Rotate Bitmap : Bitmap « 2D Graphics « Android






  1. Android
  2. 2D Graphics
  3. Bitmap

Rotate Bitmap

    
//package com.gaara.test.utils;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;

class GraphicsUtils {

  public static void rotateBitmap(Canvas canvas,Bitmap bitmap,float angle,int alpha,float scale) {
/*    Matrix matrix = new Matrix();
    matrix.setScale(4, 4);
    Bitmap resizeBmp = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(),matrix, true);

    matrix = new Matrix();
    matrix.setTranslate(resizeBmp.getWidth()/2,resizeBmp.getHeight()/2);
    matrix.preRotate(angle);

    matrix.preTranslate(-resizeBmp.getWidth()/2,-resizeBmp.getHeight()/2);
    matrix.postTranslate((canvas.getWidth()-resizeBmp.getWidth())/2,(canvas.getHeight()-resizeBmp.getHeight())/2);

    Paint vPaint = new Paint();
        vPaint.setStyle( Paint.Style.STROKE );   //???
        vPaint.setAlpha(alpha);   // Bitmap?????0 ~ 100)
    canvas.drawBitmap(resizeBmp,matrix,vPaint);*/
    
    Bitmap resizeBmp = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth()/2, bitmap.getHeight()/2);
    canvas.drawBitmap(resizeBmp, 0,0,null);
  }
}








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