我正在尝试从Android SDK教程中实现“标签布局”示例： http://developer.android.com/resources/tutorials/views/hello-tabwidget.html
我注意到很多人在实现这个问题时遇到了问题。我想我已经阅读了google / stackoverflow上的所有可能的链接并尝试/检查了所有内容，但仍无法使其正常工作。我仍然继续收到错误“应用程序Hello Tab Widget意外停止。请再试一次。”在发布会上。
我在这里上传了整个项目（Android 2.3.3）： https://www.yousendit.com/download/VnBxak85UnFCSnF4dnc9PQ
此外，这是清单文件：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.kaushal.hellotabwidget"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".hellotabwidget"
android:label="@string/app_name">
<!-- 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>
<activity android:name=".AlbumsActivity"></activity>
<activity android:name=".ArtistsActivity"></activity>
<activity android:name=".SongsActivity"></activity>
</application>
</manifest>
HelloTabWidget.java文件，
package com.kaushal.hellotabwidget;
import android.app.TabActivity;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.widget.TabHost;
public class HelloTabWidget extends TabActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Resources res = getResources(); // Resource object to get Drawables
TabHost tabHost = getTabHost(); // The activity TabHost
TabHost.TabSpec spec; // Resusable TabSpec for each tab
Intent intent; // Reusable Intent for each tab
// Create an Intent to launch an Activity for the tab (to be reused)
intent = new Intent().setClass(this, ArtistsActivity.class);
// Initialize a TabSpec for each tab and add it to the TabHost
spec = tabHost.newTabSpec("artists").setIndicator("Artists",
res.getDrawable(R.drawable.ic_tab_artists))
.setContent(intent);
tabHost.addTab(spec);
// Do the same for the other tabs
intent = new Intent().setClass(this, AlbumsActivity.class);
spec = tabHost.newTabSpec("albums").setIndicator("Albums",
res.getDrawable(R.drawable.ic_tab_albums))
.setContent(intent);
tabHost.addTab(spec);
intent = new Intent().setClass(this, SongsActivity.class);
spec = tabHost.newTabSpec("songs").setIndicator("Songs",
res.getDrawable(R.drawable.ic_tab_songs))
.setContent(intent);
tabHost.addTab(spec);
tabHost.setCurrentTab(0);
}
}
应用程序启动时的示例logcat，
04-25 13:10:42.105 D/AndroidRuntime( 671):
04-25 13:10:42.105 D/AndroidRuntime( 671): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
04-25 13:10:42.105 D/AndroidRuntime( 671): CheckJNI is ON
04-25 13:10:43.135 D/AndroidRuntime( 671): Calling main entry com.android.commands.pm.Pm
04-25 13:10:43.195 D/AndroidRuntime( 671): Shutting down VM
04-25 13:10:43.215 I/AndroidRuntime( 671): NOTE: attach of thread 'Binder Thread #3' failed
04-25 13:10:43.215 D/dalvikvm( 671): GC_CONCURRENT freed 100K, 72% free 296K/1024K, external 0K/0K, paused 3ms+5ms
04-25 13:10:43.225 D/jdwp ( 671): adbd disconnected
04-25 13:10:43.975 D/AndroidRuntime( 681):
04-25 13:10:43.975 D/AndroidRuntime( 681): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
04-25 13:10:43.975 D/AndroidRuntime( 681): CheckJNI is ON
04-25 13:10:45.065 D/AndroidRuntime( 681): Calling main entry com.android.commands.am.Am
04-25 13:10:45.135 I/ActivityManager( 67): Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] flg=0x10000000 cmp=com.kaushal.hellotabwidget/.hellotabwidget } from pid 681
04-25 13:10:45.205 D/AndroidRuntime( 681): Shutting down VM
04-25 13:10:45.285 I/AndroidRuntime( 681): NOTE: attach of thread 'Binder Thread #3' failed
04-25 13:10:45.315 D/dalvikvm( 681): GC_CONCURRENT freed 101K, 69% free 318K/1024K, external 0K/0K, paused 3ms+84ms
