Download progress Bar absent in Notification when Downloading file inside Webview

Question

I"m able to Download file from WebView but It doesn't show me the progress bar in Notification panel. But If I go to the Download directory of Ext storage, I can see the file.

How can make Download progress bar visible. Any help would be greatly appreciated.

Here is the code from library to initiate download

webView.setDownloadListener(new DownloadListener() {
                    @Override
                    public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimeType, long contentLength) {
                        DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));

                        request.setMimeType(mimeType);
                        //------------------------COOKIE!!------------------------
                        String cookies = CookieManager.getInstance().getCookie(url);
                        request.addRequestHeader("cookie", cookies);
                        //------------------------COOKIE!!------------------------
                        request.addRequestHeader("User-Agent", userAgent);
                        request.setDescription("Downloading file...");
                        request.setTitle(URLUtil.guessFileName(url, contentDisposition, mimeType));
                        request.allowScanningByMediaScanner();
                        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                        request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, URLUtil.guessFileName(url, contentDisposition, mimeType));
                        DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
                        dm.enqueue(request);
                        Toast.makeText(getApplicationContext(), "Downloading File", Toast.LENGTH_LONG).show();
                    }
                });

and my manifest file is

<?xml version="1.0" encoding="utf-8"?>

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

<application
    android:allowBackup="true"
    android:icon="@mipmap/icon"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/icon"
    android:supportsRtl="true"
    android:theme="@style/Theme.AppCompat.NoActionBar">
    <activity
        android:name=".MainActivity"
        android:configChanges="orientation"
        android:screenOrientation="portrait"
        android:theme="@style/AppTheme.TransNav">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />


            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".UpdateDialog"
        android:theme="@style/Theme.AppCompat.Dialog" />

    <service android:name=".MyFirebaseMessagingService">
        <intent-filter>
            <action android:name="com.google.firebase.MESSAGING_EVENT" />
        </intent-filter>
    </service>
    <service android:name=".MyFirebaseInstanceIDService">
        <intent-filter>
            <action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
        </intent-filter>
    </service>
    <service
        android:name=".UpdateService"
        android:enabled="true"
        android:exported="true" />

</application>

Any help would be largely appreciated. And for the records , Download link are generated from Google drive

and my main activity file starts with:

public class MainActivity extends AppCompatActivity {

boolean doubleBackToExitPressed = false;
private TextView textView;
private BottomBar bottomBar;


@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_main);

    View decorView = getWindow().getDecorView();
    int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
    decorView.setSystemUiVisibility(uiOptions);

Answer 1

If you have already file downloaded then get this file from SDCard or Downloaded directory.

1. Read file from SDCard

Then open the file in default PDF viewer of the application see below

   public static void openPdfFileAsIntent(Context context, File file) {

    Intent target = new Intent(Intent.ACTION_VIEW);
    target.setDataAndType(Uri.fromFile(file), "application/pdf");
    target.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

    Intent intent = Intent.createChooser(target, "Open File");
    try {
        context.startActivity(intent);
    } catch (ActivityNotFoundException e) {

        Toast.makeText(context, "Please add PDF Viewer Application", Toast.LENGTH_LONG).show();
    }
}

Usage:

 openPdfFileAsIntent(MainActivity.this,file);