This code snippet demostrates the usage of AsyncTask to perform HttpPut request asynchrously and avoiding NetworkOnMainThread exception in android

AsyncTask-NetworkOnMainThreadException.java

package samples.android;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;

import android.os.AsyncTask;
import android.util.Log;

public class AsyncHttpRequestManager extends AsyncTask<String, Boolean, String> {
	private final String serviceUrl = "http://MACHINE_IP_HERE/DemoCalculatorRestfulServices/resources/utility/";
	
	@Override
	protected String doInBackground(String... params) {
		try {
		DefaultHttpClient client = new DefaultHttpClient();
		HttpPut putRequest = new HttpPut(serviceUrl);
		putRequest.setHeader("Content-type", "text/plain");
		putRequest.setHeader("Accept", "text/plain");
	    	putRequest.setEntity(new StringEntity(params[0]));
	    	HttpResponse response = client.execute(putRequest);
	    	InputStream content = response.getEntity().getContent();
		BufferedReader buffer = new BufferedReader(new InputStreamReader(content));
		String result = "";
		String s = "";
		while ((s = buffer.readLine()) != null) {
			result += s;
		}
	    return result;
	    
		} 
		catch (UnsupportedEncodingException e) {
			Log.e("AsyncOperationFailed", e.getMessage());
			e.printStackTrace();
		} catch (ClientProtocolException e) {
			Log.e("AsyncOperationFailed", e.getMessage());
			e.printStackTrace();
		} catch (IOException e) {
			Log.e("AsyncOperationFailed", e.getMessage());
			e.printStackTrace();
		}
		return null;
	}
	
	protected void onPostExecute(String result) {
		Log.d("MESSAGE", result);
    }
}