Develop Reference

Getting error toast message on target application when using intent with action_view

I have webview which we have php application loaded. the application lists item which the user selects. when a list is selected. it does a redirect with a file path from the server which is captured using the below code.
1.get the file name and extension from the url and use it too create a new file which we will use it for writing outputstream to it.
2. call the downloadFile() method to read the file
3. call the ShoWeDrawings() passing the filename to use it to read the file and pass it to open it using intent action_view with another app.
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// This is my web site, so do not override; let my WebView load the page
if(url.contains("Files") ) {
String filename = url.substring(url.lastIndexOf('/') +1);
String extStorageDirectory = getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS) + "/EASM";
File folder = new File(extStorageDirectory);
if (!folder.exists()) {
folder.mkdir();
}
File file = new File(folder, filename);
try {
file.createNewFile();
} catch (IOException e1) {
e1.printStackTrace();
}
Downloader.DownloadFile( url,file);
ShoWeDrawings(filename);
return true;
}
return false;
}
download class
public class Downloader {
private static Context context;
// public Context context ;
public static void DownloadFile(String fileURL, File directory){
try{
FileOutputStream f = new FileOutputStream(directory);
URL u = new URL(fileURL);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(false);
c.setConnectTimeout(10000);
c.setReadTimeout(10000);
c.connect();
int status = c.getResponseCode();
// InputStream in = c.getErrorStream();
InputStream in = c.getInputStream();
// c.getErrorStream();
byte[] buffer = new byte[4096];
int len1 = 0;
while ((len1 = in.read(buffer)) > 0) {
f.write(buffer, 0, len1);
}
f.close();
in.close();
// Toast.makeText(context.getApplicationContext(), "A new file is downloaded successfully", Toast.LENGTH_SHORT).show();
}
catch (Exception e) {
e.printStackTrace();
}
}
}
ShoWeDrawings method
private void ShoWeDrawings(String filename) {
File file = new File( getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS)+"/EASM/"+filename);
// Uri uri = Uri.fromFile(file);
try {
Intent mIntent = new Intent(Intent.ACTION_VIEW);
// mIntent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, Uri.fromFile(file));
// mIntent.putExtra(Intent.EXTRA_STREAM,Uri.fromFile(file));
mIntent.setDataAndType(Uri.fromFile(file), "application/octet-stream");
mIntent.setPackage("com.solidworks.eDrawingsAndroid");
mIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
// Intent.createChooser(mIntent, "Choose Application");
startActivity(mIntent);
}
catch (Exception e)
{
e.printStackTrace();
}
}
now the problem comes with the opening of the file using the targeted app. i get a toast error message. Im not sure if its due to permissions or its the app that has problems. By the way i have upgraded to android 11 and i cant even view data/ folder on the tablet. i can only see the files via pc. The error message that im getting is - filename:error copying file to documents folder see picture below.
I tried to change the code and restarting the tablet thinking it might have been the updates that i pushed.

How to download a pdf file from a php powered website with URL of kind http://myurl.com/file.php/...../requireddownload.pdf

I have tried out many ways like using async task and default download manager, but, I ended with downloading a file (I believe that it is downloading file. php instead of the requireddownload.pdf file), which is not the required file. However the name and extension of downloaded file is the requrieddownload.pdf.
Thankyou in advance.

First step declaring persmissions in AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
Create a downloader class
public class Downloader {
public static void DownloadFile(String fileURL, File directory) {
try {
FileOutputStream f = new FileOutputStream(directory);
URL u = new URL(fileURL);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
InputStream in = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = in.read(buffer)) > 0) {
f.write(buffer, 0, len1);
}
f.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
Finally creating an activity which downloads the PDF file from internet,
public class PDFFromServerActivity extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
String extStorageDirectory = Environment.getExternalStorageDirectory()
.toString();
File folder = new File(extStorageDirectory, "pdf");
folder.mkdir();
File file = new File(folder, "Read.pdf");
try {
file.createNewFile();
} catch (IOException e1) {
e1.printStackTrace();
}
Downloader.DownloadFile("http://www.nmu.ac.in/ejournals/aspx/courselist.pdf", file);
showPdf();
}
public void showPdf()
{
File file = new File(Environment.getExternalStorageDirectory()+"/pdf/Read.pdf");
PackageManager packageManager = getPackageManager();
Intent testIntent = new Intent(Intent.ACTION_VIEW);
testIntent.setType("application/pdf");
List list = packageManager.queryIntentActivities(testIntent, PackageManager.MATCH_DEFAULT_ONLY);
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(file);
intent.setDataAndType(uri, "application/pdf");
startActivity(intent);
}
}

Opening PDF from external URL says "Open File: No apps can perform this action"

