Android中 Fresco的简单使用

网络请求加载图片需要网络权限:

<uses-permission android:name="android.permission.INTERNET"/>

需要导入依赖:

compile 'com.facebook.fresco:fresco:1.3.0'

Android中 Fresco的简单使用

-------------------MainActivity-------------------------

package com.example.earl.fresco;

import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import com.facebook.drawee.backends.pipeline.Fresco;
import com.facebook.drawee.interfaces.DraweeController;
import com.facebook.drawee.view.SimpleDraweeView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //Fresco的初始化，必须调用在setContentView之前
        Fresco.initialize(this);
        setContentView(R.layout.activity_main);

        initView();
    }

    private void initView() {

        //创建SimpleDraweeView对象
        SimpleDraweeView simpleDraweeView = findViewById(R.id.main_sdv);
        //创建将要下载图片的url
        Uri imgUri = Uri.parse("http://img2.imgtn.bdimg.com/it/u=3861985703,4203210535/&fm=27&gp=0.jpg");
        //开始下载
        simpleDraweeView.setImageURI(imgUri);


        //创建DraweeController
        DraweeController controller = Fresco.newDraweeControllerBuilder()
                //加载的图片URI地址
                .setUri(imgUri)
                //设置点击重试是否开启
                .setTapToRetryEnabled(true)
                //设置旧的Controller
                .setOldController(simpleDraweeView.getController())
                //构建
                .build();

        //设置DraweeController
        simpleDraweeView.setController(controller);
    }
}

-----------------------activity_main.xml--------------------------

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:fresco="http://schemas.android.com/apk/res-auto"
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.earl.fresco.MainActivity">

    <com.facebook.drawee.view.SimpleDraweeView
        android:id="@+id/main_sdv"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_centerInParent="true"
        fresco:actualImageScaleType="focusCrop"
        fresco:placeholderImage="@mipmap/icon_placeholder"
        fresco:placeholderImageScaleType="focusCrop"
        fresco:progressBarImage="@mipmap/icon_progress_bar"
        fresco:progressBarImageScaleType="focusCrop"
        fresco:progressBarAutoRotateInterval="5000"
        fresco:failureImage="@mipmap/icon_failure"
        fresco:failureImageScaleType="focusCrop"
        fresco:retryImage="@mipmap/icon_retry"
        fresco:retryImageScaleType="focusCrop"
        fresco:fadeDuration="5000"
        fresco:backgroundImage="@android:color/holo_orange_light"
        fresco:roundWithOverlayColor="@android:color/darker_gray"
        fresco:roundAsCircle="true"></com.facebook.drawee.view.SimpleDraweeView>

</RelativeLayout>

Fresco博客教程地址：http://blog.csdn.net/y1scp/article/details/49245535

网易有道笔记地址: http://note.youdao.com/noteshare?id=5521fbd0128ac3ca01b798776bb07f20&sub=B270250AA4F54F23B7B002A8DDC3176E