Question

我的应用程序中出现以下错误消息：

05-13 09:05:53.218: E/AndroidRuntime(5339): FATAL EXCEPTION: main
05-13 09:05:53.218: E/AndroidRuntime(5339): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.unserekinder/com.example.unserekinder.Ereignisse}: java.lang.IllegalStateException: Couldn't read row 1, col -1 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it.
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.app.ActivityThread.access$600(ActivityThread.java:141)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.os.Handler.dispatchMessage(Handler.java:99)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.os.Looper.loop(Looper.java:137)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.app.ActivityThread.main(ActivityThread.java:5041)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at java.lang.reflect.Method.invokeNative(Native Method)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at java.lang.reflect.Method.invoke(Method.java:511)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at dalvik.system.NativeStart.main(Native Method)
05-13 09:05:53.218: E/AndroidRuntime(5339): Caused by: java.lang.IllegalStateException: Couldn't read row 1, col -1 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it.
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.database.CursorWindow.nativeGetString(Native Method)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.database.CursorWindow.getString(CursorWindow.java:434)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at com.example.unserekinder.Ereignisse.datenfuerlistviewereignis(Ereignisse.java:49)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at com.example.unserekinder.Ereignisse.onCreate(Ereignisse.java:28)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.app.Activity.performCreate(Activity.java:5104)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
05-13 09:05:53.218: E/AndroidRuntime(5339):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
05-13 09:05:53.218: E/AndroidRuntime(5339):     ... 11 more

我的表格如下：

public static final String ereignisid = "id";
public static final String TABLE_NAME_EREIGNIS="ereignis";
public static final String EREIGNISNAME = "ereignisname";
public static final String EREIGNISZEIT = "ereigniszeit";
public static final String EREIGNISGENAUERES = "ereignisgenaueres";
public static final String KINDID = "kindid";

private static final String TABLE_EREIGNIS_CREATE = "CREATE TABLE IF NOT EXISTS " + TABLE_NAME_EREIGNIS + " (" + ereignisid + " INTEGER PRIMARY KEY AUTOINCREMENT, "
        + EREIGNISNAME + " TEXT, " + EREIGNISZEIT + " TEXT, " + EREIGNISGENAUERES + " TEXT, " + KINDID + " INTEGER, FOREIGN KEY (" + KINDID + ") REFERENCES " + TABLE_NAME_Kind + "(" + id + "));";

这是发生错误的函数：

private ArrayList<Ereignis> datenfuerlistviewereignis(){
        DBHelper db = new DBHelper(this);
        ArrayList<Ereignis> arr = new ArrayList<Ereignis>();
        ListView lv = (ListView) findViewById(R.id.lvEreignisse);
        id = getIntent().getIntExtra("kinderid", 0);
        System.out.println("SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSss" + id);
        Cursor c = db.selectEreignis(id);
        c.moveToFirst();
        int count = c.getCount();
        int i = 0;

        while(c.moveToNext())
        { 


 // here happens the error!
                arr.add(new Ereignis(c.getString(c.getColumnIndex("ereigniszeit")), c.getString(c.getColumnIndex("ereignisname")) ));



            i++;
        }
        if(arr.size() > 0){
            return arr;
        }
        else{
            ArrayList<Ereignis> arrempty = new ArrayList<Ereignis>();
            arrempty.add(new Ereignis("Keine Daten vorhanden", " "));
            return arrempty;
        }
    }

有人可以告诉我我的错误在哪里吗？

修改

这是selectEreignis()

public Cursor selectEreignis(int kindid){
    SQLiteDatabase db = getReadableDatabase();
    Cursor cursor = db.rawQuery("SELECT ereignisname FROM EREIGNIS WHERE KINDID = " + kindid, null);

    System.out.println("HALLLIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII"  + cursor.getCount());
    return cursor;
}

Answer 1

“ereigniszeit”不在架构中作为列名。可能是拼写错误。或者你的selectEreignis函数可能不会要求该列。

Answer 2

Cursor cursor = db.rawQuery("SELECT ereignisname FROM EREIGNIS WHERE KINDID = " + kindid, null);

将其更改为

Cursor cursor = db.rawQuery("SELECT ereignisname, ereigniszeit  FROM EREIGNIS WHERE KINDID = " + kindid, null);

如果您的表格和查询都很好，请执行此类操作。

    if(c.moveToFirst())
    {
    do
    {
    // your array stuff here
    }while(c.moveToNext());
    }

Answer 3

请尝试更改列名ereigniszeit或ereignisname，然后尝试。因为此变量可能已在sqlite数据库架构中声明

Answer 4

好的，我在ereigniszeit函数中添加了selectEreignis()。

无法从CursorWindow读取第1行col -1

4 个答案: