Question

如何将android SqLite表同步到MySQL DB服务器？我正在使用我的现有数据库与Android应用程序。有没有办法点击同步按钮，数据库将从在线自动更新？ android中是否有任何库类用于将本地数据库与服务器数据库同步？

请先将此问题作为副本查看我的代码，CL提供的上述问题只是理论上的，但我面临的问题是我的应用程序还有其他任何示例请分享您的知识和任何更好的示例。< / p>

如果有更好的解决方案，请帮助我。

这是我的DataBaseHepler.java适配器

    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.OutputStream;
    import android.content.Context;
    import android.database.Cursor;
    import android.database.SQLException;
    import android.database.sqlite.SQLiteDatabase;
    import android.database.sqlite.SQLiteOpenHelper;
    import android.util.Log;

    public class DataBaseHelper extends SQLiteOpenHelper
    {
        private static String TAG = "DataBaseHelper"; // Tag just for the LogCat window
        //destination path (location) of our database on device
        private static String DB_PATH = "";
        private static String DB_NAME ="SBLdata.db";// Database name
        private SQLiteDatabase mDataBase;
        private final Context mContext;

        public DataBaseHelper(Context context, String dbName)
        {
            super(context, DB_NAME, null, 1);// 1? its Database Version
            if(android.os.Build.VERSION.SDK_INT >= 17){
                DB_PATH = context.getApplicationInfo().dataDir + "/databases/";
            }
            else
            {
                DB_PATH = "/data/data/" + context.getPackageName() + "/databases/";
            }
            this.mContext = context;
        }

        public void createDataBase() throws IOException
        {
            //If database not exists copy it from the assets

            boolean mDataBaseExist = checkDataBase();
            if(!mDataBaseExist)
            {
                this.getReadableDatabase();
                this.close();
                try
                {
                    //Copy the database from assests
                    copyDataBase();
                    Log.e(TAG, "createDatabase database created");
                }
                catch (IOException mIOException)
                {
                    throw new Error("ErrorCopyingDataBase");
                }
            }
        }
        //Check that the database exists here: /data/data/your package/databases/Da Name
        private boolean checkDataBase()
        {
            File dbFile = new File(DB_PATH + DB_NAME);
            //Log.v("dbFile", dbFile + "   "+ dbFile.exists());
            return dbFile.exists();
        }

        //Copy the database from assets
        private void copyDataBase() throws IOException
        {
            InputStream mInput = mContext.getAssets().open(DB_NAME);
            String outFileName = DB_PATH + DB_NAME;
            OutputStream mOutput = new FileOutputStream(outFileName);
            byte[] mBuffer = new byte[1024];
            int mLength;
            while ((mLength = mInput.read(mBuffer))>0)
            {
                mOutput.write(mBuffer, 0, mLength);
            }
            mOutput.flush();
            mOutput.close();
            mInput.close();
        }

        //Open the database, so we can query it
        public boolean openDataBase() throws SQLException
        {
            String mPath = DB_PATH + DB_NAME;
            //Log.v("mPath", mPath);
            mDataBase = SQLiteDatabase.openDatabase(mPath, null, SQLiteDatabase.CREATE_IF_NECESSARY);
            //mDataBase = SQLiteDatabase.openDatabase(mPath, null, SQLiteDatabase.NO_LOCALIZED_COLLATORS);
            return mDataBase != null;
        }

        @Override
        public synchronized void close()
        {
            if(mDataBase != null)
                mDataBase.close();
            super.close();
        }


        @Override
        public void onCreate(SQLiteDatabase db) {}
        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {}


}

请帮帮我？

如何在线Android同步和更新SQLite数据库表

0 个答案: