github：https://github.com/square/picasso

引入依賴：

compile 'com.squareup.picasso:picasso:2.5.2'

public class usePicasso extends AppCompatActivity {
    ImageView imageView;
    @Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_use_picasso
 
);
        imageView=(ImageView)findViewById(R.id.imagepicasso);
        Picasso.with(this).load("http://img2.imgtn.bdimg.com/it/u=395920684,863299018&fm=21&gp=0.jpg").into(imageView);
    }
}