데이터베이스 업데이트시 앱 크래시

Question

이 데이터베이스를 만들었지 만 데이터베이스에 데이터를 추가하려고하면 앱이 작동을 멈췄습니다. (크래시)

내가 addSigarette 또는 addUser 메소드를 사용할 때이 문제가 발생합니다.

코드 :

package com.amaze.quit.app; 

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


public class DatabaseHandler extends SQLiteOpenHelper { 



// All Static variables 
// Database Version 
private static final int DATABASE_VERSION = 1; 

// Database Name 
private static final String DATABASE_NAME = "QuitSmokeDatabase"; 

// table names 
private static final String TABLE_USER = "users"; 
private static final String TABLE_SIGARETTEN = "sigaretten"; 


// User Table Columns names 
private static final String USER_UID = "uID"; 
private static final String USER_SID = "sID"; 
private static final String USER_PERDAG = "per_dag"; 
private static final String USER_LEVEL = "level"; 


// Sigaretten Table Columns names 
private static final String SIGARETTEN_SID = "sID"; 
private static final String SIGARETTEN_MERK = "merk"; 
private static final String SIGARETTEN_AANTAL = "aantal"; 
private static final String SIGARETTEN_TEER = "teer"; 
private static final String SIGARETTEN_NICOTINE = "nicotine"; 
private static final String SIGARETTEN_PRIJS = "prijs"; 



public DatabaseHandler(Context context) { 
    super(context, DATABASE_NAME, null, DATABASE_VERSION); 
} 


/* creating Tables */ 
@Override 
public void onCreate(SQLiteDatabase db) { 
    /* User table */ 
    String CREATE_USER_TABLE = "CREATE TABLE " 
      + TABLE_USER + "(" 
      + USER_UID + " INTEGER PRIMARY KEY," 
      + USER_SID + " INTEGER," 
      + USER_PERDAG + " INTEGER," 
      + USER_LEVEL + " INTEGER" + ")"; 
    db.execSQL(CREATE_USER_TABLE); 

     /* Sigaretten table */ 
    String CREATE_SIGARETTEN_TABLE = "CREATE TABLE " 
      + TABLE_SIGARETTEN + "(" 
      + SIGARETTEN_SID + " INTEGER PRIMARY KEY," 
      + SIGARETTEN_MERK + " TEXT," 
      + SIGARETTEN_AANTAL + " INTEGER," 
      + SIGARETTEN_TEER + " REAL" 
      + SIGARETTEN_NICOTINE + " REAL" 
      + SIGARETTEN_PRIJS + " REAL" 
      + ")"; 
    db.execSQL(CREATE_SIGARETTEN_TABLE); 



} 

@Override 
public void onUpgrade(SQLiteDatabase db, int i, int i2) { 
    /*Drop older table if existed*/ 
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_USER); 

    db.execSQL("DROP TABLE IF EXISTS " + TABLE_SIGARETTEN); 

    /* Create tables again*/ 
    onCreate(db); 
} 

/* Adding new User*/ 
public void addUser(User user) { 
    SQLiteDatabase db = this.getWritableDatabase(); 
    ContentValues values = new ContentValues(); 
    values.put(USER_UID, user.getuID()); // user id 
    values.put(USER_SID, user.getsID()); // user sigaretten id 
    values.put(USER_PERDAG, user.getPerDag()); // hoeveel die smoked per dag 
    values.put(USER_LEVEL, user.getLevel()); // level van user. bij nieuwe user gewoon 1. 

    // Inserting Row 
    assert db != null; 
    db.insert(TABLE_USER, null, values); 
    db.close(); // Closing database connection 
} 

public void addSigarette(Sigaretten sigaret) { 
    SQLiteDatabase db = this.getWritableDatabase(); 
    ContentValues values = new ContentValues(); 
    values.put(SIGARETTEN_SID, sigaret.getsID()); 
    values.put(SIGARETTEN_MERK, sigaret.getMerk()); 
    values.put(SIGARETTEN_AANTAL, sigaret.getAantal()); 
    values.put(SIGARETTEN_TEER, sigaret.getTeer()); 
    values.put(SIGARETTEN_NICOTINE, sigaret.getNicotine()); 
    values.put(SIGARETTEN_PRIJS, sigaret.getPrijs()); 
    // Inserting Row 
    assert db != null; 
    db.insert(TABLE_SIGARETTEN, null, values); 
    db.close(); // Closing database connection 
} 













