Android Retrofit 简单使用 [英] Android Retrofit simple usage

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问题描述

我是第一次尝试使用 Android Retrofit，我正在学习教程并陷入第一步...1.使用Gson2.3、okhttp2.1.0、okhttp-urlconnection2.1.0、retrofit-1.8.02. 我的网络服务在 .php 脚本中并返回这种数据 {"idInfo":"12","typeInfo":"2"}3.我创建了模型类gitmodel

公共类 gitmodel {公共 gitmodel(int idInfo, int typeInfo) {this.idInfo = idInfo;this.typeInfo = typeInfo;}私人 int idInfo;私有整数类型信息；公共 gitmodel() {}公共 int getIdInfo() {返回idInfo；}公共无效 setIdInfo(int idInfo) {this.idInfo = idInfo;}公共 int getTypeInfo() {返回类型信息；}public void setTypeInfo(int typeInfo) {this.typeInfo = typeInfo;}}

"4.我创建了如下所示的接口类 gitapi

公共接口gitapi {@GET("/users/{user}")public void getFeed(@Path("user") String user,Callback response);}

我在此类中收到错误无法解析路径"并且无法解析 gitmodel.我知道这只是一个开始，但我不能继续.

解决方案

尝试以下步骤:

添加 gradle 并同步您的项目

<块引用>

实现'com.squareup.retrofit2:retrofit:2.0.2'

实现'com.squareup.retrofit2:converter-gson:2.0.2'

创建您的 pojo 类并像这样添加模型类

 公共类 LoginModel {@SerializedName("代码")@暴露私人字符串代码；@SerializedName("消息")@暴露私人字符串消息；@SerializedName("数据")@暴露私人数据数据；公共字符串 getCode() {返回码；}公共无效集代码(字符串代码){this.code = 代码;}公共字符串 getMessage() {回消息；}公共无效setMessage(字符串消息){this.message = 消息；}公共数据 getData() {返回数据；}公共无效集数据(数据数据){this.data = 数据；}公共类数据{@SerializedName("id")@暴露私人字符串ID；@SerializedName("facebookId")@暴露私人字符串facebookId；@SerializedName("密码")@暴露私人字符串密码；@SerializedName("securityHash")@暴露私有字符串 securityHash；@SerializedName("用户名")@暴露私人字符串用户名；@SerializedName("firstName")@暴露私人字符串名字；@SerializedName("lastName")@暴露私人字符串姓氏；@SerializedName("email")@暴露私人字符串电子邮件；@SerializedName("联系人")@暴露私人字符串联系人；@SerializedName("userLastLoggedIn")@暴露私人字符串 userLastLoggedIn;@SerializedName("状态")@暴露私有字符串状态；@SerializedName("createdAt")@暴露私人字符串 createdAt;@SerializedName("updatedAt")@暴露私人字符串updatedAt;@SerializedName("profileStatus")@暴露私人字符串配置文件状态；@SerializedName("性别")@暴露私人字符串性别；公共字符串 getId() {返回标识；}公共无效setId(字符串ID){this.id = id;}公共字符串 getFacebookId() {返回facebookId；}公共无效setFacebookId(字符串facebookId){this.facebookId = facebookId;}公共字符串 getPassword() {返回密码；}public void setPassword(字符串密码){this.password = 密码；}公共字符串 getSecurityHash() {返回 securityHash；}public void setSecurityHash(String securityHash) {this.securityHash = securityHash;}公共字符串 getUserName() {返回用户名；}public void setUserName(String userName) {this.userName = 用户名;}公共字符串 getFirstName() {返回名字；}public void setFirstName(String firstName) {this.firstName = firstName;}公共字符串 getLastName() {返回姓氏；}public void setLastName(String lastName) {this.lastName = 姓氏；}公共字符串 getEmail() {回邮件；}公共无效setEmail(字符串电子邮件){this.email = 电子邮件；}公共字符串 getContact() {返回联系方式；}public void setContact(String contact) {this.contact = 联系人；}公共字符串 getUserLastLoggedIn() {返回用户上次登录；}public void setUserLastLoggedIn(String userLastLoggedIn) {this.userLastLoggedIn = userLastLoggedIn;}公共字符串 getStatus() {返回状态；}公共无效 setStatus(字符串状态){this.status = 状态；}公共字符串 getCreatedAt() {返回 createdAt;}public void setCreatedAt(String createdAt) {this.createdAt = createdAt;}公共字符串 getUpdatedAt() {返回更新于；}public void setUpdatedAt(String updatedAt) {this.updatedAt = updatedAt;}公共字符串 getProfileStatus() {返回个人资料状态；}public void setProfileStatus(String profileStatus) {this.profileStatus = profileStatus;}公共字符串 getGender() {回归性别；}公共无效setGender(字符串性别){this.gender = 性别；}}}

