Android的Fragment如何从okhttp获取数据？_android 在fragment中爬取数据-优快云博客

本文介绍了在Android开发中如何使用OkHttp库在Fragment中进行GET和POST请求，通过创建一个Singleton工具类封装了OkHttp的请求方法，并提供了一个HttpResponseCallBack接口处理响应数据。遇到此类问题的开发者可以通过查看提供的项目代码来解决问题。

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最近开发某个Android项目:DateListThingsAnalyse-Android，其中用到了Fragment来展示数据，获取数据一直被卡住了。最后在StackOverflow找到了相关解决办法。建议还是去clone一下我的项目查看实际代码去体会用法。

okhttp工具类

https://github.com/square/okhttp
这里POST和GET方法都有

public class Singleton {
    private static Singleton INSTANCE = null;
    private Singleton() {};

    OkHttpClient client = new OkHttpClient();
    public static final MediaType JSON
            = MediaType.get("application/json; charset=utf-8");

    public static Singleton getInstance() {
        if (INSTANCE == null) {
            INSTANCE = new Singleton();
        }
        return(INSTANCE);
    }

    public void doGetRequest(String url, final HttpResponseCallBack responseCallBack) throws IOException {
        Request request = new Request.Builder()
                .url(url)
                .build();

        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                e.printStackTrace();
            }
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String strResponse = response.body().string();
                Log.v("getStream-strResponse",strResponse);
                try {
                    responseCallBack.getResponse(strResponse);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }


    public void doPostRequest(String url,String json, final HttpResponseCallBack responseCallBack) throws IOException {
        RequestBody body = RequestBody.create(json, JSON);
        Request request = new Request.Builder()
                .url(url)
                .post(body)
                .build();


        client.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                e.printStackTrace();
            }
            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String strResponse = response.body().string();
                Log.v("getStream-strResponse",strResponse);
                try {
                    responseCallBack.getResponse(strResponse);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }
}

接口

package info.emperinter.DateListThingsAnalyseAndroid.API;

import org.json.JSONException;

public interface HttpResponseCallBack {
    void getResponse(String response) throws JSONException;
}