Support for stickers and scribbles

// FREEBIE

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

@@ -0,0 +1,163 @@
+/**
+ * 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.net.Uri;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.v4.app.Fragment;
+import android.support.v4.app.LoaderManager;
+import android.support.v4.content.Loader;
+import android.support.v7.widget.GridLayoutManager;
+import android.support.v7.widget.RecyclerView;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+
+import com.bumptech.glide.Glide;
+import com.bumptech.glide.load.engine.DiskCacheStrategy;
+
+import org.thoughtcrime.securesms.R;
+
+public class StickerSelectFragment extends Fragment implements LoaderManager.LoaderCallbacks<String[]> {
+
+  private RecyclerView recyclerView;
+  private String assetDirectory;
+  private StickerSelectionListener listener;
+
+  public static StickerSelectFragment newInstance(String assetDirectory) {
+    StickerSelectFragment fragment = new StickerSelectFragment();
+
+    Bundle args = new Bundle();
+    args.putString("assetDirectory", assetDirectory);
+    fragment.setArguments(args);
+
+    return fragment;
+  }
+
+  @Nullable
+  public View onCreateView(LayoutInflater inflater,
+                           @Nullable ViewGroup container,
+                           @Nullable Bundle savedInstanceState)
+  {
+    View view = inflater.inflate(R.layout.scribble_select_sticker_fragment, container, false);
+    this.recyclerView = (RecyclerView)view.findViewById(R.id.stickers_recycler_view);
+
+    return view;
+  }
+
+  @Override
+  public void onActivityCreated(Bundle bundle) {
+    super.onActivityCreated(bundle);
+
+    this.assetDirectory = getArguments().getString("assetDirectory");
+
+    getLoaderManager().initLoader(0, null, this);
+    this.recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 3));
+  }
+
+  @Override
+  public Loader<String[]> onCreateLoader(int id, Bundle args) {
+    return new StickerLoader(getActivity(), assetDirectory);
+  }
+
+  @Override
+  public void onLoadFinished(Loader<String[]> loader, String[] data) {
+    recyclerView.setAdapter(new StickersAdapter(getActivity(), data));
+  }
+
+  @Override
+  public void onLoaderReset(Loader<String[]> loader) {
+    recyclerView.setAdapter(null);
+  }
+
+  public void setListener(StickerSelectionListener listener) {
+    this.listener = listener;
+  }
+
+  class StickersAdapter extends RecyclerView.Adapter<StickersAdapter.StickerViewHolder> {
+
+    private final Context context;
+    private final String[]       stickerFiles;
+    private final LayoutInflater layoutInflater;
+
+    StickersAdapter(@NonNull Context context, @NonNull String[] stickerFiles) {
+      this.context        = context;
+      this.stickerFiles   = stickerFiles;
+      this.layoutInflater = LayoutInflater.from(context);
+    }
+
+    @Override
+    public StickerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+      return new StickerViewHolder(layoutInflater.inflate(R.layout.scribble_sticker_item, parent, false));
+    }
+
+    @Override
+    public void onBindViewHolder(StickerViewHolder holder, int position) {
+      holder.fileName = stickerFiles[position];
+
+      Glide.with(context)
+           .load(Uri.parse("file:///android_asset/" + holder.fileName))
+           .diskCacheStrategy(DiskCacheStrategy.NONE)
+           .into(holder.image);
+    }
+
+    @Override
+    public int getItemCount() {
+      return stickerFiles.length;
+    }
+
+    @Override
+    public void onViewRecycled(StickerViewHolder holder) {
+      super.onViewRecycled(holder);
+      Glide.clear(holder.image);
+    }
+
+    private void onStickerSelected(String fileName) {
+      if (listener != null) listener.onStickerSelected(fileName);
+    }
+
+    class StickerViewHolder extends RecyclerView.ViewHolder {
+
+      private String fileName;
+      private ImageView image;
+
+      StickerViewHolder(View itemView) {
+        super(itemView);
+        image = (ImageView) itemView.findViewById(R.id.sticker_image);
+        itemView.setOnClickListener(new View.OnClickListener() {
+          @Override
+          public void onClick(View view) {
+            int pos = getAdapterPosition();
+            if (pos >= 0) {
+              onStickerSelected(fileName);
+            }
+          }
+        });
+      }
+    }
+  }
+
+  public interface StickerSelectionListener {
+    public void onStickerSelected(String name);
+  }
+
+
+}