Source link: https://github.com/florent37/DaVinci


DaVinci is an image downloading and caching library for Android Wear


Use DaVinci from your SmartWatch app


Into an imageview


Into a FragmentGridPagerAdapter

@Override public Drawable getBackgroundForRow(final int row) {

  return DaVinci.with(context).load("/image/" + row).into(this, row);

Into a CallBack

DaVinci.with(context).load("http://i.imgur.com/o3ELrbX.jpg").into(new DaVinci.Callback() {


 public void onBitmapLoaded(String path, Bitmap bitmap) {


By default, the asset name used for the bitmap is "image", you can modify this


Send Bitmaps

In your smartphone service

  public void onMessageReceived(MessageEvent messageEvent) {




Preload Bitmaps

Send image to wear


or with "/image/0" path


Image Transformation

You can specify custom transformations on your Bitmaps

public class ResizeTransformation implements Transformation {

  private int targetWidth;

public ResizeTransformation(int width) {

this.targetWidth = width;

  public Bitmap transform(Bitmap source) {

double aspectRatio = (double) source.getHeight() / (double) source.getWidth();

int targetHeight = (int) (targetWidth * aspectRatio);

Bitmap result = Bitmap.createScaledBitmap(source, targetWidth, targetHeight, false);

if (result != source) {

 // Same bitmap is returned if sizes are the same



return result;

  public String key() {

return "ResizeTransformation"+targetWidth;

Pass an instance of this class to the transform method

DaVinci.with(context).load(url).transform(new ResizeTransformation(300)).into(imageView);

Prodvided Transformations :


DaVinci.with(context).load(url).transform(new BlurTransformation()).into(imageView);


DaVinci.with(context).load(url).transform(new ResizeTransformation(maxWidth)).into(imageView);


In your wear module

compile ('com.github.florent37:davinci:1.0.3@aar'){

  transitive = true 

In your smartphone module

compile ('com.github.florent37:davincidaemon:1.0.3@aar'){

transitive = true 

Don't forget to add WRITE_EXTERNAL_STORAGE in your Wear AndroidManifest.xml

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>


  • Customize bitmap resizing (actually : width=300px)
  • Enabling multiples transformations
  • Apply transformations on Smartphone then send them to Wear


Looking for contributors, feel free to fork !


If you want to learn wear development : http://tutos-android-france.com/developper-une-application-pour-les-montres-android-wear/.




  • Bitmaps are now saved as PNG to preserve transparency


Author: Florent Champigny www.florentchampigny.com/

Pictures by Logan Bourgouin


Copyright 2015 florent37, Inc.  Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License. You may obtain a copy of the License at
  http://www.apache.org/licenses/LICENSE-2.0  Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. 


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