Added missing utils

android/src/main/java/com/fenger/package_manager/package_manager/utils/Base64Utils.java

@@ -0,0 +1,16 @@
+package com.fenger.package_manager.package_manager.utils;
+
+import android.graphics.Bitmap;
+import android.util.Base64;
+
+import java.io.ByteArrayOutputStream;
+
+public class Base64Utils {
+
+    public static String encodeToBase64(Bitmap image, Bitmap.CompressFormat compressFormat, int quality) {
+        ByteArrayOutputStream byteArrayOS = new ByteArrayOutputStream();
+        image.compress(compressFormat, quality, byteArrayOS);
+        return Base64.encodeToString(byteArrayOS.toByteArray(), Base64.NO_WRAP);
+    }
+
+}

android/src/main/java/com/fenger/package_manager/package_manager/utils/DrawableUtils.java

@@ -0,0 +1,22 @@
+package com.fenger.package_manager.package_manager.utils;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.drawable.Drawable;
+
+public class DrawableUtils {
+
+    public static Bitmap getBitmapFromDrawable(Drawable drawable) {
+        final Bitmap bmp = Bitmap.createBitmap(
+                drawable.getIntrinsicWidth(),
+                drawable.getIntrinsicHeight(),
+                Bitmap.Config.ARGB_8888);
+
+        final Canvas canvas = new Canvas(bmp);
+        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
+        drawable.draw(canvas);
+
+        return bmp;
+    }
+
+}