Retrofit使用

Retrofit：Square提供的开源产品，为Android平台的应用提供一个类型安全的REST客户端

https://github.com/square/retrofit

RxAndroid：响应式编程框架RxJava针对Android平台的扩展。

https://github.com/ReactiveX/RxAndroidhttps://github.com/ReactiveX/RxJava

Dagger2：依赖注入(或叫ioc,用过Spring的都知道这东东)框架，用于解耦的。

https://github.com/google/dagger/

使用 ：

1、通过配置gradle配置将Retrofit框架引入项目。

    compile 'com.squareup.retrofit:retrofit:2.0.0-beta2'    compile 'com.squareup.retrofit:converter-gson:2.0.0-beta2'

2、编写API服务代码

     

package com.micky.retrofitrxandroiddagger2.data.api;import com.micky.retrofitrxandroiddagger2.data.api.response.GetIpInfoResponse;import retrofit.Call;import retrofit.http.GET;import retrofit.http.Query;import rx.Observable;/** * @Project retrofitrxandroiddagger2 * @Packate com.micky.retrofitrxandroiddagger2.data.api * @Description * @Author Micky Liu * @Email [e-mail] * @Date 2015-12-21 17:22 * @Version 1.0 */public interface ApiService {    @GET("service/getIpInfo.php")    Call<GetIpInfoResponse> getIpInfo(@Query("ip") String ip);}

3、定义接收数据的response

package com.micky.retrofitrxandroiddagger2.data.api.response;import com.micky.retrofitrxandroiddagger2.data.api.model.IpInfo;/** * @Project CommonProject * @Packate com.micky.commonproject.data.api.response * @Description * @Author Micky Liu * @Email [e-mail] * @Date 2015-12-21 16:39 * @Version 1.0 */public class GetIpInfoResponse extends BaseResponse {    public IpInfo data;}

4、请求数据并显示

package com.micky.retrofitrxandroiddagger2;import android.os.Bundle;import android.support.design.widget.FloatingActionButton;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.Toolbar;import android.view.View;import android.view.Menu;import android.view.MenuItem;import android.widget.ProgressBar;import android.widget.TextView;import android.widget.Toast;import com.micky.retrofitrxandroiddagger2.common.utils.CrashHandler;import com.micky.retrofitrxandroiddagger2.data.api.ApiService;import com.micky.retrofitrxandroiddagger2.data.api.response.GetIpInfoResponse;import retrofit.Call;import retrofit.Callback;import retrofit.GsonConverterFactory;import retrofit.Response;import retrofit.Retrofit;import retrofit.RxJavaCallAdapterFactory;import rx.Subscriber;import rx.android.schedulers.AndroidSchedulers;import rx.functions.Action1;import rx.schedulers.Schedulers;/** * @Project retrofitrxandroiddagger2 * @Packate com.micky.retrofitrxandroiddagger2 * @Description * @Author Micky Liu * @Email [e-mail] * @Date 2015-12-21 17:35 * @Version 1.0 */public class MainActivity extends AppCompatActivity {    private static final String ENDPOINT = "http://ip.taobao.com";    private TextView mTvContent;    private ProgressBar mProgressBar;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);        setSupportActionBar(toolbar);        mTvContent = (TextView) findViewById(R.id.tv_content);        mProgressBar = (ProgressBar) findViewById(R.id.progress_bar);        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);        fab.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View view) {                Retrofit retrofit = new Retrofit.Builder()                        .baseUrl(ENDPOINT)                        .addConverterFactory(GsonConverterFactory.create())                        .build();                ApiService apiService = retrofit.create(ApiService.class);                mProgressBar.setVisibility(View.VISIBLE);                Call<GetIpInfoResponse> call = apiService.getIpInfo("63.223.108.42");                call.enqueue(new Callback<GetIpInfoResponse>() {                    @Override                    public void onResponse(Response<GetIpInfoResponse> response, Retrofit retrofit) {                        mProgressBar.setVisibility(View.GONE);                        GetIpInfoResponse getIpInfoResponse = response.body();                        mTvContent.setText(getIpInfoResponse.data.country);                    }                    @Override                    public void onFailure(Throwable t) {                        mProgressBar.setVisibility(View.GONE);                        mTvContent.setText(t.getMessage());                    }                });            }        });    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.menu_main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }}

就这么简单，上述代码已经实现通过retrofit访问restful api获取数据并显示。