Example usage for android.graphics.drawable LayerDrawable setDither

Introduction

In this page you can find the example usage for android.graphics.drawable LayerDrawable setDither.

Prototype

@Override
    public void setDither(boolean dither) 

Source Link

Usage

From source file:com.eleybourn.bookcatalogue.utils.Utils.java

/**
  * Reuse of bitmaps in tiled backgrounds is a known cause of problems:
  *      http://stackoverflow.com/questions/4077487/background-image-not-repeating-in-android-layout
 * So we avoid reusing them./* w  w w  .  j  av a2  s  .co  m*/
 * 
 * This seems to have become further messed up in 4.1 so now, we just created them manually. No references,
 * but the old cleanup method (see below for cleanupTiledBackground()) no longer works. Since it effectively
 * un-cached the background, we just create it here.
 * 
 * The main problem with this approach is that the style is defined in code rather than XML.
 *
 * @param a         Activity context
 * @param bright   Flag indicating if background should be 'bright'
 * 
 * @return         Background Drawable
 */
public static Drawable makeTiledBackground(boolean bright) {
    // Storage for the layers
    Drawable[] drawables = new Drawable[2];
    // Get the BG image, put in tiled drawable
    Bitmap b = BitmapFactory.decodeResource(BookCatalogueApp.context.getResources(), R.drawable.books_bg);
    BitmapDrawable bmD = new BitmapDrawable(BookCatalogueApp.context.getResources(), b);
    bmD.setTileModeXY(TileMode.REPEAT, TileMode.REPEAT);
    // Add to layers
    drawables[0] = bmD;

    // Set up the gradient colours based on 'bright' setting
    int[] colours = new int[3];
    if (bright) {
        colours[0] = Color.argb(224, 0, 0, 0);
        colours[1] = Color.argb(208, 0, 0, 0);
        colours[2] = Color.argb(48, 0, 0, 0);
    } else {
        colours[0] = Color.argb(255, 0, 0, 0);
        colours[1] = Color.argb(208, 0, 0, 0);
        colours[2] = Color.argb(160, 0, 0, 0);
    }

    // Create a gradient and add to layers
    GradientDrawable gd = new GradientDrawable(GradientDrawable.Orientation.LEFT_RIGHT, colours);
    drawables[1] = gd;

    // Make the layers and we are done.
    LayerDrawable ll = new LayerDrawable(drawables);
    ll.setDither(true);

    return ll;
}

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