Android开源框架——图片加载与缓存库 Picasso

介绍

Picasso是由Square开发的一款图片库，具有强大的下载与缓存功能，可以对图片进行处理。它简化了来自外部图片的处理过程，尤其是远程图片。

开源地址：https://github.com/square/picasso

安装

build.gradle

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

图片处理功能

缩放

Picasso.with(this)
.load("https://img-blog.csdn.net/20160605162635345")
.resize(100, 100)
.into(imageView)

旋转

Picasso.with(this)
.load("https://img-blog.csdn.net/20160605162635345")
.rotate(180)
.into(imageView);

默认图片

Picasso.with(this)
.load("https://img-blog.csdn.net/20160605162635345")
.placeholder(R.drawable.image_name)
.into(imageView);

加载失败图片

Picasso.with(this)
.load("https://img-blog.csdn.net/20160605162635345")
.error(R.drawable.image_name)
.into(imageView);

组合

Picasso.with(this)
.load("https://img-blog.csdn.net/20160605162635345")
.placeholder(R.drawable.image_name_default)
.error(R.drawable.image_name_error)
.into(imageView);

Demo

package com.app.client;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ImageView;

import com.squareup.picasso.Picasso;

public class MainActivity extends AppCompatActivity {

private ImageView imageView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

imageView = (ImageView) findViewById(R.id.imageId);
Picasso.with(getApplicationContext()).load("https://img-blog.csdn.net/20160605162635345").into(imageView);
}
}