create Icon Thumbnail : Icon « 2D Graphics « Android

1. Android
2. 2D Graphics
3. Icon

create Icon Thumbnail

 
/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.jsharkey.grouphome;

import android.graphics.drawable.Drawable;
import android.graphics.drawable.PaintDrawable;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.Bitmap;
import android.graphics.PixelFormat;
import android.graphics.Canvas;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.Paint;
import android.graphics.Rect;
import android.content.res.Resources;
import android.content.Context;

 class Utilities {

  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;
  }
}

   
  

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