perform Get from URL via HTTP connection - Android Network

Android examples for Network:HTTP Get

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Description

perform Get from URL via HTTP connection

Demo Code


//package com.java2s;
import android.os.Build;
import android.util.Log;
import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;

public class Main {
    private static final String TAG = "WebHelper";

    public static String performGet(String urlString) throws IOException {
        disableConnectionReuseIfNecessary();
        HttpURLConnection urlConnection = null;
        ByteArrayOutputStream out = null;
        InputStream in = null;//from   w w w  .java 2s .co  m

        try {
            URL url = new URL(urlString);
            urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setReadTimeout(10000);
            urlConnection.setConnectTimeout(15000);
            urlConnection.connect();
            int statusCode = urlConnection.getResponseCode();
            if (statusCode != HttpURLConnection.HTTP_OK)
                throw new IOException("Expected HTTP 200, got status code "
                        + statusCode);

            in = new BufferedInputStream(urlConnection.getInputStream());
            out = new ByteArrayOutputStream();

            int b;
            while ((b = in.read()) != -1) {
                out.write(b);
            }

            return out.toString();
        } finally {
            if (urlConnection != null) {
                urlConnection.disconnect();
            }
            if (out != null) {
                try {
                    out.close();
                } catch (final IOException e) {
                    Log.e(TAG, "Error in performGet." + e);
                }
            }
            if (in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    Log.e(TAG, "Error in performGet." + e);
                }
            }
        }
    }

    private static void disableConnectionReuseIfNecessary() {
        // HTTP connection reuse which was buggy pre-froyo
        if (hasHttpConnectionBug()) {
            System.setProperty("http.keepAlive", "false");
        }
    }

    private static boolean hasHttpConnectionBug() {
        return Build.VERSION.SDK_INT < Build.VERSION_CODES.FROYO;
    }
}

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