کپی

[ashkan_gorg]

اگه بخوام فایلی رو از پوشه ای در گوشی کپی کنم در پوشه asset باید چکار کنم؟ممنون میشم کمک کنید

[#root#]

هیچ کار :لبخند: چون شدنی نیست

[ashkan_gorg]

در این صورت من یک فایل دارم به نام aaaدرون پوشه asset که از طریق دستورات زیر به دیتابیس متصل میشه حالا من کجای این دستورات رو تغییر بدم که جای اینکه از پوشه asset بخونه فایل دیتا بیس رو از پوشه درون masstorage به نام jafar بخونه.متشکرم.

package com.androidhive.dashboard;

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.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.Environment;

public class DatabaseUsers extends SQLiteOpenHelper {
String DB_PATH = null;
public static String DB_NAME = "aaa";

private SQLiteDatabase myDataBase;

private final Context myContext;

/**
* Constructor Takes and keeps a reference of the passed context in order to
* access to the application assets and resources.
*
* @param context
*/
public DatabaseUsers(Context context) {

super(context, DB_NAME, null, 1);
this.myContext = context;
DB_PATH = "/data/data/" + context.getPackageName() + "/" + "databases/";
}

/**
* Creates a empty database on the system and rewrites it with your own
* database.
* */
public void createDataBase() throws IOException {

boolean dbExist = checkDataBase();

if (dbExist) {
// do nothing - database already exist
copyDataBase();

} else {

// By calling this method and empty database will be created into
// the default system path
// of your application so we are gonna be able to overwrite that
// database with our database.
this.getReadableDatabase();

try {

copyDataBase();

} catch (IOException e) {

throw new Error("خطا در انتقال فایل به گوشی");

}
}

}

/**
* Check if the database already exist to avoid re-copying the file each
* time you open the application.
*
* @return true if it exists, false if it doesn't
*/
private boolean checkDataBase() {

SQLiteDatabase checkDB = null;

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

} catch (SQLiteException e) {

// database does't exist yet.

}

if (checkDB != null) {

checkDB.close();

}

return checkDB != null ? true : false;
}

/**
* Copies your database from your local assets-folder to the just created
* empty database in the system folder, from where it can be accessed and
* handled. This is done by transfering bytestream.
* */
private void copyDataBase() throws IOException {
// Open your local db as the input stream
InputStream myInput = myContext.getAssets().open(DB_NAME);
// Path to the just created empty db
String outFileName = DB_PATH + DB_NAME;

// Open the empty db as the output stream
OutputStream myOutput = new FileOutputStream(outFileName);

// transfer bytes from the inputfile to the outputfile
byte[] buffer = new byte[1024];
int length;
while ((length = myInput.read(buffer)) > 0) {
myOutput.write(buffer, 0, length);
}

// Close the streams
myOutput.flush();
myOutput.close();
myInput.close();

}

public void openDataBase() throws SQLException {

// Open the database
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) {

}

// return cursor
public Cursor query(String table, String[] columns, String selection,
String[] selectionArgs, String groupBy, String having,
String orderBy) {
return myDataBase

.query("EMP_TABLE", null, null, null, null, null, null) ;

}


}

[rubiks.kde]

بجای این خط

InputStream myInput = myContext.getAssets().open(DB_NAME);

باید از کدی مشابه به این استفاده کنید.

File myFile = new File("/sdcard/mysdfile.txt");
InputStream myInput = new FileInputStream(myFile);