package com.quark.utils;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
/**
* Created by Administrator on 11/1 0001.
*/
public class BitmapTools {
public static Bitmap scaleBitmap(Bitmap bitmap, int vwidth, int vheight) {
int bwidth = bitmap.getWidth();
int bheight = bitmap.getHeight();
//x需要放大的倍数 view 的 width
float scalex = (float) vwidth / bwidth;
//y需要放大的倍数
float scaley = (float) vheight / bheight;
//取大的倍数， 保证视图被填充
float scale = Math.max(scalex, scaley) * 1.1f;
Bitmap.Config config = Bitmap.Config.ARGB_8888;
Bitmap bg = Bitmap.createBitmap(vwidth, vheight, config);
Canvas c = new Canvas(bg);
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setFilterBitmap(true);
Matrix matrix = new Matrix();
// resize the Bitmap
matrix.postScale(scale, scale);
c.drawBitmap(bitmap, matrix, paint);
return bg;
}
}