Android OkHttp基本用法
okhttp引用设置
Android studio添加引用okhttp.jar包
注意：build.gradle中总共2个添加
compile 'com.squareup.okio:okio:1.5.0'
compile 'com.squareup.okhttp:okhttp:2.4.0'
描述：
关键1：使用前，对于Android Studio的用户，可以选择添加:
compile 'com.squareup.okhttp:okhttp:2.4.0'
关键2：okhttp内部依赖okio，所以，别忘了同时导入okio：
compile 'com.squareup.okio:okio:1.5.0'
具体操作如下：
在app文件夹 ->
build.gradle文件添加相应代码 ->
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
compile 'com.android.support:appcompat-v7:23.1.1'
compile 'com.squareup.okio:okio:1.5.0'
compile 'com.squareup.okhttp:okhttp:2.5.0'
compile files('libs/gson-2.2.1.jar')
compile files('libs/okhttp-2.3.0.jar')
注意：compile files('libs/okhttp-2.3.0.jar')是手动添加jar文件生成的代码，
compile 'com.squareup.okhttp:okhttp:2.5.0'是用系统搜寻出来的格式
2者之中保留一个即可。
}
修改完毕点击右上角"Sync Now" ->
注意：配置Android权限，设置允许网络请求
在AndroidManifest.xml文件中
===============================================
关键类：RequestBody添加参数
RequestBody formBody = new FormEncodingBuilder()
.add("platform", "android")
.add("name", "bug")
.add("subject", "XXXXXXXXXXXXXXX")
.build();
关键类：Request
Request request = new Request.Builder()
.url(url)
.post(body)
.build();
关键类：Response
Response response = client.newCall(request).execute();
关键类：call.enqueue：以异步的方式去执行请求，所以调用的是call.enqueue，将call加入调度队列，然后等待任务执行完成，在Callback中即可得到结果。
Call call = mOkHttpClient.newCall(request);
//请求加入调度
call.enqueue(new Callback()
{
@Override
public void onFailure(Request request, IOException e)
{
}
@Override
public void onResponse(final Response response) throws IOException
{
//String htmlStr = response.body().string();
}
});
网络请求权限设置
=========================================================HTTP请求之 同步 GET请求=========================================================
private final OkHttpClient client = new OkHttpClient();
public void run() throws Exception {
Request request = new Request.Builder()
.url("http://publicobject.com/helloworld.txt")
.build();
Response response = client.newCall(request).execute();
if (!response.isSuccessful())
throw new IOException("Unexpected code " + response);
Headers responseHeaders = response.headers();
for (int i = 0; i < responseHeaders.size(); i++) {
System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
}
System.out.println(response.body().string());
}
Response类的string()方法会把文档的所有内容加载到内存，适用于小文档，对应大于1M的文档，应 使用流()的方式获取。
response.body().byteStream()
=========================================================HTTP请求之 异步 GET请求=========================================================
private final OkHttpClient client = new OkHttpClient();
public void run() throws Exception {
Request request = new Request.Builder()
.url("http://publicobject.com/helloworld.txt")
.build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onFailure(Request request, IOException e) {
e.printStackTrace();
}
@Override
public void onResponse(Response response) throws IOException {
if (!response.isSuccessful()) {
throw new IOException("Unexpected code " + response);
}
Headers responseHeaders = response.headers();
for (int i = 0; i < responseHeaders.size(); i++) {
System.out.println(responseHeaders.name(i) + ": " + responseHeaders.value(i));
}
System.out.println(response.body().string());
}
});
}
读取响应会阻塞当前线程，所以发起请求是在主线程，回调的内容在非主线程中。
=========================================================HTTP请求之POST方式提交字符串=========================================================
private 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, 2013\n"
+ " * _1.1_ June 15, 2013\n"
+ " * _1.2_ August 11, 2013\n";
Request request = new Request.Builder()
.url("https://api.github.com/markdown/raw")
.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());
}
因为整个请求体都在内存中，应避免提交1M以上的文件
=========================================================HTTP请求之POST方式提交流=========================================================
private final OkHttpClient client = new OkHttpClient();
public void run() throws Exception {
RequestBody requestBody = new RequestBody() {
@Override
public MediaType contentType() {
return MEDIA_TYPE_MARKDOWN;
}
@Override
public void writeTo(BufferedSink sink) throws IOException {
sink.writeUtf8("Numbers\n");
sink.writeUtf8("-------\n");
for (int i = 2; i <= 997; i++) {
sink.writeUtf8(String.format(" * %s = %s\n", i, factor(i)));
}
}
private String factor(int n) {
for (int i = 2; i < n; i++) {
int x = n / i;
