Java tutorial
//package com.java2s; import android.content.Context; import android.os.Environment; import android.util.Log; import android.widget.Toast; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.nio.channels.FileChannel; public class Main { /** * Create a backup of the database. * * @param context who calls the function. * @param dbName Name of the database to backup. (If empty, radiomap.db is used). */ public static void exportDb(Context context, String dbName) { try { if (dbName.equals("")) dbName = "radiomap.db"; File sd = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS); File data = Environment.getDataDirectory(); if (sd.canWrite()) { String currentDBPath = "//data//" + context.getApplicationContext().getPackageName() + "//databases//" + dbName; File currentDB = new File(data, currentDBPath); File backupDB = new File(sd, dbName); FileChannel src = new FileInputStream(currentDB).getChannel(); FileChannel dst = new FileOutputStream(backupDB).getChannel(); dst.transferFrom(src, 0, src.size()); src.close(); dst.close(); Toast.makeText(context, "Datenbank nach Downloads exportiert!", Toast.LENGTH_LONG).show(); } } catch (Exception e) { Log.e("Utils", e.getMessage()); Toast.makeText(context, "Exportieren fehlgeschlagen!", Toast.LENGTH_LONG).show(); } } }