Java 在代码中找不到错误

大家好，我有一个小问题，我更改了sql数据库代码和我的活动代码。。。现在，当我尝试启动活动时，应用程序崩溃（1）。我也给你sql数据库代码（2）。以及logcat（3）中的文本

（1）：

package com.peky.smartornot;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TabHost;
import android.widget.Toast;
import android.widget.TabHost.TabSpec;
import android.widget.TextView;

public class POV1 extends Activity {
    Sql ulaz = new Sql(this);
    TextView joke4text;
    TextView joke3text;
    TextView joke2text;
    TextView joke1text;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_pov1);
        sve();
    }

    public void sve() {
        // TODO Auto-generated method stub
        ulaz.open();
        int joker1 = ulaz.procitaj(), joker2 = ulaz.procitaj2(), joker3 = ulaz
                .procitaj3(), joker4 = ulaz.procitaj4();
        ulaz.close();
        TabHost joker = (TabHost) findViewById(R.id.tabhost);
        joker.setup();
        TabSpec izgled = joker.newTabSpec("tag1");
        izgled.setContent(R.id.tab1);
        izgled.setIndicator("Joker 1");
        joker.addTab(izgled);
        izgled = joker.newTabSpec("tag2");
        izgled.setContent(R.id.tab2);
        izgled.setIndicator("Joker 2");
        joker.addTab(izgled);
        izgled = joker.newTabSpec("tag3");
        izgled.setContent(R.id.tab3);
        izgled.setIndicator("Joker 3");
        joker.addTab(izgled);
        izgled = joker.newTabSpec("tag4");
        izgled.setContent(R.id.tab4);
        izgled.setIndicator("Joker 4");
        joker.addTab(izgled);
        joke1text = (TextView) findViewById(R.id.joker1text);
        joke1text.setText("You have " + joker1 + " jokers !");
        joke2text = (TextView) findViewById(R.id.joker2text);
        joke2text.setText("You have " + joker2 + " jokers !");
        joke3text = (TextView) findViewById(R.id.joker3text);
        joke3text.setText("You have " + joker3 + " jokers !");
        joke4text = (TextView) findViewById(R.id.joker4text);
        joke4text.setText("You have " + joker4 + " jokers !");
    }

    public void joker1(View view) {
        Button netocan = (Button) findViewById(R.id.button5);
        Button netocan2 = (Button) findViewById(R.id.button4);
        Button netocan3 = (Button) findViewById(R.id.button2);
        ulaz.open();
        int joker1=ulaz.procitaj(),joker2,joker3,joker4;
        ulaz.close();
        if (joker1 != 0) {
            if(netocan.getVisibility()==View.VISIBLE){
                netocan.setVisibility(View.INVISIBLE);
                ulaz.open();
                joker1=joker1-1;
                joker2=ulaz.procitaj2();
                joker3=ulaz.procitaj3();
                joker4=ulaz.procitaj4();
                ulaz.spremijoker(joker1, joker2, joker3, joker4);
                ulaz.close();
                joke1text = (TextView) findViewById(R.id.joker1text);
                joke1text.setText("You have " + joker1 + " jokers !");
            }else if(netocan2.getVisibility()==View.VISIBLE){
                netocan2.setVisibility(View.INVISIBLE);
                ulaz.open();
                joker1=joker1-1;
                joker2=ulaz.procitaj2();
                joker3=ulaz.procitaj3();
                joker4=ulaz.procitaj4();
                ulaz.spremijoker(joker1, joker2, joker3, joker4);
                ulaz.close();
                joke1text = (TextView) findViewById(R.id.joker1text);
                joke1text.setText("You have " + joker1 + " jokers !");
            }else if(netocan3.getVisibility()==View.VISIBLE){
                netocan3.setVisibility(View.INVISIBLE);
                ulaz.open();
                joker1=joker1-1;
                joker2=ulaz.procitaj2();
                joker3=ulaz.procitaj3();
                joker4=ulaz.procitaj4();
                ulaz.spremijoker(joker1, joker2, joker3, joker4);
                ulaz.close();
                joke1text = (TextView) findViewById(R.id.joker1text);
                joke1text.setText("You have " + joker1 + " jokers !");
            }else{
                Toast imasodgovor=Toast.makeText(getApplicationContext(), "You can not use more JOKERS1 on this question !", Toast.LENGTH_SHORT);
                imasodgovor.show();
            }

