在这里，我制作了自己的主屏幕启动器，当我在屏幕上长按时，我会得到一个包含选择选项（如小部件和快捷方式等）的对话框。因此，当我选择小部件时，我会得到另一个对话框，如内置应用程序小部件。当我选择任何要加载的小部件时，我遇到了问题
我参考Android 2.3源代码实现了整个代码。
在这段代码中我有自己的内容提供者。当我访问它的覆盖方法时insert从另一个类使用ContentResolver所以当我运行这个程序时，它会给我错误，就像下面提到的那样，我通过这段代码使用了这个东西
代码 ：
这里通知值是假的。
Uri result = cr.insert(notify ? LauncherSettings.Favorites.CONTENT_URI :
LauncherSettings.Favorites.CONTENT_URI_NO_NOTIFICATION, values);
Error
11-21 11:23:50.309: E/ActivityThread(4727): Failed to find provider info for com.test.launcher.settings
11-21 11:23:50.549: D/AndroidRuntime(4727): Shutting down VM
11-21 11:23:50.549: W/dalvikvm(4727): threadid=1: thread exiting with uncaught exception (group=0x40018578)
11-21 11:23:50.589: E/AndroidRuntime(4727): FATAL EXCEPTION: main
11-21 11:23:50.589: E/AndroidRuntime(4727): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=9, result=-1, data=Intent { (has extras) }} to activity {com.test.launcher/com.test.launcher.Launcher}: java.lang.IllegalArgumentException: Unknown URL content://com.test.launcher.settings/favorites?notify=false
11-21 11:23:50.589: E/AndroidRuntime(4727): at android.app.ActivityThread.deliverResults(ActivityThread.java:2536)
11-21 11:23:50.589: E/AndroidRuntime(4727): at android.app.ActivityThread.handleSendResult(ActivityThread.java:2578)
11-21 11:23:50.589: E/AndroidRuntime(4727): at android.app.ActivityThread.access$2000(ActivityThread.java:117)
11-21 11:23:50.589: E/AndroidRuntime(4727): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:965)
11-21 11:23:50.589: E/AndroidRuntime(4727): at android.os.Handler.dispatchMessage(Handler.java:99)
11-21 11:23:50.589: E/AndroidRuntime(4727): at android.os.Looper.loop(Looper.java:130)
11-21 11:23:50.589: E/AndroidRuntime(4727): at android.app.ActivityThread.main(ActivityThread.java:3687)
11-21 11:23:50.589: E/AndroidRuntime(4727): at java.lang.reflect.Method.invokeNative(Native Method)
11-21 11:23:50.589: E/AndroidRuntime(4727): at java.lang.reflect.Method.invoke(Method.java:507)
11-21 11:23:50.589: E/AndroidRuntime(4727): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
11-21 11:23:50.589: E/AndroidRuntime(4727): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
11-21 11:23:50.589: E/AndroidRuntime(4727): at dalvik.system.NativeStart.main(Native Method)
11-21 11:23:50.589: E/AndroidRuntime(4727): Caused by: java.lang.IllegalArgumentException: Unknown URL content://com.test.launcher.settings/favorites?notify=false
11-21 11:23:50.589: E/AndroidRuntime(4727): at android.content.ContentResolver.insert(ContentResolver.java:600)
11-21 11:23:50.589: E/AndroidRuntime(4727): at com.test.launcher.Launcher.addItemToDatabase(Launcher.java:420)
11-21 11:23:50.589: E/AndroidRuntime(4727): at com.test.launcher.Launcher.completeAddAppWidget(Launcher.java:369)
11-21 11:23:50.589: E/AndroidRuntime(4727): at com.test.launcher.Launcher.onActivityResult(Launcher.java:154)
11-21 11:23:50.589: E/AndroidRuntime(4727): at com.test.launcher.Launcher.addAppWidget(Launcher.java:308)
11-21 11:23:50.589: E/AndroidRuntime(4727): at com.test.launcher.Launcher.onActivityResult(Launcher.java:151)
11-21 11:23:50.589: E/AndroidRuntime(4727): at android.app.Activity.dispatchActivityResult(Activity.java:3908)
11-21 11:23:50.589: E/AndroidRuntime(4727): at android.app.ActivityThread.deliverResults(ActivityThread.java:2532)
11-21 11:23:50.589: E/AndroidRuntime(4727): ... 11 more
您需要在清单文件中提及您的提供商，
Refer provider http://developer.android.com/guide/topics/manifest/provider-element.html,
用于数据库操作的简单内容提供程序 http://myandroidnote.blogspot.com/2011/11/at-last-i-concluded-it-is.html
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