Android Open Source - wiki-contacts-android Image Service Impl

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License

The source code is released under:

Apache License

Java Source Code

package com.kahkong.wikicontacts.service;
/*from w ww . j  a  v a  2 s  . com*/
import java.io.ByteArrayOutputStream;

import java.io.IOException;
import java.io.InputStream;
import com.kahkong.wikicontacts.callback.OnCompleteListener;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;

/**
 * 
 * @author Poh Kah Kong
 *
 */
public class ImageServiceImpl implements ImageService {
  private static ImageService instance;
  
  private WebService webService = WebServiceImpl.getInstance();
  private ResourceService resourceService = ResourceServiceImpl.getInstance();
  
  private ImageServiceImpl() {
  }

  public synchronized static ImageService getInstance() {
    if (instance==null) {
      instance = new ImageServiceImpl();
    }
    return instance;
  }
  
  public void getImage(boolean isSpam, String url, final OnCompleteListener onCompleteListener) {
    if (isSpam) { // is spam
      onCompleteListener.onComplete(new Object[] {resourceService.getSpamImage()});
    } else { // not spam
      if (url!=null) { // has image        
        webService.getImageApp(url, new OnCompleteListener() {
          @Override
          public void onComplete(Object[] objects) {
            onCompleteListener.onComplete(new Object[] {decodeImage((InputStream) objects[0])});
          }
        });
      } else { // no image
        onCompleteListener.onComplete(new Object[] {resourceService.getNewImage()});
      }
    }
  }
  
  public Bitmap processImage(InputStream inputStream, int size) {
    Bitmap image = decodeImage(inputStream);
    image = resizeImage(image, size);
    image = cropCenterImage(image);
    return image;
  }  
  
  private Bitmap decodeImage(InputStream inputStream) {
    if (inputStream==null) {
      return null;
    }    
    Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
    try {
      inputStream.close();
    } catch (IOException e) {
      e.printStackTrace();
    }
    return bitmap;
  }
  
  private Bitmap cropCenterImage(Bitmap image) {
    int width = image.getWidth();
    int height = image.getHeight();
    int size, x, y;
    if (width>height) { // landscape
      size = height;
      x = (width-height)/2;
      y = 0;
    } else { // portrait
      size = width;
      x = 0;
      y = (height-width)/2;
    }    
    Bitmap image2 = Bitmap.createBitmap(image, x, y, size, size);
    image.recycle();
    return image2;
  }
  
  private Bitmap resizeImage(Bitmap image, int size){
    int width = image.getWidth();
    int height = image.getHeight();
    int width2, height2;
    if (width>height) { // landscape
      width2 = (int) (((double) width)/height*size);
      height2 = size;
    } else { // portrait
      width2 = size;
      height2 = (int) (((double) height)/width*size);      
    }
    Bitmap image2 = Bitmap.createScaledBitmap(image, width2, height2, false); 
    image.recycle();
      return image2;
  }
  
  public Bitmap rotateImage(Bitmap image) {
    Matrix matrix = new Matrix();
    matrix.setRotate(90);
    Bitmap image2 = Bitmap.createBitmap(image, 0, 0, image.getWidth(), image.getHeight(), matrix, false);
    image.recycle();
    return image2;
  }
  
  public byte[] bitmapToBytes(Bitmap image) {
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); 
    image.compress(CompressFormat.PNG, 100, outputStream); 
    return outputStream.toByteArray();
  }
}

Java Source Code List

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