title: Palette (Android Support v22) doesn't generate Swatches
body: <p>First of all, I never used Palette, when i wanted to start with it, I see that all tutorials and blogs talk about v21 and not v22.</p>
  
  <p>My problem is that I have a Swatch (In position 0 of swatch's array [palette.getSwatches().get(0)]) that returns always black (title and body), here is an example as I'm using this, maybe it's wrong but I'm copying this <a href="https://developer.android.com/reference/android/support/v7/graphics/Palette.html" rel="nofollow">https://developer.android.com/reference/android/support/v7/graphics/Palette.html</a> </p>
  
  <pre><code>        Palette.from(BitmapFactory.decodeResource(getResources(),R.drawable.prueba2)).generate(new Palette.PaletteAsyncListener() {
          @Override
          public void onGenerated(Palette palette) {
              text.setTextColor(palette.getVibrantSwatch().getBodyTextColor());
              text.setBackgroundColor(palette.getVibrantSwatch().getTitleTextColor());
          }
      });
  </code></pre>
  
  <p>When I start this App (I have an activity with a textView and an ImageView) it closes saying this</p>
  
  <pre><code> Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int android.support.v7.graphics.Palette$Swatch.getBodyTextColor()' on a null object reference
          at com.alfondo.projectpalette.MainActivity.onCreate(MainActivity.java:33)"
  </code></pre>
  
  <p>EDIT: This is my drawable. (I cant't post imgs) <a href="http://imgur.com/YGV9xVS" rel="nofollow">http://imgur.com/YGV9xVS</a></p>