SQLite数据库崩溃打开

我需要在我的android应用程序上使用SQLite数据库，但是当我尝试打开它时，它崩溃了，我找不到原因。我在过去的一个小时里看了一下网络，但有点找不到任何帮助。SQLite数据库崩溃打开

下面是代码：

public class PrivDB { 

public static final String KEY_ROWID = "_id"; 
public static final String KEY_LEVEL = "level"; 
public static final String KEY_LOCKED = "locked"; 
public static final String KEY_SEQUENCE = "sequence"; 
public static final String KEY_TRIES = "tries"; 

private static final String DATABASE_NAME = "patdb"; 
private static final String DATABASE_TABLE = "tablename"; 
private static final int DATABASE_VERSION = 1; 

private DbHelper ourHelper; 
private 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 arg0) { 
     // TODO Auto-generated method stub 
     arg0.execSQL("CREATE TABLE " + DATABASE_TABLE + " ("+ 
        KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, "+ 
        KEY_LEVEL + " STRING NOT NULL, " + 
        KEY_LOCKED + " INTEGER NOT NULL, " + 
        KEY_SEQUENCE + " INTEGER NOT NULL, "+ 
        KEY_TRIES + " INTEGER NOT NULL);"); 
    } 

    @Override 
    public void onUpgrade(SQLiteDatabase arg0, int arg1, int arg2) { 
     // TODO Auto-generated method stub 
     arg0.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE); 
     onCreate(arg0); 
    } 

} 

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

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

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

public long createEntry (String level, int locked, int sequence, int tries){ 
    ContentValues cv = new ContentValues(); 
    cv.put(KEY_LEVEL, level); 
    cv.put(KEY_LOCKED, locked); 
    cv.put(KEY_SEQUENCE, sequence); 
    cv.put(KEY_TRIES, tries); 
    return ourDatabase.insert(DATABASE_TABLE, null, cv); 
} 

public String getData() { 
    String[] columns = new String[]{KEY_ROWID, KEY_LEVEL, KEY_LOCKED, KEY_SEQUENCE, KEY_TRIES}; 
    Cursor c = ourDatabase.query(DATABASE_TABLE, columns, null, null, null, null, null); 
    String result = ""; 

    int iRow = c.getColumnIndex(KEY_ROWID); 
    int iLevel = c.getColumnIndex(KEY_LEVEL); 
    int iLocked = c.getColumnIndex(KEY_LOCKED); 
    int iSequence = c.getColumnIndex(KEY_SEQUENCE); 
    int iTries = c.getColumnIndex(KEY_TRIES); 

    for(c.moveToFirst(); !c.isAfterLast(); c.moveToNext()){ 
     result = result + c.getString(iRow) + " " + c.getString(iLevel) + " " + c.getString(iLocked) + " " 
       + c.getString(iSequence) + c.getString(iTries) + "\n"; 
    } 

    return result; 
} 

public int getLocked(String s) throws SQLException { 
    String[] columns = new String[]{KEY_ROWID, KEY_LEVEL, KEY_LOCKED, KEY_SEQUENCE, KEY_TRIES}; 
    Cursor c = ourDatabase.query(DATABASE_TABLE, columns, KEY_LEVEL + "=" + s, null, null, null, null); 
    if(c != null){ 
     c.moveToFirst(); 
     int locked = c.getInt(2); 
     return locked; 
    } 
    return (Integer) null; 
} 

public void updateEntry(String s, int locked, int tries) throws SQLException { 
    ContentValues cvUpdate = new ContentValues(); 
    cvUpdate.put(KEY_LOCKED, locked); 
    cvUpdate.put(KEY_TRIES, tries); 
    ourDatabase.update(DATABASE_TABLE, cvUpdate, KEY_LEVEL + "=" + s, null); 
} 

}

和我是怎么调用数据库：

public class Stats extends Activity { 

TextView tv; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.stats); 
    tv = (TextView) findViewById(R.id.tvStats); 
    PrivDB info = new PrivDB(this); 
    info.open(); 
    String data = info.getData(); 
    info.close(); 
    tv.setText(data); 
} 

