Android 不能'；t从游标窗口读取第0行第1列，游标初始化错误

我在执行代码时遇到此错误

无法从游标窗口读取第0行第1列。在从光标访问数据之前，请确保光标已正确初始化

我的数据库代码如下

package com.routecounselor;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class Project_DB extends SQLiteOpenHelper {

    public Project_DB(Context context) {
        super(context, "mydb.db", null, 1);

        // TODO Auto-generated constructor stub
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        // TODO Auto-generated method stub
        db.execSQL("CREATE TABLE route(routeId INTEGER PRIMARY KEY AUTOINCREMENT,routeNumber VARCHAR(5))");
        db.execSQL("CREATE TABLE stop(stopId INTEGER PRIMARY KEY AUTOINCREMENT,stopName VARCHAR(40),lat double,lon double)");
        db.execSQL("CREATE TABLE relation(relationId INTEGER PRIMARY KEY AUTOINCREMENT,routeId INTEGER, stopId INTEGER,"
                + "FOREIGN KEY(routeId) REFERENCES route(routeId),  FOREIGN KEY(stopId) REFERENCES stop(stopId))");

        Log.d("LOGCAT", "Route Table Created");
        Log.d("LOGCAT", "Stop Table Created");
        Log.d("LOGCAT", "Relation Table Created");

    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // TODO Auto-generated method stub

    }

    public void insertroute() {
        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put("routeNumber", "101");
        db.insert("route", null, values);
        values.put("routeNumber", "104");
        db.insert("route", null, values);
        values.put("routeNumber", "104-A");
        db.insert("route", null, values);
        values.put("routeNumber", "105");
        db.insert("route", null, values);
        values.put("routeNumber", "105-A");
        db.insert("route", null, values);
        values.put("routeNumber", "110");
        db.insert("route", null, values);
        values.put("routeNumber", "111");
        db.insert("route", null, values);
        values.put("routeNumber", "113-A");
        db.insert("route", null, values);
        values.put("routeNumber", "115");
        db.insert("route", null, values);
        values.put("routeNumber", "120");
        db.insert("route", null, values);
        values.put("routeNumber", "121");
        db.insert("route", null, values);
        values.put("routeNumber", "122");
        db.insert("route", null, values);
        values.put("routeNumber", "122-A");
        db.insert("route", null, values);
        values.put("routeNumber", "124");
        db.insert("route", null, values);
        values.put("routeNumber", "124-A");
        db.insert("route", null, values);
        values.put("routeNumber", "127");
        db.insert("route", null, values);
        values.put("routeNumber", "127-A");
        db.insert("route", null, values);
        values.put("routeNumber", "128");
        db.insert("route", null, values);
        values.put("routeNumber", "131");
        db.insert("route", null, values);
        values.put("routeNumber", "133");
        db.insert("route", null, values);
        values.put("routeNumber", "136");
        db.insert("route", null, values);
        values.put("routeNumber", "138");
        db.insert("route", null, values);
        values.put("routeNumber", "1");
        db.insert("route", null, values);
        values.put("routeNumber", "1-C");
        db.insert("route", null, values);
        values.put("routeNumber", "3");
        db.insert("route", null, values);
        values.put("routeNumber", "6");
        db.insert("route", null, values);
        values.put("routeNumber", "7");
        db.insert("route", null, values);
        values.put("routeNumber", "21");
        db.insert("route", null, values);
        values.put("routeNumber", "24");
        db.insert("route", null, values);
        db.close();

    }

    public void insertstopName() {

        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues values1 = new ContentValues();
        values1.put("stopName", "Mandimor");
        values1.put("lat", "33.637358");
        values1.put("lon", "73.035063");
        db.insert("stop", null, values1);

        values1.put("stopName", "Pindora");
        values1.put("lat", "33.652172");
        values1.put("lon", "73.064414");
        db.insert("stop", null, values1);

        values1.put("stopName", "Faizabad");
        values1.put("lat", "33.663157");
        values1.put("lon", " 73.085276");
        db.insert("stop", null, values1);

        values1.put("stopName", "Zeropoint");
        values1.put("lat", "33.678763");
        values1.put("lon", "73.076445");
        db.insert("stop", null, values1);

        values1.put("stopName", "Aabpara");
        values1.put("lat", " 33.707109");
        values1.put("lon", " 73.089308");
        db.insert("stop", null, values1);

