图片转bitmap

来源：互联网发布：mac pro快捷键编辑：程序博客网时间：2024/05/01 13:53

1、方法一：

Bitmap bm=BitmapFactory.decodeResource(getResources(), R.drawable.img);

2、方法二:

Bitmap bm=ImageUtil.drawableToBitmap(getResources().getDrawable(R.drawable.img));

工具类ImageUtil：

package com.cd.imagedemo;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.PixelFormat;
import android.graphics.drawable.Drawable;

public class ImageUtil {

   /**
   * 图片转成Bitmap
   *
   * @param drawable
   * @return
   */
   public static Bitmap drawableToBitmap(Drawable drawable) {

       Bitmap bitmap = Bitmap.createBitmap(

       drawable.getIntrinsicWidth(),

       drawable.getIntrinsicHeight(),

       drawable.getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
               : Bitmap.Config.RGB_565);

       Canvas canvas = new Canvas(bitmap);

       // canvas.setBitmap(bitmap);

       drawable.setBounds(0, 0, drawable.getIntrinsicWidth(),drawable.getIntrinsicHeight());

       drawable.draw(canvas);

       return bitmap;

   }
}

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