Why Broadcast Receiver doesn't Call after download manager is completed?

Question

I'm setting download manager to download PDF file for server URL. file is download completely but Broadcast Receiver doesn't call to open file . I use AsyncTask and doInBackground class for downloading and set permission.INTERNET,permission.WRITE_EXTERNAL_STORAGE,permission.WRITE_INTERNAL_STORAGE ,permission.READ_EXTERNAL_STORAGE in manifest. i checked my directory in real device and PDF file is completely download without any crash .

in OnCreate

        registerReceiver(onComplete, filter);

in onClick Button

                    downloadPdf(v);
                } else {
                    requestStoragePermission(v);
                }

and also set onDestroy

    public void onDestroy() {
        super.onDestroy();
        unregisterReceiver(onComplete);
    }

and downloading file

        @Override
        protected Void doInBackground(String... strings) {
            String fileUrl = strings[0];
            String fileName = strings[1];
            String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
            File folder = new File(extStorageDirectory, DIRECTORY_PDF_NAME);
            if (!folder.exists()) {
                folder.mkdir();
            }
//            File pdfFile = new File(folder, fileName);
            file_download(fileUrl);
            return null;
        }

        public void file_download(String fileUrl) {

            File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + DIRECTORY_PDF_NAME + "/" + "au.pdf");
            if (file.exists()) {
                Intent target = new Intent(Intent.ACTION_VIEW);
                target.setDataAndType(Uri.fromFile(file), "application/pdf");
                target.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);

                Intent intent = Intent.createChooser(target, "انتخاب برنامه");
                try {
                    startActivity(intent);
                } catch (ActivityNotFoundException e) {
                    Toast.makeText(LoginActivity.this, "عدم موفقیت در نمایش فایل", Toast.LENGTH_SHORT).show();
                }
            } else {
                mgr = (DownloadManager) LoginActivity.this.getSystemService(Context.DOWNLOAD_SERVICE);
                Uri downloadUri = Uri.parse(fileUrl);
                DownloadManager.Request request = new DownloadManager.Request(
                        downloadUri);
                request.setAllowedNetworkTypes(
                        DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE)
                        .setAllowedOverRoaming(false)
                        .setTitle("راهنمای ثبت نام")
                        .setDescription("  در حال دانلود..." + "فایل راهنمای ثبت نام")
                        .setDestinationInExternalPublicDir("/" + DIRECTORY_PDF_NAME + "/", "au.pdf");

                try {
                    refid = mgr.enqueue(request);
                    Log.d(TAG, "Checking download status for id: " + refid);

                } catch (ActivityNotFoundException e) {
                    Toast.makeText(LoginActivity.this, "عدم موفقیت در دانلود فایل", Toast.LENGTH_SHORT).show();
                }
            }
        }
    }

and at the end

        public void onReceive(Context ctxt, Intent intent) {

            File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + DIRECTORY_PDF_NAME + "/" + "au.pdf");
            Intent target = new Intent(Intent.ACTION_VIEW);
            target.setDataAndType(Uri.fromFile(file), "application/pdf");
            target.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
            Intent intentPdf = Intent.createChooser(target, "انتخاب برنامه");
            try {
                startActivity(intentPdf);
            } catch (ActivityNotFoundException e) {
            }
        }

Answer 1

I solve this problem with this solution I create a a PDF Class and transfer my downloading code in it.

public Pdf(Context context, String url, String fileName) {
    this.context = context;
    this.url = url;
    this.fileName = fileName;
    init();
}


private void init() {
    downloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
    context.registerReceiver(onComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
    Download_Uri = Uri.parse(url);
}

public void checkAndDownload() {
    if (isStoragePermissionGranted()) {
        if (isExistPdfFile()) {
            openGeneratedPDF();
        }else{
            downloadPdf();
        }

    }
}

public void permissionGranted(int[] grantResults) {
    if(grantResults[0]== PackageManager.PERMISSION_GRANTED){
        downloadPdf();
    }
}

private boolean isStoragePermissionGranted() {
    if (Build.VERSION.SDK_INT >= 23) {
        if (context.checkSelfPermission(android.Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
            return true;
        } else {
            ActivityCompat.requestPermissions((Activity) context, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
            return false;
        }
    } else {
        return true;
    }
}


public BroadcastReceiver onComplete = new BroadcastReceiver() {
    public void onReceive(Context ctxt, Intent intent) {
        isCompeleted = true;
        openGeneratedPDF();
    }

};

private boolean isExistPdfFile() {
    File target = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
    file = new File(target, DIRECTORY_PDF_NAME + "/" + fileName + ".pdf");
    if (file.exists()) {
        return true;
    }else{
        return false;
    }
}

private void openGeneratedPDF() {
    if (isExistPdfFile()) {
        Intent intent = new Intent(Intent.ACTION_VIEW);
        Uri uri = FileProvider.getUriForFile(context, context.getPackageName() + ".fileprovider", file);
        Log.e("uri is",uri.toString());
        intent.setDataAndType(uri, "application/pdf");
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        try {
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            context.startActivity(intent);
        } catch (ActivityNotFoundException e) {
            Toast.makeText(context, "برنامه‌ای برای نمایش فایل PDF وجود ندارد", Toast.LENGTH_LONG).show();
        }
    }else {
        Toast.makeText(context,"فایل مورد نظر یافت نشد",Toast.LENGTH_LONG).show();
    }
}

private void downloadPdf() {
    DownloadManager.Request request = new DownloadManager.Request(Download_Uri);
    request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE);
    request.setAllowedOverRoaming(true);
    request.setVisibleInDownloadsUi(true);
    request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, Constant.DIRECTORY_PDF_NAME + "/" + fileName + ".pdf");
    refid = downloadManager.enqueue(request);
    Log.e("OUT", "" + refid);
}

public boolean getIsCompeleted() {
    return isCompeleted;
}

and call it in my requirement Activity ,also i use file provider such as

  Uri uri = FileProvider.getUriForFile(context, context.getPackageName() + ".fileprovider", file);