I am trying to open PDF files from external URL. The code is the next:
private void cargaPdf(Uri url){
//File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath() +"/"+ filename);
Intent target = new Intent(Intent.ACTION_VIEW);
target.setDataAndType(url,"application/pdf");
target.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
Intent intent = Intent.createChooser(target, "Open File");
try {
startActivity(intent);
} catch (ActivityNotFoundException e) {
// Instruct the user to install a PDF reader here, or something
}
}
I have installed adobe and google PDF viewer but when i push the buttom that calls "cargaPdf(Uri url)" function with this url(as you can see is a pdf file):
Uri.parse(https://dl.dropboxusercontent.com/s/oulzgpgnq2ca1ly/KorfbalSpa.pdf?dl=0);
It appears in the screen in spanish "Open File Ninguna aplicacion puede realizar esta accion" or english "Open file No apps can perform this action". What happen?
Edit 1: Ok, now i know that i have to download the file to see it, so, i did this code in the activity:
public void cargaDescripcion(View view){
Log.d("CargaDescripcion", "Antes del directorio");
String extStorageDirectory = Environment.getExternalStorageDirectory()
.toString();
File folder = new File(extStorageDirectory, "Mypdf");
folder.mkdir();
File file = new File(folder, "Read.pdf");
try {
file.createNewFile();
Log.d("CargaDescripcion", "File creado");
} catch (IOException e1) {
e1.printStackTrace();
}
Downloader.DownloadFile(deporte.getUrlDescEs(), file);
Log.d("CargaDescripcion", "Despues de descargarlo");
showPdf();
//folder.delete();
}
public void showPdf()
{
Log.d("showPdf", "Entramos en show pdf");
File file = new File(Environment.getExternalStorageDirectory()+"/Mypdf/Read.pdf");
PackageManager packageManager = getPackageManager();
Intent testIntent = new Intent(Intent.ACTION_VIEW);
testIntent.setType("application/pdf");
List list = packageManager.queryIntentActivities(testIntent, PackageManager.MATCH_DEFAULT_ONLY);
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(file);
intent.setDataAndType(uri, "application/pdf");
startActivity(intent);
//file.delete();
}
And this class for download the pdf:
public class Downloader {
public static void DownloadFile(String fileURL, File directory) {
try {
FileOutputStream f = new FileOutputStream(directory);
URL u = new URL(fileURL);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
InputStream in = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = in.read(buffer)) > 0) {
f.write(buffer, 0, len1);
}
f.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
I got it from here Opening pdf file from server using android intent
Edit 2: Now this is the code which download and shows the file:
public void cargaDescripcion(View view){
download(deporte.getUrlDescEs());
showPdf();
//folder.delete();
}
public void download(String url)
{
new DownloadFile().execute(url, "read.pdf");
}
public void showPdf()
{
File pdfFile = new File(Environment.getExternalStorageDirectory() + "/Mypdf/" + "read.pdf"); // -> filename = maven.pdf
Uri path = Uri.fromFile(pdfFile);
Intent pdfIntent = new Intent(Intent.ACTION_VIEW);
pdfIntent.setDataAndType(path, "application/pdf");
pdfIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
try{
startActivity(pdfIntent);
}catch(ActivityNotFoundException e){
Toast.makeText(SelectedSportActivity.this, "No Application available to view PDF", Toast.LENGTH_SHORT).show();
}
}
private class DownloadFile extends AsyncTask<String, Void, Void> {
#Override
protected Void doInBackground(String... strings) {
String fileUrl = strings[0]; // -> url del archivo
String fileName = strings[1]; // -> nombre del archivo.pdf
String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
File folder = new File(extStorageDirectory, "Mypdf");
folder.mkdir();
File pdfFile = new File(folder, fileName);
try{
pdfFile.createNewFile();
}catch (IOException e){
e.printStackTrace();
}
Downloader.downloadFile(fileUrl, pdfFile);
return null;
}
}
However, the file system is not created by app and file is not downloaded before the app arrives to the next point, that it is "show". So, the file does not exists when the app looks for it.
Edit 3: to SOLVE the show problem i used onPostExecute of asynctask method:
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
showPdf();
}

Use this code, this works for me for local file.
resumePdfFile is file path, where your file is saved.
private void openPDF(String resumePdfFile) {
//file should contain path of pdf file
Uri path = Uri.fromFile(resumePdfFile);
Log.e("create pdf uri path==>", "" + path);
try {
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(path, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
finish();
} catch (ActivityNotFoundException e) {
Toast.makeText(getApplicationContext(),
"There is no any PDF Viewer",
Toast.LENGTH_SHORT).show();
finish();
}
}
You can view or download the pdf files by two ways i.e by opening it in device default browser or in the webview by embedding it in your app.
To open the pdf in browser,
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(pdf_url));
startActivity(browserIntent);
To open in webview,
Webview webView = (WebView) findViewById(R.id.webView1);
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl(pdf_url);

