35:55.853

-1

Your exception seems to be because of wrong Id used to find Toolbar. In layout it is tramlink_toolbar but in Activity you have used green_toolbar.

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

Since you need a horizontal marquee, you need to set singleLine valuetrue for TextView (Currently it is false).

android:singleLine="true"

edited Aug 21 '16 at 19:35

answered Aug 21 '16 at 18:50

Sujay

3,417
1
23
25

Apologies. I used `tramlink_toolbar` in the first place. – wbk727 Aug 21 '16 at 18:51
The name of my toolbar IS `tramlink_toolbar` but it's STILL NOT working :-( – wbk727 Aug 21 '16 at 19:03
Accidentally yes!! – wbk727 Aug 21 '16 at 19:11
@MacaronLover Check updated answer & look whether that helps. – Sujay Aug 21 '16 at 19:16
Don't want vertical. I want a horizontal marquee. – wbk727 Aug 21 '16 at 19:31
@MacaronLover Check answer. You need to set singleLine true for TextView – Sujay Aug 21 '16 at 19:36

TextView marquee in toolbar widget not working despite setting necessary properties

2 Answers2