saveWeb

package com.example.saveweb3;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import org.apache.http.HttpStatus;

import android.support.v7.app.ActionBarActivity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity {

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

        TextView myTextView = (TextView) findViewById(R.id.helloW);
        new Download().execute();
        myTextView.setText("Done");
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

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

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

         try {
          File SDCardRoot = Environment.getExternalStorageDirectory();
          String filename= "effortback.txt";
          File file = new File(SDCardRoot + "/",filename);

          file.createNewFile();
          FileOutputStream fileOutput = new FileOutputStream(file);

          URL url = new URL ("http://www.example.com/index.html");
          HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
          urlConnection.setRequestMethod("GET");
          urlConnection.setDoOutput(false);
          urlConnection.connect();

          InputStream inputStream;
          int status = urlConnection.getResponseCode();

          if(status >= HttpStatus.SC_BAD_REQUEST)
              inputStream = urlConnection.getErrorStream();
          else
              inputStream = urlConnection.getInputStream();


          int totalSize = urlConnection.getContentLength();
          int downloadedSize = 0;

          byte[] buffer = new byte[2048];
          int bufferLength = 0;

          while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
           fileOutput.write(buffer, 0, bufferLength);
           downloadedSize += bufferLength;
          }
          fileOutput.close();
          if(downloadedSize==totalSize) {
        }

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

        return null;
    }

}