}

当我打开Stats类，应用程序崩溃，但如果我注释掉info.open()直到info.close()然后它工作正常（但显然没有任何反应）。

UPDATE

这里是日志猫输出：

01-09 13:16:32.786: E/AndroidRuntime(517): FATAL EXCEPTION: main 
01-09 13:16:32.786: E/AndroidRuntime(517): java.lang.RuntimeException: Unable to start activity  ComponentInfo{com.docime.vamoose.patternz/com.docime.vamoose.patternz.Stats}:  java.lang.StringIndexOutOfBoundsException 
01-09 13:16:32.786: E/AndroidRuntime(517): at  android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
01-09 13:16:32.786: E/AndroidRuntime(517): at  android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
01-09 13:16:32.786: E/AndroidRuntime(517): at  android.app.ActivityThread.access$2300(ActivityThread.java:125) 
01-09 13:16:32.786: E/AndroidRuntime(517): at  android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
01-09 13:16:32.786: E/AndroidRuntime(517): at  android.os.Handler.dispatchMessage(Handler.java:99) 
01-09 13:16:32.786: E/AndroidRuntime(517): at android.os.Looper.loop(Looper.java:123) 
01-09 13:16:32.786: E/AndroidRuntime(517): at android.app.ActivityThread.main(ActivityThread.java:4627) 
01-09 13:16:32.786: E/AndroidRuntime(517): at java.lang.reflect.Method.invokeNative(Native  Method) 
01-09 13:16:32.786: E/AndroidRuntime(517): at java.lang.reflect.Method.invoke(Method.java:521) 
01-09 13:16:32.786: E/AndroidRuntime(517): at  com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
01-09 13:16:32.786: E/AndroidRuntime(517): at  com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
01-09 13:16:32.786: E/AndroidRuntime(517): at dalvik.system.NativeStart.main(Native Method) 
01-09 13:16:32.786: E/AndroidRuntime(517): Caused by: java.lang.StringIndexOutOfBoundsException 
01-09 13:16:32.786: E/AndroidRuntime(517): at  android.app.ContextImpl.validateFilePath(ContextImpl.java:1579) 
01-09 13:16:32.786: E/AndroidRuntime(517): at  android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:539) 
01-09 13:16:32.786: E/AndroidRuntime(517): at  android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:203) 
01-09 13:16:32.786: E/AndroidRuntime(517): at  android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:98) 
01-09 13:16:32.786: E/AndroidRuntime(517): at  com.docime.vamoose.patternz.PrivDB.open(PrivDB.java:60) 
01-09 13:16:32.786: E/AndroidRuntime(517): at  com.docime.vamoose.patternz.Stats.onCreate(Stats.java:18) 
01-09 13:16:32.786: E/AndroidRuntime(517): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
01-09 13:16:32.786: E/AndroidRuntime(517): at    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
01-09 13:16:32.786: E/AndroidRuntime(517): ... 11 more

来源

2014-01-09 VaMoose

如果发生崩溃，logcat中会出现异常stacktrace。请将其包含在问题中。 – laalto

好的，你根据邹邹的评论更新了代码 - 还有问题吗？ – laalto

将STRING更改为TEXT。在onCreate（）中。 –

你从来没有通过DATABASE_TABLE名称或代码，你分配给它。这就是它崩溃的原因。

private static final String DATABASE_TABLE = "TABLE_NAME";

更新：请更新您的onCreate()。 SQLite的询问服务TEXT instedOf String

@Override 
public void onCreate(SQLiteDatabase arg0) { 
    // TODO Auto-generated method stub 
    arg0.execSQL("CREATE TABLE " + DATABASE_TABLE + " ("+ 
       KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, "+ 
       KEY_LEVEL + " TEXT NOT NULL, " + 
       KEY_LOCKED + " INTEGER NOT NULL, " + 
       KEY_SEQUENCE + " INTEGER NOT NULL, "+ 
       KEY_TRIES + " INTEGER NOT NULL);"); 
}

另一个重要的事情要传递的背景之下，使用静态变量不会保存。你应该使用像下面

private static Context ourContext; 

public PrivDB (Context c) { 
    this.ourContext = c; 
}

但最重要的，因为你所面对的错误/异常

产生的原因：java.lang.StringIndexOutOfBoundsException，

这Thrown when the a string is indexed with a value less than zero, or greater than or equal to the size of the array

我会要求你检查以下 - java.lang.StringIndexOutOfBoundsException: index=0 length=0 in get sqlite database

来源

2014-01-09 11:23:01 Yup

忘了在帖子中添加那些，它是在课堂上，但它仍然崩溃 – VaMoose

@VaMoose - 请检查更新。 – Yup

变化STRING到TEXT以下

arg0.execSQL("CREATE TABLE " + DATABASE_TABLE + " ("+ 
       KEY_ROWID + " INTEGER PRIMARY KEY AUTOINCREMENT, "+ 
       KEY_LEVEL + " STRING NOT NULL, " + 
       KEY_LOCKED + " INTEGER NOT NULL, " + 
       KEY_SEQUENCE + " INTEGER NOT NULL, "+ 
       KEY_TRIES + " INTEGER NOT NULL);");

NOTE :变化后，请添加一个到你的数据库版本

来源

2014-01-09 11:33:33

我觉得您的信息指向空试试这个代码：

if (null != info) 
{ 
    info.open(); 
    String data = info.getData(); 
    info.close(); 
}else 
Log.d("App Name", "Info is null");

getData（）函数的另外一件事是您正在读取数据库所以您应该以读模式打开数据库。

ourDatabase = ourHelper.getWritableDatabase(); To 
ourDatabase = ourHelper.getReadableDatabase();

来源

2014-01-09 11:43:50

此行KEY_TRIES + " INTEGER NOT NULL);");有两个; .Does你的表中获取创建/填充？

来源

2014-01-09 11:55:00 PsyGik

你从哪里得到';'两次。仔细检查rawSQL，最后一个是关闭'arg0.execSQL（）'。 – Yup

'由java.lang.StringIndexOutOfBoundsException引起的'这可能意味着表没有被创建，或者他引用了错误的列。而对于rawSQL，';'不使用IMO。我一直使用没有';'和完美的作品。 – PsyGik

你可以请结帐以下文档教程，rawSQL';'是不是例外 - http://developer.android.com/guide/topics/data/data-storage.html#db – Yup

SQLite数据库崩溃打开

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