第一种方法转载自:android ImageView网络图片加载、动态设置尺寸、圆角.. - L-H - 博客园
package com.example.hangliao.oneyuanrecharge.helper; import android.graphics.Bitmap; import android.graphics.Bitmap.Config; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.PorterDuff.Mode; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.RectF; import android.os.Handler; import android.os.Message; import android.widget.ImageView; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; public class ImageViewLoadAndSetSizeAndCircle { private PicHandler pic_hdl; private ImageView imgView; private String url; private int widht; private int height; private int CircleSize; public void setImage(ImageView imgView, String url,int widht,int height,int CircleSize) { this.url = url; this.imgView = imgView; this.widht=widht; this.height=height; this.CircleSize=CircleSize; pic_hdl = new PicHandler(); Thread t = new LoadPicThread(); t.start(); } class LoadPicThread extends Thread { @Override public void run() { Bitmap img = getUrlImage(url); System.out.println(img + "---"); Message msg = pic_hdl.obtainMessage(); msg.what = 0; msg.obj = img; pic_hdl.sendMessage(msg); } } class PicHandler extends Handler { @Override public void handleMessage(Message msg) { Bitmap myimg = (Bitmap) msg.obj; imgView.setImageBitmap(myimg); } } public Bitmap getUrlImage(String url) { Bitmap img = null; try { URL picurl = new URL(url); HttpURLConnection conn = (HttpURLConnection) picurl .openConnection(); conn.setConnectTimeout(6000); conn.setDoInput(true); conn.setUseCaches(false); conn.connect(); InputStream is = conn.getInputStream(); img = BitmapFactory.decodeStream(is); is.close(); } catch (Exception e) { e.printStackTrace(); } img=zoomImage(img,this.widht,this.height); return img; } public Bitmap zoomImage(Bitmap bgimage, double newWidth, double newHeight) { // 获取这个图片的宽和高 float width = bgimage.getWidth(); float height = bgimage.getHeight(); // 创建 *** 作图片用的matrix对象 Matrix matrix = new Matrix(); // 计算宽高缩放率 float scaleWidth = ((float) newWidth) / width; float scaleHeight = ((float) newHeight) / height; // 缩放图片动作 matrix.postScale(scaleWidth, scaleHeight); Bitmap bitmap = Bitmap.createBitmap(bgimage, 0, 0, (int) width, (int) height, matrix, true); if (CircleSize>0) //需要圆角 { bitmap=bitmapRound(bitmap,CircleSize); } else //不需要圆角 { } return bitmap; } private Bitmap bitmapRound(Bitmap mBitmap,float CircleSize){ Bitmap bitmap = Bitmap.createBitmap(mBitmap.getWidth(), mBitmap.getHeight(), Config.ARGB_4444); Canvas canvas = new Canvas(bitmap); Paint paint = new Paint(); paint.setAntiAlias(true); //设置矩形大小 Rect rect = new Rect(0,0,mBitmap.getWidth(),mBitmap.getHeight()); RectF rectf = new RectF(rect); // 相当于清屏 canvas.drawARGB(0, 0, 0, 0); //画圆角 canvas.drawRoundRect(rectf, CircleSize, CircleSize, paint); // 取两层绘制,显示上层 paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); // 把原生的图片放到这个画布上,使之带有画布的效果 canvas.drawBitmap(mBitmap, rect, rect, paint); return bitmap; } }
使用方法:
ImageView headerImage = ( ImageView ) convertView.findViewById(R.id.headerImage); new ImageViewLoadAndSetSizeAndCircle().setImage(headerImage,"http://www.taopic.com/uploads/allimg/110928/41-11092PSF482.jpg",70,70,35);
第二种方式 简单直接粗暴
使用glide的override改变图片尺寸
另外高斯模糊不可以和glide的centerCrop属性一起使用
private void gaosimohu() { int height= ScreenUtils.getScreenHeight(); Glide.with(this).load(headIconUri) .apply(RequestOptions.bitmapTransform(new jp.wasabeef.glide.transformations.BlurTransformation(1, 30))) //高斯模糊 .override(height,height) //指定宽高 .into(placeholderView); }
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