1.okhttp是一个高效的、快速的被谷歌认可的，支持HTTP/2和SPDY
volley是一个方便网络任务库，可以负责请求、加载、缓存等同步问题，也可以处理图片、JSON、文本操作起来比较简单
gson是JSON序列化和反序列化（以上三个能相互间轻松使用主要还是因为okhttp是谷歌推荐的、volley是谷歌开发的、Gson是谷歌开发的）
2.okhttp的Get用法：
首先下载jar包，jar包的下载地址我不在发链接！
[代码]java代码：
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Android本身不允许UI做网络线程，要开启一个子线程;Okhttp支持异步线程并回调返回,上面的方法稍加改动即可：
[代码]java代码：
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Okhttp的post的用法：
RequestBody formBody = new FormEncodingBuilder()
.add("platform", "android")
.add("name", "chace")
.add("subject", "乾隆十八掌")
.build();
Request request = new Request.Builder()
.url(url)
.post(body)
.build();
Response response = client.newCall(request).execute();
if (response.isSuccessful()) {
return response.body().string();
} else {
throw new IOException("Unexpected code " + response);
}
这个代码是同步网络请求，异步就改成enqueue就行了。
这个okhttp和gson的用法是整合于网络，不过写的清晰易懂
json串：
{
"data": [
{
"appcontent": "1",
"appname": "UC浏览器",
"apppackagename": "com.UCMobile",
"id": 1,
"remark": "1"
},
{
"appname": "支付宝",
"apppackagename": "com.alipay.android.app",
"id": 2
},
{
"appname": "WPS",
"apppackagename": "cn.wps.moffice_eng",
"id": 3
}
],
"msg": "获取信息列表成功",
"version": 2
}
建立javaBean：
这是数组里面的属性：
public class ApkInfo {
private String apppackagename;
private Integer id;
private String appname;
private String appcontent;
private String remark;
public String getApppackagename() {
return apppackagename;
}
public void setApppackagename(String apppackagename) {
this.apppackagename = apppackagename;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getAppname() {
return appname;
}
public void setAppname(String appname) {
this.appname = appname;
}
public String getAppcontent() {
return appcontent;
}
public void setAppcontent(String appcontent) {
this.appcontent = appcontent;
}
public String getRemark() {
return remark;
}
public void setRemark(String remark) {
this.remark = remark;
}
@Override
public String toString() {
return "ApkInfo [id=" + id + ", remarm="
+ remark + ", appname=" + appname + ", appcontent=" + appcontent
+ ", apppackagename=" + apppackagename + "]";
}
}
这是外部集合的属性：
public class PackageListInfo {
private String msg;
private String version;
private List<Object> data;
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public String getVersion() {
return version;
}
public void setVersion(String version) {
this.version = version;
}
public List<Object> getData() {
return data;
}
public void setData(List<Object> data) {
this.data = data;
}
@Override
public String toString() {
return "PackageListInfo [version=" + version + ", data=" + data + ", msg=" + msg
+ "]";
}
}
新建一个OKHTTP的管理类get得到JSON数据，并进行处理。
import android.util.Log;
import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
public class GetApkPackage {
public static String apkPackageUrl = http://192.168.10.133:8080/getAppInfor;
public static GetApkPackage install = new GetApkPackage();
public static ArrayList<String> appList=new ArrayList<String>();
public void getPackage() {
OkHttpClient mOkHttpClient = new OkHttpClient();
final Request request = new Request.Builder().url(apkPackageUrl).build();
mOkHttpClient.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Call call, IOException e) {
System.out.println("获取apk列表失败");
Log.d("GetApkPackage", e.getMessage());
}
@Override
public void onResponse(Call call, Response response) throws IOException {
String result = response.body().string();
System.out.println(result);
//InputStream is = response.body().byteStream();
//byte[] bytes = response.body().bytes();
Gson gson = new Gson();
PackageListInfo packlist = gson.fromJson(result,PackageListInfo.class);
System.out.println(packlist.getData().toString());
List<ApkInfo> apkList = new ArrayList<ApkInfo>();
Type type = new TypeToken<ArrayList<ApkInfo>>() {}.getType();
apkList = gson.fromJson(packlist.getData().toString(), type);
/*
Map<String,ApkInfo> apkList = gson.fromJson(packlist.getData().toString(),
new TypeToken<List<ApkInfo>>() {
}.getType());
*/
if(apkList == null){
System.out.println("apkpackage列表为空");
return;
}
for(int i =0;i<apkList.size();i++){
String apkName = apkList.get(i).getApppackagename();
System.out.println(apkName);
appList.add(apkName);
}
}
});
}
public static GetApkPackage getInstall(){
return install;
}
}
上述代码中，对JSON数据的处理看起来很简单，只要new一个GSON实例，然后通过gson.fromJson方法，就能够得到json数据
[java] view plain copy 在CODE上查看代码片派生到我的代码片
Gson gson = new Gson();
PackageListInfo packlist = gson.fromJson(result,PackageListInfo.class);
OKHTTP发送一个字符串给服务器的实例如下：
[java] view plain copy 在CODE上查看代码片派生到我的代码片
public final class PostString {
public static final MediaType MEDIA_TYPE_MARKDOWN
= MediaType.parse("text/x-markdown; charset=utf-8");
private final OkHttpClient client = new OkHttpClient();
public void run() throws Exception {
String postBody = ""
+ "Releases\n"
+ "--------\n"
+ "\n"
+ " * _1.0_ May 6, 2016\n"
+ " * _1.1_ June 15, 2016\n"
+ " * _1.2_ August 11, 2016\n";
Request request = new Request.Builder()
.url("https://192.168.10.133:8080/base")
.post(RequestBody.create(MEDIA_TYPE_MARKDOWN, postBody))
.build();
Response response = client.newCall(request).execute();
if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);
System.out.println(response.body().string());
}
public static void main(String... args) throws Exception {
new PostString().run();
}
}
3.Volley的用法：
Volley提供了JsonObjectRequest、JsonArrayRequest、StringRequest等Request形式。
JsonObjectRequest：返回JSON对象。
JsonArrayRequest：返回JsonArray。
StringRequest：返回String，这样可以自己处理数据，更加灵活。
我们创建一个StringRequest：
StringRequest stringRequest = new StringRequest("http://www.apkbus.com/forum.php",
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d("TAG", response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("TAG", error.getMessage(), error);
}
});
这篇主要还是简单了介绍了三者的关系和用法