Android Open Source - SpotifyTray-Android Utils

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From Project

Back to project page SpotifyTray-Android.

License

The source code is released under:

MIT License

Java Source Code

package com.droidprojects.spotifytray;
/*from   ww w  . j ava  2  s.  co m*/
import java.io.IOException;
import java.io.InputStream;

import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapRegionDecoder;
import android.graphics.Canvas;
import android.graphics.Path;
import android.graphics.Rect;

public class Utils {
  
  /**
   * Takes an inputstream, loads a bitmap optimized of space and then crops it for the view.
   * @param iStream Inputstream to the image.
   * @param containerHeight Height of the image holder container. 
   * @param containerWidth Width of the image holder container.
   * @return Cropped/masked bitmap.
   */
  public static Bitmap loadMaskedBitmap(InputStream iStream, int containerHeight, int containerWidth){
    
    // Load image data before loading the image itself.
    BitmapFactory.Options bmOptions = new BitmapFactory.Options();
    bmOptions.inJustDecodeBounds = true;
    
    BitmapFactory.decodeStream(iStream,null,bmOptions);
    
    int photoH = bmOptions.outHeight;
    int photoW = bmOptions.outWidth;
    
    // Find a suitable scalefactor to load the smaller bitmap, and then set the options.
    int scaleFactor = Math.min(photoH/containerHeight, photoW/containerHeight);
    bmOptions.inJustDecodeBounds = false;
    bmOptions.inSampleSize = scaleFactor;
    bmOptions.inPurgeable = true;

    // Load the square region out of the bitmap.
    Bitmap bmap=null;
    BitmapRegionDecoder decoder;
    try {
      iStream.reset();
      decoder = BitmapRegionDecoder.newInstance(iStream, false);
      bmap = decoder.decodeRegion(new Rect(0, 0, Math.min(photoH, photoW), Math.min(photoH, photoW)),bmOptions);
    } catch (IOException e) {
      e.printStackTrace();
    }
    
    // Calculate new width of the bitmap based on the width of the container
    int bitmapNewWidth = (bmap.getWidth()*containerWidth)/containerHeight;   
    
    // Produce clipping mask on the canvas and draw the bitmap 
    Bitmap targetBitmap = Bitmap.createBitmap(bitmapNewWidth, bmap.getHeight(), bmap.getConfig());
    Canvas canvas = new Canvas(targetBitmap);
    Path path = new Path();
    path.addCircle(bmap.getWidth() / 2, bmap.getHeight() / 2, bmap.getWidth() / 2, Path.Direction.CCW);
    canvas.clipPath(path);
    canvas.drawBitmap(bmap, 0, 0, null);

    // Retrieve the clipped bitmap and return
    return targetBitmap;
  }
  
  /**
   * Converts dps to pixels.
   * @param dp Value in dp.
   * @param res Resources reference to get the screen density.
   * @return Value in pixels.
   */
  public static int dpToPixels(int dp, Resources res){
    return (int)(res.getDisplayMetrics().density*dp + 0.5f);
  }
}

Java Source Code List

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