Android 解决错误：You need to use a Theme.AppCompat theme (or descendant) with this activity

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原文地址：http://blog.csdn.net/ouyang_peng

#1、错误描述

今天,想实现Activity不显示标题栏的效果，在项目的AndroidManifest.xml文件，对相应的Activity添加属性

 android:theme="@android:style/Theme.NoTitleBar"1
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具体代码如下：

<activity android:name=".module.view.activity.KuwoMusicPlayActivity"            android:theme="@android:style/Theme.NoTitleBar">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter></activity>1
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结果运行app的时候，报了如下错误：

java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.1
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具体错误log如下：

01-01 01:33:41.950 6637-6637/com.xtc.kuwo E/AndroidRuntime: FATAL EXCEPTION: main                                                            Process: com.xtc.kuwo, PID: 6637                                                            java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xtc.kuwo/com.xtc.kuwo.module.view.activity.KuwoMusicPlayActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.                                                                at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)                                                                at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)                                                                at android.app.ActivityThread.access$800(ActivityThread.java:151)                                                                at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)                                                                at android.os.Handler.dispatchMessage(Handler.java:102)                                                                at android.os.Looper.loop(Looper.java:135)                                                                at android.app.ActivityThread.main(ActivityThread.java:5254)                                                                at java.lang.reflect.Method.invoke(Native Method)                                                                at java.lang.reflect.Method.invoke(Method.java:372)                                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:955)                                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:750)                                                             Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.                                                                at android.support.v7.app.AppCompatDelegateImplV7.createSubDecor(AppCompatDelegateImplV7.java:340)                                                                at android.support.v7.app.AppCompatDelegateImplV7.ensureSubDecor(AppCompatDelegateImplV7.java:309)                                                                at android.support.v7.app.AppCompatDelegateImplV7.setContentView(AppCompatDelegateImplV7.java:273)                                                                at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:136)                                                                at com.xtc.kuwo.module.view.activity.KuwoMusicPlayActivity.onCreate(KuwoMusicPlayActivity.java:57)                                                                at android.app.Activity.performCreate(Activity.java:5990)                                                                at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)                                                                at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)                                                                at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)?                                                                at android.app.ActivityThread.access$800(ActivityThread.java:151)?                                                                at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)?                                                                at android.os.Handler.dispatchMessage(Handler.java:102)?                                                                at android.os.Looper.loop(Looper.java:135)?                                                                at android.app.ActivityThread.main(ActivityThread.java:5254)?                                                                at java.lang.reflect.Method.invoke(Native Method)?                                                                at java.lang.reflect.Method.invoke(Method.java:372)?                                                                at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:955)?                                                                at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:750)?1
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如下图所示：
这里写图片描述

2、错误分析

原来我的Activity继承自 Android.support.v7.app.AppCompatActivity，而不是 android.app.Activity。

3、解决方法

方法1：

创建的activity时，如果不是那么强烈需要继承自AppCompatActivity，就直接继承Activity。
如将activity继承自AppCompatActivity：

public class MainActivity extends ActionBarActivity 1
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改成activity继承自Activity：

public class MainActivity extends Activity1
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方法2：

还是想继承自AppCompatActivity，那么根据提示来使用AppCompat的theme，即将AndroidManifest.xml文件中关于Activity的主题配置改成：

android:theme="@style/Theme.AppCompat.Light.NoActionBar"1
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完整代码如下：

<activity android:name=".module.view.activity.KuwoMusicPlayActivity"            android:theme="@style/Theme.AppCompat.Light.NoActionBar">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter></activity>

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