Fresco支持的URIs

//远程图片
public void httpBtnOnClick(View view) {
    //网络图片URL
    String path = "http://p4.so.qhimg.com/t0102672bd8a6bd290e.jpg";
    imageView.setImageURI(Uri.parse(path));
}

//file本地SD卡图片加载
public void fileBtnOnClick(View view) {
    //File资源加载
    StringBuilder path = new StringBuilder("file://");
    path.append(Environment.getExternalStorageDirectory());
    path.append("/");
    String fileName = "image.png";
    path.append(fileName);
    imageView.setImageURI(Uri.parse(path.toString()));
}

//assets目录下的资源

public void assetsBtnOnClick(View view) {
    //assets资源加载
    StringBuilder path = new StringBuilder("asset:///");
    path.append("ic_launcher.png");
    imageView.setImageURI(Uri.parse(path.toString()));
}

//res目录下的资源
public void resBtnOnClick(View view) {
    //RES资源加载
    StringBuilder path = new StringBuilder("res://");
    //当前包名
    path.append(this.getPackageName());
    path.append("/");
    //资源ID
    path.append(String.valueOf(R.mipmap.a_0));//R.mipmap.a_0与R.drawable.a_0同样引用图片的资源ID
    imageView.setImageURI(Uri.parse(path.toString()));
}