下面的get和post都必须在子线程中执行
get请求：
private OkHttpClient client = new OkHttpClient();
String get(String url) throws IOException {
Request request = new Request.Builder()
.url(url)
.build();
Response response = client.newCall(request).execute();
return response.body().string();
}
post请求：
private OkHttpClient client = new OkHttpClient();
public static final MediaType JSON
= MediaType.parse("application/json; charset=utf-8");
String post(String url, String json) throws IOException {
RequestBody body = RequestBody.create(JSON, json);
Request request = new Request.Builder()
.url(url)
.post(body)
.build();
Response response = client.newCall(request).execute();
return response.body().string();
}
post请求第二个参数是请求的上传的json数据。如果没有要上传这赋值：“”
还有一种不用jar包的方式：
OkHttpUtils的使用：
在github搜索OkHttp，哪个点赞多点击哪个好吧。之后拉到下面找到下面这个：
将 implementation(“com.squareup.okhttp3:okhttp:4.4.0”) 复制进 build.gradle文件（dependencies 里面）。然后进行右上角的同步。即可是使用了。
直接上全部代码先理解着，以后再写详细点：
private static final String PATH ="http://192.168.137.1:8080/cookie_war_exploded/ShopInfoServlet" ;
private static final String TAG="okhttp";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
//get，返回数据
public void getRequest(View view){
OkHttpClient okHttpClient = new OkHttpClient.Builder()
.connectTimeout(10000, TimeUnit.MILLISECONDS)
.build();
//创建连接请求内容
Request request=new Request.Builder()
.get()
.url(PATH)
.build();
//用Client去创建请求任务
Call task=okHttpClient.newCall(request);
//异步任务
task.enqueue(new Callback() {
@Override
public void onFailure(@NotNull Call call, @NotNull IOException e) {
Log.e(TAG," onFailure:"+e.toString());
}
@Override
public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
int code = response.code();
if(code== HttpURLConnection.HTTP_OK){
Log.e(TAG,"code:"+code);
ResponseBody body = response.body();
Log.e(TAG,"onResponse :"+body.string());
}
}
});
}
//post，返回数据
public void postCommit(View view){
//先有CLient
OkHttpClient client=new OkHttpClient.Builder()
.connectTimeout(10000,TimeUnit.MILLISECONDS)
.build();
//要提交的内容
String str="在吗";
str=new Gson().toJson(str);
MediaType mediaType=MediaType.parse("application/json");
RequestBody body=RequestBody.create(str,mediaType);
final Request request=new Request.Builder()
.post(body)
.url(PATH)
.build();
Call task=client.newCall(request);
task.enqueue(new Callback() {
@Override
public void onFailure(@NotNull Call call, @NotNull IOException e) {
Log.e(TAG,"onFailure"+e.toString());
}
@Override
public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
int code = response.code();
ResponseBody responseBody = response.body();
Log.e(TAG,"onResponse"+code+"----"+responseBody.string());
}
});
}
//上传文件到服务器。由于我没做过服务器来接收文件。所以这里先写个代码记录下。等下次会了再回来写详细点
public void postFile(View view){
OkHttpClient client=new OkHttpClient.Builder()
.connectTimeout(10000,TimeUnit.MILLISECONDS)
.build();
File file=new File("/data/data/com.example.mybitmap/files/qq.jpg");
MediaType fileType=MediaType.parse("image/png");
RequestBody fileBody=RequestBody.create(file,fileType);
final RequestBody requestBody = new MultipartBody.Builder()
.addFormDataPart("file",file.getName(),fileBody)
.build();
Request request=new Request.Builder()
.post(requestBody)
.url(PATH)
.build();
Call task=client.newCall(request);
task.enqueue(new Callback() {
@Override
public void onFailure(@NotNull Call call, @NotNull IOException e) {
Log.e(TAG,"....");
}
@Override
public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
Log.e(TAG,"....");
if((response.code()==HttpURLConnection.HTTP_OK)){
ResponseBody body=response.body();
if(body!=null){
String result=body.string();
Log.e(TAG,"....");
}
}
}
});
}
}