导致android异常的原因"你需要在这个活动中使用Theme.AppCompat主题(或后代)."

Question

我试图在Android中试用新的Material Theme.

我目前仍然坚持这个例外

03-06 09:35:50.177: D/AndroidRuntime(30607): Shutting down VM
03-06 09:35:50.178: E/AndroidRuntime(30607): FATAL EXCEPTION: main
03-06 09:35:50.178: E/AndroidRuntime(30607): Process: com.example.vivz, PID: 30607
03-06 09:35:50.178: E/AndroidRuntime(30607): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.vivz/com.example.vivz.MainActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.app.ActivityThread.access$800(ActivityThread.java:144)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.os.Handler.dispatchMessage(Handler.java:102)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.os.Looper.loop(Looper.java:135)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.app.ActivityThread.main(ActivityThread.java:5221)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at java.lang.reflect.Method.invoke(Native Method)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at java.lang.reflect.Method.invoke(Method.java:372)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
03-06 09:35:50.178: E/AndroidRuntime(30607): Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.support.v7.app.ActionBarActivityDelegate.onCreate(ActionBarActivityDelegate.java:151)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.support.v7.app.ActionBarActivityDelegateBase.onCreate(ActionBarActivityDelegateBase.java:138)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:123)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at com.example.vivz.MainActivity.onCreate(MainActivity.java:10)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.app.Activity.performCreate(Activity.java:5933)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)
03-06 09:35:50.178: E/AndroidRuntime(30607):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2251)
03-06 09:35:50.178: E/AndroidRuntime(30607):    ... 10 more

我的主要活动延伸 android.support.v7.app.ActionBarActivity

我的res/values/styles.xml类似于此

<resources>

    <style name="Theme.Styled" parent="Theme.AppCompat.Light.DarkActionBar">
    </style>

</resources>

我的res/values-v21/styles.xml类似于此

<!-- Activity themes -->
<style name="Theme.Styled" parent="android:Theme.Material.Light">
</style>

我的应用程序运行在带有Android 5.0.2的Nexus 7上

我的清单文件看起来像这样

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.vivz"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="21" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/Theme.Styled" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

我可以通过从res/values-v21文件夹中删除styles.xml文件来启动应用程序.

我不明白什么是错的,为什么删除我真正想要使用的一个主题的引用修复了这个问题.

我急于尝试材料时错过了什么？

Answer 1

如果您正在使用ActionBarActivity,则需要使用ThemeCompat样式.如果您使用"活动",则只能使用Theme.Material.

您仍然可以原生使用API​​ 21项目,如着色和高程,但为了使用本机材质主题,您必须使用Activity类.

但是,在使用AppCompat库时,您仍然可以使用Material UI样式:http://android-developers.blogspot.co.uk/2014/10/appcompat-v21-material-design-for-pre.html