        values1.put("stopName", "Super Market");
        values1.put("lat", "33.729444");
        values1.put("lon", "73.077584");
        db.insert("stop", null, values1);

        values1.put("stopName", "Tarnol");
        values1.put("lat", " 33.649919");
        values1.put("lon", "  72.910876");
        db.insert("stop", null, values1);

        values1.put("stopName", "G-10/1");
        values1.put("lat", " 33.670376");
        values1.put("lon", "  73.010287");
        db.insert("stop", null, values1);

        values1.put("stopName", "G-10/2");
        values1.put("lat", " 33.677019");
        values1.put("lon", " 73.005395");
        db.insert("stop", null, values1);

        values1.put("stopName", "G-10/3");
        values1.put("lat", " 33.686465");
        values1.put("lon", "73.020801");
        db.insert("stop", null, values1);

        values1.put("stopName", "G-9/3");
        values1.put("lat", " 33.696266");
        values1.put("lon", " 73.033483");
        db.insert("stop", null, values1);

        values1.put("stopName", "Pims");
        values1.put("lat", " 33.707050");
        values1.put("lon", "  73.054187");
        db.insert("stop", null, values1);

        values1.put("stopName", "G-7 Markaz");
        values1.put("lat", " 33.720329");
        values1.put("lon", "  73.058162");
        db.insert("stop", null, values1);

        values1.put("stopName", "Lal Quarter");
        values1.put("lat", " 33.717243");
        values1.put("lon", "  73.073263");
        db.insert("stop", null, values1);

        values1.put("stopName", "Polyclinic");
        values1.put("lat", " 33.720902");
        values1.put("lon", " 73.080108");
        db.insert("stop", null, values1);

        values1.put("stopName", "Pak Secretariat");
        values1.put("lat", " 33.737451");
        values1.put("lon", "  73.091737");
        db.insert("stop", null, values1);

        values1.put("stopName", "Islamabad Chok");
        values1.put("lat", " 33.632182");
        values1.put("lon", "  72.938578");
        db.insert("stop", null, values1);

        values1.put("stopName", "G-11/1");
        values1.put("lat", " 33.658188");
        values1.put("lon", "  72.995135");
        db.insert("stop", null, values1);

        values1.put("stopName", "G-11/4");
        values1.put("lat", " 33.664504");
        values1.put("lon", "  73.000978");
        db.insert("stop", null, values1);

        values1.put("stopName", "G-10 Markaz");
        values1.put("lat", " 33.676794");
        values1.put("lon", "  73.014791");
        db.insert("stop", null, values1);

        values1.put("stopName", "G-9 Markaz");
        values1.put("lat", "33.689885");
        values1.put("lon", "73.030500");
        db.insert("stop", null, values1);

        values1.put("stopName", "Blue Area");
        values1.put("lat", " 33.710953");
        values1.put("lon", "  73.060684");
        db.insert("stop", null, values1);

        values1.put("stopName", "Parliament Chok ");
        values1.put("lat", "33.729316 ");
        values1.put("lon", "73.093008");
        db.insert("stop", null, values1);

        values1.put("stopName", "G-15");
        values1.put("lat", "33.633175");
        values1.put("lon", "72.922142");
        db.insert("stop", null, values1);

        values1.put("stopName", "T and T Chok");
        values1.put("lat", "33.694879");
        values1.put("lon", "73.064160");
        db.insert("stop", null, values1);

        values1.put("stopName", "G-7/2");
        values1.put("lat", "33.702493");
        values1.put("lon", "73.066129");
        db.insert("stop", null, values1);

        values1.put("stopName", "Meloody");
        values1.put("lat", "33.716464");
        values1.put("lon", "73.083493");
        db.insert("stop", null, values1);

        values1.put("stopName", "Foreign Office");
        values1.put("lat", "33.718699");
        values1.put("lon", "73.103647");
        db.insert("stop", null, values1);

        values1.put("stopName", "Chattar");
        values1.put("lat", "33.779976");
        values1.put("lon", "73.240520");
        db.insert("stop", null, values1);

        values1.put("stopName", "Bara Kau");
        values1.put("lat", "33.739015");
        values1.put("lon", "73.178387");
        db.insert("stop", null, values1);

