Using AppCompat-21 on Lollipop Device Crashes
I recently upgraded my link 5 to Lollipop. and I am creating an application using AppCompat-21. Styles under values-v21 look like follo
<resources>
<style name="AppTheme" parent="android:Theme.Material.Light">
</style>
</resources>
but when i run the app it crashes with information:
Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
here is my build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 21
buildToolsVersion "21.1.1"
defaultConfig {
applicationId "geone.businspector"
minSdkVersion 11
targetSdkVersion 21
versionCode 1
versionName "1.0"
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:21.0.0'
}
It works fine under a pre-Lollipop device ...
I've googled a lot and didn't have a good solution. has anyone met this before? ps: I am using Android Studio 0.8.14 and I am new to Android Studio. THX.
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This error clearly states that you are using the wrong theme. The actions you use are from the package android.support
, these actions require a theme ThemeCompat
, not the Theme.Material.Light
one that is for the actions in the package android.app
. Rewrite your topic like this:
<resources>
<style name="AppTheme" parent="Theme.AppCompat">
</style>
</resources>
And this error will disappear.
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So I had the same problem and got tired of it and saw people say they don't use Subject material. Don't use Material Theme changes the action bar to gray even if you set a color for it in styles.
Anyway, the fix is that android templates created in android studio use import android.support.v7.app.ActionBarActivity; instead of importing android.app.Activity; and extend ActionBarActivity instead of Activity for main class. Just change the main class to extend Activity instead of ActionBarActivity. Of course, no more changes are needed unless you are using Blank activity.
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