我的应用程序使用应用内搜索，根据每个请求动态构建搜索建议，将它们放入 MatrixCursor 中并返回要显示的建议。有关搜索建议的信息请参见此处:
http://developer.android.com/guide/topics/search/adding-custom-suggestions.html
这在 2.1-update1 中工作得很好，但是当我将其加载到 2.2 手机上时，当我尝试搜索时出现 fatal error 。以下是相关日志:
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): error changing cursor and caching columns
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): java.lang.NumberFormatException: My String Message
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at java.lang.Long.parse(Long.java:364)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at java.lang.Long.parseLong(Long.java:354)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at java.lang.Long.parseLong(Long.java:320)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.database.MatrixCursor.getLong(MatrixCursor.java:255)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.database.CursorWrapper.getLong(CursorWrapper.java:127)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.widget.CursorAdapter.getItemId(CursorAdapter.java:156)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.widget.AutoCompleteTextView.buildDropDown(AutoCompleteTextView.java:1248)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.widget.AutoCompleteTextView.showDropDown(AutoCompleteTextView.java:1137)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.widget.AutoCompleteTextView.updateDropDownForFilter(AutoCompleteTextView.java:1019)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.widget.AutoCompleteTextView.onFilterComplete(AutoCompleteTextView.java:1002)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.app.SearchDialog.onDataSetChanged(SearchDialog.java:612)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.app.SuggestionsAdapter.notifyDataSetChanged(SuggestionsAdapter.java:193)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.widget.CursorAdapter.changeCursor(CursorAdapter.java:260)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.app.SuggestionsAdapter.changeCursor(SuggestionsAdapter.java:238)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.widget.CursorFilter.publishResults(CursorFilter.java:67)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.widget.Filter$ResultsHandler.handleMessage(Filter.java:282)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.os.Handler.dispatchMessage(Handler.java:99)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.os.Looper.loop(Looper.java:123)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at android.app.ActivityThread.main(ActivityThread.java:4627)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at java.lang.reflect.Method.invokeNative(Native Method)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at java.lang.reflect.Method.invoke(Method.java:521)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-22 12:13:05.935: ERROR/SuggestionsAdapter(1028): at dalvik.system.NativeStart.main(Native Method)
07-22 12:13:05.935: DEBUG/AndroidRuntime(1028): Shutting down VM
07-22 12:13:05.935: WARN/dalvikvm(1028): threadid=1: thread exiting with uncaught exception (group=0x4001d7f0)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): FATAL EXCEPTION: main
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): java.lang.NumberFormatException: My String Message
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at java.lang.Long.parse(Long.java:364)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at java.lang.Long.parseLong(Long.java:354)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at java.lang.Long.parseLong(Long.java:320)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at android.database.MatrixCursor.getLong(MatrixCursor.java:255)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at android.database.CursorWrapper.getLong(CursorWrapper.java:127)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at android.widget.CursorAdapter.getItemId(CursorAdapter.java:156)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at android.widget.AutoCompleteTextView.buildDropDown(AutoCompleteTextView.java:1248)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at android.widget.AutoCompleteTextView.showDropDown(AutoCompleteTextView.java:1137)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at android.widget.AutoCompleteTextView.updateDropDownForFilter(AutoCompleteTextView.java:1019)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at android.widget.AutoCompleteTextView.onFilterComplete(AutoCompleteTextView.java:1002)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at android.widget.Filter$ResultsHandler.handleMessage(Filter.java:285)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at android.os.Handler.dispatchMessage(Handler.java:99)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at android.os.Looper.loop(Looper.java:123)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at android.app.ActivityThread.main(ActivityThread.java:4627)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at java.lang.reflect.Method.invokeNative(Native Method)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at java.lang.reflect.Method.invoke(Method.java:521)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
07-22 12:13:05.945: ERROR/AndroidRuntime(1028): at dalvik.system.NativeStart.main(Native Method)
其中“My String Message”是作为游标中的建议返回的第一行(仅在本例中)的 SUGGEST_COLUMN_TEXT_1 字段的值。堆栈跟踪根本不会触及我的代码，并且在调试器中跟踪它显示在我在搜索建议内容提供程序中返回建议光标后一段时间发生错误。
为什么他们的适配器突然尝试将 String 解释为 Long？还有其他人遇到过这种情况吗？
谢谢!
最佳答案
代码在尝试访问任何搜索建议游标中所需的 ID 列(“_id”)时失败，并且必须为长整型。
是否有可能您没有包含该列，或者您正在创建该列，但无意中将字符串写入其中？
参见http://developer.android.com/guide/topics/search/adding-custom-suggestions.html#SuggestionTable
关于android - 2.2 中搜索建议失败，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/3321047/