        values1.put("stopName", "Malpur");
        values1.put("lat", "33.730146");
        values1.put("lon", "73.145852");
        db.insert("stop", null, values1);

        values1.put("stopName", "RawalDam Chok");
        values1.put("lat", "33.708651");
        values1.put("lon", "73.106199");
        db.insert("stop", null, values1);
        db.close();
    }

    public void insertrelation() {
        SQLiteDatabase db = this.getWritableDatabase();
        ContentValues values3 = new ContentValues();
        values3.put("routeId", "1");
        values3.put("stopId", "1");
        db.insert("relation", null, values3);

        values3.put("routeId", "1");
        values3.put("stopId", "2");
        db.insert("relation", null, values3);

        values3.put("routeId", "1");
        values3.put("stopId", "3");
        db.insert("relation", null, values3);

        values3.put("routeId", "1");
        values3.put("stopId", "4");
        db.insert("relation", null, values3);

        values3.put("routeId", "1");
        values3.put("stopId", "5");
        db.insert("relation", null, values3);

        values3.put("routeId", "1");
        values3.put("stopId", "6");
        db.insert("relation", null, values3);

        values3.put("routeId", "1");
        values3.put("stopId", "49");
        db.insert("relation", null, values3);

        values3.put("routeId", "2");
        values3.put("stopId", "7");
        db.insert("relation", null, values3);

        values3.put("routeId", "2");
        values3.put("stopId", "8");
        db.insert("relation", null, values3);

        values3.put("routeId", "2");
        values3.put("stopId", "9");
        db.insert("relation", null, values3);

        values3.put("routeId", "2");
        values3.put("stopId", "10");
        db.insert("relation", null, values3);

        values3.put("routeId", "2");
        values3.put("stopId", "11");
        db.insert("relation", null, values3);

        values3.put("routeId", "2");
        values3.put("stopId", "12");
        db.insert("relation", null, values3);

        values3.put("routeId", "2");
        values3.put("stopId", "13");
        db.insert("relation", null, values3);

        values3.put("routeId", "2");
        values3.put("stopId", "14");
        db.insert("relation", null, values3);

        values3.put("routeId", "2");
        values3.put("stopId", "15");
        db.insert("relation", null, values3);

        values3.put("routeId", "2");
        values3.put("stopId", "6");
        db.insert("relation", null, values3);

        values3.put("routeId", "2");
        values3.put("stopId", "16");
        db.insert("relation", null, values3);

        values3.put("routeId", "3");
        values3.put("stopId", "7");
        db.insert("relation", null, values3);

        values3.put("routeId", "3");
        values3.put("stopId", "17");
        db.insert("relation", null, values3);

        values3.put("routeId", "3");
        values3.put("stopId", "18");
        db.insert("relation", null, values3);

        values3.put("routeId", "3");
        values3.put("stopId", "19");
        db.insert("relation", null, values3);

        values3.put("routeId", "3");
        values3.put("stopId", "20");
        db.insert("relation", null, values3);

        values3.put("routeId", "3");
        values3.put("stopId", "21");
        db.insert("relation", null, values3);

        values3.put("routeId", "3");
        values3.put("stopId", "12");
        db.insert("relation", null, values3);

        values3.put("routeId", "3");
        values3.put("stopId", "22");
        db.insert("relation", null, values3);

        values3.put("routeId", "3");
        values3.put("stopId", "15");
        db.insert("relation", null, values3);

        values3.put("routeId", "3");
        values3.put("stopId", "23");
        db.insert("relation", null, values3);

        values3.put("routeId", "3");
        values3.put("stopId", "16");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "24");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "19");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "20");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "9");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "10");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "21");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "25");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "26");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "13");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "14");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "15");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "27");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "5");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "28");
        db.insert("relation", null, values3);

        values3.put("routeId", "4");
        values3.put("stopId", "16");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "24");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "20");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "21");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "25");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "26");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "13");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "14");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "15");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "27");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "5");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "28");
        db.insert("relation", null, values3);

        values3.put("routeId", "5");
        values3.put("stopId", "16");
        db.insert("relation", null, values3);

        values3.put("routeId", "6");
        values3.put("stopId", "29");
        db.insert("relation", null, values3);

        values3.put("routeId", "6");
        values3.put("stopId", "30");
        db.insert("relation", null, values3);

