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 1

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> 1234567 1234567

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 1

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)? 123456789101112131415161718192021222324252627282930313233 123456789101112131415161718192021222324252627282930313233

如下图所示： 

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 1

改成activity继承自Activity：

public class MainActivity extends Activity 1 1

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 1

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>