create Icon Thumbnail, Scaled Image : Icon « 2D Graphics « Android

1. Android
2. 2D Graphics
3. Icon

create Icon Thumbnail, Scaled Image

 
/*
  Copyright (C) 2010 Jorge Rowies
  This is a modified version of GroupHome, by Jeffrey Sharkey. 
  See http://jsharkey.org/blog/2008/12/15/grouphome-organize-your-android-apps-into-groups/ 
  
  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
  
  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

//package org.jrowies.apcat;

import java.io.ByteArrayOutputStream;
import java.util.List;

import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.graphics.Bitmap.CompressFormat;
import android.graphics.Canvas;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.widget.Toast;

public class Utilities
{
  public static void popUp(Context context, String message)
  {
    Toast t = Toast.makeText(context, message, Toast.LENGTH_LONG);
    t.show();
  }

  public static List<ResolveInfo> getResolveInfoList(PackageManager pm)
  {
    Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
    mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
    return pm.queryIntentActivities(mainIntent, 0);
  }

  public static Drawable createIconThumbnail(Drawable icon, int size)
  {
    // code adapted from packages/apps/Launcher

    int sourceWidth = icon.getIntrinsicWidth(), sourceHeight = icon
        .getIntrinsicHeight();

    int destWidth = size, destHeight = size;

    // only resize if actually needed
    if (sourceWidth != destWidth || sourceHeight != destHeight)
    {
      float ratio = (float) sourceWidth / sourceHeight;
      if (sourceWidth > sourceHeight)
      {
        destHeight = (int) (destWidth / ratio);
      }
      else if (sourceHeight > sourceWidth)
      {
        destWidth = (int) (destHeight * ratio);
      }

      final Bitmap thumb = Bitmap.createBitmap(size, size,
          Bitmap.Config.ARGB_8888);
      final Canvas canvas = new Canvas(thumb);

      icon.setBounds((size - destWidth) / 2, (size - destHeight) / 2,
          destWidth, destHeight);
      icon.draw(canvas);
      icon = new BitmapDrawable(thumb);

    }

    return icon;
  }
  
  public static byte[] drawableToBytes(Drawable image, int imageSize)
  {
    Bitmap imageBitmap = ((BitmapDrawable)image).getBitmap();
    return convertToByteArray(imageBitmap, imageSize);
  }
  
  public static Drawable getResolveInfoIcon(ResolveInfo info, PackageManager pm)
  {
    return info.activityInfo.loadIcon(pm);
  }
  
  public static CharSequence getResolveInfoTitle(ResolveInfo info, PackageManager pm)
  {
    CharSequence result = info.loadLabel(pm);
    if (result == null)
      result = info.activityInfo.name;
    return result;
  }
  
  public static String getResolveInfoFullName(ResolveInfo info)
  {
    return info.activityInfo.name;
  }

  public static String getResolveInfoPackageName(ResolveInfo info)
  {
    return info.activityInfo.applicationInfo.packageName;
  }
  
  //This code adapted from AppsOrganizer
  //http://code.google.com/p/appsorganizer/source/browse/trunk/AppsOrganizer/src/com/google/code/appsorganizer/chooseicon/SelectAppDialog.java
  public static byte[] convertToByteArray(Bitmap bm, int imageSize) 
  {
    Bitmap bitmap = getScaledImage(bm, imageSize);
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    bitmap.compress(CompressFormat.PNG, 100, os);
    return os.toByteArray();
  }

  //This code adapted from AppsOrganizer
  //http://code.google.com/p/appsorganizer/source/browse/trunk/AppsOrganizer/src/com/google/code/appsorganizer/chooseicon/SelectAppDialog.java
  private static Bitmap getScaledImage(Bitmap bitmap, int size) 
  {
    int width = bitmap.getWidth();
    int height = bitmap.getHeight();

    if ((size == width) && (size == height))
      return bitmap;
    
    float coefWidth = ((float) size) / width;
    float coefHeight = ((float) size) / height;

    Matrix matrix = new Matrix();
    matrix.postScale(coefWidth, coefHeight);

    return Bitmap.createBitmap(bitmap, 0, 0, width, height, matrix, true);
  }
}

   
  

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