Java tutorial
//package com.java2s; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import android.content.Context; import android.graphics.Bitmap; public class Main { private static String storeImage(Context context, Bitmap bitmap) { ByteArrayOutputStream bytes = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.PNG, 100, bytes); File f = null; try { f = File.createTempFile("citationsImg", ".png", context.getExternalCacheDir()); FileOutputStream fo = new FileOutputStream(f); fo.write(bytes.toByteArray()); fo.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return f.getAbsolutePath(); } }