Question

URL中显示的内容

http://sspapi-dev.samsungrs.com/health

是

[{"dspName":"openrtb","status":[{"type":"BIDREQ","state":"UP","avgTime":37},{"type":"VIEWTRACK","state":"UP","avgTime":10}]}]

但是当我从Android应用程序中读取URL时，输出为

<html><head>    <title>MSG: Please wait while you are redirected</title>    <META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=iso-8859-1">    <META HTTP-EQUIV="CACHE-CONTROL" CONTENT="NO-CACHE">    <META HTTP-EQUIV="EXPIRES"CONTENT="0">  <META HTTP-EQUIV="PRAGMA" CONTENT="NO-CACHE">   <script language="JavaScript" type="text/JavaScript">       function onLoad()   {           window.location="http://182.16.0.1/userportal/?callerIP=182.16.11.24&requestURL=http%3A%2F%2Fsspapi-dev.samsungrs.com%2Fhealth";        }        </script></head><body onLoad="setTimeout('onLoad()', 1000);"><br><center>Please wait while you are redirected to the login page<br></center></body></html>

请告诉我我在做错什么。

这是我的代码。

MainActivity.java

import android.app.Activity;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

public class MainActivity extends Activity implements AsyncResponse {

    TextView t1;
    final String website = "http://sspapi-dev.samsungrs.com/health";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        t1 = findViewById(R.id.textview1);

        Viewdata v1 = new Viewdata();
        v1.delegate = this;
        v1.execute(website);
    }

    @Override
    public void processFinish(String output) {
        t1.setText(output);
    }
}

class Viewdata extends Urltask{
    public AsyncResponse delegate = null;

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
    }

    @Override
    protected void onPostExecute(String dataModels) {
        super.onPostExecute(dataModels);

        delegate.processFinish(dataModels);
    }
}

JSONhelper.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class JSONhelper{

    HttpURLConnection connection;
    String data;

    public String getdatafromurl(String url){
        String result = new String();
        try{
            URL url1 = new URL(url);

            connection = (HttpURLConnection) url1.openConnection();
            connection.connect();
            InputStream inputStream = connection.getInputStream();

            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream));
            String line = "";
            StringBuffer buffer = new StringBuffer();

            while ((line = reader.readLine()) != null){
                buffer.append(line);
            }

            result = buffer.toString();

        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }
}

AsyncResponse.java

public interface AsyncResponse {
    void processFinish(String output);
}

Ultask.java

import android.os.AsyncTask;

abstract class Urltask extends AsyncTask<String, String, String> {

    @Override
    protected String doInBackground(String... params) {

        JSONhelper jsonhelper = new JSONhelper();
        String data = jsonhelper.getdatafromurl(params[0]);

        return data;
    }
}

顺便说一句，似乎在API 22（Android Lollipop）中已弃用DefaultHttpClient软件包及其相应功能，并已从API 23（Android Marshmallow）中删除了它。利用AsyncTask似乎是它的替代方法之一。但是，还有其他可用的替代方法，它们与旧的DefaultHttpClient软件包及其相应功能本身的方式密切相关吗？

Answer 1

package com.example.sample;

import android.annotation.SuppressLint;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;

import java.io.IOException;

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;


public class MainActivity2 extends AppCompatActivity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        loadContent();
    }

    public static String GET(OkHttpClient client, String url) throws IOException {
        Request request = new Request.Builder()
                .url(url)
                .build();
        Response response = client.newCall(request).execute();
        return response.body().string();
    }

    @SuppressLint("StaticFieldLeak")
    private void loadContent() {
        new AsyncTask<String, Void, String>() {
            @Override
            protected String doInBackground(String... params) {
                OkHttpClient client = new OkHttpClient();
                String response = "";
                try {
                    response = GET(client, "http://sspapi-dev.samsungrs.com/health");
                    //Parse the response string here

                } catch (IOException e) {
                    e.printStackTrace();
                }
                return response;
            }

            @Override
            protected void onPostExecute(String s) {
                super.onPostExecute(s);
                Log.e("Response", s);
            }
        }.execute();
    }
}

E /响应： [{“ dspName”：“ openrtb”，“状态”：[{“ type”：“ BIDREQ”，“ state”：“ UP”，“ avgTime”：37}，{“ type”：“ VIEWTRACK”，“状态“：” UP“，” avgTime“：10}]}]

在gradle中添加此单位偏差

compile 'com.squareup.okhttp3:okhttp:3.12.0'

Android / HTTP GET无法正确读取REST API

1 个答案: