【发布时间】：2014-08-03 07:43:43
【问题描述】：
嘿，我正在学习 android，并且在 sqLite 数据库中遇到了一些问题。我想通过光标从列中获取一组特定的行并将其存储在字符串数组中以在 textview 中显示。这是我用来获取光标数据的方法
public String[] getDetailedSymps(long sympId) {
String[] columns2 = new String[] { KEY_SYMP_DETAIL, KEY_SYM_ID };
String details[]= new String[9];
int i=0;
Cursor c3 = ourDatabase.query(DATABASE_TABLE2, columns2, KEY_SYM_ID + "=" + sympId, null, null, null, null);
int iDetail = c3.getColumnIndex(KEY_SYMP_DETAIL);
while (c3.isAfterLast() == false) {
details[i]= c3.getString(iDetail);
i++;
c3.moveToNext();
}
return details;
但是，当我运行代码时，它给了我错误 CursorIndexOutOfBoundException,: index -1 requested with a size of 9, here is the logcat
08-03 03:22:06.294: W/dalvikvm(1194): threadid=1: thread exiting with uncaught exception (group=0xb4ae2ba8)
08-03 03:22:06.464: E/AndroidRuntime(1194): FATAL EXCEPTION: main
08-03 03:22:06.464: E/AndroidRuntime(1194): Process: com.example.mydb, PID: 1194
08-03 03:22:06.464: E/AndroidRuntime(1194): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mydb/com.example.mydb.DetailActivity}: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 9
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.app.ActivityThread.access$800(ActivityThread.java:135)
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.os.Handler.dispatchMessage(Handler.java:102)
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.os.Looper.loop(Looper.java:136)
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.app.ActivityThread.main(ActivityThread.java:5017)
08-03 03:22:06.464: E/AndroidRuntime(1194): at java.lang.reflect.Method.invokeNative(Native Method)
08-03 03:22:06.464: E/AndroidRuntime(1194): at java.lang.reflect.Method.invoke(Method.java:515)
08-03 03:22:06.464: E/AndroidRuntime(1194): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
08-03 03:22:06.464: E/AndroidRuntime(1194): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
08-03 03:22:06.464: E/AndroidRuntime(1194): at dalvik.system.NativeStart.main(Native Method)
08-03 03:22:06.464: E/AndroidRuntime(1194): Caused by: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 9
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:426)
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136)
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50)
08-03 03:22:06.464: E/AndroidRuntime(1194): at com.example.mydb.Dbadapter.getDetailedSymps(Dbadapter.java:296)
08-03 03:22:06.464: E/AndroidRuntime(1194): at com.example.mydb.DetailActivity.onCreate(DetailActivity.java:25)
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.app.Activity.performCreate(Activity.java:5231)
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
08-03 03:22:06.464: E/AndroidRuntime(1194): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
谁能帮忙，我在这里做错了什么，在此先感谢。
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