package com.example.downmanager;

 import android.support.v7.app.ActionBarActivity;
 import android.app.DownloadManager;
 import android.app.DownloadManager.Query;
 import android.app.DownloadManager.Request;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.database.Cursor;
 //import android.app.DownloadManager.Request;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Environment;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.EditText;
 import android.widget.TextView;

 public class MainActivity extends ActionBarActivity {

    DownloadManager dManager;
    TextView tvMessage;
    EditText urlInput;
    long did;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // Get DownloadManager instance
        dManager=(DownloadManager)this.getSystemService(Context.DOWNLOAD_SERVICE);
        tvMessage=(TextView)findViewById(R.id.txtmessage);
        urlInput=(EditText)findViewById(R.id.txturl);
    }

    public void downloadFile(View view){

        String urlString=urlInput.getText().toString();
        if(!urlString.equals("")){
            try{
                // Get file name from the url
                String fileName=urlString.substring(urlString.lastIndexOf("/")+1);
                // Create Download Request object
                DownloadManager.Request request=new DownloadManager.Request(Uri.parse((urlString)));
                // Display download progress and status message in notification bar
                request.setNotificationVisibility(Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                // Set description to display in notification
                request.setDescription("Download "+fileName+" from "+ urlString);
                // Set title
                request.setTitle("DownloadManager");
                // Set destination location for the downloaded file
                request.setDestinationUri(Uri.parse("file://"+Environment.getExternalStorageDirectory()+"/"+fileName));
                // Download the file if the Download manager is ready
                did=dManager.enqueue(request);

            }catch(Exception e){}

        }


    }
    // BroadcastReceiver to receive intent broadcast by DownloadManager
    private BroadcastReceiver downloadReceiver = new BroadcastReceiver() {

         @Override
         public void onReceive(Context arg0, Intent arg1) {
          // TODO Auto-generated method stub
             Query q = new Query();
             q.setFilterById(did);
             Cursor cursor = dManager.query(q);
             if(cursor.moveToFirst()){
                 String message="";
                  int status = cursor.getInt(cursor.getColumnIndex(DownloadManager.COLUMN_STATUS));
                  if(status==DownloadManager.STATUS_SUCCESSFUL){
                      message="Download successful";
                    }
                  else if(status==DownloadManager.STATUS_FAILED){
                      message="Download failed";
                        }
                  tvMessage.setText(message);
                    }


                }
        };
    protected void onResume(){
        super.onResume();
        // Register the receiver to receive an intent when download complete
        IntentFilter intentFilter= new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE);
        registerReceiver(downloadReceiver, intentFilter);
    }
    @Override
    protected void onPause() {
     // TODO Auto-generated method stub
     super.onPause();
     // Unregister the receiver
     unregisterReceiver(downloadReceiver);
    }

 }