Selecting Colors with the Palette API

DynamicPlaceHolder.java

// SetUp the Library 
android {
  compileSdkVersion 26
  ...
}

dependencies {
  ...
  implementation 'com.android.support:palette-v7:27.1.1'
}

//////CREATE A PALETTE

// Generate palette synchronously and return it
public Palette createPaletteSync(Bitmap bitmap) {
  Palette p = Palette.from(bitmap).generate();
  return p;
}

// Generate palette asynchronously and use it on a different
// thread using onGenerated()
public void createPaletteAsync(Bitmap bitmap) {
  Palette.from(bitmap).generate(new PaletteAsyncListener() {
    public void onGenerated(Palette p) {
      // Use generated instance
    }
  });
}


//// Use swatches to create color schemes
Palette.Swatch vibrant = myPalette.getVibrantSwatch();
if(vibrant != null){
    int titleColor = vibrant.getTitleTextColor();
    // ...
}

// The following snippet of code uses the methods from the above code snippets
//to synchronously generate a palette, get its vibrant swatch, 
//and change the colors of a toolbar to match the bitmap image

// Set the background and text colors of a toolbar given a
// bitmap image to match
public void setToolbarColor(Bitmap bitmap) {
    // Generate the palette and get the vibrant swatch
    // See the createPaletteSync() method
    // from the code snippet above
    Palette p = createPaletteSync(bitmap);
    Palette.Swatch vibrantSwatch = p.getVibrantSwatch();

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

    // Load default colors
    int backgroundColor = ContextCompat.getColor(getContext(),
        R.color.default_title_background);
    int textColor = ContextCompat.getColor(getContext(),
        R.color.default_title_color);

    // Check that the Vibrant swatch is available
    if(vibrantSwatch != null){
        backgroundColor = vibrantSwatch.getRgb();
        textColor = vibrantSwatch.getTitleTextColor();
    }

    // Set the toolbar background and text colors
    toolbar.setBackgroundColor(backgroundColor);
        toolbar.setTitleTextColor(textColor);
}