        values3.put("routeId", "6");
        values3.put("stopId", "31");
        db.insert("relation", null, values3);

        values3.put("routeId", "6");
        values3.put("stopId", "32");
        db.insert("relation", null, values3);

        values3.put("routeId", "6");
        values3.put("stopId", "3");
        db.insert("relation", null, values3);

        values3.put("routeId", "6");
        values3.put("stopId", "2");
        db.insert("relation", null, values3);

        values3.put("routeId", "6");
        values3.put("stopId", "33");
        db.insert("relation", null, values3);

        values3.put("routeId", "6");
        values3.put("stopId", "1");
        db.insert("relation", null, values3);

        values3.put("routeId", "7");
        values3.put("stopId", "34");
        db.insert("relation", null, values3);

        values3.put("routeId", "7");
        values3.put("stopId", "35");
        db.insert("relation", null, values3);

        values3.put("routeId", "7");
        values3.put("stopId", "36");
        db.insert("relation", null, values3);

        values3.put("routeId", "7");
        values3.put("stopId", "3");
        db.insert("relation", null, values3);

        values3.put("routeId", "7");
        values3.put("stopId", "37");
        db.insert("relation", null, values3);

        values3.put("routeId", "7");
        values3.put("stopId", "38");
        db.insert("relation", null, values3);

        values3.put("routeId", "7");
        values3.put("stopId", "12");
        db.insert("relation", null, values3);

        values3.put("routeId", "7");
        values3.put("stopId", "39");
        db.insert("relation", null, values3);

        values3.put("routeId", "8");
        values3.put("stopId", "1");
        db.insert("relation", null, values3);

        values3.put("routeId", "8");
        values3.put("stopId", "40");
        db.insert("relation", null, values3);

        values3.put("routeId", "8");
        values3.put("stopId", "41");
        db.insert("relation", null, values3);

        values3.put("routeId", "8");
        values3.put("stopId", "21");
        db.insert("relation", null, values3);

        values3.put("routeId", "8");
        values3.put("stopId", "42");
        db.insert("relation", null, values3);

        values3.put("routeId", "8");
        values3.put("stopId", "12");
        db.insert("relation", null, values3);

        values3.put("routeId", "8");
        values3.put("stopId", "22");
        db.insert("relation", null, values3);

        values3.put("routeId", "8");
        values3.put("stopId", "6");
        db.insert("relation", null, values3);

        values3.put("routeId", "8");
        values3.put("stopId", "16");
        db.insert("relation", null, values3);

        values3.put("routeId", "9");
        values3.put("stopId", "1");
        db.insert("relation", null, values3);

        values3.put("routeId", "9");
        values3.put("stopId", "48");
        db.insert("relation", null, values3);

        values3.put("routeId", "9");
        values3.put("stopId", "40");
        db.insert("relation", null, values3);

        values3.put("routeId", "9");
        values3.put("stopId", "41");
        db.insert("relation", null, values3);

        values3.put("routeId", "9");
        values3.put("stopId", "21");
        db.insert("relation", null, values3);

        values3.put("routeId", "9");
        values3.put("stopId", "20");
        db.insert("relation", null, values3);

        values3.put("routeId", "9");
        values3.put("stopId", "43");
        db.insert("relation", null, values3);

        values3.put("routeId", "9");
        values3.put("stopId", "44");
        db.insert("relation", null, values3);

        values3.put("routeId", "9");
        values3.put("stopId", "18");
        db.insert("relation", null, values3);
        db.close();
    }

    public String matchStop(String data1,String data2)
    {
        String ab=null;
        String Source=null;
        String Destination=null;
        String latitude1=null;
        String longitude1=null;
        String latitude2=null;
        String longitude2=null;
        SQLiteDatabase db=this.getReadableDatabase();
        String select1Query = "SELECT * FROM stop WHERE stopName='"+data1+"'";
        Cursor cursor=db.rawQuery(select1Query,null);
        if(cursor.moveToFirst()){
            do{
                Source=cursor.getString(cursor.getColumnIndex("stopName"));
                latitude1=cursor.getString(cursor.getColumnIndex("lat"));
                longitude1=cursor.getString(cursor.getColumnIndex("lon"));
                /*Log.e("LAt Lan",latitude+longitude+"");
                Log.e("N",Source+"");*/
            }
            while(cursor.moveToNext());
        }
        String select2Query = "SELECT * FROM stop WHERE stopName='"+data2+"'";

