Support for stickers and scribbles

// FREEBIE

src/org/thoughtcrime/securesms/scribbles/StickerLoader.java

@@ -0,0 +1,56 @@
+/**
+ * Copyright (C) 2016 Open Whisper Systems
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.thoughtcrime.securesms.scribbles;
+
+
+import android.content.Context;
+import android.support.annotation.NonNull;
+import android.util.Log;
+
+import org.thoughtcrime.securesms.util.AsyncLoader;
+
+import java.io.IOException;
+
+class StickerLoader extends AsyncLoader<String[]> {
+
+  private static final String TAG = StickerLoader.class.getName();
+
+  private final String assetDirectory;
+
+  StickerLoader(Context context, String assetDirectory) {
+    super(context);
+    this.assetDirectory = assetDirectory;
+  }
+
+  @Override
+  public @NonNull
+  String[] loadInBackground() {
+    try {
+      String[] files = getContext().getAssets().list(assetDirectory);
+
+      for (int i=0;i<files.length;i++) {
+        files[i] = assetDirectory + "/" + files[i];
+      }
+
+      return files;
+    } catch (IOException e) {
+      Log.w(TAG, e);
+    }
+
+    return new String[0];
+  }
+}