private static Bitmap transform(Matrix scaler,Bitmap source,int targetWidth,int targetHeight,int options){
  Log.i(TAG,"transform --1--");
  boolean scaleUp=(options & 0x1) != 0;
  boolean recycle=(options & 0x2) != 0;
  int deltaX=source.getWidth() - targetWidth;
  int deltaY=source.getHeight() - targetHeight;
  if (!scaleUp && (deltaX < 0 || deltaY < 0)) {
    Log.i(TAG,"transform --2--");
    Bitmap b2=Bitmap.createBitmap(targetWidth,targetHeight,Bitmap.Config.ARGB_8888);
    Canvas c=new Canvas(b2);
    int deltaXHalf=Math.max(0,deltaX / 2);
    int deltaYHalf=Math.max(0,deltaY / 2);
    Rect src=new Rect(deltaXHalf,deltaYHalf,deltaXHalf + Math.min(targetWidth,source.getWidth()),deltaYHalf + Math.min(targetHeight,source.getHeight()));
    int dstX=(targetWidth - src.width()) / 2;
    int dstY=(targetHeight - src.height()) / 2;
    Rect dst=new Rect(dstX,dstY,targetWidth - dstX,targetHeight - dstY);
    c.drawBitmap(source,src,dst,null);
    if (recycle) {
      source.recycle();
    }
    c.setBitmap(null);
    Log.i(TAG,"transform --3--");
    return b2;
  }
  float bitmapWidthF=source.getWidth();
  float bitmapHeightF=source.getHeight();
  Log.i(TAG,"bitmapWidthF:" + bitmapWidthF + ",bitmapHeightF:"+ bitmapHeightF);
  float bitmapAspect=bitmapWidthF / bitmapHeightF;
  float viewAspect=(float)targetWidth / targetHeight;
  Log.i(TAG,"targetWidth:" + targetWidth + ",targetHeight:"+ targetHeight);
  if (bitmapAspect > viewAspect) {
    float scale=targetHeight / bitmapHeightF;
    if (scale < .9F || scale > 1F) {
      scaler.setScale(scale,scale);
    }
 else {
      scaler=null;
    }
  }
 else {
    float scale=targetWidth / bitmapWidthF;
    if (scale < .9F || scale > 1F) {
      scaler.setScale(scale,scale);
    }
 else {
      scaler=null;
    }
  }
  Bitmap b1;
  if (scaler != null) {
    Log.i(TAG,"transform --3.1--");
    b1=Bitmap.createBitmap(source,0,0,source.getWidth(),source.getHeight(),scaler,true);
  }
 else {
    Log.i(TAG,"transform --3.2--");
    b1=source;
  }
  if (recycle && b1 != source) {
    Log.i(TAG,"transform --4--");
    source.recycle();
  }
  int dx1=Math.max(0,b1.getWidth() - targetWidth);
  int dy1=Math.max(0,b1.getHeight() - targetHeight);
  Bitmap b2=Bitmap.createBitmap(b1,dx1 / 2,dy1 / 2,targetWidth,targetHeight);
  if (b2 != b1) {
    if (recycle || b1 != source) {
      Log.i(TAG,"transform --5--");
      b1.recycle();
    }
  }
  Log.i(TAG,"transform --6--");
  if (b2 == null) {
    Log.i(TAG,"transform --7--");
  }
  return b2;
}

private static Bitmap transform ( Matrix scaler , Bitmap source , int targetWidth , int targetHeight , int options ) { Log . i ( TAG , "transform --1--" ) ; boolean scaleUp = ( options & 0x1 ) != 0 ; boolean recycle = ( options & 0x2 ) != 0 ; int deltaX = source . getWidth ( ) - targetWidth ; int deltaY = source . getHeight ( ) - targetHeight ; if ( ! scaleUp && ( deltaX < 0 || deltaY < 0 ) ) { Log . i ( TAG , "transform --2--" ) ; Bitmap b2 = Bitmap . createBitmap ( targetWidth , targetHeight , Bitmap . Config . ARGB_8888 ) ; Canvas c = new Canvas ( b2 ) ; int deltaXHalf = Math . max ( 0 , deltaX / 2 ) ; int deltaYHalf = Math . max ( 0 , deltaY / 2 ) ; Rect src = new Rect ( deltaXHalf , deltaYHalf , deltaXHalf + Math . min ( targetWidth , source . getWidth ( ) ) , deltaYHalf + Math . min ( targetHeight , source . getHeight ( ) ) ) ; int dstX = ( targetWidth - src . width ( ) ) / 2 ; int dstY = ( targetHeight - src . height ( ) ) / 2 ; Rect dst = new Rect ( dstX , dstY , targetWidth - dstX , targetHeight - dstY ) ; c . drawBitmap ( source , src , dst , null ) ; if ( recycle ) { source . recycle ( ) ; } c . setBitmap ( null ) ; Log . i ( TAG , "transform --3--" ) ; return b2 ; } float bitmapWidthF = source . getWidth ( ) ; float bitmapHeightF = source . getHeight ( ) ; Log . i ( TAG , "bitmapWidthF:" + bitmapWidthF + ",bitmapHeightF:" + bitmapHeightF ) ; float bitmapAspect = bitmapWidthF / bitmapHeightF ; float viewAspect = ( float ) targetWidth / targetHeight ; Log . i ( TAG , "targetWidth:" + targetWidth + ",targetHeight:" + targetHeight ) ; if ( bitmapAspect > viewAspect ) { float scale = targetHeight / bitmapHeightF ; if ( scale < .9F || scale > 1F ) { scaler . setScale ( scale , scale ) ; } else { scaler = null ; } } else { float scale = targetWidth / bitmapWidthF ; if ( scale < .9F || scale > 1F ) { scaler . setScale ( scale , scale ) ; } else { scaler = null ; } } Bitmap b1 ; if ( scaler != null ) { Log . i ( TAG , "transform --3.1--" ) ; b1 = Bitmap . createBitmap ( source , 0 , 0 , source . getWidth ( ) , source . getHeight ( ) , scaler , true ) ; } else { Log . i ( TAG , "transform --3.2--" ) ; b1 = source ; } if ( recycle && b1 != source ) { Log . i ( TAG , "transform --4--" ) ; source . recycle ( ) ; } int dx1 = Math . max ( 0 , b1 . getWidth ( ) - targetWidth ) ; int dy1 = Math . max ( 0 , b1 . getHeight ( ) - targetHeight ) ; Bitmap b2 = Bitmap . createBitmap ( b1 , dx1 / 2 , dy1 / 2 , targetWidth , targetHeight ) ; if ( b2 != b1 ) { if ( recycle || b1 != source ) { Log . i ( TAG , "transform --5--" ) ; b1 . recycle ( ) ; } } Log . i ( TAG , "transform --6--" ) ; if ( b2 == null ) { Log . i ( TAG , "transform --7--" ) ; } return b2 ; }
transform source bitmap to targeted width and height