        }else{
            Toast nemasjokera=Toast.makeText(getApplicationContext(), "You dont have enought JOKERS1 !", Toast.LENGTH_SHORT);
            nemasjokera.show();
        }

    }

    public void joker4(View view) {
        ulaz.open();
        int joker1,joker2,joker3,joker4=ulaz.procitaj4();
        ulaz.close();
        Button netocan = (Button) findViewById(R.id.button5);
        Button netocan2 = (Button) findViewById(R.id.button4);
        Button netocan3 = (Button) findViewById(R.id.button2);
        if (joker4 != 0) {
            if(netocan.getVisibility()==View.VISIBLE || netocan2.getVisibility()==View.VISIBLE || netocan3.getVisibility()==View.VISIBLE){
            netocan.setVisibility(View.INVISIBLE);
            netocan2.setVisibility(View.INVISIBLE);
            netocan3.setVisibility(View.INVISIBLE);
            ulaz.open();
            joker1=ulaz.procitaj();
            joker2=ulaz.procitaj2();
            joker3=ulaz.procitaj3();
            joker4=joker4 - 1;;
            ulaz.spremijoker(joker1, joker2, joker3, joker4);
            ulaz.close();
            joke4text = (TextView) findViewById(R.id.joker4text);
            joke4text.setText("You have " + joker4 + " jokers !");}else{
                Toast imasodgovor=Toast.makeText(getApplicationContext(), "You can not use more JOKERS4 on this question !", Toast.LENGTH_SHORT);
                imasodgovor.show();
            }
        } else {
            Toast jokertext = Toast.makeText(getApplicationContext(),
                    "Not enought JOKERS4", Toast.LENGTH_SHORT);
            jokertext.show();

        }
    }

    public void joker2(View view){

    }
    public void tocan(View view){
    }
    public void netocanodgovor(View view) {
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.pov1, menu);
        return false;
    }

}

package com.peky.smartornot;

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

public class Sql {
    public static final String KEY_ROWID = "_id";
    public static final String KEY_JOKER1 = "joker";
    public static final String KEY_JOKER2 = "joker2";
    public static final String KEY_JOKER3 = "joker3";
    public static final String KEY_JOKER4 = "joker4";

    private static final String DATABASE_NAME = "SQL";
    private static final String DATABASE_TABLE = "peoples_table";
    private static final int DATABASE_VERSION = 1;

    private DbHelper ourHelper;
    private final Context ourContext;
    private SQLiteDatabase ourDatabase;

    private static class DbHelper extends SQLiteOpenHelper {

        public DbHelper(Context context) {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);
            // TODO Auto-generated constructor stub
        }

        @Override
        public void onCreate(SQLiteDatabase db) {
            // TODO Auto-generated method stub
            db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" + KEY_ROWID
                    + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_JOKER1
                    + " INTEGER, " + KEY_JOKER2 + " INTEGER, " + KEY_JOKER3
                    + " INTEGER, " + KEY_JOKER4 + " INTEGER);");
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            // TODO Auto-generated method stub
            db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
            onCreate(db);
        }

    }

    public Sql(Context c) {
        ourContext = c;
    }

    public Sql open() {
        ourHelper = new DbHelper(ourContext);
        ourDatabase = ourHelper.getWritableDatabase();
        return this;
    }

    public void close() {
        ourHelper.close();
    }

    public long spremijoker(int joker1, int joker2, int joker3, int joker4) {
        // TODO Auto-generated method stub
        ContentValues cv = new ContentValues();

        cv.put(KEY_JOKER1, joker1);

        cv.put(KEY_JOKER2, joker2);

        cv.put(KEY_JOKER3, joker3);

        cv.put(KEY_JOKER4, joker4);

        return ourDatabase.insert(DATABASE_TABLE, null, cv);

