Android的HTTP GET请求 [英] Android Http Get Request

问题描述

我在Android开发的新手。我试图发送一个GET请求的URL。我写了下面的code。

I'm a newbie at android development. I'm trying to send a GET request to an URL. I wrote the below code.

public void searchProducts(View v) 
{
    //String txtSearchTerm = ((EditText)findViewById(R.id.txtsearch)).getText().toString();
    //String termCleaned = txtSearchTerm.replace(' ', '+').toString();
    AlertDialog alertMessage = new AlertDialog.Builder(this).create();
    alertMessage.setTitle("Loading");
    alertMessage.setMessage(GET("http://webkarinca.com/sample.json"));
    alertMessage.show(); 
} 
public static String GET(String url){
    InputStream inputStream = null;
    String result = "";
    try {

        HttpClient httpclient = new DefaultHttpClient();
        HttpResponse httpResponse = httpclient.execute(new HttpGet(url));
        inputStream = httpResponse.getEntity().getContent();
        if(inputStream != null)
        {
            result = convertInputStreamToString(inputStream);
        }
        else
        {
            result = "Did not work!";
        }

    } catch (Exception e) {
        Log.d("InputStream", e.getLocalizedMessage());
    }

    return result;
}
private static String convertInputStreamToString(InputStream inputStream) throws IOException{
    BufferedReader bufferedReader = new BufferedReader( new InputStreamReader(inputStream));
    String line = "";
    String result = "";
    while((line = bufferedReader.readLine()) != null)
        result += line;

    inputStream.close();
    return result;

}

我已经把类的进口头。他们在那里

I already put imports head of the class. There they are

import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONObject;

它不工作，并在问题部分它显示为警告

It doesn't work and at the Problems section it shows as a warning

该型HTTPGET是德precated
该类型的Htt presponse是德precated

The type HttpGet is deprecated The type HttpResponse is deprecated

推荐答案

试试这个code。这为我工作。

Try this code. This worked for me.

import java.io.IOException;
import java.io.UnsupportedEncodingException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;


public class ServerTest extends Activity {

    private String TAG = "test";
    private String url = "http://webkarinca.com/sample.json";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        new Download().execute();
    }


    public class Download extends AsyncTask<Void, Void, String>{

        @Override
        protected String doInBackground(Void... params) {
            String out = null;

            try {
                DefaultHttpClient httpClient = new DefaultHttpClient();

                final HttpParams httpParameters = httpClient.getParams();

                HttpConnectionParams.setConnectionTimeout(httpParameters, 15000);
                HttpConnectionParams.setSoTimeout(httpParameters, 15000);

                HttpGet httpPost = new HttpGet(url);

                HttpResponse httpResponse = httpClient.execute(httpPost);
                HttpEntity httpEntity = httpResponse.getEntity();

                out = EntityUtils.toString(httpEntity, HTTP.UTF_8);

            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            } catch (ClientProtocolException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }

            return out;
        }


        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            Log.e(TAG, result);
        }
    }
}

另外，还要确保你已经加入这个表现，

Also make sure you have added this to manifest,

<uses-permission android:name="android.permission.INTERNET" />

，并且确保您连接到互联网。

and also make sure you are connected to the internet.

这篇关于Android的HTTP GET请求的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！