if (x * i == n) return factor(x) + " × " + i;
}
return Integer.toString(n);
}
};
Request request = new Request.Builder()
.url("https://api.github.com/markdown/raw")
.post(requestBody)
.build();
Response response = client.newCall(request).execute();
if (!response.isSuccessful())
throw new IOException("Unexpected code " + response);
System.out.println(response.body().string());
}
使用Okio框架以流的形式将内容写入，这种方式不会出现内存溢出问题。
=========================================================HTTP请求之POST方式提交文件=========================================================
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 {
File file = new File("README.md");
Request request = new Request.Builder()
.url("https://api.github.com/markdown/raw")
.post(RequestBody.create(MEDIA_TYPE_MARKDOWN, file))
.build();
Response response = client.newCall(request).execute();
if (!response.isSuccessful())
throw new IOException("Unexpected code " + response);
System.out.println(response.body().string());
}
=========================================================HTTP请求之POST方式提交表单=========================================================
private final OkHttpClient client = new OkHttpClient();
public void run() throws Exception {
RequestBody formBody = new FormEncodingBuilder()
.add("search", "Jurassic Park")
.build();
Request request = new Request.Builder()
.url("https://en.wikipedia.org/w/index.php")
.post(formBody)
.build();
Response response = client.newCall(request).execute();
if (!response.isSuccessful())
throw new IOException("Unexpected code " + response);
System.out.println(response.body().string());
}
表单的每个Names-Values都进行了URL编码。如果服务器端接口未进行URL编码，可定制个 FormBuilder。
=========================================================HTTP请求之文件上传（兼容html文件上传）=========================================================
private static final String IMGUR_CLIENT_ID = "...";
private static final MediaType MEDIA_TYPE_PNG = MediaType.parse("image/png");
private final OkHttpClient client = new OkHttpClient();
public void run() throws Exception {
// Use the imgur image upload API as documented at https://api.imgur.com/endpoints/image
RequestBody requestBody = new MultipartBuilder()
.type(MultipartBuilder.FORM)
.addPart(
Headers.of("Content-Disposition", "form-data; name=\"title\""),
RequestBody.create(null, "Square Logo"))
.addPart(
Headers.of("Content-Disposition", "form-data; name=\"image\""),
RequestBody.create(MEDIA_TYPE_PNG, new File("website/static/logo-square.png")))
.build();
Request request = new Request.Builder()
.header("Authorization", "Client-ID " + IMGUR_CLIENT_ID)
.url("https://api.imgur.com/3/image")
.post(requestBody)
.build();
Response response = client.newCall(request).execute();
if (!response.isSuccessful())
throw new IOException("Unexpected code " + response);
System.out.println(response.body().string());
}
代码实例
XML文件
Activity文件
package com.info.activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import com.google.gson.Gson;
import com.info.config.ConstantInfo;
import com.info.model.UserView;
import com.squareup.okhttp.Call;
import com.squareup.okhttp.Callback;
import com.squareup.okhttp.FormEncodingBuilder;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
public class Main2Activity extends AppCompatActivity {
private Button btnLogin;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
btnLogin = (Button) findViewById(R.id.button4);
btnLogin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
String result = run();
} catch (IOException e) {
e.printStackTrace();
}
}
});
}
public String run() throws IOException {
String loginUrl = "http://192.168.1.41:8023/api/user/login";
RequestBody formBody = new FormEncodingBuilder()
.add("UserName", "admin")
.add("Password", "000000")
.build();
OkHttpClient mOkHttpClient = new OkHttpClient();
Request request = new Request.Builder()
.url(loginUrl)
.post(formBody)
.build();
Call call = mOkHttpClient.newCall(request);
call.enqueue(new Callback() {
@Override
public void onFailure(Request request, IOException e) {
}
@Override
public void onResponse(Response response) throws IOException {
String jsonResult = response.body().string();
Gson gson=new Gson();
UserView model = gson.fromJson(jsonResult,UserView.class);
Log.e("T", jsonResult);
Log.e("r", model.getData().getUserName());
}
});
return "";
}
}
升级版，封装Okhttp工具类，待续...