将初始数据插入sql lite android

我正在开发一个费用跟踪器，我想在应用程序首次启动时用一些记录填充数据库。 我试图在我的splash活动中调用该方法并添加数据。 但是当我清除我的应用程序数据并首次启动应用程序时，会发生错误，说没有这样的列。

log 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.(SQLiteProgram.java:58) 06-30 18:10:00.856: E/AndroidRuntime(18380): at android.database.sqlite.SQLiteQuery.(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 

如何在应用程序首次启动时填充数据！ 它只有少数记录，所以我不担心性能。

这将是一个很大的帮助！

谢谢。

数据库代码

 public void onCreate(SQLiteDatabase db) { // Create user table 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" + ")"; db.execSQL(CREATE_USER_TABLE); db.execSQL(CREATE_EXPENSE_TYPE_TABLE); } 

方法我用来添加记录

 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"; 

Answer 1

养成很好地格式化代码的习惯。 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 " + ")"; 

Answer 2

android.database.sqlite.SQLiteException：没有这样的列：exp_type（代码1）:,同时编译：SELECT * FROM expense_type Order BY exp_type DESC

这是你的错误：

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

INTEGER AUTOINCREMENT后需要一个空格

 KEY_EXPENSE_ID + " INTEGER AUTOINCREMENT" + KEY_EXPENSE_TYPE 

评估为：

“id integer autoincrementexp_type”

Answer 3

尝试在您的user preferences / shared preferences添加一个标志来检查首次运行的应用程序，然后在返回时您可以决定是否要创建数据库或阅读它！
看看这里http://www.vogella.com/articles/AndroidSQLite/article.html
编辑
或者只是检查dbexists而不是用户pref标志

Answer 4

 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上

 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(); } 

并添加数据

  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(); }