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[英]Issue with You need to use a Theme.AppCompat theme (or descendant) with this activity Theme.AppCompat theme (or descendant) with this activity"
[英]“You need to use a Theme.AppCompat theme (or descendant) with this activity” when using AppCompat theme
我的應用程序有一個非常奇怪的問題。 更新到支持庫的最新版本后,出現以下錯誤:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.app/com.example.app.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
這是引發異常的地方:
public class MainActivity extends AppCompatActivity {
…
@Override
protected void onCreate(Bundle savedInstanceState) {
getWindow().requestFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
super.onCreate(savedInstanceState);//Exception thrown here
}
…
}
奇怪的是,我在所有Activity中都使用AppCompat主題: AndroidManifest.xml:
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme"
android:name="com.orm.SugarApp">
<activity
android:name="com.example.app.MainActivity"
android:label="@string/app_name"
android:screenOrientation="portrait"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
…
</application>
styles.xml:
<resources>
<style name="AppBaseTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- your app branding color for the app bar -->
<item name="colorPrimary">@color/primary</item>
<!-- darker variant for the status bar and contextual app bars -->
<item name="colorPrimaryDark">@color/primary_dark</item>
<!-- theme UI controls like checkboxes and text fields -->
<item name="colorAccent">@color/accent</item>
<item name="actionBarStyle">@style/MyActionBar</item>
<item name="actionBarTabTextStyle">@style/MyActionBarTabText</item>
<item name="windowActionBarOverlay">true</item>
</style>
<style name="MyActionBar"
parent="Widget.AppCompat.Light.ActionBar.Solid">
<item name="android:icon">@drawable/ic_launcher</item>
<item name="icon">@drawable/ic_launcher</item>
</style>
<style name="MyActionBarTabText" parent="Widget.AppCompat.ActionBar.TabText">
<item name="textAllCaps">false</item>
<item name="android:textAllCaps">false</item>
<item name="android:textSize">16sp</item>
</style>
<!-- Application theme. -->
<style name="AppTheme" parent="AppBaseTheme">
</style>
<style name="menu_labels_style">
<item name="android:background">@drawable/fab_label_background</item>
<item name="android:textColor">@color/white</item>
</style>
</resources>
為什么會引發此異常?
編輯:
v21 / styles.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="AppTheme" parent="AppBaseTheme">
<!-- Main theme colors -->
<!-- your app branding color for the app bar -->
<item name="android:colorPrimary">@color/primary_lolipop</item>
<!-- darker variant for the status bar and contextual app bars -->
<item name="android:colorPrimaryDark">@color/primary_dark</item>
<!-- theme UI controls like checkboxes and text fields -->
<item name="android:colorAccent">@color/accent</item>
<item name="android:actionBarStyle">@style/MyActionBar</item>
<item name="android:colorButtonNormal">@color/accent</item>
<item name="android:textColorAlertDialogListItem">@color/accent</item>
<item name="android:navigationBarColor">@color/navbar</item>
<item name="android:actionBarTabTextStyle">@style/MyActionBarTabText</item>
<item name="android:windowActionBarOverlay">true</item>
<item name="android:windowContentTransitions">true</item>
<item name="android:windowAllowEnterTransitionOverlap">true</item>
<item name="android:windowAllowReturnTransitionOverlap">true</item>
<item name="android:windowSharedElementEnterTransition">@android:transition/move</item>
<item name="android:windowSharedElementExitTransition">@android:transition/move</item>
</style>
</resources>
遷移到androidx后,我遇到了同樣的問題。 我已經解決了,只需從
implementation 'androidx.appcompat:appcompat:1.0.0'
至
implementation 'androidx.appcompat:appcompat:1.0.2'
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