Android Download file from URL with DownloadManager

activity_layout

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

 android:id="@+id/sample_main_layout" 

 android:layout_width="match_parent" 

 android:layout_height="match_parent" 

 android:orientation="vertical">
    
    <Button 

 android:id="@+id/btnDownload" 

 android:layout_width="wrap_content" 

 android:layout_height="wrap_content" 

 android:layout_gravity="center_horizontal" 

 android:text="Start Download" />
</LinearLayout>

AndroidManifest

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

MainActivity

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    DownloadManager downloadManager;
    String _URL = "your URL";
    long refer;
    BroadcastReceiver downloadcomplete;
    BroadcastReceiver notificationClick;
    Button btnDownload;

    public void startdownload() {
        downloadManager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
        Uri uri = Uri.parse(_URL);
        DownloadManager.Request request = new DownloadManager.Request(uri);
        request.setDescription("My download").setTitle("Notification Title");
        request.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, "your filename");
        request.setVisibleInDownloadsUi(true);
        request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE);
        refer = downloadManager.enqueue(request);
        IntentFilter filter = new IntentFilter(DownloadManager.ACTION_NOTIFICATION_CLICKED);
        notificationClick = new BroadcastReceiver() {
            @Override 

              public void onReceive(Context context, Intent intent) {
                String extraID = DownloadManager.EXTRA_NOTIFICATION_CLICK_DOWNLOAD_IDS;
                long[] references = intent.getLongArrayExtra(extraID);
                for (long r : references) {
                    if (r == refer) {
                        // do something with download file                    }
                }
            }
        };
        registerReceiver(notificationClick, filter);

        IntentFilter intentFilter = new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE);
        downloadcomplete = new BroadcastReceiver() {
            @Override 

              public void onReceive(Context context, Intent intent) {
                long r = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
                if (refer == r) {
                    DownloadManager.Query query = new DownloadManager.Query();
                    query.setFilterById(r);
                    Cursor cursor = downloadManager.query(query);
                    cursor.moveToFirst();
                    //get status of the download 

                    int columnIndex = cursor.getColumnIndex(DownloadManager.COLUMN_STATUS);
                    int status = cursor.getInt(columnIndex);
                    int filenameIndex = cursor.getColumnIndex(DownloadManager.COLUMN_LOCAL_FILENAME);
                    String saveFilePath = cursor.getString(filenameIndex);
                    int columnReason = cursor.getColumnIndex(DownloadManager.COLUMN_REASON);
                    int reason = cursor.getInt(columnReason);
                    switch (status) {
                        case DownloadManager.STATUS_SUCCESSFUL:
                            Toast.makeText(getApplicationContext(), "STATUS_SUCCESSFUL", Toast.LENGTH_SHORT).show();
                            break;
                        case DownloadManager.STATUS_FAILED:
                            // do something                            break;
                        case DownloadManager.STATUS_PAUSED:
                            // do something                            break;
                        case DownloadManager.STATUS_PENDING:
                            // do something                            break;
                        case DownloadManager.STATUS_RUNNING:
                            // do something                            break;
                    }
                }
            }
        };
        registerReceiver(downloadcomplete, intentFilter);
    }

    @Override 

 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btnDownload = (Button) findViewById(R.id.btnDownload);
        btnDownload.setOnClickListener(this);
        // demo download file from URL
    }

    @Override 

 public void onClick(View v) {
        if (v == btnDownload)
            startdownload();
    }

    @Override 

 protected void onPause() {
        super.onPause();
        unregisterReceiver(downloadcomplete);
        unregisterReceiver(notificationClick);
    }
}