网络访问框架经过了从使用最原始的AsyncTask构建简单的网络访问框架(甚至不能称为框架),后来使用开源的android-async-http库,再到使用google发布的volley库,一直不懈的寻找更好的解决方案,到现在也没找到,不过据行业所说,Retrofit算是行业比较牛逼的开源请求框架了吧,也算找 到了一些更好的方案,在这里做些记录,也做共享。
下面是我们常用的mvp模式的运行模型:
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/RxAndroid
https://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/
为了书写 方便,便于实践,我们用下面的地址作为服务器请求地址:http://ip.taobao.com/service/getIpInfo.php?ip=21.22.11.33
接下来我们开始新建一个项目;
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;
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;
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;
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);
}
}