    }

    public int procitaj() {
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER1 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJokerammount = c.getColumnIndex(KEY_JOKER1);
        c.moveToLast();
        citac = c.getInt(iJokerammount);

        return citac;

    }

    public int procitaj2() {
        // TODO Auto-generated method stub
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER2 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJoker2 = c.getColumnIndex(KEY_JOKER2);
        c.moveToLast();
        citac = c.getInt(iJoker2);

        return citac;

    }

    public int procitaj3() {
        // TODO Auto-generated method stub
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER3 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJoker3 = c.getColumnIndex(KEY_JOKER3);
        c.moveToLast();
        citac = c.getInt(iJoker3);

        return citac;

    }

    public int procitaj4() {
        // TODO Auto-generated method stub
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER4 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJoker4 = c.getColumnIndex(KEY_JOKER4);
        c.moveToLast();
        citac = c.getInt(iJoker4);

        return citac;

    }

}

c.moveToLast;

（2）：

package com.peky.smartornot;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TabHost;
import android.widget.Toast;
import android.widget.TabHost.TabSpec;
import android.widget.TextView;

public class POV1 extends Activity {
    Sql ulaz = new Sql(this);
    TextView joke4text;
    TextView joke3text;
    TextView joke2text;
    TextView joke1text;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_pov1);
        sve();
    }

    public void sve() {
        // TODO Auto-generated method stub
        ulaz.open();
        int joker1 = ulaz.procitaj(), joker2 = ulaz.procitaj2(), joker3 = ulaz
                .procitaj3(), joker4 = ulaz.procitaj4();
        ulaz.close();
        TabHost joker = (TabHost) findViewById(R.id.tabhost);
        joker.setup();
        TabSpec izgled = joker.newTabSpec("tag1");
        izgled.setContent(R.id.tab1);
        izgled.setIndicator("Joker 1");
        joker.addTab(izgled);
        izgled = joker.newTabSpec("tag2");
        izgled.setContent(R.id.tab2);
        izgled.setIndicator("Joker 2");
        joker.addTab(izgled);
        izgled = joker.newTabSpec("tag3");
        izgled.setContent(R.id.tab3);
        izgled.setIndicator("Joker 3");
        joker.addTab(izgled);
        izgled = joker.newTabSpec("tag4");
        izgled.setContent(R.id.tab4);
        izgled.setIndicator("Joker 4");
        joker.addTab(izgled);
        joke1text = (TextView) findViewById(R.id.joker1text);
        joke1text.setText("You have " + joker1 + " jokers !");
        joke2text = (TextView) findViewById(R.id.joker2text);
        joke2text.setText("You have " + joker2 + " jokers !");
        joke3text = (TextView) findViewById(R.id.joker3text);
        joke3text.setText("You have " + joker3 + " jokers !");
        joke4text = (TextView) findViewById(R.id.joker4text);
        joke4text.setText("You have " + joker4 + " jokers !");
    }

    public void joker1(View view) {
        Button netocan = (Button) findViewById(R.id.button5);
        Button netocan2 = (Button) findViewById(R.id.button4);
        Button netocan3 = (Button) findViewById(R.id.button2);
        ulaz.open();
        int joker1=ulaz.procitaj(),joker2,joker3,joker4;
        ulaz.close();
        if (joker1 != 0) {
            if(netocan.getVisibility()==View.VISIBLE){
                netocan.setVisibility(View.INVISIBLE);
                ulaz.open();
                joker1=joker1-1;
                joker2=ulaz.procitaj2();
                joker3=ulaz.procitaj3();
                joker4=ulaz.procitaj4();
                ulaz.spremijoker(joker1, joker2, joker3, joker4);
                ulaz.close();
                joke1text = (TextView) findViewById(R.id.joker1text);
                joke1text.setText("You have " + joker1 + " jokers !");
            }else if(netocan2.getVisibility()==View.VISIBLE){
                netocan2.setVisibility(View.INVISIBLE);
                ulaz.open();
                joker1=joker1-1;
                joker2=ulaz.procitaj2();
                joker3=ulaz.procitaj3();
                joker4=ulaz.procitaj4();
                ulaz.spremijoker(joker1, joker2, joker3, joker4);
                ulaz.close();
                joke1text = (TextView) findViewById(R.id.joker1text);
                joke1text.setText("You have " + joker1 + " jokers !");
            }else if(netocan3.getVisibility()==View.VISIBLE){
                netocan3.setVisibility(View.INVISIBLE);
                ulaz.open();
                joker1=joker1-1;
                joker2=ulaz.procitaj2();
                joker3=ulaz.procitaj3();
                joker4=ulaz.procitaj4();
                ulaz.spremijoker(joker1, joker2, joker3, joker4);
                ulaz.close();
                joke1text = (TextView) findViewById(R.id.joker1text);
                joke1text.setText("You have " + joker1 + " jokers !");
            }else{
                Toast imasodgovor=Toast.makeText(getApplicationContext(), "You can not use more JOKERS1 on this question !", Toast.LENGTH_SHORT);
                imasodgovor.show();
            }

