Java 将初始数据插入sql lite android

我正在开发一个费用跟踪器，我想在应用程序第一次启动时用一些记录填充数据库。我试图在splash活动中调用该方法并添加数据。！但是，当我清除应用程序数据并第一次启动应用程序时，会出现一个错误，表示没有这样的列

日志cat错误如下所示

06-30 18:09:58.834: E/SQLiteLog(18380): (1) no such column: exp_type
06-30 18:10:00.826: D/AndroidRuntime(18380): Shutting down VM
06-30 18:10:00.826: W/dalvikvm(18380): threadid=1: thread exiting with uncaught exception (group=0x416b8318)
06-30 18:10:00.856: E/AndroidRuntime(18380): FATAL EXCEPTION: main
06-30 18:10:00.856: E/AndroidRuntime(18380): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.sliit.expenseanalyzer/com.sliit.expenseanalyzer.SplashActivity}: android.database.sqlite.SQLiteException: no such column: exp_type (code 1): , while compiling: SELECT * FROM expense_type Order BY exp_type DESC
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2063)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2088)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.app.ActivityThread.access$600(ActivityThread.java:134)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1199)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.os.Handler.dispatchMessage(Handler.java:99)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.os.Looper.loop(Looper.java:137)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.app.ActivityThread.main(ActivityThread.java:4744)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at java.lang.reflect.Method.invokeNative(Native Method)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at java.lang.reflect.Method.invoke(Method.java:511)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at dalvik.system.NativeStart.main(Native Method)
06-30 18:10:00.856: E/AndroidRuntime(18380): Caused by: android.database.sqlite.SQLiteException: no such column: exp_type (code 1): , while compiling: SELECT * FROM expense_type Order BY exp_type DESC
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:882)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:493)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1161)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1032)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1200)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at com.sliit.expenseanalyzer.util.DatabaseHandler.getAllExpenseTypes(DatabaseHandler.java:218)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at com.sliit.expenseanalyzer.SplashActivity.onCreate(SplashActivity.java:29)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.app.Activity.performCreate(Activity.java:5008)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
06-30 18:10:00.856: E/AndroidRuntime(18380):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2027)
06-30 18:10:00.856: E/AndroidRuntime(18380):    ... 11 more

我用来添加记录的方法

public Long addExpenseType(String expense) {
        SQLiteDatabase db = this.getWritableDatabase();

        ContentValues values = new ContentValues();
        values.put(KEY_EXPENSE_TYPE, expense);

        Long row = db.insert(TABLE_EXPENSE_TYPE, null, values);
        db.close();

        return row;
    }

字符串值：

    private static final int DATABASE_VERSION = 1;
    private static final String DATABASE_NAME = "expenseManager";

    // Database Tables
    private static final String TABLE_USER = "user";
    private static final String TABLE_EXPENSE_TYPE = "expense_type";

    // User table columns
    private static final String KEY_ID = "id";
    private static final String KEY_NAME = "full_name";
    private static final String KEY_PW = "password";
    private static final String KEY_EMAIL = "email";
    private static final String KEY_SESSION = "session";

    // Expense type table columns
    private static final String KEY_EXPENSE_ID = "id";
    private static final String KEY_EXPENSE_TYPE = "exp_type";

android.database.sqlite.SQLiteException:没有这样的列：exp\u type （代码1）：，编译时：按从费用类型订单中选择* exp_类型描述

这是您的错误：

String CREATE_EXPENSE_TYPE_TABLE = "CREATE TABLE " + TABLE_EXPENSE_TYPE
                + " (" + KEY_EXPENSE_ID + " INTEGER AUTOINCREMENT" +  
   KEY_EXPENSE_TYPE + " TEXT PRIMARY KEY" + ")

在

整数自动递增

KEY_EXPENSE_ID + " INTEGER AUTOINCREMENT" +  
       KEY_EXPENSE_TYPE

评估结果为：

---

“id integer autoincrementexp_type”

尝试在您的

用户首选项中添加一个标志来检查应用程序是否首先运行，然后返回后，您可以决定是创建数据库还是读取数据库！

看看这里

编辑

或者只检查是否存在DBF而不是user pref标志

private final String SAMPLE_DB_NAME = "TheftData";
    private final String SAMPLE_TABLE_NAME = "UserDetails";
    String CreateTable = "CREATE TABLE IF NOT EXISTS " +
            SAMPLE_TABLE_NAME +
            " (Username VARCHAR, Password VARCHAR," +                   
            " );";

然后在onCreate中

protected void onCreate(Bundle savedInstanceState) {
try {
        sampleDB =  this.openOrCreateDatabase(SAMPLE_DB_NAME, MODE_PRIVATE, null);

        sampleDB.execSQL(CreateTable);
        sampleDB.close();
        }

    catch(Exception e)
    {Toast.makeText(getApplicationContext(), " Error: "+e.getMessage(), Toast.LENGTH_LONG).show();
    sampleDB.close();
    }

和添加数据

 public void insertData(String username,String password)
    {

        sampleDB =  this.openOrCreateDatabase(SAMPLE_DB_NAME, MODE_PRIVATE, null);

        sampleDB.execSQL(CreateTable);
        sampleDB.execSQL("INSERT INTO " +
                SAMPLE_TABLE_NAME +
                " Values ('"+username+"','"+ password+"');");
        sampleDB.close();

    }

养成良好格式化代码的习惯。最后一列定义没有逗号：

    String CREATE_USER_TABLE = "CREATE TABLE " + TABLE_USER 
            + "(" 
            + KEY_ID      + " INTEGER PRIMARY KEY AUTOINCREMENT, " 
            + KEY_NAME    + " TEXT, "
            + KEY_EMAIL   + " TEXT, " 
            + KEY_PW      + " TEXT, "
            + KEY_SESSION + " INTEGER "
            + ")";

    String CREATE_EXPENSE_TYPE_TABLE = "CREATE TABLE " + TABLE_EXPENSE_TYPE
            + "(" 
            + KEY_EXPENSE_ID   + " INTEGER AUTOINCREMENT, "
            + KEY_EXPENSE_TYPE + " TEXT PRIMARY KEY "
            + ")";

请包括相关代码。请检查表创建代码。似乎您试图访问错误的列我想他是在要求表创建代码当您使用常量时，它没有告诉我们其中真正的字符串值。您必须提供该代码。在“”（“+KEY\u EXPENSE\u ID+“INTEGER AUTOINCREMENT”+KEY\u EXPENSE\u TYPE+"`自从我在数据库处理程序类中创建了表之后，它就应该有了！@DimalChandrasiri我在你的create语句中没有看到任何引用值exp_类型的代码。你所显示的只是对常量字符串的引用，而不是那些字符串的值。我已经添加了字符串！很抱歉没有首先添加它们！是逗号引起了我们的注意她不见了！
    String CREATE_USER_TABLE = "CREATE TABLE " + TABLE_USER 
            + "(" 
            + KEY_ID      + " INTEGER PRIMARY KEY AUTOINCREMENT, " 
            + KEY_NAME    + " TEXT, "
            + KEY_EMAIL   + " TEXT, " 
            + KEY_PW      + " TEXT, "
            + KEY_SESSION + " INTEGER "
            + ")";

    String CREATE_EXPENSE_TYPE_TABLE = "CREATE TABLE " + TABLE_EXPENSE_TYPE
            + "(" 
            + KEY_EXPENSE_ID   + " INTEGER AUTOINCREMENT, "
            + KEY_EXPENSE_TYPE + " TEXT PRIMARY KEY "
            + ")";