OkHttp的post网络请求

本次学习了网络请求的应用，列出的实例主要是实现输入手机号，点击登录按钮后，向服务器发送请求，从而获取用户的user_id。服务器接收和返回的数据是json格式的，为了更方便一点，此处还需要使用到Gson来进行解析。需要想服务器发送的Body的字段如下（此处只使用手机号）：

下面开始本次实例。

1、AS导入与请求网络权限配置

（1）在libs下添加这三个jar包

（2）在AndroidManifest文件中打开联网的权限：

<uses-permission android:name="android.permission.INTERNET"/>

2、登录页面的布局文件activity_login.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@mipmap/bg"> <ImageView android:id="@+id/login_iv_pp" android:layout_width="92dp" android:layout_height="105dp" android:src="@mipmap/pp_1" android:layout_gravity="center_horizontal" android:layout_marginTop="75dp"/> <LinearLayout android:id="@+id/login_phone" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="27dp" android:orientation="horizontal"> <ImageView android:id="@+id/login_im_phone" android:layout_width="25dp" android:layout_height="25dp" android:src="@mipmap/phone" android:layout_marginLeft="63dp" android:layout_gravity="center_vertical"/> <EditText android:id="@+id/login_et_phone" android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:background="#0000" android:hint="@string/phone_hint" android:textColorHint="@color/line_below" android:layout_gravity="center_vertical" android:layout_marginLeft="6dp" android:textSize="13dp" android:textColor="@color/btn_text" android:inputType="phone" android:maxLength="11"/> </LinearLayout> <View android:id="@+id/login_phone_bloweline" android:layout_width="match_parent" android:layout_height="1dp" android:background="@color/line_below" android:layout_marginTop="8dp" android:layout_marginLeft="55dp" android:layout_marginRight="55dp"/> <LinearLayout android:id="@+id/login_password" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="24dp" android:orientation="horizontal"> <ImageView android:id="@+id/login_im_password" android:layout_width="25dp" android:layout_height="25dp" android:src="@mipmap/lock" android:layout_marginLeft="63dp" android:layout_gravity="center_vertical"/> <EditText android:id="@+id/login_et_password" android:layout_width="0dp" android:layout_weight="1" android:layout_height="wrap_content" android:background="#0000" android:layout_marginLeft="6dp" android:hint="@string/password_hint" android:textColorHint="@color/line_below" android:layout_gravity="center_vertical" android:textSize="13dp" android:textColor="@color/btn_text" android:inputType="textPassword" android:maxLength="20"/> <ImageView android:id="@+id/login_eye" android:layout_width="25dp" android:layout_height="25dp" android:src="@mipmap/eye2" android:layout_marginRight="57dp"/> </LinearLayout> <View android:id="@+id/login_password_bloweline" android:layout_width="match_parent" android:layout_height="1dp" android:background="@color/line_below" android:layout_marginTop="8dp" android:layout_marginLeft="55dp" android:layout_marginRight="55dp"/> <Button android:id="@+id/login_btn_login" android:layout_width="match_parent" android:layout_height="40dp" android:layout_marginLeft="55dp" android:layout_marginRight="55dp" android:layout_marginTop="46dp" android:layout_gravity="center_horizontal" android:background="@drawable/btn_login" android:text="登录" android:textSize="16dp" android:textColor="#000000"/> <Button android:id="@+id/login_btn_register" android:layout_width="match_parent" android:layout_height="40dp" android:layout_marginLeft="55dp" android:layout_marginRight="55dp" android:layout_marginTop="20dp" android:layout_gravity="center_horizontal" android:background="@drawable/btn_register" android:text="注册" android:textSize="16dp" android:textColor="@color/btn_text"/> <TextView android:id="@+id/login_tv_forget_password" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="20dp" android:gravity="center" android:text="@string/wangjimima" android:textSize="13dp" android:textColor="@color/btn_text"/> </LinearLayout>

3、UserIdRequest.java

public class UserIdRequest { String client_id; int req_time; String sign_key; String mob_phone; String card_id; public UserIdRequest(String client_id, int req_time, String sign_key, String mob_phone, String card_id) { this.client_id = client_id; this.req_time = req_time; this.sign_key = sign_key; this.mob_phone = mob_phone; this.card_id = card_id; } public String getClient_id() { return client_id; } public void setClient_id(String client_id) { this.client_id = client_id; } public int getReq_time() { return req_time; } public void setReq_time(int req_time) { this.req_time = req_time; } public String getSign_key() { return sign_key; } public void setSign_key(String sign_key) { this.sign_key = sign_key; } public String getMob_phone() { return mob_phone; } public void setMob_phone(String mob_phone) { this.mob_phone = mob_phone; } public String getCard_id() { return card_id; } public void setCard_id(String card_id) { this.card_id = card_id; } @Override public String toString() { return "UserIdRequest{" + "client_id='" + client_id + '\'' + ", req_time=" + req_time + ", sign_key='" + sign_key + '\'' + ", mob_phone='" + mob_phone + '\'' + ", card_id='" + card_id + '\'' + '}'; } }