        }else{
            Toast nemasjokera=Toast.makeText(getApplicationContext(), "You dont have enought JOKERS1 !", Toast.LENGTH_SHORT);
            nemasjokera.show();
        }

    }

    public void joker4(View view) {
        ulaz.open();
        int joker1,joker2,joker3,joker4=ulaz.procitaj4();
        ulaz.close();
        Button netocan = (Button) findViewById(R.id.button5);
        Button netocan2 = (Button) findViewById(R.id.button4);
        Button netocan3 = (Button) findViewById(R.id.button2);
        if (joker4 != 0) {
            if(netocan.getVisibility()==View.VISIBLE || netocan2.getVisibility()==View.VISIBLE || netocan3.getVisibility()==View.VISIBLE){
            netocan.setVisibility(View.INVISIBLE);
            netocan2.setVisibility(View.INVISIBLE);
            netocan3.setVisibility(View.INVISIBLE);
            ulaz.open();
            joker1=ulaz.procitaj();
            joker2=ulaz.procitaj2();
            joker3=ulaz.procitaj3();
            joker4=joker4 - 1;;
            ulaz.spremijoker(joker1, joker2, joker3, joker4);
            ulaz.close();
            joke4text = (TextView) findViewById(R.id.joker4text);
            joke4text.setText("You have " + joker4 + " jokers !");}else{
                Toast imasodgovor=Toast.makeText(getApplicationContext(), "You can not use more JOKERS4 on this question !", Toast.LENGTH_SHORT);
                imasodgovor.show();
            }
        } else {
            Toast jokertext = Toast.makeText(getApplicationContext(),
                    "Not enought JOKERS4", Toast.LENGTH_SHORT);
            jokertext.show();

        }
    }

    public void joker2(View view){

    }
    public void tocan(View view){
    }
    public void netocanodgovor(View view) {
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.pov1, menu);
        return false;
    }

}

package com.peky.smartornot;

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

public class Sql {
    public static final String KEY_ROWID = "_id";
    public static final String KEY_JOKER1 = "joker";
    public static final String KEY_JOKER2 = "joker2";
    public static final String KEY_JOKER3 = "joker3";
    public static final String KEY_JOKER4 = "joker4";

    private static final String DATABASE_NAME = "SQL";
    private static final String DATABASE_TABLE = "peoples_table";
    private static final int DATABASE_VERSION = 1;

    private DbHelper ourHelper;
    private final Context ourContext;
    private SQLiteDatabase ourDatabase;

    private static class DbHelper extends SQLiteOpenHelper {

        public DbHelper(Context context) {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);
            // TODO Auto-generated constructor stub
        }

        @Override
        public void onCreate(SQLiteDatabase db) {
            // TODO Auto-generated method stub
            db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" + KEY_ROWID
                    + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_JOKER1
                    + " INTEGER, " + KEY_JOKER2 + " INTEGER, " + KEY_JOKER3
                    + " INTEGER, " + KEY_JOKER4 + " INTEGER);");
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            // TODO Auto-generated method stub
            db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
            onCreate(db);
        }

