Develop Reference

How to download the files in specific folder in internal storage

I am trying to create a separate folder in internal storage of a phone for an app to download files on it. But the folder is not created in the phone. What is the reason? Also I have another issue in my app that is photos are not downloaded when I click thee download button.
Here is the download function
public void download() {
for (MediaModel item : Items) {
if (item.isSelected) {
Log.d("check", "download");
final String url = item.getFullDownloadURL();
BaseDownloadTask task = FileDownloader.getImpl().create(url);
task.setListener(mFileDownloadListener)
.setPath(Environment.getDataDirectory() + "/" + Constants.STORED_FOLDER, true)
.setAutoRetryTimes(1)
.setCallbackProgressTimes(0)
.asInQueueTask()
.enqueue();
if (FileDownloader.getImpl().start(mFileDownloadListener, true)) {
item.setTaskId(task.getId());
item.setStatus(ItemStatus.DOWNLOADING);
Logging.e(TAG, "start download task: " + task.getId());
} else {
item.setTaskId(task.getId());
item.setStatus(ItemStatus.NORMAL);
Logging.e(TAG, "error download task: " + task.getId());
}
}
}
}

In Android studio to use internal Storage First of all add permission in manifest
Like this:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
then to make new directory in internal storage use this line of code:
File sdCardRoot = new File(Environment.getExternalStorageDirectory(), "MyProfile");
if (!sdCardRoot.exists()) {
sdCardRoot.mkdirs();
}
Log.e("check_path", "" + sdCardRoot.getAbsolutePath());
This is my full code:
In this code check directory is exist or not if directory is not exist then create directory
and use asyntask to download images from url
In this example i have use Java Language
Code
MyAsyncTasks asyncTasks = new MyAsyncTasks();
asyncTasks.execute(Imageurl);
and AsyncClass:
class MyAsyncTasks extends AsyncTask<String, String, String> {
File sdCardRoot;
#Override
protected String doInBackground(String... strings) {
HttpURLConnection urlConnection = null;
try {
URL url = new URL(strings[0]);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
sdCardRoot = new File(Environment.getExternalStorageDirectory(), "MyProfile");
if (!sdCardRoot.exists()) {
sdCardRoot.mkdirs();
}
Log.e("check_path", "" + sdCardRoot.getAbsolutePath());
String fileName =
strings[0].substring(strings[0].lastIndexOf('/') + 1, strings[0].length());
Log.e("dfsdsjhgdjh", "" + fileName);
File imgFile =
new File(sdCardRoot, fileName);
if (!sdCardRoot.exists()) {
imgFile.createNewFile();
}
InputStream inputStream = urlConnection.getInputStream();
int totalSize = urlConnection.getContentLength();
FileOutputStream outPut = new FileOutputStream(imgFile);
int downloadedSize = 0;
byte[] buffer = new byte[2024];
int bufferLength = 0;
while ((bufferLength = inputStream.read(buffer)) > 0) {
outPut.write(buffer, 0, bufferLength);
downloadedSize += bufferLength;
Log.e("Progress:", "downloadedSize:" + Math.abs(downloadedSize * 100 / totalSize));
}
Log.e("Progress:", "imgFile.getAbsolutePath():" + imgFile.getAbsolutePath());
Log.e(TAG, "check image path 2" + imgFile.getAbsolutePath());
mImageArray.add(imgFile.getAbsolutePath());
outPut.close();
} catch (IOException e) {
e.printStackTrace();
Log.e("checkException:-", "" + e);
}
return null;
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
imagecount++;
Log.e("check_count", "" + totalimagecount + "==" + imagecount);
if (totalimagecount == imagecount) {
pDialog.dismiss();
imagecount = 0;
}
Log.e("ffgnjkhjdh", "checkvalue checkvalue" + checkvalue);
}
}

Try This code:
private class DownloadingTask extends AsyncTask<Void, Void, Void> {
File apkStorage = null;
File outputFile = null;
#Override
protected void onPreExecute() {
super.onPreExecute();
progressDialog=new ProgressDialog(context);
progressDialog.setMessage("Downloading...");
progressDialog.show();
}
#Override
protected void onPostExecute(Void result) {
try {
if (outputFile != null) {
progressDialog.dismiss();
CDToast.makeText(context, context.getResources().getString(R.string.downloaded_successfully), CDToast.LENGTH_SHORT, CDToast.TYPE_SUCCESS).show();
Notification();
vibrateDevice(100);
} else {
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
}
}, 3000);
CDToast.makeText(context, context.getResources().getString(R.string.download_failed), CDToast.LENGTH_SHORT, CDToast.TYPE_ERROR).show();
}
} catch (Exception e) {
e.printStackTrace();
//Change button text if an exception occurs
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
}
}, 3000);
Log.e(TAG, "Download Failed with Exception - " + e.getLocalizedMessage());
}
super.onPostExecute(result);
}
#Override
protected Void doInBackground(Void... arg0) {
try {
URL url = new URL(downloadUrl);//Create Download URl
HttpURLConnection c = (HttpURLConnection) url.openConnection();//Open Url Connection
c.setRequestMethod("GET");//Set Request Method to "GET" since we are grtting data
c.connect();//connect the URL Connection
//If Connection response is not OK then show Logs
if (c.getResponseCode() != HttpURLConnection.HTTP_OK) {
Log.e(TAG, "Server returned HTTP " + c.getResponseCode()
+ " " + c.getResponseMessage());
}
//Get File if SD card is present
if (new CheckForSDCard().isSDCardPresent()) {
apkStorage = new File(
Environment.getExternalStorageDirectory() + "/"
+ "New_Folder_Name_Here");
} else
Toast.makeText(context, "Oops!! There is no SD Card.", Toast.LENGTH_SHORT).show();
//If File is not present create directory
if (!apkStorage.exists()) {
apkStorage.mkdir();
Log.e(TAG, "Directory Created.");
}
outputFile = new File(apkStorage, downloadFileName);//Create Output file in Main File
//Create New File if not present
if (!outputFile.exists()) {
outputFile.createNewFile();
Log.e(TAG, "File Created");
}
FileOutputStream fos = new FileOutputStream(outputFile);//Get OutputStream for NewFile Location
InputStream is = c.getInputStream();//Get InputStream for connection
byte[] buffer = new byte[1024];//Set buffer type
int len1 = 0;//init length
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);//Write new file
}
//Close all connection after doing task
fos.close();
is.close();
} catch (Exception e) {
//Read exception if something went wrong
e.printStackTrace();
outputFile = null;
Log.e(TAG, "Download Error Exception " + e.getMessage());
}
return null;
}
}
For Checking SD card :
public class CheckForSDCard {
//Check If SD Card is present or not method
public boolean isSDCardPresent() {
if (Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED)) {
return true;
}
return false;
}
}

For creating folder
String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Your Folder Name";
File folder = new File(path);
if (!folder.exists()) {
folder.mkdir();
}
also refer to this answer: https://stackoverflow.com/a/35471045/9060917
Update
public void download() {
for (MediaModel item : Items) {
if (item.isSelected) {
File file = new File(getFilesDir(),"Your directory name");
if(!file.exists()){
file.mkdir();
}
try{
Log.d("check", "download");
final String url = item.getFullDownloadURL();
BaseDownloadTask task = FileDownloader.getImpl().create(url);
task.setListener(mFileDownloadListener)
.setPath(file.getAbsolutePath(), true)
.setAutoRetryTimes(1)
.setCallbackProgressTimes(0)
.asInQueueTask()
.enqueue();
}catch (Exception e){
e.printStackTrace();
}
if (FileDownloader.getImpl().start(mFileDownloadListener, true)) {
item.setTaskId(task.getId());
item.setStatus(ItemStatus.DOWNLOADING);
Logging.e(TAG, "start download task: " + task.getId());
} else {
item.setTaskId(task.getId());
item.setStatus(ItemStatus.NORMAL);
Logging.e(TAG, "error download task: " + task.getId());
}
}
}
}
I hope you add these permissions in manifests
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
Update
When saving a file to internal storage, you can acquire the appropriate directory as a File by calling method
getFilesDir()
File directory = context.getFilesDir();
File file = new File(directory, filename);
Alternatively, you can call openFileOutput() to get a FileOutputStream that writes to a file in your internal directory. For example, here's how to write some text to a file:
String filename = "myfile";
String fileContents = "Hello world!";
FileOutputStream outputStream;
try {
outputStream = openFileOutput(filename, Context.MODE_PRIVATE);
outputStream.write(fileContents.getBytes());
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
More reference
https://developer.android.com/training/data-storage/files#java

