fresco(图片加载框架)

Gradle：

  compile group: 'com.facebook.fresco', name: 'fresco', version: '1.0.0'

布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:fresco="http://schemas.android.com/apk/res-auto"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.zhad20170119.MainActivity">

    <com.facebook.drawee.view.SimpleDraweeView
        android:id="@+id/imga"
        android:layout_width="200dp"
        android:layout_height="200dp"
        fresco:placeholderImage="@mipmap/ic_launcher"
    />
</RelativeLayout>

MainActivity.java:

public class MainActivity extends AppCompatActivity {


    @BindView(R.id.imga)
    SimpleDraweeView imga;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //初始化放在setContentView之前
        Fresco.initialize(this);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);

        Uri uri = Uri.parse("https://pic.cnblogs.com/avatar/1065841/20161118114622.png");
        SimpleDraweeView draweeView = imga;
        draweeView.setImageURI(uri);

    }
}