    }

    public Sql(Context c) {
        ourContext = c;
    }

    public Sql open() {
        ourHelper = new DbHelper(ourContext);
        ourDatabase = ourHelper.getWritableDatabase();
        return this;
    }

    public void close() {
        ourHelper.close();
    }

    public long spremijoker(int joker1, int joker2, int joker3, int joker4) {
        // TODO Auto-generated method stub
        ContentValues cv = new ContentValues();

        cv.put(KEY_JOKER1, joker1);

        cv.put(KEY_JOKER2, joker2);

        cv.put(KEY_JOKER3, joker3);

        cv.put(KEY_JOKER4, joker4);

        return ourDatabase.insert(DATABASE_TABLE, null, cv);

    }

    public int procitaj() {
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER1 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJokerammount = c.getColumnIndex(KEY_JOKER1);
        c.moveToLast();
        citac = c.getInt(iJokerammount);

        return citac;

    }

    public int procitaj2() {
        // TODO Auto-generated method stub
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER2 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJoker2 = c.getColumnIndex(KEY_JOKER2);
        c.moveToLast();
        citac = c.getInt(iJoker2);

        return citac;

    }

    public int procitaj3() {
        // TODO Auto-generated method stub
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER3 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJoker3 = c.getColumnIndex(KEY_JOKER3);
        c.moveToLast();
        citac = c.getInt(iJoker3);

        return citac;

    }

    public int procitaj4() {
        // TODO Auto-generated method stub
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER4 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJoker4 = c.getColumnIndex(KEY_JOKER4);
        c.moveToLast();
        citac = c.getInt(iJoker4);

        return citac;

    }

}

c.moveToLast;

（3） :

---

你的错误说明了一切：

CursorIndexOutOfBoundsException:请求索引-1，大小为0

您正试图访问元素索引为

-1

的内容的空列表<代码>-1在Java中从来都不是有效的数组索引，因此存在两个问题：

如果确实不需要，为什么列表是空的

是什么导致

-1

的索引值不正确

---

因为

android.app.ActivityThread.performLaunchActivity（ActivityThread.java:1970）

是问题产生的地方，这就是你需要寻找的地方。您的代码中有什么东西在调用它？由于

performLaunchActivity

不在您发布的代码中（您的

main

函数也不在其中），而且您的堆栈跟踪也不太彻底，我们需要更多信息才能进一步帮助您。

我找到了一个解决我在procitaj方法中设置的问题的方法：

for(c.moveToFirst;!c.isAfterLast;c.moveToNext){
 citac = c.getInt(iJoker4);
}

而不是：

package com.peky.smartornot;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TabHost;
import android.widget.Toast;
import android.widget.TabHost.TabSpec;
import android.widget.TextView;

public class POV1 extends Activity {
    Sql ulaz = new Sql(this);
    TextView joke4text;
    TextView joke3text;
    TextView joke2text;
    TextView joke1text;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_pov1);
        sve();
    }

    public void sve() {
        // TODO Auto-generated method stub
        ulaz.open();
        int joker1 = ulaz.procitaj(), joker2 = ulaz.procitaj2(), joker3 = ulaz
                .procitaj3(), joker4 = ulaz.procitaj4();
        ulaz.close();
        TabHost joker = (TabHost) findViewById(R.id.tabhost);
        joker.setup();
        TabSpec izgled = joker.newTabSpec("tag1");
        izgled.setContent(R.id.tab1);
        izgled.setIndicator("Joker 1");
        joker.addTab(izgled);
        izgled = joker.newTabSpec("tag2");
        izgled.setContent(R.id.tab2);
        izgled.setIndicator("Joker 2");
        joker.addTab(izgled);
        izgled = joker.newTabSpec("tag3");
        izgled.setContent(R.id.tab3);
        izgled.setIndicator("Joker 3");
        joker.addTab(izgled);
        izgled = joker.newTabSpec("tag4");
        izgled.setContent(R.id.tab4);
        izgled.setIndicator("Joker 4");
        joker.addTab(izgled);
        joke1text = (TextView) findViewById(R.id.joker1text);
        joke1text.setText("You have " + joker1 + " jokers !");
        joke2text = (TextView) findViewById(R.id.joker2text);
        joke2text.setText("You have " + joker2 + " jokers !");
        joke3text = (TextView) findViewById(R.id.joker3text);
        joke3text.setText("You have " + joker3 + " jokers !");
        joke4text = (TextView) findViewById(R.id.joker4text);
        joke4text.setText("You have " + joker4 + " jokers !");
    }