在你的包中添加三个类

<块引用>

RetrofitApi 接口
改造客户端
改造内容

1.1 像这样添加 RetrofitApiInterface Calss:

<小时>

 公共接口 RetrofitApiInterface {/*登录API发布方法*/@POST("登录")@FormUrlEncoded调用<登录模型>loginMethod(@Field("email") String email, @Field("password") String password);}

1.2 添加 RetrofitClient 类

<小时>

公共类 RetrofitClient {私有静态改造改造= null;公共静态改造 getClient(String url){如果(改造==空){改造 = 新改造.Builder().baseUrl(网址).addConverterFactory(GsonConverterFactory.create()).建造();}返回改造；}}

1.3 添加 RetrofitConstent 类

<小时>

公共类 RetrofitConstent {公共静态字符串 BASE_URL="";公共静态 RetrofitApiInterface retrofitApiInterface(){返回 RetrofitClient.getClient(BASE_URL).create(RetrofitApiInterface.class);}}

4.添加像这样s

的Retrofit api方法<小时>

/*简单的登录API方法*/public void loginAPIMethod(String email, String password) {dialog = new Dialog(this, android.R.style.Theme_Translucent);dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);dialog.setContentView(R.layout.custom_progress_dialog);dialog.setCancelable(false);对话框显示()；调用<登录模型>呼叫 = 空；尝试 {call = YabbyConstant.retrofitApiInterface().loginMethod(email, password);call.enqueue(new Callback() {@覆盖public void onResponse(Call call, Response response) {/*获取成功响应*/Log.e(TAG + "Response", "" + response.body().getCode());尝试 {if (response.body().getCode().equalsIgnoreCase("1")) {dialog.dismiss();LoginModel.Data 数据 = response.body().getData();/*将数据保存到共享首选项中*/Preference.storeUserPreferences(SignInActivity.this, ApiUtils.USER, new Gson().toJson(response.body().getData()));Log.e(TAG, "sharedLogin" + new Gson().toJson(response.body().getData()));Log.e(TAG, "id" + String.valueOf(data.getId()));Log.e(TAG, "email" + String.valueOf(data.getEmail()));结束();开始活动(新意图(SignInActivity.this，HomeScreenActivity.class))；overridePendingTransition(R.anim.right_to_left, R.anim.left_to_right);String message = response.body().getMessage();Toast.makeText(getApplicationContext(), "" + message, Toast.LENGTH_SHORT).show();} 别的 {字符串数据 = response.body().getMessage();警报对话失败(数据)；Log.e(TAG, "数据--" + 数据);dialog.dismiss();}} catch (NullPointerException e) {e.printStackTrace();}}/* 获取失败响应*/@覆盖public void onFailure(Call call, Throwable t) {dialog.dismiss();Log.e("错误", "" + String.valueOf(t.getMessage()));}});} 捕获(异常 e){e.printStackTrace();}}

