错误：不存在此类表SQLite

Question

I have a SQLite database with two tables, one for holding Login information, such as Email adress and password, and the other one to hold GPS coordinates for the user. I create both tables in the OnCreate method in my DBadapter class "DatabaseHandler.class". The login table works perfectly but the Coordinates table doesn't. The program throws "no such table exists" when I try to access and run commands on it.

Logcat

01-22 12:42:06.769: E/AndroidRuntime(854): FATAL EXCEPTION: main
01-22 12:42:06.769: E/AndroidRuntime(854): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.androidbasic12/com.example.androidbasic12.map}: android.database.sqlite.SQLiteException: no such table: coord (code 1): , while compiling: SELECT * FROM coord WHERE name = name
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.app.ActivityThread.access$600(ActivityThread.java:141)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.os.Handler.dispatchMessage(Handler.java:99)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.os.Looper.loop(Looper.java:137)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.app.ActivityThread.main(ActivityThread.java:5039)
01-22 12:42:06.769: E/AndroidRuntime(854):  at java.lang.reflect.Method.invokeNative(Native Method)
01-22 12:42:06.769: E/AndroidRuntime(854):  at java.lang.reflect.Method.invoke(Method.java:511)
01-22 12:42:06.769: E/AndroidRuntime(854):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
01-22 12:42:06.769: E/AndroidRuntime(854):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
01-22 12:42:06.769: E/AndroidRuntime(854):  at dalvik.system.NativeStart.main(Native Method)
01-22 12:42:06.769: E/AndroidRuntime(854): Caused by: android.database.sqlite.SQLiteException: no such table: coord (code 1): , while compiling: SELECT * FROM coord WHERE name = name
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:882)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:493)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1253)
01-22 12:42:06.769: E/AndroidRuntime(854):  at com.example.androidbasic12.library.DatabaseHandler.getLatLng(DatabaseHandler.java:155)
01-22 12:42:06.769: E/AndroidRuntime(854):  at com.example.androidbasic12.library.UserFunctions.getCoords(UserFunctions.java:124)
01-22 12:42:06.769: E/AndroidRuntime(854):  at com.example.androidbasic12.map.onCreate(map.java:56)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.app.Activity.performCreate(Activity.java:5104)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
01-22 12:42:06.769: E/AndroidRuntime(854):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
01-22 12:42:06.769: E/AndroidRuntime(854):  ... 11 more

DatabaseHandler.class

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 = "android_api";

//Carcoord table name
private static final String TABLE_CARCOORD = "coord";
// carcoord table columns names
private static final String CAR_KEY_ID = "id";
private static final String CAR_KEY_NAME = "name";
private static final String CAR_KEY_LAT = "lat";
private static final String CAR_KEY_LNG = "lng";


// Login table name
private static final String TABLE_LOGIN = "login";
// Login Table Columns names
private static final String KEY_ID = "id";
private static final String KEY_NAME = "name";
private static final String KEY_EMAIL = "email";
private static final String KEY_UID = "uid";
private static final String KEY_CREATED_AT = "created_at";

//Strings that handles create table querys
private static final String CREATE_LOGIN_TABLE = "CREATE TABLE " + TABLE_LOGIN + "("
        + KEY_ID + " INTEGER PRIMARY KEY," 
        + KEY_NAME + " TEXT,"
        + KEY_EMAIL + " TEXT UNIQUE,"
        + KEY_UID + " TEXT,"
        + KEY_CREATED_AT + " TEXT" + ")";
private static final String CREATE_CARCOORD_TABLE = "CREATE TABLE " + TABLE_CARCOORD + "("
        + CAR_KEY_ID + " INTEGER PRIMARY KEY,"
        + CAR_KEY_NAME + " TEXT,"
        + CAR_KEY_LAT + " TEXT,"
        + CAR_KEY_LNG + " TEXT" + ")";

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

// Creating Tables
@Override
public void onCreate(SQLiteDatabase db) {
    db.execSQL(CREATE_LOGIN_TABLE);
    db.execSQL(CREATE_CARCOORD_TABLE);

}

// Upgrading database
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    // Drop older table if existed
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_LOGIN);
    db.execSQL("DROP TABLE IF EXISTS " + TABLE_CARCOORD);

