初次使用Retrofit和Gson

直接贴源码，供自己继续学习。

写在前面：

添加依赖库是必须的。

dependencies {    //添加retrofit和gson的依赖。    compile 'com.squareup.retrofit2:retrofit:2.3.0'    compile 'com.squareup.retrofit2:converter-gson:2.3.0'    compile 'com.squareup.retrofit2:converter-scalars:2.3.0'    compile 'com.squareup.retrofit2:adapter-rxjava:2.3.0'    compile 'com.google.code.gson:gson:2.8.1'}

首先定义一个接口类，相当于路由集合：

public interface RequestServes {    @POST("user")    Call<String> register(@Query("phone") String phone,                           @Query("password") String password);    @GET("user")    Call<String> login(@Query("phone") String phone,                       @Query("password") String password);}

其次定义一个实体类，用来解析请求结果：

public class User {    private String name,phone,password,created_at,updated_at;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getPhone() {        return phone;    }    public void setPhone(String phone) {        this.phone = phone;    }    public String getPassword() {        return password;    }    public void setPassword(String password) {        this.password = password;    }    public String getCreated_at() {        return created_at;    }    public void setCreated_at(String created_at) {        this.created_at = created_at;    }    public String getUpdated_at() {        return updated_at;    }    public void setUpdated_at(String updated_at) {        this.updated_at = updated_at;    }}

然后在活动总进行请求：

public class MainActivity extends AppCompatActivity implements View.OnClickListener {    Retrofit retrofit;    EditText phone,password;    Button login,register;    TextView result;    SharedPreferences user;    SharedPreferences.Editor editor;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        retrofit = new Retrofit.Builder()                .baseUrl("http://a.95home.top/")                //增加返回值为String的支持                .addConverterFactory(ScalarsConverterFactory.create())                //增加返回值为Gson的支持(以实体类返回)                .addConverterFactory(GsonConverterFactory.create())                //增加返回值为Oservable<T>的支持                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())                .build();        phone = (EditText) findViewById(R.id.phone_edit);        password = (EditText) findViewById(R.id.password_edit);        login = (Button) findViewById(R.id.btn_login);        register = (Button) findViewById(R.id.btn_register);        result = (TextView) findViewById(R.id.show_response);        login.setOnClickListener(this);        register.setOnClickListener(this);        user = getSharedPreferences("user",MODE_PRIVATE);        editor = user.edit();    }    public void register(){        String phone = this.phone.getText().toString();        String password = this.password.getText().toString();        RequestServes requestServes = retrofit.create(RequestServes.class);//这里采用的是Java的动态代理模式        Call<String> call = requestServes.register(phone,password);//传入我们请求的键值对的值        call.enqueue(new Callback<String>() {            @Override            public void onResponse(Call<String> call, Response<String> response) {                //Toast.makeText(MainActivity.this,"请求成功",Toast.LENGTH_LONG).show();                //Log.e("===","return:"+response.body().toString());                try {                    JSONObject resp = new JSONObject(response.body().toString());                    if ("success".equals(resp.getString("status"))){                        Gson gson = new Gson();                        /**                         * 用Gson解析json                         * 注意：User 中的成员变量名要和Json中键名一致，名称一致，数量一致                         */                        User user = gson.fromJson(resp.getString("user"),User.class);                        Log.e("name","return:"+user.getName());                        Log.e("phone","return:"+user.getPhone());                        Log.e("password","return:"+user.getPassword());                        Log.e("createTime","return:"+user.getCreated_at());                        Log.e("updateTime","return:"+user.getUpdated_at());                        editor.putString("name",user.getName());                        editor.putString("phone",user.getPhone());                        editor.putString("password",user.getPassword());                        editor.commit();                        result.setText(user.getPhone());                    } else {                        Log.e("msg","return:"+resp.getString("msg"));                        result.setText(resp.getString("msg"));                    }                } catch (Exception e) {                    e.printStackTrace();                }            }            @Override            public void onFailure(Call<String> call, Throwable t) {                Log.e("===","失败");            }        });    }    public void login(){        String phone = this.phone.getText().toString();        String password = this.password.getText().toString();        RequestServes requestServes = retrofit.create(RequestServes.class);//这里采用的是Java的动态代理模式        Call<String> call = requestServes.login(phone,password);//传入我们请求的键值对的值        call.enqueue(new Callback<String>() {            @Override            public void onResponse(Call<String> call, Response<String> response) {                //Toast.makeText(MainActivity.this,"请求成功",Toast.LENGTH_LONG).show();                //Log.e("===","return:"+response.body().toString());                try {                    JSONObject resp = new JSONObject(response.body().toString());                    if ("success".equals(resp.getString("status"))){                        Gson gson = new Gson();                        User user = gson.fromJson(resp.getString("user"),User.class);                        Log.e("name","return:"+user.getName());                        Log.e("phone","return:"+user.getPhone());                        Log.e("password","return:"+user.getPassword());                        editor.putString("name",user.getName());                        editor.putString("phone",user.getPhone());                        editor.putString("password",user.getPassword());                        editor.commit();                        result.setText(user.getPhone());                    } else {                        Log.e("msg","return:"+resp.getString("msg"));                        result.setText(resp.getString("msg"));                    }                } catch (Exception e) {                    e.printStackTrace();                }                            }            @Override            public void onFailure(Call<String> call, Throwable t) {                Log.e("===","失败");            }        });    }    @Override    public void onClick(View view) {        int id = view.getId();        switch (id){            case R.id.btn_login:                login();                break;            case R.id.btn_register:                register();                break;            default:                break;        }    }}

最后贴上简单的布局文件：

<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content">        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="phone"/>        <EditText            android:id="@+id/phone_edit"            android:layout_width="match_parent"            android:layout_height="wrap_content" />    </LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content">        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="password"/>        <EditText            android:id="@+id/password_edit"            android:layout_width="match_parent"            android:layout_height="wrap_content" />    </LinearLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content">        <Button            android:id="@+id/btn_login"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:layout_weight="1"            android:text="login"/>        <Button            android:id="@+id/btn_register"            android:layout_width="0dp"            android:layout_height="wrap_content"            android:text="register"            android:layout_weight="1"/>    </LinearLayout>    <TextView        android:id="@+id/show_response"        android:layout_width="wrap_content"        android:layout_height="wrap_content" /></LinearLayout>

写在后面：

其实我也还没明白是什么原理。先用起来吧。慢慢研究。路漫漫其修远兮。。。。。。。。。。。。。。。。。。