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android - 如何从SQLite表读取一行的多个记录？

我有一个数据库叫做test_数据库。
我有一张桌子叫tbl_marks。
在tbl_marks中有以下行：
_身份证
名称
子ID
格威治
资料
共有4个条目。两个带子id 1，另一个带子id 2。
现在我要做的是：

SELECT * FROM tbl_marks WHERE subid = 1;

最后，我喜欢在列表视图中列出所有subid1、2、3或其他标记。
我怎么能用光标来做呢？
我试着通过一个教程来学习，但是失败了…
Higherpass Android Tutorial Accessing-Data-With-Android-Cursors
Anddev Working with the sqlite database - Cursors
代码：注释部分是我之前得到的（它列出了所有内容）
private void fillData() {
    // Get all of the notes from the database and create the item list

    mDbHelper.open_database_rw();
    Cursor mCursor = db.rawQuery("SELECT _id, subid, name, mark, gewicht, datum FROM tbl_marks ORDER BY subid;", null);
    startManagingCursor(mCursor);
    if (mCursor != null) {
         int intName = mCursor.getColumnIndexOrThrow("subid");

          do {
              teststring = mCursor.getString(intName);

              String[] from = new String[] { dbHelper.KEY_NAME_MARKS, dbHelper.KEY_MARK_MARKS, dbHelper.KEY_GEWICHT_MARKS, dbHelper.KEY_DATUM_MARKS};
              int[] to = new int[] {R.id.txt_marks_row, R.id.txt_note, R.id.txt_gewicht, R.id.txt_datum};


              SimpleCursorAdapter notes = new SimpleCursorAdapter(this, R.layout.show_marks, mCursor, from, to);
              setListAdapter(notes);
          } while (mCursor.moveToNext());

    }

LogCat说，柱子ID不存在。但它在那里，数据库已经打开了。
02-07 11:30:00.500: D/dalvikvm(9913): GC_EXTERNAL_ALLOC freed 54K, 50% free 2694K/5379K, external 0K/0K, paused 56ms
02-07 11:30:00.535: D/dalvikvm(9913): GC_EXTERNAL_ALLOC freed 4K, 50% free 2698K/5379K, external 13K/523K, paused 27ms
02-07 11:30:10.457: D/AndroidRuntime(9913): Shutting down VM
02-07 11:30:10.457: W/dalvikvm(9913): threadid=1: thread exiting with uncaught exception (group=0x40235568)
02-07 11:30:10.457: E/AndroidRuntime(9913): FATAL EXCEPTION: main
02-07 11:30:10.457: E/AndroidRuntime(9913): java.lang.RuntimeException: Unable to start activity ComponentInfo{test.marco.notenha/test.marco.notenha.mark}: java.lang.IllegalArgumentException: column 'subid' does not exist
02-07 11:30:10.457: E/AndroidRuntime(9913):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1664)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1680)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at android.os.Handler.dispatchMessage(Handler.java:99)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at android.os.Looper.loop(Looper.java:130)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at android.app.ActivityThread.main(ActivityThread.java:3703)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at java.lang.reflect.Method.invokeNative(Native Method)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at java.lang.reflect.Method.invoke(Method.java:507)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at dalvik.system.NativeStart.main(Native Method)
02-07 11:30:10.457: E/AndroidRuntime(9913): Caused by: java.lang.IllegalArgumentException: column 'subid' does not exist
02-07 11:30:10.457: E/AndroidRuntime(9913):     at android.database.AbstractCursor.getColumnIndexOrThrow(AbstractCursor.java:314)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at test.marco.notenha.mark.fillData(mark.java:180)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at test.marco.notenha.mark.onCreate(mark.java:70)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-07 11:30:10.457: E/AndroidRuntime(9913):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1628)
02-07 11:30:10.457: E/AndroidRuntime(9913):     ... 11 more

这是第180行：int intname=mcursor.getColumnIndexOrthRow（“subid”）；
02-07 11:52:26.304: D/dalvikvm(10075): GC_EXTERNAL_ALLOC freed 48K, 50% free 2694K/5379K, external 0K/0K, paused 38ms
02-07 11:52:26.339: D/dalvikvm(10075): GC_EXTERNAL_ALLOC freed 4K, 50% free 2698K/5379K, external 13K/523K, paused 30ms
02-07 11:52:29.433: D/AndroidRuntime(10075): Shutting down VM
02-07 11:52:29.433: W/dalvikvm(10075): threadid=1: thread exiting with uncaught exception (group=0x40235568)
02-07 11:52:29.437: E/AndroidRuntime(10075): FATAL EXCEPTION: main
02-07 11:52:29.437: E/AndroidRuntime(10075): java.lang.RuntimeException: Unable to start activity ComponentInfo{test.marco.notenha/test.marco.notenha.mark}: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 3
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1664)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1680)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.os.Handler.dispatchMessage(Handler.java:99)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.os.Looper.loop(Looper.java:130)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.app.ActivityThread.main(ActivityThread.java:3703)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at java.lang.reflect.Method.invokeNative(Native Method)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at java.lang.reflect.Method.invoke(Method.java:507)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at dalvik.system.NativeStart.main(Native Method)
02-07 11:52:29.437: E/AndroidRuntime(10075): Caused by: android.database.CursorIndexOutOfBoundsException: Index -1 requested, with a size of 3
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.database.AbstractCursor.checkPosition(AbstractCursor.java:580)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:214)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:41)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at test.marco.notenha.mark.fillData(mark.java:183)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at test.marco.notenha.mark.onCreate(mark.java:70)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
02-07 11:52:29.437: E/AndroidRuntime(10075):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1628)
02-07 11:52:29.437: E/AndroidRuntime(10075):    ... 11 more

最佳答案

“subid”列必须在“选择列”列表中，以便mcursor.getColumnIndexOrthRow（“subid”）调用返回它：

SELECT _id, name, mark, gewicht, datum, subid FROM tbl_marks ORDER BY subid;

编辑：
现在需要调用mcursor.moveToFirst（）并检查它是否返回“true”（即结果列表不是空的）。见this question。例如：
if (mCursor != null && mCursor.moveToFirst()) {
    int intName = mCursor.getColumnIndexOrThrow("subid");
    do {
          teststring = mCursor.getString(intName);

          ...
    } while (mCursor.moveToNext());
}

关于android - 如何从SQLite表读取一行的多个记录？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/9174230/

10-10 22:47
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