如何在Android应用程序的单个数据库中创建两个表？

我在Sqllite Android应用程序中创建了一个数据库，我尝试在我的数据库中添加两个表，但是我有问题来创建该数据库。 仅创建第一个表。 有谁能够帮我？

package com.android.cdtech; import java.sql.SQLException; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import android.util.Log; public class saveData { public static final String KEY_ROWID = "rowid"; public static final String KEY_DATE = "Date";public static final String KEY_NAME = "CustomerName";public static final String KEY_AMOUNT = "Amount";public static final String KEY_BANK = "Banks"; private static final String TAG = "DBAdapter"; public static final String KEY_BUSNAME="BusinessName";public static final String KEY_ADD="Address";public static final String KEY_CPERSON="ContactPerson";; private static final String DATABASE_NAME = "EXPORTDETAILS"; private static final String DATABASE_TABLE = "Payment"; private static final String DATABASE_TABLE2 = "Customer"; private static final int DATABASE_VERSION = 1; private static String DATABASE_CREATE = "create table Payment (_id integer primary key autoincrement, " + "Date text not null,"+"CustomerName text not null,"+"Amount text not null,"+"Banks text not null);"; private static final String DATABASE_CREATECUS = "create table Customer (_id integer primary key autoincrement, " + "BusinessName text not null,"+"Address text not null,"+"ContactPerson text not null,"+"PhoneNumber text not null,);"; private final Context context; private DatabaseHelper DBHelper; private SQLiteDatabase db; public saveData(Context ctx) { this.context = ctx; DBHelper = new DatabaseHelper(context); } private static class DatabaseHelper extends SQLiteOpenHelper { DatabaseHelper(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } @Override public void onCreate(SQLiteDatabase db) { db.execSQL(DATABASE_CREATE); db.execSQL(DATABASE_CREATECUS); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { Log.w(TAG, "Upgrading database from version " + oldVersion + " to " + newVersion + ", which will destroy all old data"); db.execSQL("DROP TABLE IF EXISTS titles"); onCreate(db); } } public saveData open()throws SQLException { db=DBHelper.getWritableDatabase(); return this; } public void close() { DBHelper.close(); } public long insert(String Date,String CustomerName,String Amount,String Banks) { // TODO Auto-generated method stub ContentValues cv=new ContentValues(); cv.put(KEY_DATE,Date); cv.put(KEY_NAME,CustomerName); cv.put(KEY_AMOUNT,Amount); cv.put(KEY_BANK,Banks); return db.insert(DATABASE_TABLE, null,cv); } public long insertForm(String BusinessName ,String Address ,String ContactPerson) { // TODO Auto-generated method stub ContentValues cv=new ContentValues(); cv.put(KEY_BUSNAME,BusinessName); cv.put(KEY_ADD,Address); cv.put(KEY_CPERSON,ContactPerson); } public Cursor getlatlng() { Cursor latlngCursor = db.rawQuery("select * from " + DATABASE_TABLE,null); if (latlngCursor != null) { latlngCursor.moveToFirst(); } db.close(); return latlngCursor; } public Cursor order() { Cursor latlngCursor = db.rawQuery("select * from " + DATABASE_TABLE2,null); if (latlngCursor != null) { latlngCursor.moveToFirst(); } db.close(); return latlngCursor; } } 

错误代码= 1否客户的此类表

Answer 1

 use below two class package Your 'packagename'; import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import android.util.Log; public class DBHelper extends SQLiteOpenHelper { private static final String DATABASE_NAME = "BistroDB"; private static final int DATABASE_VERSION =1; // Database creation sql statement public static final String Table1= "create table table1name ("Your cloumns");"; public static final String Table2 = "create table table2name ("Your cloumns");"; public DBHelper(Context context) { super(context, DATABASE_NAME, null, DATABASE_VERSION); } // Method is called during creation of the database @Override public void onCreate(SQLiteDatabase database) { database.execSQL(table1); database.execSQL(table2); } // Method is called during an upgrade of the database, eg if you increase // the database version @Override public void onUpgrade(SQLiteDatabase database, int oldVersion, int newVersion) { Log.w(DBHelper.class.getName(), "Upgrading database from version " + oldVersion + " to " + newVersion + ", which will destroy all old data"); database.execSQL("DROP TABLE IF EXISTS table1"); database.execSQL("DROP TABLE IF EXISTS table2"); onCreate(database); } public boolean deleteDatabase(Context context) { return context.deleteDatabase(DATABASE_NAME); } } 

使用下面的类将值插入表中

  package 'Your package name'; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.SQLException; import android.database.sqlite.SQLiteDatabase; public class DataBaseAdapter { // Database fields private Context context; private SQLiteDatabase database; private DBHelper dbHelper; public DataBaseAdapter(Context context) { this.context = context; } public DataBaseAdapter open() throws SQLException { dbHelper = new DBHelper(context); database = dbHelper.getWritableDatabase(); return this; } public void close() { dbHelper.close(); } public Cursor fetchAllTAble1data() { return database.query("MenuData", new String[] { "id", "Title", "Image", "Description" }, null, null, null, null, null); } public Cursor fetchAllTable2data() { return database.query("RestaurantsData", new String[] { "restaurant_id", "name", "phone", "email", "open_days", "timing", "website", "loc_name", "street", "city", "longitude", "latitude", "zip" }, null, null, null, null, null); } public void deleteTable(String tablename){ database.execSQL("drop table if exists "+tablename+';'); } public void createIndividualTable(String query){ database.execSQL(query); } public void InsertTable1Data(TAble1 review) { ContentValues values = new ContentValues(); values.put("Name", review.Name); values.put("Email", review.Email); values.put("Comment", review.Comment); values.put("Rating", review.Rating); database.insert("ReviewsData", null, values); } public void InsertTable2Data(TAble2 photos) { ContentValues values = new ContentValues(); values.put("photo", photos.Photos); database.insert("PhotosData", null, values); } public ContentValues createContentValues(String category, String summary, String description) { ContentValues values = new ContentValues(); return values; } } 

Answer 2

尝试删除DATABASE_CREATECUS末尾的“，”