pass the URL of the image you want to download in this method.
/*--Download Image in Storage--*/
public void downloadImage(String URL) {
final Long reference;
downloadManager = (DownloadManager) getActivity().getSystemService(Context.DOWNLOAD_SERVICE);
Uri uri = Uri.parse(URL);
DownloadManager.Request request = new DownloadManager.Request(uri);
request.setTitle("AppName");
request.setDestinationInExternalPublicDir(String.format("%s/%s", Environment.getExternalStorageDirectory(),
getString(R.string.app_name)), "FileName.jpg");
Log.i("myi", "downloadImage: " + request.setDestinationInExternalPublicDir(String.format("%s/%s", Environment.getExternalStorageDirectory(),
getString(R.string.app_name)), "FileName.jpg"));
request.setVisibleInDownloadsUi(true);
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
reference = downloadManager.enqueue(request);
Log.d("download", "Image Download : " + reference);
BroadcastReceiver onComplete = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
try {
Toast.makeText(this, "Image Downloaded Successfully ", Toast.LENGTH_LONG);
} catch (Exception e) {
}
}
};
getApplicationContext().registerReceiver(onComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
}

Add the required permissions to the AndroidManifest.xml file.
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
Add requestLegacyExternalStorage for the application.
<application
android:requestLegacyExternalStorage="true">
</application>
Add the following snippet to the MainActivity.java
File f = new File(Environment.getExternalStorageDirectory(), "My folder");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
try {
Files.createDirectory(Paths.get(f.getAbsolutePath()));
} catch (IOException e) {
e.printStackTrace();
Toast.makeText(getApplicationContext(), e.getLocalizedMessage(), Toast.LENGTH_LONG).show();
}
} else {
f.mkdir();
f.mkdirs();
Toast.makeText(getApplicationContext(), f.getPath(), Toast.LENGTH_LONG).show();
}
Now, the code to trigger the download would be something like:
String url="Here download Url paste";
DownloadManager downloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url.toString()));
request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE | DownloadManager.Request.NETWORK_WIFI);
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.allowScanningByMediaScanner();
request.setDestinationInExternalPublicDir("/My folder", fileName);
downloadManager.enqueue(request);

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);
}
}

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.