        Cursor cursor1=db.rawQuery(select2Query,null);
        if(cursor1.moveToFirst()){
            do{
                Destination=cursor1.getString(cursor1.getColumnIndex("stopName"));
                latitude2=cursor1.getString(cursor1.getColumnIndex("lat"));
                longitude2=cursor1.getString(cursor1.getColumnIndex("lon"));
            }
            while(cursor.moveToNext());

        if(Source!=null && Destination!=null)
        {

            ab= (Source+",,"+Destination+",,"+latitude1+",,"+longitude1+",,"+latitude2+",,"+longitude2);
        }
        else
        {

            }
        if(latitude1!=null && longitude1!=null){

        }
        }

        return ab;
    }

    public String getroutenumber(String Source,String Destination) {
        System.out.println("Inside GetRouteNumber");
        String number=null;
        String number1 = null;
        String number2 = null;
        SQLiteDatabase db = this.getReadableDatabase();
        String selectQuery1="SELECT * FROM stop WHERE stopName='"+Source+"'";
        Cursor cursor1 = db.rawQuery(selectQuery1, null);
        if (cursor1.moveToFirst()) {
            do {


                number1 = cursor1.getString(cursor1.getColumnIndex("stopId"));
                Log.e("Source id", number1 );
            }

            while (cursor1.moveToNext());

        }
        String selectQuery2="SELECT * FROM stop WHERE stopName='"+Destination+"'";
        Cursor cursor2 = db.rawQuery(selectQuery2, null);
        if (cursor2.moveToFirst()) {
            do {


                number2 = cursor2.getString(cursor2.getColumnIndex("stopId"));
                Log.e("Destination Id", number2);
            }

            while (cursor1.moveToNext());

        }
        String selectQuery = "SELECT stopId FROM relation WHERE routeId in(SELECT routeId FROM relation WHERE stopId='"+number1+"')and stopId in(SELECT  stopId FROM relation WHERE routeId in(SELECT routeId FROM relation WHERE stopId='"+number2+"'))";

        Cursor cursor = db.rawQuery(selectQuery, null);
        System.out.println(cursor);
        if (cursor.moveToFirst()) {
            do {

                Log.e("inside", "of do");
                number = cursor.getString(cursor.getColumnIndex("routeNumber"));
                Log.e("Route Number", number );
            }

            while (cursor.moveToNext());

        }
        return number;

    }

}

我的猫日志

08-18 00:06:31.957: E/AndroidRuntime(22127): FATAL EXCEPTION: main
08-18 00:06:31.957: E/AndroidRuntime(22127): java.lang.IllegalStateException: Couldn't read row 0, col -1 from CursorWindow.  Make sure the Cursor is initialized correctly before accessing data from it.
08-18 00:06:31.957: E/AndroidRuntime(22127):    at android.database.CursorWindow.nativeGetString(Native Method)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at android.database.CursorWindow.getString(CursorWindow.java:434)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:51)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at com.routecounselor.Project_DB.getroutenumber(Project_DB.java:2141)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at com.routecounselor.Map$1.onClick(Map.java:136)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at  android.view.View.performClick(View.java:4421)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at android.view.View$PerformClick.run(View.java:17903)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at android.os.Handler.handleCallback(Handler.java:730)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at android.os.Handler.dispatchMessage(Handler.java:92)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at android.os.Looper.loop(Looper.java:213)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at android.app.ActivityThread.main(ActivityThread.java:5225)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at java.lang.reflect.Method.invokeNative(Native Method)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at java.lang.reflect.Method.invoke(Method.java:525)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:741)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
08-18 00:06:31.957: E/AndroidRuntime(22127):    at dalvik.system.NativeStart.main(Native Method)

---

有人能检测出错误在哪里吗？

日志中显示的错误表示，当您从

getroutenumber（）

中调用

getColumnIndex（）

时，它返回了-1，表明检索到的数据集中不存在列名。确保SQL查询正确，并且列名与表中的列完全匹配。如果您无法找出问题所在，请尝试用显式列索引增量替换getColumnIndex（）方法（只是为了调试），然后查看出现错误的位置。

好，让我检查一下。Thnkyou