    public void joker1(View view) {
        Button netocan = (Button) findViewById(R.id.button5);
        Button netocan2 = (Button) findViewById(R.id.button4);
        Button netocan3 = (Button) findViewById(R.id.button2);
        ulaz.open();
        int joker1=ulaz.procitaj(),joker2,joker3,joker4;
        ulaz.close();
        if (joker1 != 0) {
            if(netocan.getVisibility()==View.VISIBLE){
                netocan.setVisibility(View.INVISIBLE);
                ulaz.open();
                joker1=joker1-1;
                joker2=ulaz.procitaj2();
                joker3=ulaz.procitaj3();
                joker4=ulaz.procitaj4();
                ulaz.spremijoker(joker1, joker2, joker3, joker4);
                ulaz.close();
                joke1text = (TextView) findViewById(R.id.joker1text);
                joke1text.setText("You have " + joker1 + " jokers !");
            }else if(netocan2.getVisibility()==View.VISIBLE){
                netocan2.setVisibility(View.INVISIBLE);
                ulaz.open();
                joker1=joker1-1;
                joker2=ulaz.procitaj2();
                joker3=ulaz.procitaj3();
                joker4=ulaz.procitaj4();
                ulaz.spremijoker(joker1, joker2, joker3, joker4);
                ulaz.close();
                joke1text = (TextView) findViewById(R.id.joker1text);
                joke1text.setText("You have " + joker1 + " jokers !");
            }else if(netocan3.getVisibility()==View.VISIBLE){
                netocan3.setVisibility(View.INVISIBLE);
                ulaz.open();
                joker1=joker1-1;
                joker2=ulaz.procitaj2();
                joker3=ulaz.procitaj3();
                joker4=ulaz.procitaj4();
                ulaz.spremijoker(joker1, joker2, joker3, joker4);
                ulaz.close();
                joke1text = (TextView) findViewById(R.id.joker1text);
                joke1text.setText("You have " + joker1 + " jokers !");
            }else{
                Toast imasodgovor=Toast.makeText(getApplicationContext(), "You can not use more JOKERS1 on this question !", Toast.LENGTH_SHORT);
                imasodgovor.show();
            }

        }else{
            Toast nemasjokera=Toast.makeText(getApplicationContext(), "You dont have enought JOKERS1 !", Toast.LENGTH_SHORT);
            nemasjokera.show();
        }

    }

    public void joker4(View view) {
        ulaz.open();
        int joker1,joker2,joker3,joker4=ulaz.procitaj4();
        ulaz.close();
        Button netocan = (Button) findViewById(R.id.button5);
        Button netocan2 = (Button) findViewById(R.id.button4);
        Button netocan3 = (Button) findViewById(R.id.button2);
        if (joker4 != 0) {
            if(netocan.getVisibility()==View.VISIBLE || netocan2.getVisibility()==View.VISIBLE || netocan3.getVisibility()==View.VISIBLE){
            netocan.setVisibility(View.INVISIBLE);
            netocan2.setVisibility(View.INVISIBLE);
            netocan3.setVisibility(View.INVISIBLE);
            ulaz.open();
            joker1=ulaz.procitaj();
            joker2=ulaz.procitaj2();
            joker3=ulaz.procitaj3();
            joker4=joker4 - 1;;
            ulaz.spremijoker(joker1, joker2, joker3, joker4);
            ulaz.close();
            joke4text = (TextView) findViewById(R.id.joker4text);
            joke4text.setText("You have " + joker4 + " jokers !");}else{
                Toast imasodgovor=Toast.makeText(getApplicationContext(), "You can not use more JOKERS4 on this question !", Toast.LENGTH_SHORT);
                imasodgovor.show();
            }
        } else {
            Toast jokertext = Toast.makeText(getApplicationContext(),
                    "Not enought JOKERS4", Toast.LENGTH_SHORT);
            jokertext.show();

