OKHttp是一个十分常用的网络请求框架了，用于android中请求网络。
除了OKHttp，如今Android中主流的网络请求框架有：
在build.gradle 添加如下依赖
implementation 'com.squareup.okhttp3:okhttp:4.9.0'
添加网络权限
<uses-permission android:name="android.permission.INTERNET"/>
/**
* 同步Get同求
*
* @param url url
* @return
*/
public String syncGet(String url) {
String result = "";
//1.创建OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient();
Request request = new Request.Builder()
.url(url)
.get()
.build();
final Call call = okHttpClient.newCall(request);
//4.同步调用会阻塞主线程,这边在子线程进行
new Thread(new Runnable() {
@Override
public void run() {
try {
//同步调用,返回Response,会抛出IO异常
Response response = call.execute();
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
return result;
}
/**
* 异步Get同求
*
* @param url url
* @return
*/
public void nonSyncGet(String url, Callback responseCallback) {
String result = null;
//1.创建OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient();
//2.创建Request对象
Request request = new Request.Builder()
.url(url)
.get()
.build();
Call call =okHttpClient.newCall(request);
call.enqueue(responseCallback);
}
在OkHttp中用Post方法把键值对数据传送到服务器，使用FormBody.Builder创建请求的参数键值，构建一个RequestBody对象，
/**
* 同步Post同求
*
* @param url url
* @return
*/
public String syncPost(String url) {
String result = null;
//1.创建OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient();
FormBody.Builder mBuild = new FormBody.Builder();
mBuild.add("name", "tony")
.add("age", "21");
RequestBody requestBody= mBuild.build();
Request request = new Request.Builder()
.url(url)
.post(requestBody)
.build();
Response response = null;
try {
response = okHttpClient.newCall(request).execute();
if (response.isSuccessful()) {
result = response.body().string();
} else {
throw new IOException("Unexpected code " + response);
}
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
/**
* 异步Post同求
*
* @param url url
* @return
*/
public void nonSyncPost(String url, Callback responseCallback) {
//1.创建OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient();
FormBody.Builder mBuild = new FormBody.Builder();
mBuild.add("name", "tony")
.add("age", "21");
RequestBody requestBody= mBuild.build();
Request request = new Request.Builder()
.url(url)
.post(requestBody)
.build();
try {
okHttpClient.newCall(request).enqueue(responseCallback);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Post json
*
* @param url url
* @return
*/
public String postJson(String url, Callback responseCallback) {
String result = null;
String jsonStr = "json";
//1.创建OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient();
MediaType mediaType = MediaType.parse("application/json; charset=utf-8");
RequestBody requestBody = RequestBody.create(mediaType, jsonStr);
Request request = new Request.Builder()
.url(url)
.post(requestBody)
.build();
Response response = null;
try {
response = okHttpClient.newCall(request).execute();
if (response.isSuccessful()) {
result = response.body().string();
} else {
throw new IOException("Unexpected code " + response);
}
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
/**
* Post String
*
* @param url url
* @return
*/
public String postString(String url, Callback responseCallback) {
String result = null;
//1.创建OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient();
RequestBody requestBody = RequestBody.create(MediaType.parse("text/plain;charset=utf-8"),
"{username:tony;password:123456}");
Request request = new Request.Builder()
.url(url)
.post(requestBody)
.build();
Response response = null;
try {
response = okHttpClient.newCall(request).execute();
if (response.isSuccessful()) {
result = response.body().string();
} else {
throw new IOException("Unexpected code " + response);
}
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
/**
* Post 表单
*
* @param url url
* @return
*/
public String postForm(String url, Callback responseCallback) {
String result = null;
//1.创建OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient();
MultipartBody.Builder mBuild = new MultipartBody.Builder()
.setType(MultipartBody.FORM)
.addFormDataPart("username", "tony")
.addFormDataPart("password", "123456");
RequestBody requestBody= mBuild.build();
Request request = new Request.Builder()
.url(url)
.post(requestBody)
.build();
Response response = null;
try {
response = okHttpClient.newCall(request).execute();
if (response.isSuccessful()) {
result = response.body().string();
} else {
throw new IOException("Unexpected code " + response);
}
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
public void uploadFile(String url) {
ArrayList<String> filelist = getFileList();
//1.创建OkHttpClient对象
OkHttpClient okHttpClient = new OkHttpClient();
MultipartBody.Builder multipartBody = new MultipartBody.Builder().setType(MultipartBody.FORM);
for (int i = 0; i < filelist.size(); i++) {
String path = filelist.get(i);
File file = new File(path);
String fileMimeType = getMimeType(file);
//这里获取文件类型，方法自己定义
MediaType mediaType = MediaType.parse(fileMimeType);
RequestBody fileBody = RequestBody.create(mediaType, file);
multipartBody.addFormDataPart("file" + i, file.getName(), fileBody);
}
RequestBody requestBody = multipartBody.build();
Request requestPostFile = new Request.Builder()
.url(url)
.post(requestBody)
.build();
Response response = null;
try {
response = okHttpClient.newCall(requestPostFile).execute();
if (response.isSuccessful()) {
} else {
throw new IOException("Unexpected code " + response);
}
} catch (IOException e) {
e.printStackTrace();
}
}