/* Getting single User*/ 
public User getUser(int id) { 
    SQLiteDatabase db = this.getReadableDatabase(); 

    assert db != null; 
    Cursor cursor = db.query(TABLE_USER, new String[] { 
        USER_UID, 
        USER_SID, 
        USER_PERDAG, 
        USER_LEVEL }, USER_UID + "=?", 
      new String[] { String.valueOf(id) }, null, null, null, null); 
    if (cursor != null) 
     cursor.moveToFirst(); 

    User user = new User(Integer.parseInt(cursor.getString(0)), 
      Integer.parseInt(cursor.getString(1)), 
      Integer.parseInt(cursor.getString(2)), 
      Integer.parseInt(cursor.getString(3))); 
    /* return contact */ 
    return user; 
} 

/* Getting single Sigarette*/ 
public Sigaretten getSigaret(int id) { 
    SQLiteDatabase db = this.getReadableDatabase(); 

    assert db != null; 
    Cursor cursor = db.query(TABLE_SIGARETTEN, new String[] { 
        SIGARETTEN_SID , 
        SIGARETTEN_MERK, 
        SIGARETTEN_AANTAL, 
        SIGARETTEN_TEER, 
        SIGARETTEN_NICOTINE, 
        SIGARETTEN_PRIJS}, SIGARETTEN_SID + "=?", 
      new String[] { String.valueOf(id) }, null, null, null, null); 
    if (cursor != null) 
     cursor.moveToFirst(); 

    Sigaretten sigaret = new Sigaretten(
      Integer.parseInt(cursor.getString(0)), 
      Float.parseFloat(cursor.getString(5)), 
      cursor.getString(2), 
      Integer.parseInt(cursor.getString(3)), 
      Float.parseFloat(cursor.getString(4)), 
      Float.parseFloat(cursor.getString(5))); 
    /* return sigaret */ 
    return sigaret; 
} 










} 

스택 트레이스 :

05-25 16:48:29.039 15123-15123/com.amaze.quit.app W/System.err﹕ java.lang.NullPointerException 
05-25 16:48:29.039 15123-15123/com.amaze.quit.app W/System.err﹕ at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224) 
05-25 16:48:29.039 15123-15123/com.amaze.quit.app W/System.err﹕ at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:164) 
05-25 16:48:29.039 15123-15123/com.amaze.quit.app W/System.err﹕ at com.amaze.quit.app.DatabaseHandler.addSigarette(DatabaseHandler.java:172) 
05-25 16:48:29.039 15123-15123/com.amaze.quit.app W/System.err﹕ at com.amaze.quit.app.SetupBrandAmount$1.onClick(SetupBrandAmount.java:115) 
05-25 16:48:29.049 15123-15123/com.amaze.quit.app W/System.err﹕ at android.view.View.performClick(View.java:4438) 
05-25 16:48:29.049 15123-15123/com.amaze.quit.app W/System.err﹕ at android.view.View$PerformClick.run(View.java:18422) 
05-25 16:48:29.049 15123-15123/com.amaze.quit.app W/System.err﹕ at android.os.Handler.handleCallback(Handler.java:733) 
05-25 16:48:29.049 15123-15123/com.amaze.quit.app W/System.err﹕ at android.os.Handler.dispatchMessage(Handler.java:95) 
05-25 16:48:29.049 15123-15123/com.amaze.quit.app W/System.err﹕ at android.os.Looper.loop(Looper.java:136) 
05-25 16:48:29.049 15123-15123/com.amaze.quit.app W/System.err﹕ at android.app.ActivityThread.main(ActivityThread.java:5017) 
05-25 16:48:29.049 15123-15123/com.amaze.quit.app W/System.err﹕ at java.lang.reflect.Method.invokeNative(Native Method) 
05-25 16:48:29.049 15123-15123/com.amaze.quit.app W/System.err﹕ at java.lang.reflect.Method.invoke(Method.java:515) 
05-25 16:48:29.049 15123-15123/com.amaze.quit.app W/System.err﹕ at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779) 
05-25 16:48:29.049 15123-15123/com.amaze.quit.app W/System.err﹕ at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595) 
05-25 16:48:29.049 15123-15123/com.amaze.quit.app W/System.err﹕ at dalvik.system.NativeStart.main(Native Method) 

Answer 1

당신은 여기에서 쉼표 몇이 누락 : onCreate()를 수정 한 후

+ SIGARETTEN_TEER + " REAL," 
+ SIGARETTEN_NICOTINE + " REAL," 

를, 그래서 가능한 기존 코드를 제거 데이터베이스 파일이 제거됩니다. 그래도 문제가 발생하면 질문에 예외 스택 추적을 포함 시키십시오.

getDatabaseLocked()의 NPE : 도우미 생성자에 null Context을 전달했습니다.