问关于Android电视中的EPG数据

EN

import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * Created by Ahmed on 18/07/2017.
 */

public class DatabaseHelper extends SQLiteOpenHelper {

    String DB_PATH=null;
    private static String DB_NAME="tvls -";
    private SQLiteDatabase myDataBase;
    private final Context myContext;


    public DatabaseHelper(Context context) {
        super(context, DB_NAME, null   , 10);
        this.myContext=context;
        this.DB_PATH="/data/data/com.android.providers.tv/databases";
        Log.e("Path 1",DB_PATH);
    }
    public void createDataBase() throws IOException{
        boolean dbExist = checkDataBase();
        Log.i("Database Existe ?",""+dbExist);
        if (dbExist){

        }else{
            this.getReadableDatabase();
            try {
                copyDataBase();
            } catch (Exception e ) {
                throw new Error("Error coying database");
            }
        }
    }

    private void copyDataBase() throws IOException {
        InputStream myInput = myContext.getAssets().open(DB_NAME);
        String outFileName = DB_PATH + DB_NAME;
        OutputStream myOutput = new FileOutputStream(outFileName);
        byte[] buffer = new byte[10];
        int length;
        while ((length=myInput.read(buffer))>0){
            myOutput.write(buffer,0,length);

        }
        myOutput.flush();
        myOutput.close();
        myInput.close();
    }

    private boolean checkDataBase() {
        SQLiteDatabase checkDB = null;
        try{
            String myPath= DB_PATH + DB_NAME;
            checkDB = SQLiteDatabase.openDatabase(myPath,null,SQLiteDatabase.OPEN_READONLY);

        }catch (SQLiteException e){
            e.printStackTrace();
        }
        if (checkDB !=null){
            checkDB.close();
        }
        return checkDB != null ? true : false;


    }
public void openDataBase() throws SQLException{
    String myPath= DB_PATH + DB_NAME;
    myDataBase = SQLiteDatabase.openDatabase(myPath,null,SQLiteDatabase.OPEN_READONLY);

}

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

    @Override
    public void onCreate(SQLiteDatabase db) {}

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        if (newVersion > oldVersion)
            try {
                copyDataBase();
            } catch (IOException e) {
                e.printStackTrace();

            }
    }
    public Cursor query(String table, String[] columns, String selection, String[] selectionArgs, String groupBy, String having, String orderBy) {
        return myDataBase.query("channels", null, null, null, null, null, null);
    }
}