4、UserIdResponse.java(响应后返回的字段有user_id在body中,code,code_msg，code为0，正常，为1，异常)

public class UserIdResponse extends BaseResponse{ Body body; public UserIdResponse(int code, String code_msg, Body body) { super(code, code_msg); this.body = body; } public Body getBody() { return body; } public void setBody(Body body) { this.body = body; } public class Body{ int user_id; public Body(int user_id) { this.user_id = user_id; } public int getUser_id() { return user_id; } public void setUser_id(int user_id) { this.user_id = user_id; } @Override public String toString() { return "Body{" + "user_id=" + user_id + '}'; } } } 5、BaseResponse.java public class BaseResponse { int code; String code_msg; public BaseResponse(int code,String code_msg){ this.code = code; this.code_msg = code_msg; } public int getCode(){ return code; } public void setCode(int code){ this.code = code; } public String getCode_msg(){ return code_msg; } public void setCode_msg(String code_msg){ this.code_msg = code_msg; } public String toString(){ return "BaseResponse{" + "code='" + code + '\'' + "code_msg='" + code_msg + '\'' + "}"; } }

6、LoginActivity.java中代码编写

public class LoginActivity extends Activity { private static final int MSG_GET_USER_ID_SUCCEED = 0X13; private static final int MSG_GET_USER_ID_FAILED = 0X14; public EditText editText; EditText etPhone,etPassword; Handler mHandler = new Handler(){ @Override public void handleMessage(Message msg) { switch (msg.what){ case MSG_GET_USER_ID_SUCCEED: int userID = msg.arg1; Log.e("TAG", "userID = "+userID);//获取user_id成功，则打印 login(userID); break; case MSG_GET_USER_ID_FAILED: String msgObj = (String)msg.obj; //获取user_id失败，直接弹框显示返回的code_msg内容 Toast.makeText(LoginActivity.this, msgObj, Toast.LENGTH_SHORT).show(); break; default: break; } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_login); etPhone = (EditText)findViewById(R.id.login_et_phone); etPassword = (EditText)findViewById(R.id.login_et_password); Button btnLogin = (Button)findViewById(R.id.login_btn_login); //登录 btnLogin.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { getUserID(); } }); //因为android不允许主线程上的网络调用，所以只能在单独的线程或后台服务上进行调用，此处单独建了一个线程 private void getUserID(){ final Thread mUserId = new Thread(){ @Override public void run()｛ String client_id = "xxxx";//此处为固定值，根据各自的平台情况填写 int req_time = (int)(System.currentTimeMillis()/1000); String sign_key = Md5Util.md5(req_time + "binwen");//因计算时需要用md5，所以还需写一个Md5Util的工具类 String mob_phone = etPhone.getText().toString();//根据手机号编辑框数据的手机号获取手机号字符串 String card_id = ""; UserIdRequest mUserIdRequest = new UserIdRequest(client_id,req_time,sign_key,mob_phone,card_id); Gson mGson = new Gson(); String json = mGson.toJson(mUserIdRequest);//将请求的数据转换为json格式 Log.e("TAG", json); String url = "XXXXXX";//引号中填写请求地址 //OkHttp MediaType JSON = MediaType.parse("application/json; charset=utf-8"); //实例化一个OkHttpClient并创建一个Request对象，OkHttpClient可以看作发送者，可以看作请求者Request OkHttpClient mOkHttpClient = new OkHttpClient(); Request mRequest = new Request.Builder() .url(url) .post(RequestBody.create(JSON, json)) .build(); //请求过后的响应，获取返回的json字符串 Response mUserIdResponse = null; try { mUserIdResponse = mOkHttpClient.newCall(mRequest).execute(); } catch (IOException e) { e.printStackTrace(); } String mUserIdResult = null; try { mUserIdResult = mUserIdResponse.body().string(); Log.e("TAG", "mResponse.body().string() = \n" + mUserIdResult); } catch (IOException e) { e.printStackTrace(); } //将响应得到的json字符串用Gson解析。为了防止出现crash，此处先判断BaseResponse返回的code为0还是1，为0，则再接收UserIdResponse的数据，为1，则直接发送消息处理 BaseResponse mBaseResponse = mGson.fromJson(mUserIdResult, BaseResponse.class); int code1 = mBaseResponse.getCode(); String codeMsg1= mBaseResponse.getCode_msg(); if(code1 == 0){ UserIdResponse mUserIdResponseString = mGson.fromJson(mUserIdResult,UserIdResponse.class); int userID = mUserIdResponseString.getBody().getUser_id(); Log.e("TAG", "code_msg = " + codeMsg1); Log.e("TAG", "code = " + code1); Log.e("TAG", "user_id = " + userID); Message msg = new Message(); msg.what = MSG_GET_USER_ID_SUCCEED; msg.arg1 = userID; mHandler.sendMessage(msg); }else { Message msg = new Message(); msg.what = MSG_GET_USER_ID_FAILED; msg.obj = codeMsg1; mHandler.sendMessage(msg); } } }; mUserId.start(); }