Picasso是安卓加载，下载图片的强有力工具

1.首先在，build.gradule(Module)里添加

dependencies { compile 'com.squareup.picasso:picasso:2.5.2' }

2.再同步

3.基本使用方式：

1）改变图片的大小，减少内存占用

Picasso.with(context) .load(url) .resize(50, 50) .centerCrop() .into(imageView) 2）图片下载

Picasso.with(context) .load(url) .placeholder(R.drawable.user_placeholder) .error(R.drawable.user_placeholder_error) .into(imageView); 3）加载drawable资源到imageview

Picasso.with(context).load(R.drawable.landing_screen).into(imageView1); 4）加载本地资源（传入路径）到imageview

Picasso.with(context).load("file:///android_asset/DvpvklR.png").into(imageView2); 5）加载本地资源（传入文件）到imageview

Picasso.with(context).load(new File(...)).into(imageView3); 6) 

How to load video thumbnails using square picasso library?