AssetCopy.java

package com.nutiteq.hellomap3.util;

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

import android.content.res.AssetManager;
import android.util.Log;

import com.nutiteq.advancedmap3.Const;

/**
 * A utility class for copying a bundled asset to a SDCard.
 */
public class AssetCopy {
	public static void copyAssetToSDCard(AssetManager assetManager, String fileName, String toDir) throws IOException {
		InputStream in = assetManager.open(fileName);
		File outFile = new File(toDir, fileName);
		// TODO jaak - check if storage is available and has enough space 
		if(outFile.exists()){
			Log.d(Const.LOG_TAG, "file already exits: "+outFile.getAbsolutePath());
			return;
		}

		OutputStream out = new FileOutputStream(outFile);
		copyFile(in, out);
		in.close();
		in = null;
		out.flush();
		out.close();
		out = null;
	}

	private static void copyFile(InputStream in, OutputStream out) throws IOException {
		byte[] buffer = new byte[1024];
		int read;
		while ((read = in.read(buffer)) != -1) {
			out.write(buffer, 0, read);
		}
	}
}