file.delete() from android internal storage return false

I have a method to download a image from url and save it in a folder at Internal storage
public void saveDynamicImage(String url,String fileName, String folderName) {
InputStream iStream;
BufferedInputStream buffInputStream;
ByteArrayBuffer byteArray = null;
try {
HttpGet httpGet = new HttpGet(url);
HttpClient httpClient = new DefaultHttpClient();
HttpResponse httpResponse = httpClient.execute(httpGet);
iStream = httpResponse.getEntity().getContent();
buffInputStream = new BufferedInputStream(iStream, 8 * 1024);
byteArray = new ByteArrayBuffer(50);
int current = 0;
while ((current = buffInputStream.read()) != -1) {
byteArray.append((byte) current);
}
} catch (ClientProtocolException e1) {
} catch (IOException e1) {
}
File dynamicImageDir = context.getDir(AppConstants.DYNAMIC_IMAGE, Context.MODE_PRIVATE);
File appNamefileDir = new File(dynamicImageDir, BaseActivity.appDataStore.getAppName());
appNamefileDir.mkdirs();
File controlNameDir = new File(appNamefileDir, folderName);
controlNameDir.mkdirs();
File file = new File(controlNameDir, fileName);
try {
FileOutputStream outputStream = new FileOutputStream(file);
outputStream.write(byteArray.toByteArray());
outputStream.close();
System.out.println("DynamicImage saving over!..");
} catch (FileNotFoundException e) {
} catch (IOException e) {
}
}
i want to delete the whole directory at a point of time. My method to delete entire directory is
public void deleteDynamicImage() throws NullPointerException,FileNotFoundException {
File rootDirectory = context.getDir(AppConstants.DYNAMIC_IMAGE, Context.MODE_WORLD_WRITEABLE);
boolean status = rootDirectory.delete();
Log.e("", "delete : "+status);
}
i am getting the status as 'false'. files are created and working fine. only problem in deletion. Is there any thing I am missing?

Is your file a directory?
If it's, you need to delete file in this folder first
this code is work well
public void deleteDirectory(File file) {
if( file.exists() ) {
if (file.isDirectory()) {
File[] files = file.listFiles();
for(int i=0; i<files.length; i++) {
if(files[i].isDirectory()) {
deleteDirectory(files[i]);
}
else {
files[i].delete();
}
}
}
file.delete();
}
}

To delete Directory use this:
public void DeleteRecursive(File fileOrDirectory) {
if (fileOrDirectory.isDirectory()) for (File child : fileOrDirectory.listFiles())
DeleteRecursive(child);
fileOrDirectory.delete();
}

How to delete File in Android:
public void deleteFile(String filePath){
if(filePath.startsWith("content://")){
ContentResolver contentResolver = getActivity().getContentResolver();
contentResolver.delete(Uri.parse(filePath), null, null);
}else {
File file = new File(filePath);
if(file.exists()) {
if (file.delete()) {
Log.e(TAG, "File deleted.");
}else {
Log.e(TAG, "Failed to delete file!");
}
}else {
Log.e(TAG, "File not exist!");
}
}
}
Important Note:
if you get file path from Uri [Don't use Uri.toString()] as it will return file path in file:/// format, in this case [new File(filePath)] will not work. So to get file path always use Uri.getPath().

You are trying to delete a directory. File.delete() works on directory only if this is empty

Android Web View not able to view PDF From Amazon Service Url

I am trying to display pdf file in android webview by calling amazon url. But it only shows white screen.Nothing to load.
When i use url other then amazon it shows pdf file in webview.
I have also tried this:
http://docs.google.com/gview?embedded=true&url=" + MYURL
I have also tried under write url as well: And works well.
http://www.durgasoft.com/Android%20Interview%20Questions.pdf
If any one have any suggestion please guide me.
Here is my code for your reference:
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setPluginState(PluginState.ON);
String url = Common.getPdfFromAmazon("52f3761d290c4.pdf");
webView.loadUrl(url);
Android Menifest.xml also give Internet Permission:
**<uses-permission android:name="android.permission.INTERNET" />**
i can also try this "http://docs.google.com/gview?embedded=true&url=" + url ;
Thank you.