请检查我的代码如何使用改造

希望对你有帮助

I'm trying to use Android Retrofit for the first time, I'm following tutorial and get stuck in on of the first steps... 1. Using Gson2.3, okhttp2.1.0, okhttp-urlconnection2.1.0, retrofit-1.8.0 2. my web service is in .php script and returns this kind of data {"idInfo":"12","typeInfo":"2"} 3. I created model class gitmodel

public class gitmodel {
    public gitmodel(int idInfo, int typeInfo) {
        this.idInfo = idInfo;
        this.typeInfo = typeInfo;
    }

    private int idInfo;
    private int typeInfo;
    public gitmodel() {
    }
    public int getIdInfo() {
        return idInfo;
    }
    public void setIdInfo(int idInfo) {
        this.idInfo = idInfo;
    }
    public int getTypeInfo() {
        return typeInfo;
    }
    public void setTypeInfo(int typeInfo) {
        this.typeInfo = typeInfo;
    }
}

" 4. I created interface class gitapi that looks like this

public interface gitapi {

    @GET("/users/{user}")      
    public void getFeed(@Path("user") String user,Callback<gitmodel> response);      
}

I get an error in this class "cannot resolve Path" and cannot resolve gitmodel. I know this is just a start but I cannot go on.

解决方案

Try these following steps:

Add gradle and sync your project

implementation 'com.squareup.retrofit2:retrofit:2.0.2'

implementation 'com.squareup.retrofit2:converter-gson:2.0.2'

create your pojo class and add in model class like this

 public class LoginModel {
 @SerializedName("code")
 @Expose
 private String code;
 @SerializedName("message")
 @Expose
 private String message;
 @SerializedName("data")
 @Expose
  private Data data;

   public String getCode() {
   return code;
   }

  public void setCode(String code) {
  this.code = code;
 }

 public String getMessage() {
 return message;
 }

 public void setMessage(String message) {
 this.message = message;
 }

 public Data getData() {
  return data;
 }

public void setData(Data data) {
this.data = data;
}

public class Data {

@SerializedName("id")
@Expose
private String id;
@SerializedName("facebookId")
@Expose
private String facebookId;
@SerializedName("password")
@Expose
private String password;
@SerializedName("securityHash")
@Expose
private String securityHash;
@SerializedName("userName")
@Expose
private String userName;
@SerializedName("firstName")
@Expose
private String firstName;
@SerializedName("lastName")
@Expose
private String lastName;
@SerializedName("email")
@Expose
private String email;
@SerializedName("contact")
@Expose
private String contact;
@SerializedName("userLastLoggedIn")
@Expose
private String userLastLoggedIn;
@SerializedName("status")
@Expose
private String status;
@SerializedName("createdAt")
@Expose
private String createdAt;
@SerializedName("updatedAt")
@Expose
private String updatedAt;
@SerializedName("profileStatus")
@Expose
private String profileStatus;
@SerializedName("gender")
@Expose
private String gender;

public String getId() {
    return id;
}

public void setId(String id) {
    this.id = id;
}

public String getFacebookId() {
    return facebookId;
}

public void setFacebookId(String facebookId) {
    this.facebookId = facebookId;
}

public String getPassword() {
    return password;
}

public void setPassword(String password) {
    this.password = password;
}

public String getSecurityHash() {
    return securityHash;
}

public void setSecurityHash(String securityHash) {
    this.securityHash = securityHash;
}

public String getUserName() {
    return userName;
}

public void setUserName(String userName) {
    this.userName = userName;
}

public String getFirstName() {
    return firstName;
}

public void setFirstName(String firstName) {
    this.firstName = firstName;
}

public String getLastName() {
    return lastName;
}

public void setLastName(String lastName) {
    this.lastName = lastName;
}

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

public String getContact() {
    return contact;
}

public void setContact(String contact) {
    this.contact = contact;
}

public String getUserLastLoggedIn() {
    return userLastLoggedIn;
}

public void setUserLastLoggedIn(String userLastLoggedIn) {
    this.userLastLoggedIn = userLastLoggedIn;
}

