I am having trouble running my Android app in a fullscreen mode per instructions of a video. When it tries to run, the app crashes with the error.
"You need to use a Theme.AppCompat theme (or descendant) with this activity
Manifest File
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.djsg38.hikerswatch">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Styles File
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
Partial MainActivity that may be useful
public class MainActivity extends AppCompatActivity {
This question is related to
android
android-appcompat
appcompatactivity
Your application has an AppCompat theme
<application
android:theme="@style/AppTheme">
But, you overwrote the Activity (which extends AppCompatActivity) with a theme that isn't descendant of an AppCompat theme
<activity android:name=".MainActivity"
android:theme="@android:style/Theme.NoTitleBar.Fullscreen" >
You could define your own fullscreen theme like so (notice AppCompat in the parent=)
<style name="AppFullScreenTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="android:windowNoTitle">true</item>
<item name="android:windowActionBar">false</item>
<item name="android:windowFullscreen">true</item>
<item name="android:windowContentOverlay">@null</item>
</style>
Then set that on the Activity.
<activity android:name=".MainActivity"
android:theme="@style/AppFullScreenTheme" >
Note: There might be an AppCompat theme that's already full screen, but don't know immediately
u should add a theme to ur all activities (u should add theme for all application in ur <application> in ur manifest)
but if u have set different theme to ur activity u can use :
android:theme="@style/Theme.AppCompat"
or each kind of AppCompat theme!
If you add the android:theme="@style/Theme.AppCompat.Light" to <application> in AndroidManifest.xml file, problem is solving.
Used to face the same problem. The reason was in incorrect context passing to AlertDialog.Builder(here). use like
AlertDialog.Builder(Homeactivity.this)
Source: Stackoverflow.com