BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeResource(getResources(), R.row.images01, options);
int iWidth = options.outWidth;
int iHeight = options.outHeight;


=====================================================================

/** Get Bitmap's Width **/
 public static int getBitmapOfWidth( String fileName ){
    try {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(fileName, options);
        return options.outWidth;
    } catch(Exception e) {
    return 0;
    }
 }
 
 /** Get Bitmap's height **/
 public static int getBitmapOfHeight( String fileName ){
  
    try {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(fileName, options);
  
        return options.outHeight;
    } catch(Exception e) {
        return 0;
   }
 }

=============================================================
private static final int MAX_IMAGE_SIZE = 172;

/**
 *  This Function takes some time.
 *  Don't Call it in UI Thread.
 */
public static Bitmap bitmapFromUrl (String imageURL){
try {
byte[] datas = getImageDataFromUrl( new URL(imageURL) );

// CHECK IMAGE SIZE BEFORE LOAD
int scale = 1;
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inJustDecodeBounds = true;
BitmapFactory.decodeByteArray(datas, 0, datas.length, opts);

// IF IMAGE IS BIGGER THAN MAX, DOWN SAMPLING
if (opts.outHeight > MAX_IMAGE_SIZE || opts.outWidth > MAX_IMAGE_SIZE) {
scale = (int)Math.pow(2, (int)Math.round(Math.log(MAX_IMAGE_SIZE/(double)Math.max(opts.outHeight, opts.outWidth)) / Math.log(0.5)));
}
       opts.inJustDecodeBounds = false;
       opts.inSampleSize = scale;

return BitmapFactory.decodeByteArray(datas, 0, datas.length, opts);
} catch (IOException e) {
return null;
}
}

public static byte[] getImageDataFromUrl (URL url) {
byte[] datas = {};

try {
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
connection.setDoInput(true);
connection.connect();

InputStream input = connection.getInputStream();
datas = IOUtils.toByteArray(input);

input.close();
connection.disconnect();
} catch (IOException e) {
}

return datas;
}


=================================================================

이 게시물을