glide依赖:
implementation 'com.github.bumptech.glide:glide:4.6.1'
String url = "http://b.hiphotos.baidu.com/image/pic/item/dbb44aed2e738bd43212040dac8b87d6277ff9df.jpg";
RequestOptions optionsce = new RequestOptions()
.centerCrop();//突出中间
RequestOptions optionsf = new RequestOptions()
.fitCenter();//原型
RequestOptions optionsci = new RequestOptions()
.circleCrop();//圆形图片
RequestOptions options = new RequestOptions()
.override(200, 100);//指定尺寸
RequestOptions options2 = new RequestOptions()
.placeholder(R.drawable.ic_camera);//占位图
Glide.with(this)
.load(url)
.apply(options)//图片展示类型方法
.into(imageView);