Download pdf from Url and save it to sd card

I have wrote this code for download pdf from url and file url is this-
String fileURL= "http://www.vivekananda.net/PDFBooks/History_of_India.pdf";
Code this
public static void DownloadFile(String fileURL, File directory) {
try {
FileOutputStream f = new FileOutputStream(directory);
URL u = new URL(fileURL);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.getResponseCode();
c.connect();
InputStream in = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = in.read(buffer)) > 0) {
f.write(buffer, 0, len1);
}
f.close();
} catch (Exception e) {
e.printStackTrace();
}
}
but this shows file not found exception with response code 405.I dont know why this happened.Please help..!!
This is my code where i had create file in sd card-
Code this
public void createPdfFile(){
String extStorageDirectory = Environment.getExternalStorageDirectory()
.toString();
File folder = new File(extStorageDirectory, "pdf");
folder.mkdir();
file = new File(folder, "storrage_data.pdf");
try {
file.createNewFile();
} catch (IOException e1) {
e1.printStackTrace();
}
}`
After this i am calling download method in thread like this from onResume(); beacuse from onCreate it will give error "Network On Main Thread".where i am wrong now i don't konw :(
Code this
public void downloadFile(){
new Thread(new Runnable() {
#Override
public void run() {
Downloader.DownloadFile(url, file);
showPdf();
}
}).start();
}

The possible reason is the folder in which you want to does not exist. First check if it exist. Create it if not. Then create fileoutputstream and write to it.

I suggest you use the DownloadManager. There are too many problems that can arise during download to handle all of them yourself. Just think of temporary loss of connectivity in the middle of download...
Below is some code I pulled out of my app and slightly modified to get rid of parts you don't need.
public void downloadAndOpenPdf(String url,final File file) {
if(!file.isFile()) {
DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
DownloadManager.Request req = new DownloadManager.Request(Uri.parse(url));
req.setDestinationUri(Uri.fromFile(file));
req.setTitle("Some title");
BroadcastReceiver receiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
unregisterReceiver(this);
if (file.exists()) {
openPdfDocument(file);
}
}
};
registerReceiver(receiver, new IntentFilter(
DownloadManager.ACTION_DOWNLOAD_COMPLETE));
dm.enqueue(req);
Toast.makeText(this, "Download started", Toast.LENGTH_SHORT).show();
}
else {
openPdfDocument(file);
}
}
public boolean openPdfDocument(File file) {
Intent target = new Intent(Intent.ACTION_VIEW);
target.setDataAndType(Uri.fromFile(file), "application/pdf");
target.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
try {
startActivity(target);
return true;
} catch (ActivityNotFoundException e) {
Toast.makeText(this,"No PDF reader found",Toast.LENGTH_LONG).show();
return false;
}
}

Your code is correct. Now you need to download your pdf file to External storage or wherever you want to download and save it.

Delete this code and try again.
//c.setRequestMethod("GET");
//c.setDoOutput(true);
//c.getResponseCode();
//c.connect();
I think URL.openConnection() has description of connection already, so c.connect() isn't necessary.

How can I open pdf in my webview using google Docs? (Suddenly it's not work)

Not long age, I can open pdf in my webview using below my code.
view.loadUrl("https://docs.google.com/gview?embedded=true&url=" + str);
But suddenly it's not work.
I don't know the reason.
How can I open pdf in my webview??

Create a downloader class
public class Downloader {
public static void DownloadFile(String fileURL, File directory) {
try {
FileOutputStream f = new FileOutputStream(directory);
URL u = new URL(fileURL);
HttpURLConnection c = (HttpURLConnection) u.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
InputStream in = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = in.read(buffer)) > 0) {
f.write(buffer, 0, len1);
}
f.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
In your activity after setContentView(R.layout.main);write these lines
String extStorageDirectory = Environment.getExternalStorageDirectory()
.toString();
File folder = new File(extStorageDirectory, "pdf");
folder.mkdir();
File file = new File(folder, "Read.pdf");
try {
file.createNewFile();
} catch (IOException e1) {
e1.printStackTrace();
}
Downloader.DownloadFile("URL", file);
showPdf();
Write this method
public void showPdf()
{
File file = new File(Environment.getExternalStorageDirectory()+"/Mypdf/Read.pdf");
PackageManager packageManager = getPackageManager();
Intent testIntent = new Intent(Intent.ACTION_VIEW);
testIntent.setType("application/pdf");
List list = packageManager.queryIntentActivities(testIntent, PackageManager.MATCH_DEFAULT_ONLY);
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(file);
intent.setDataAndType(uri, "application/pdf");
startActivity(intent);
}
add these permissions in your AndroidManifest.xml
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

I think this question is repeated, I get the solution
1) Type:
webView.loadUrl("https://docs.google.com/gview?url="+pdfUrl.get(position).url);
2) Don't forget to set webview client
webView.setWebViewClient(new WebViewClient() {
ProgressDialog progressDialog;
//If you will not use this method url links are opeen in new brower not in webview
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return true;
}
#Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
if (progressDialog == null) {
// in standard case YourActivity.this
progressDialog = new ProgressDialog(getActivity());
progressDialog.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
progressDialog.setMessage("Loading...");
progressDialog.show();
}
}
public void onPageFinished(WebView view, String url) {
if (progressDialog != null && progressDialog.isShowing()) {
progressDialog.dismiss();
progressDialog = null;
}
}
});