Android default downloader to downaload files code sample

Permissions Required :

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

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

activity_main.xml :

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:layout_gravity="center"

    android:gravity="center"

    android:orientation="vertical" >



    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Download" />



    <Button

        android:id="@+id/button2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="show Download" />



</LinearLayout>

MainActivity.class :

package com.example.samppledefaultdownloader;

import android.app.Activity;
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.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity implements OnClickListener {
 private long enqueue;
 private DownloadManager dm;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  Button b = (Button) findViewById(R.id.button1);
  Button b1 = (Button) findViewById(R.id.button2);
  b.setOnClickListener(this);
  b1.setOnClickListener(this);
  dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);

  BroadcastReceiver receiver = new BroadcastReceiver() {
   @Override
   public void onReceive(Context context, Intent intent) {
    String action = intent.getAction();
    if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(action)) {
     long downloadId = intent.getLongExtra(
       DownloadManager.EXTRA_DOWNLOAD_ID, 0);
     Query query = new Query();
     query.setFilterById(enqueue);
     Cursor c = dm.query(query);
     if (c.moveToFirst()) {
      int columnIndex = c
        .getColumnIndex(DownloadManager.COLUMN_STATUS);
      if (DownloadManager.STATUS_SUCCESSFUL == c
        .getInt(columnIndex)) {
       String uriString = c.getString(c.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI));
       Log.i("123456", "Download successfull +" + Uri.parse(uriString).getPath());
      }
     }
    }
   }
  };

  registerReceiver(receiver, new IntentFilter(
    DownloadManager.ACTION_DOWNLOAD_COMPLETE));
 }

 @Override
 public void onClick(View v) {
  if (v.getId() == R.id.button1) {
   Request request = new Request(Uri.parse("http://upload.wikimedia.org/wikipedia/commons/b/b8/Charminar_sumeet_photography_3.JPG"));
   request.setDestinationInExternalPublicDir("/meher-samples/Download-example/", "charminar.png"); // enable this line to download in custom path.
   request.setTitle("charminar");
   enqueue = dm.enqueue(request);
  }
  else if (v.getId() == R.id.button2) {
   Intent i = new Intent();
   i.setAction(DownloadManager.ACTION_VIEW_DOWNLOADS);
   startActivity(i);
  }
 }
}