Android App - the toolbar goes away when I debug the app

Question

In Android Studio, the app shows like I expect it to. Although when the app is debugged, the banner that displays the name of the app disappears.

Where did I make an error?

To be more clear, here's how it shows on Android Studio:

Here's how it shows when I run the app (as you can see there's no banner)

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    tools:context="com.example.it5.foothillers.MainActivity"
    android:background="#f4f4f4">

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:weightSum="1"
        android:paddingEnd="0dp"
        android:paddingStart="0dp"
        android:layout_margin="0dp">

        <Button
            android:layout_width="fill_parent"
            android:layout_height="23dp"
            android:text="NEWS"
            android:id="@+id/button"
            android:layout_weight="0.28"
            android:background="@android:color/holo_blue_bright"
            android:textColor="#ffffff"
            android:textSize="48dp" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="SPORTS"
            android:id="@+id/button2"
            android:layout_weight="0.20"
            android:background="@android:color/holo_blue_light"
            android:textColor="#ffffff"
            android:textSize="48dp" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="24dp"
            android:text="EVENTS"
            android:id="@+id/button3"
            android:layout_weight="0.29"
            android:background="@android:color/holo_blue_dark"
            android:textColor="#ffffff"
            android:textSize="48dp" />

        <Button
            android:layout_width="match_parent"
            android:layout_height="24dp"
            android:text="MORE"
            android:id="@+id/button4"
            android:layout_weight="0.24"
            android:background="#f1f108"
            android:textSize="48dp" />
    </LinearLayout>
</RelativeLayout>

Mounir Elfassi · Accepted Answer · 2016-03-29T19:21:05.350

1

Update:

if your app extends Activity please change if to AppCompatActivity.

edited Mar 29 '16 at 19:21

answered Mar 29 '16 at 19:12

Mounir Elfassi

2,242
3
23
38

If you look at an [older post](http://stackoverflow.com/q/36269706/2308683) by this user, it would appear that theme is already used. – OneCricketeer Mar 29 '16 at 19:15
thank you ,i guess he only needs the `AppCompatActivity`.. – Mounir Elfassi Mar 29 '16 at 19:18
Hey, you're a hero!!! Thank you!! It worked :)) @MounirElfassi – Martintoobeast Mar 29 '16 at 19:34
you are welcome, glad to help,you can upvote now you have 20 points hhh – Mounir Elfassi Mar 29 '16 at 19:37
I up-voted!!! Thank you that was such an easy fix. – Martintoobeast Mar 29 '16 at 19:38

Isaac Urbina · Answer 2 · 2016-03-29T23:53:00.040

1

Make sure your class extends AppCompatActivity and if still you don't see the action bar, try changing the theme of your app in the AndroidManifest.xml to Theme.AppCompat.Light.DarkActionBar.

You can also try setting this in your styles.xml in res

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

I hope it helps! Kind regards!

edited Mar 29 '16 at 23:53

answered Mar 29 '16 at 19:41

Isaac Urbina

1,295
11
21

The actionbar is displayed by changing class extends to AppCompatActivity. It worked!!! such an easy fix @Isaac – Martintoobeast Mar 30 '16 at 16:14

Android App - the toolbar goes away when I debug the app

2 Answers2