    // Create tables again
    onCreate(db);
}

/**
 * Store coordinates in TABLEE_COORDS
 */
public void addCoord(String name, String lat, String lng){
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues values = new ContentValues();
    values.put(KEY_NAME, name); // Name
    values.put(CAR_KEY_LAT, lat); // latitude
    values.put(CAR_KEY_LNG, lng); //Longitude

    // Inserting row
    db.insert(TABLE_CARCOORD, null, values);
    db.close(); // Closing writable database connection
}

/**
 * Storing user details in database
 * */
public void addUser(String name, String email, String uid, String created_at) {
    SQLiteDatabase db = this.getWritableDatabase();

    ContentValues values = new ContentValues();
    values.put(KEY_NAME, name); // Name
    values.put(KEY_EMAIL, email); // Email
    values.put(KEY_UID, uid); // Email
    values.put(KEY_CREATED_AT, created_at); // Created At

    // Inserting Row
    db.insert(TABLE_LOGIN, null, values);
    db.close(); // Closing database connection
}

/**
 * Getting user data from database
 * */
public HashMap<String, String> getUserDetails(){
    HashMap<String,String> user = new HashMap<String,String>();
    String selectQuery = "SELECT  * FROM " + TABLE_LOGIN;

    SQLiteDatabase db = this.getReadableDatabase();
    Cursor cursor = db.rawQuery(selectQuery, null);
    // Move to first row
    cursor.moveToFirst();
    if(cursor.getCount() > 0){
        user.put("name", cursor.getString(1));
        user.put("email", cursor.getString(2));
        user.put("uid", cursor.getString(3));
        user.put("created_at", cursor.getString(4));
    }
    cursor.close();
    db.close();
    // return user
    return user;
}


/**
 * Getting user login status
 * return true if rows are there in table
 * */
public int getRowCount() {
    String countQuery = "SELECT  * FROM " + TABLE_LOGIN;
    SQLiteDatabase db = this.getReadableDatabase();
    Cursor cursor = db.rawQuery(countQuery, null);
    int rowCount = cursor.getCount();
    db.close();
    cursor.close();
    // return row count
    return rowCount;
    }
public Cursor getUsername(){
    SQLiteDatabase db = this.getReadableDatabase();
    String query = ("SELECT * FROM " + TABLE_LOGIN + " WHERE name = " + KEY_NAME);
    Cursor cursor = db.rawQuery(query, null);
    return cursor;
}

public Cursor getLatLng(){
    SQLiteDatabase db = this.getReadableDatabase();
    String query = ("SELECT * FROM " + TABLE_CARCOORD + " WHERE name = " + CAR_KEY_NAME);
    Cursor cursor = db.rawQuery(query, null);
    return cursor;

}


/**
 * reset table TABLE_CARCOORD
 */
public void resetCarcoord(){
    SQLiteDatabase db = this.getWritableDatabase();
    db.delete(TABLE_CARCOORD, null, null);
    db.close();
}
/**
 * Re create database
 * Delete all tables and create them again
 * */
public void resetTables(){
    SQLiteDatabase db = this.getWritableDatabase();
    // Delete All Rows
    db.delete(TABLE_LOGIN, null, null);
    db.close();
}

}

Code snippet from UserFunctions.class where I use the table "coord".

    /**
 * Get lat and lng from TABLE_CARCOORDS
 */
public ArrayList<String> getCoords(Context context, String lat, String lng) {
    DatabaseHandler db = new DatabaseHandler(context);
    Cursor cursor = db.getLatLng();
    ArrayList<String> cordarr = new ArrayList<String>();
    if (cursor.moveToFirst()){
        lat = cursor.getString(cursor.getColumnIndex("lat"));
        lng = cursor.getString(cursor.getColumnIndex("lng"));
        cordarr.add(lat);
        cordarr.add(lng);
    }
cursor.close();
db.close();
return cordarr;
}

