SQLite сбой при вставке

Question

Метод, вызывающий исключение, - insertdetails().

Мой код:

import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.database.sqlite.SQLiteDatabase; 
import android.media.MediaPlayer; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.ImageView; 
import android.widget.TextView; 
import android.widget.Toast; 

public class AllLevels extends Activity implements OnClickListener { 

    ImageView iv1, iv2, iv3, iv4, iv5, iv6, iv7, iv8, iv9, iv10, iv11, iv12; 
    TextView tv; 
    MediaPlayer mp; 
    DBAdapter dbAdapter; 
    DBHelper dbHelper; 
    SQLiteDatabase db; 
    long a; 

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

     mp = MediaPlayer.create(this, R.raw.main); 
     mp.start(); 
     mp.setLooping(true); 
     Context context = this; 

     final SharedPrefsHandler spf = new SharedPrefsHandler(context); 
     int i = spf.loadPrefs(); 

     Toast.makeText(this, "Value from sharedpref"+i, Toast.LENGTH_SHORT).show(); 

     //creating database and entering default values 

     dbHelper = new DBHelper(this); 

     dbHelper.getWritableDatabase(); //Works fine till here, even database is generated. 

// Это где я подозреваю, что проблема в том, код работает, когда я удалить эти строки, даже не генерировать базу данных, когда эти линии включены.

 dbAdapter.insertDetails(1, 1, 0, 0); 
     dbAdapter.insertDetails(2, 2, 0, 0); 
     dbAdapter.insertDetails(3, 3, 0, 0); 
     dbAdapter.insertDetails(4, 4, 0, 0); 
     dbAdapter.insertDetails(5, 5, 0, 0); 
     dbAdapter.insertDetails(6, 6, 0, 0); 
     dbAdapter.insertDetails(7, 7, 0, 0); 
     dbAdapter.insertDetails(8, 8, 0, 0); 
     dbAdapter.insertDetails(9, 9, 0, 0); 
     dbAdapter.insertDetails(10, 10, 0, 0); 
     dbAdapter.insertDetails(11, 11, 0, 0); 
     dbAdapter.insertDetails(12, 12, 0, 0); 
} 

package com.s.wrestlernicknames; 

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

public class DBAdapter { 
    SQLiteDatabase db; 
    DBHelper dbHelper; 
    Context context; 


    public DBAdapter(Context c) { 
     this.context = c; 
    } 

    public DBAdapter openToRead() { 
     dbHelper = new DBHelper(context); 
     db = dbHelper.getReadableDatabase(); 
     return this; 
    } 

    public DBAdapter openToWrite() { 
     dbHelper = new DBHelper(context); 
     db = dbHelper.getWritableDatabase(); 
     return this; 
    } 

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

    public long insertDetails(int id, int level, int totalTime, int score) {//Function that is being called to insert the values. 
     ContentValues contentValues = new ContentValues(); 
     contentValues.put(DBHelper.C_ID, id); 
     contentValues.put(DBHelper.LEVEL, level); 
     contentValues.put(DBHelper.TIME, totalTime); 
     contentValues.put(DBHelper.SCORE, score); 
     openToWrite(); 
     long val = db.insert(DBHelper.TABLE_NAME, null, contentValues); 
     close(); 
     return val; 
    } 

    public Cursor queryName() { 
     String[] column = {DBHelper.C_ID, DBHelper.LEVEL, DBHelper.TIME, DBHelper.SCORE}; 
     openToWrite(); 
     Cursor cursor = db.query(DBHelper.TABLE_NAME, column, null, null, null, null, null); 
     return cursor; 
    } 

    public long updateDetails(int id, int level, int totalTime, int score) { 
     ContentValues contentValues = new ContentValues(); 
     contentValues.put(DBHelper.C_ID, id); 
     contentValues.put(DBHelper.LEVEL, level); 
     contentValues.put(DBHelper.TIME, totalTime); 
     contentValues.put(DBHelper.SCORE, score); 
     openToWrite(); 
     long val = db.update(DBHelper.TABLE_NAME, contentValues, DBHelper.C_ID+"="+id, null); 
     close(); 
     return val; 
    } 
} 

Класс, который создает базу данных:

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

public class DBHelper extends SQLiteOpenHelper { 

    public static final String DATABASE_NAME = "data"; 
    public static final String TABLE_NAME = "score_table"; 
    public static final String C_ID = "_id"; 
    public static final String LEVEL = "level"; 
    public static final String SCORE = "score"; 
    public static final String TIME = "time"; 
    public static final int VERSION = 1; 

    private final String createDB = "create table if not exists "+ TABLE_NAME + "(" 
      + C_ID + " integer primary key, " 
      + LEVEL + " integer, " 
      + SCORE + " integer, " 
      + TIME + " integer); "; 

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

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     // TODO Auto-generated method stub 
     db.execSQL(createDB); 
    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     // TODO Auto-generated method stub 
     db.execSQL("drop table "+ TABLE_NAME); 
    } 

} 

StackTrace:

07-01 01:01:28.429: E/AndroidRuntime(1193): FATAL EXCEPTION: main 
07-01 01:01:28.429: E/AndroidRuntime(1193): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.s.wrestlernicknames/com.s.wrestlernicknames.AllLevels}: java.lang.NullPointerException 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1955) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at android.app.ActivityThread.access$600(ActivityThread.java:122) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at android.os.Handler.dispatchMessage(Handler.java:99) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at android.os.Looper.loop(Looper.java:137) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at android.app.ActivityThread.main(ActivityThread.java:4340) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at java.lang.reflect.Method.invoke(Method.java:511) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at dalvik.system.NativeStart.main(Native Method) 
07-01 01:01:28.429: E/AndroidRuntime(1193): Caused by: java.lang.NullPointerException 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at com.s.wrestlernicknames.AllLevels.onCreate(AllLevels.java:53) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at android.app.Activity.performCreate(Activity.java:4465) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1919) 
07-01 01:01:28.429: E/AndroidRuntime(1193):  ... 11 more 
07-01 01:01:31.259: I/Process(1193): Sending signal. PID: 1193 SIG: 9 

Я проверил много вещей, как близко() заявление, синтаксисах, структурирование и т.д. Любая помощь быть оцененным. Я знаю, что делаю некоторые основные ошибки, просто не могу понять.

Answer 1

я не понял, что это проблема, и это reccomented поставить LogCat реестра для нас каким-либо образом это происходит не так:

private final String createDB = "create table if not exists "+ TABLE_NAME + "(" 
     + C_ID + " integer primary key, " 
     + LEVEL + " integer, " 
     + SCORE + " integer, " 
     + TIME + " integer); "; 

изменить его:

 private final String createDB = "create table if not exists "+ TABLE_NAME + " (" 
     + C_ID + " integer primary key, " 
     + LEVEL + " integer, " 
     + SCORE + " integer, " 
     + TIME + " integer " + ");"); 

Answer 2

Вам необходимо указать возвращаемое значение opentowrite() на db

db = openToWrite(); 
long val = db.insert(DBHelper.TABLE_NAME, null, contentValues);