PreferenceActivity越来越接近我第二次启动应用程序

Question

这是我的.java代码

public class MainHelp extends PreferenceActivity { 

     @Override 
     public void onCreate(Bundle savedInstanceState){ 
      super.onCreate(savedInstanceState); 
       addPreferencesFromResource(R.xml.help_main); 
      } 
     } 

，这是布局

<?xml version="1.0" encoding="utf-8"?> 
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" > 

    <Preference 
     android:title="Commands Documentation" 
     android:key="@string/commands"/> 

    <Preference 
     android:title = "How To Use" 
     android:key="@string/howToUse"/> 
    <Preference 
     android:title="Write Us" 
     android:key="@string/writeUs"/> 
    <Preference 
     android:title="About" 
     android:key="@string/aboutSuppApp"/> 
</PreferenceScreen> 

当我运行上面的代码工作完美的计划.. ..但，当我打的主页按钮，并尝试去这个活动，我得到错误说

E/AndroidRuntime( 495): Uncaught handler: thread main exiting due to uncaught exception 
E/AndroidRuntime( 495): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.suppapp/com.suppapp.help.MainHelp}: android.view.InflateException: Binary XML file line #10: Error inflating class prferences 
    E/AndroidRuntime( 495): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496) 
    E/AndroidRuntime( 495): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512) 
    E/AndroidRuntime( 495): at android.app.ActivityThread.access$2200(ActivityThread.java:119) 
    E/AndroidRuntime( 495): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863) 
    E/AndroidRuntime( 495): at android.os.Handler.dispatchMessage(Handler.java:99) 
    E/AndroidRuntime( 495): at android.os.Looper.loop(Looper.java:123) 
    E/AndroidRuntime( 495): at android.app.ActivityThread.main(ActivityThread.java:4363) 
    E/AndroidRuntime( 495): at java.lang.reflect.Method.invokeNative(Native Method) 
    E/AndroidRuntime( 495): at java.lang.reflect.Method.invoke(Method.java:521) 
    E/AndroidRuntime( 495): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 
    E/AndroidRuntime( 495): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 
    E/AndroidRuntime( 495): at dalvik.system.NativeStart.main(Native Method) 
    E/AndroidRuntime( 495): Caused by: android.view.InflateException: Binary XML file line #10: Error inflating class prferences 
    E/AndroidRuntime( 495): at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:441) 
    E/AndroidRuntime( 495): at android.preference.GenericInflater.rInflate(GenericInflater.java:481) 
    E/AndroidRuntime( 495): at android.preference.GenericInflater.inflate(GenericInflater.java:326) 
    E/AndroidRuntime( 495): at android.preference.GenericInflater.inflate(GenericInflater.java:263) 
    E/AndroidRuntime( 495): at android.preference.PreferenceManager.inflateFromResource(PreferenceManager.java:254) 
    E/AndroidRuntime( 495): at android.preference.PreferenceActivity.addPreferencesFromResource(PreferenceActivity.java:253) 
    E/AndroidRuntime( 495): at com.suppapp.help.MainHelp.onCreate(MainHelp.java:19) 
    E/AndroidRuntime( 495): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
    E/AndroidRuntime( 495): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459) 
    E/AndroidRuntime( 495): ... 11 more 
    E/AndroidRuntime( 495): Caused by: java.lang.ClassNotFoundException: android.preference.prferences in loader dalvik.system.PathClassLoader@44c06600 
    E/AndroidRuntime( 495): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243) 
    E/AndroidRuntime( 495): at java.lang.ClassLoader.loadClass(ClassLoader.java:573) 
    E/AndroidRuntime( 495): at java.lang.ClassLoader.loadClass(ClassLoader.java:532) 
    E/AndroidRuntime( 495): at android.preference.GenericInflater.createItem(GenericInflater.java:375) 
    E/AndroidRuntime( 495): at android.preference.GenericInflater.onCreateItem(GenericInflater.java:417) 
    E/AndroidRuntime( 495): at android.preference.GenericInflater.createItemFromTag(GenericInflater.java:428) 
    E/AndroidRuntime( 495): ... 19 more 

我试图将我的ACTI与其他.xml文件vity，但再次获得相同的错误！甚至导致：android.view.InflateException：二进制XML文件行＃10：错误膨胀类别prferences显示其他.xml文件相同的行号（＃10）

Answer 1

我改变了version code（manifest文件）和重新 - 安装了应用程序...现在工作正常。