LogCats after fix

First problem

01-22 14:15:07.080: E/SQLiteDatabase(20980): close() was never explicitly called on database '/data/data/com.example.androidbasic12/databases/android_api' 
01-22 14:15:07.080: E/SQLiteDatabase(20980): android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:2072)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1126)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:1083)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.database.sqlite.SQLiteDatabase.openOrCreateDatabase(SQLiteDatabase.java:1170)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:844)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:228)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:157)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:231)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at com.example.androidbasic12.library.DatabaseHandler.getUsername(DatabaseHandler.java:146)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at com.example.androidbasic12.library.UserFunctions.getUname(UserFunctions.java:87)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at com.example.androidbasic12.DashboardActivity.onCreate(DashboardActivity.java:59)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.app.Activity.performCreate(Activity.java:4470)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.app.ActivityThread.access$600(ActivityThread.java:127)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.os.Looper.loop(Looper.java:137)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at android.app.ActivityThread.main(ActivityThread.java:4511)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at java.lang.reflect.Method.invokeNative(Native Method)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at java.lang.reflect.Method.invoke(Method.java:511)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
01-22 14:15:07.080: E/SQLiteDatabase(20980):    at dalvik.system.NativeStart.main(Native Method)
01-22 14:15:07.080: E/System(20980): Uncaught exception thrown by finalizer
01-22 14:15:07.085: E/System(20980): java.lang.IllegalStateException: Don't have database lock!
01-22 14:15:07.085: E/System(20980):    at android.database.sqlite.SQLiteDatabase.verifyLockOwner(SQLiteDatabase.java:2230)
01-22 14:15:07.085: E/System(20980):    at android.database.sqlite.SQLiteDatabase$1.entryRemoved(SQLiteDatabase.java:2322)
01-22 14:15:07.085: E/System(20980):    at android.database.sqlite.SQLiteDatabase$1.entryRemoved(SQLiteDatabase.java:2318)
01-22 14:15:07.085: E/System(20980):    at android.util.LruCache.trimToSize(LruCache.java:197)
01-22 14:15:07.085: E/System(20980):    at android.util.LruCache.evictAll(LruCache.java:285)
01-22 14:15:07.085: E/System(20980):    at android.database.sqlite.SQLiteDatabase.deallocCachedSqlStatements(SQLiteDatabase.java:2283)
01-22 14:15:07.085: E/System(20980):    at android.database.sqlite.SQLiteDatabase.closeClosable(SQLiteDatabase.java:1255)
01-22 14:15:07.085: E/System(20980):    at android.database.sqlite.SQLiteDatabase.finalize(SQLiteDatabase.java:2043)
01-22 14:15:07.085: E/System(20980):    at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:185)
01-22 14:15:07.085: E/System(20980):    at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:168)
01-22 14:15:07.085: E/System(20980):    at java.lang.Thread.run(Thread.java:856)

Second error

01-22 14:15:07.435: E/AndroidRuntime(20980): FATAL EXCEPTION: main
01-22 14:15:07.435: E/AndroidRuntime(20980): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.androidbasic12/com.example.androidbasic12.map}: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
01-22 14:15:07.435: E/AndroidRuntime(20980):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1967)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at android.app.ActivityThread.access$600(ActivityThread.java:127)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at android.os.Handler.dispatchMessage(Handler.java:99)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at android.os.Looper.loop(Looper.java:137)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at android.app.ActivityThread.main(ActivityThread.java:4511)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at java.lang.reflect.Method.invokeNative(Native Method)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at java.lang.reflect.Method.invoke(Method.java:511)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at dalvik.system.NativeStart.main(Native Method)
01-22 14:15:07.435: E/AndroidRuntime(20980): Caused by: java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
01-22 14:15:07.435: E/AndroidRuntime(20980):    at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:251)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at java.util.ArrayList.get(ArrayList.java:304)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at com.example.androidbasic12.map.onCreate(map.java:57)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at android.app.Activity.performCreate(Activity.java:4470)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1052)
01-22 14:15:07.435: E/AndroidRuntime(20980):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
01-22 14:15:07.435: E/AndroidRuntime(20980):    ... 11 more

Answer 1

have you added below statement db.execSQL(CREATE_CARCOORD_TABLE); in starting only(i mean both table together), or you added it later after creating database.

I will suggest you to remove/uninstall the application from phone/emulator completely. and install it again and see what it says on execSQL method call. I think if above was the case with you it should probably work.

The Reason here is onCreate calls once when database is not created hence if it is called once when created db, later on if you add another table, onCreate wont be called hence no added table ll be created. so solution here is either remove app completely and install it again so onCreate ll call now. or increase our database version and do some handling.