Android-帶有圖標的選項卡，未找到類

Question

我一直試圖運行此項目或從此提取ViewPagerIndicator Library。 我不知道我在複製上述項目中的代碼時錯過了什麼。 。在此先感謝^^

SampleTabsWithIcons

import android.os.Bundle; 
    import android.app.Activity; 
    import android.view.Menu; 
    import android.os.Bundle; 
    import android.support.v4.app.Fragment; 
    import android.support.v4.app.FragmentActivity; 
    import android.support.v4.app.FragmentManager; 
    import android.support.v4.app.FragmentPagerAdapter; 
    import android.support.v4.view.ViewPager; 
    import com.viewpagerindicator.IconPagerAdapter; 
    import com.viewpagerindicator.TabPageIndicator; 

    public class SampleTabsWithIcons extends FragmentActivity { 
     private static final String[] CONTENT = new String[] { "Calendar", "Camera", "Alarms", "Location" }; 
     private static final int[] ICONS = new int[] { 
       R.drawable.perm_group_calendar, 
       R.drawable.perm_group_camera, 
       R.drawable.perm_group_device_alarms, 
       R.drawable.perm_group_location, 
     }; 


     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_sample_tabs_with_icons); 

      FragmentPagerAdapter adapter = new GoogleMusicAdapter(getSupportFragmentManager()); 

      ViewPager pager = (ViewPager)findViewById(R.id.pager); 
      pager.setAdapter(adapter); 

      TabPageIndicator indicator = (TabPageIndicator)findViewById(R.id.indicator); 
      indicator.setViewPager(pager); 
     } 

     class GoogleMusicAdapter extends FragmentPagerAdapter implements IconPagerAdapter { 
      public GoogleMusicAdapter(FragmentManager fm) { 
       super(fm); 
      } 

      @Override 
      public Fragment getItem(int position) { 
       return TestFragment.newInstance(CONTENT[position % CONTENT.length]); 
      } 

      @Override 
      public CharSequence getPageTitle(int position) { 
       return CONTENT[position % CONTENT.length].toUpperCase(); 
      } 

      @Override public int getIconResId(int index) { 
       return ICONS[index]; 
      } 

      @Override 
      public int getCount() { 
       return CONTENT.length; 
      } 
     } 
    } 

activity_sample_tabs_with_icons.xml

<?xml version="1.0" encoding="utf-8"?> 

<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent"> 

    <com.viewpagerindicator.TabPageIndicator 
     android:id="@+id/indicator" 
     android:layout_height="wrap_content" 
     android:layout_width="fill_parent" 
     /> 
    <android.support.v4.view.ViewPager 
     android:id="@+id/pager" 
     android:layout_width="fill_parent" 
     android:layout_height="0dp" 
     android:layout_weight="1" 
     /> 

</LinearLayout> 

logcat的：

07-12 09:56:22.045: E/AndroidRuntime(15435): FATAL EXCEPTION: main 
07-12 09:56:22.045: E/AndroidRuntime(15435): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.tabwithicon/com.example.tabwithicon.SampleTabsWithIcons}: java.lang.ClassNotFoundException: com.example.tabwithicon.SampleTabsWithIcons 
07-12 09:56:22.045: E/AndroidRuntime(15435): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1983) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at android.app.ActivityThread.access$600(ActivityThread.java:130) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at android.os.Handler.dispatchMessage(Handler.java:99) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at android.os.Looper.loop(Looper.java:137) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at android.app.ActivityThread.main(ActivityThread.java:4745) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at java.lang.reflect.Method.invokeNative(Native Method) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at java.lang.reflect.Method.invoke(Method.java:511) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at dalvik.system.NativeStart.main(Native Method) 
07-12 09:56:22.045: E/AndroidRuntime(15435): Caused by: java.lang.ClassNotFoundException: com.example.tabwithicon.SampleTabsWithIcons 
07-12 09:56:22.045: E/AndroidRuntime(15435): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at java.lang.ClassLoader.loadClass(ClassLoader.java:501) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at java.lang.ClassLoader.loadClass(ClassLoader.java:461) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at android.app.Instrumentation.newActivity(Instrumentation.java:1053) 
07-12 09:56:22.045: E/AndroidRuntime(15435): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1974) 
07-12 09:56:22.045: E/AndroidRuntime(15435): ... 11 more 

這裏的結構：

logcat的：

07-12 10:32:27.415: W/dalvikvm(15756): Unable to resolve superclass of Lcom/example/tabwithicon/SampleTabsWithIcons; (18) 
07-12 10:32:27.418: W/dalvikvm(15756): Link of class 'Lcom/example/tabwithicon/SampleTabsWithIcons;' failed 
07-12 10:32:27.419: D/AndroidRuntime(15756): Shutting down VM 
07-12 10:32:27.422: W/dalvikvm(15756): threadid=1: thread exiting with uncaught exception (group=0x41989300) 

Answer 1

錯誤在你的logcat是ClassNotFoundException。看行...

Caused by: java.lang.ClassNotFoundException: com.example.tabwithicon.SampleTabsWithIcons 

你有類，所以它也許應該是package declaration。檢查您是否在應用程序中定義了正確的軟件包。

您的包被定義爲com.example.tabwithicon。檢查這是否是正確的包裝。