04-25 13:10:45.385 D/jdwp ( 681): adbd disconnected
04-25 13:10:45.456 I/ActivityManager( 67): Start proc com.kaushal.hellotabwidget for activity com.kaushal.hellotabwidget/.hellotabwidget: pid=690 uid=10037 gids={1015}
04-25 13:10:46.815 D/AndroidRuntime( 690): Shutting down VM
04-25 13:10:46.815 W/dalvikvm( 690): threadid=1: thread exiting with uncaught exception (group=0x40015560)
04-25 13:10:46.845 E/AndroidRuntime( 690): FATAL EXCEPTION: main
04-25 13:10:46.845 E/AndroidRuntime( 690): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.kaushal.hellotabwidget/com.kaushal.hellotabwidget.hellotabwidget}: java.lang.ClassNotFoundException: com.kaushal.hellotabwidget.hellotabwidget in loader dalvik.system.PathClassLoader[/data/app/com.kaushal.hellotabwidget-2.apk]
04-25 13:10:46.845 E/AndroidRuntime( 690): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)
04-25 13:10:46.845 E/AndroidRuntime( 690): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
04-25 13:10:46.845 E/AndroidRuntime( 690): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
04-25 13:10:46.845 E/AndroidRuntime( 690): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
04-25 13:10:46.845 E/AndroidRuntime( 690): at android.os.Handler.dispatchMessage(Handler.java:99)
04-25 13:10:46.845 E/AndroidRuntime( 690): at android.os.Looper.loop(Looper.java:123)
04-25 13:10:46.845 E/AndroidRuntime( 690): at android.app.ActivityThread.main(ActivityThread.java:3683)
04-25 13:10:46.845 E/AndroidRuntime( 690): at java.lang.reflect.Method.invokeNative(Native Method)
04-25 13:10:46.845 E/AndroidRuntime( 690): at java.lang.reflect.Method.invoke(Method.java:507)
04-25 13:10:46.845 E/AndroidRuntime( 690): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
04-25 13:10:46.845 E/AndroidRuntime( 690): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
04-25 13:10:46.845 E/AndroidRuntime( 690): at dalvik.system.NativeStart.main(Native Method)
04-25 13:10:46.845 E/AndroidRuntime( 690): Caused by: java.lang.ClassNotFoundException: com.kaushal.hellotabwidget.hellotabwidget in loader dalvik.system.PathClassLoader[/data/app/com.kaushal.hellotabwidget-2.apk]
04-25 13:10:46.845 E/AndroidRuntime( 690): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
04-25 13:10:46.845 E/AndroidRuntime( 690): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
04-25 13:10:46.845 E/AndroidRuntime( 690): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
04-25 13:10:46.845 E/AndroidRuntime( 690): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
04-25 13:10:46.845 E/AndroidRuntime( 690): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)
04-25 13:10:46.845 E/AndroidRuntime( 690): ... 11 more
04-25 13:10:46.855 W/ActivityManager( 67): Force finishing activity com.kaushal.hellotabwidget/.hellotabwidget
04-25 13:10:47.375 W/ActivityManager( 67): Activity pause timeout for HistoryRecord{40745f70 com.kaushal.hellotabwidget/.hellotabwidget}
04-25 13:10:58.235 W/ActivityManager( 67): Activity destroy timeout for HistoryRecord{40745f70 com.kaushal.hellotabwidget/.hellotabwidget}
04-25 13:11:05.205 D/dalvikvm( 67): GC_CONCURRENT freed 515K, 42% free 4437K/7623K, external 884K/1297K, paused 10ms+10ms
0
请告诉我这里我做错了什么。一直试图解决这个问题超过一天但是无法使其发挥作用。
这是我第一次发布Stackoverflow。如果我错过任何发布规则，请原谅我:)。感谢所有人的帮助。
答案 0 :(得分：3)
在你的清单中，替换：
<activity android:name=".hellotabwidget"
使用：
<activity android:name=".HelloTabWidget"
活动名称区分大小写（毕竟它们是类名）。