        }
    }

    public void joker2(View view){

    }
    public void tocan(View view){
    }
    public void netocanodgovor(View view) {
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.pov1, menu);
        return false;
    }

}

package com.peky.smartornot;

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

public class Sql {
    public static final String KEY_ROWID = "_id";
    public static final String KEY_JOKER1 = "joker";
    public static final String KEY_JOKER2 = "joker2";
    public static final String KEY_JOKER3 = "joker3";
    public static final String KEY_JOKER4 = "joker4";

    private static final String DATABASE_NAME = "SQL";
    private static final String DATABASE_TABLE = "peoples_table";
    private static final int DATABASE_VERSION = 1;

    private DbHelper ourHelper;
    private final Context ourContext;
    private SQLiteDatabase ourDatabase;

    private static class DbHelper extends SQLiteOpenHelper {

        public DbHelper(Context context) {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);
            // TODO Auto-generated constructor stub
        }

        @Override
        public void onCreate(SQLiteDatabase db) {
            // TODO Auto-generated method stub
            db.execSQL("CREATE TABLE " + DATABASE_TABLE + " (" + KEY_ROWID
                    + " INTEGER PRIMARY KEY AUTOINCREMENT, " + KEY_JOKER1
                    + " INTEGER, " + KEY_JOKER2 + " INTEGER, " + KEY_JOKER3
                    + " INTEGER, " + KEY_JOKER4 + " INTEGER);");
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            // TODO Auto-generated method stub
            db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE);
            onCreate(db);
        }

    }

    public Sql(Context c) {
        ourContext = c;
    }

    public Sql open() {
        ourHelper = new DbHelper(ourContext);
        ourDatabase = ourHelper.getWritableDatabase();
        return this;
    }

    public void close() {
        ourHelper.close();
    }

    public long spremijoker(int joker1, int joker2, int joker3, int joker4) {
        // TODO Auto-generated method stub
        ContentValues cv = new ContentValues();

        cv.put(KEY_JOKER1, joker1);

        cv.put(KEY_JOKER2, joker2);

        cv.put(KEY_JOKER3, joker3);

        cv.put(KEY_JOKER4, joker4);

        return ourDatabase.insert(DATABASE_TABLE, null, cv);

    }

    public int procitaj() {
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER1 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJokerammount = c.getColumnIndex(KEY_JOKER1);
        c.moveToLast();
        citac = c.getInt(iJokerammount);

        return citac;

    }

    public int procitaj2() {
        // TODO Auto-generated method stub
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER2 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJoker2 = c.getColumnIndex(KEY_JOKER2);
        c.moveToLast();
        citac = c.getInt(iJoker2);

        return citac;

    }

    public int procitaj3() {
        // TODO Auto-generated method stub
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER3 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJoker3 = c.getColumnIndex(KEY_JOKER3);
        c.moveToLast();
        citac = c.getInt(iJoker3);

        return citac;

    }

    public int procitaj4() {
        // TODO Auto-generated method stub
        // TODO Auto-generated method stub
        String[] columns = new String[] { KEY_ROWID, KEY_JOKER4 };
        Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null,
                null, null);
        int citac = 0;
        int iJoker4 = c.getColumnIndex(KEY_JOKER4);
        c.moveToLast();
        citac = c.getInt(iJoker4);

        return citac;

    }

}

c.moveToLast;

---

无论如何谢谢你

你确定这是完整的日志吗？另外，到目前为止，您在追踪问题方面做了哪些尝试？还要检查一下我还没有看过你的代码，但是如果你从-1是有效索引的其他语言迁移，你必须将它更改为

List.getLength（）-1

或类似的语言。在Java中将“从不”更改为“从不”。因此，如果我在创建代码时添加一个内容值以将0放入其中，它可以解决我的问题吗？不，最小值应该是0，我猜列表是空的。我会尝试一下。如果没有看到更多相关的代码，我不能肯定，但肯定值得一试。