Glide开源库结合RecyclerView实现加载图片

问题？
如何在RecyclerView上面动态图片，同时这个图片的地址存储在Json字符串中的呢？

准备工作：
我们需要在用到两个jar包

其中glide，是加载图片的框架，gson则是用来解析json数据和将javabean转换为json字符串的jar包。

开始撸代码

1 在主界面定义一个recyclerview的布局文件activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerview"
android:layout_width="match_parent"
android:layout_height="match_parent" />

</RelativeLayout>

2 在java代码中定义

package com.glc.test;

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

import com.google.gson.Gson;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private List<Student> mStudents = new ArrayList<>();
//自己模拟的json字符串
private String jsonStr = "{\"name\":\"图图\",\"PicIUri\":\"http://pic14.nipic.com/20110522/7411759_164157418126_2.jpg\"}\n";

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

private void initView() {
recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
}

private void initData() {
//这里使用Gson来解析成javabean,用法比较简单，可百度
Gson gson = new Gson();
for(int i = 0;i<20;i++){
mStudents.add(gson.fromJson(jsonStr, Student.class));
}
}
}

3 然后给recyclerview定制适配器

myRecyclerViewAdapter = new MyRecyclerViewAdapter(this, mStudents);
recyclerView.setAdapter(myRecyclerViewAdapter);
//recyclerview的布局管理器必须要添加，否则不能显示
LinearLayoutManager manager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
recyclerView.setLayoutManager(manager);

package com.glc.test;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;

import java.util.List;

/**
* Created by GLC on 2015/12/2.
*/
public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.MyViewHolder> {
private List<Student> mStudents;
private Context mContext;
private LayoutInflater inflater;

public MyRecyclerViewAdapter(Context mContext, List<Student> mStudents) {
this.mContext = mContext;
this.mStudents = mStudents;
inflater = LayoutInflater.from(mContext);
}

@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = inflater.inflate(R.layout.item, parent, false);
return new MyViewHolder(v);
}

@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
//这里就是加载了网络中的图片        Glide.with(mContext).load(mStudents.get(position).getUrl()).into(holder.imageView);
holder.textView.setText(mStudents.get(position).getName());
}
@Override
public int getItemCount() {
return mStudents.size();
}

class MyViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
TextView textView;

public MyViewHolder(View itemView) {
super(itemView);
imageView = (ImageView) itemView.findViewById(R.id.image);
textView = (TextView) itemView.findViewById(R.id.text);
}
}
}

另外的recyclerview的子布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">

<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@mipmap/ic_launcher" />

<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:text="这是一个姓名" />
</LinearLayout>

还有一个Student的JavaBean

package com.glc.test;

/**
* Created by GLC on 2015/12/2.
*/
public class Student {
private String name;
private String url;

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public String getUrl() {
return url;
}

public void setUrl(String url) {
this.url = url;
}
}

这样整个效果已经完成了