public String getStatus() {
    return status;
}

public void setStatus(String status) {
    this.status = status;
}

public String getCreatedAt() {
    return createdAt;
}

public void setCreatedAt(String createdAt) {
    this.createdAt = createdAt;
}

public String getUpdatedAt() {
    return updatedAt;
}

public void setUpdatedAt(String updatedAt) {
    this.updatedAt = updatedAt;
}

public String getProfileStatus() {
    return profileStatus;
}

public void setProfileStatus(String profileStatus) {
    this.profileStatus = profileStatus;
}

public String getGender() {
    return gender;
}

public void setGender(String gender) {
    this.gender = gender;
}

}
}

add three class in your package

RetrofitApiInterfaces

RetrofitClient

RetrofitConstent

1.1 Add RetrofitApiInterface Calss like this:

 public interface RetrofitApiInterface {

/*Login API Post Method*/
@POST("login")
@FormUrlEncoded
Call<LoginModel> loginMethod(@Field("email") String email, @Field("password") String password);
 }

1.2 Add RetrofitClient calss

public class RetrofitClient {
private static Retrofit retrofit = null;
public static Retrofit getClient(String url){
    if(retrofit == null){
        retrofit = new Retrofit.Builder()
                .baseUrl(url)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
    }
    return retrofit;
}
}

1.3 Add RetrofitConstent class

public class RetrofitConstent {
public static String BASE_URL="";

public static RetrofitApiInterface retrofitApiInterface(){
    return RetrofitClient.getClient(BASE_URL).create(RetrofitApiInterface.class);
}
 }

4. Add Retrofit api method like this

   /*simple login API method*/
public void loginAPIMethod(String email, String password) {
    dialog = new Dialog(this, android.R.style.Theme_Translucent);
    dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
    dialog.setContentView(R.layout.custom_progress_dialog);
    dialog.setCancelable(false);
    dialog.show();
    Call<LoginModel> call = null;
    try {
        call = YabbyConstant.retrofitApiInterface().loginMethod(email, password);
        call.enqueue(new Callback<LoginModel>() {
            @Override
            public void onResponse(Call<LoginModel> call, Response<LoginModel> response) {
                /*getting success response */
                Log.e(TAG + "Response", "" + response.body().getCode());
                try {
                    if (response.body().getCode().equalsIgnoreCase("1")) {
                        dialog.dismiss();
                        LoginModel.Data data = response.body().getData();
                        /*save data into shared preference*/
                        Preference.storeUserPreferences(SignInActivity.this, ApiUtils.USER, new Gson().toJson(response.body().getData()));
                        Log.e(TAG, "sharedLogin" + new Gson().toJson(response.body().getData()));
                        Log.e(TAG, "id" + String.valueOf(data.getId()));
                        Log.e(TAG, "email" + String.valueOf(data.getEmail()));
                        finish();
                        startActivity(new Intent(SignInActivity.this, HomeScreenActivity.class));
                        overridePendingTransition(R.anim.right_to_left, R.anim.left_to_right);
                        String message = response.body().getMessage();
                        Toast.makeText(getApplicationContext(), "" + message, Toast.LENGTH_SHORT).show();
                    } else {
                        String data = response.body().getMessage();
                        alertDialogueFail(data);
                        Log.e(TAG, "data--" + data);
                        dialog.dismiss();
                    }
                } catch (NullPointerException e) {
                    e.printStackTrace();
                }
            }

            /* getting failure response*/
            @Override
            public void onFailure(Call<LoginModel> call, Throwable t) {
                dialog.dismiss();
                Log.e("Error", "" + String.valueOf(t.getMessage()));
            }
        });
    } catch (Exception e) {
        e.printStackTrace();
    }
}

Please Check my code how retrofit used

i hope its helps you

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