For displaying a PDF from amazon web service you need to first download and store the PDF to your device and then open it through PDF reader/viewer application available on your device.
1>> Call DownloadFileAsync() to invoke download process and pass your amazon web service url.
new DownloadFileAsync().execute(url);
2>> Do the download PDF process in AsyncTask.
class DownloadFileAsync extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
super.onPreExecute();
}
#Override
protected String doInBackground(final String... aurl) {
try {
String extStorageDirectory = Environment.getExternalStorageDirectory().toString();
File dir = new File(extStorageDirectory, "pdf");
if(dir.exists()==false) {
dir.mkdirs();
}
File directory = new File(dir, "original.pdf");
try {
if(!directory.exists())
directory.createNewFile();
} catch (IOException e1) {
e1.printStackTrace();
}
URL url = new URL(aurl[0]);
URLConnection conexion = url.openConnection();
int lenghtOfFile = conexion.getContentLength();
conexion.connect();
conexion.setReadTimeout(10000);
conexion.setConnectTimeout(15000); // millis
FileOutputStream f = new FileOutputStream(directory);
InputStream in = conexion.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = in.read(buffer)) > 0) {
f.write(buffer, 0, len1);
}
f.flush();
f.close();
in.close();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String unused) {
}
}
3>> Call showPdfFromSdCard() after downloading pdf.
public static void showPdfFromSdCard(Context ctx) {
File file = new File(Environment.getExternalStorageDirectory() + "/pdf/original.pdf");
PackageManager packageManager = ctx.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");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
try {
ctx.startActivity(intent);
} catch (ActivityNotFoundException e) {
Toast.makeText(ctx,
"No Application Available to View PDF",
Toast.LENGTH_SHORT).show();
}
}
4>> Call deletePdfFromSdcard() in your onResume()
public static void deletePdfFromSdcard(){
File file = new File(Environment.getExternalStorageDirectory()+"/pdf/original.pdf");
boolean pdfDelete = file.delete();
}

You need to add the internet permission to your manifest file outside of the application tag.
<uses-permission android:name="android.permission.INTERNET" />

after 2 day research no solution find for that so i try to first download PDF file from Amazon web service and store into the SD-Card then open PDF File Here My Code
Note:- This solution is only try for Show PDF in Web view From Amazon web Service.
from other web service try this Code:-
WebView webview=(WebView)findviewbyid(R.id.Webview);
String MyURL= "this is your PDF URL";
String url = "http://docs.google.com/gview?embedded=true&url=" + MyURL;
Log.i(TAG, "Opening PDF: " + url);
webView.getSettings().setJavaScriptEnabled(true);
webView.loadUrl(url);
----------------------------------------------------------------------------------------------> For Amazon Web Service Please Try This code
1>> Download PDF from Amazon WebService
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.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();
}
}
2>> Show PDF From SD-Card
public static void showPdfFromSdCard(Context ctx)
{
File file = new File(Environment.getExternalStorageDirectory()+"/pdf/MyPdf.pdf");
PackageManager packageManager = ctx.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");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
try {
ctx.startActivity(intent);
}
catch (ActivityNotFoundException e) {
Toast.makeText(ctx,
"No Application Available to View PDF",
Toast.LENGTH_SHORT).show();
}
After Download PDF showPdfFromSdCard Method called.
After show PDF you Delete PDF file From SD-card
Here Code for Delete PDF From SD-Card
public static void deletePdfFromSdcard(){
File file = new File(Environment.getExternalStorageDirectory()+"/pdf/MyPdf.pdf");
boolean pdfDelete = file.delete();
}

I will do some modification in #Monika Moon code,
if you don't want to save the File in the device, the process explained above is too long as well as required FileProvider to open the pdf in external pdf viewer.
so for the better solution please follow the below steps.
Step 1:
please add this library to your gradle file.
AndroidPdfViewer
Step 2:
add this in your XML view->
<com.github.barteksc.pdfviewer.PDFView
android:id="#+id/pdfView"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
Step 3:
PDFView pdfView;
InputStream inputStream;
pdfView=findViewById(R.id.pdfView);
class DownloadFileAsync extends AsyncTask<String, String, String> {
#Override
protected void onPreExecute() {
if (mProgressDialog!=null)
{
Utils.cancelProgressDialog(mProgressDialog);
}
mProgressDialog = Utils.showProgressDialog(DocumentViewActivity.this);
super.onPreExecute();
}
#Override
protected String doInBackground(final String... aurl) {
try {
URL url = new URL(aurl[0]);
URLConnection conexion = url.openConnection();
conexion.connect();
conexion.setReadTimeout(20000);
conexion.setConnectTimeout(25000); // millis
inputStream = conexion.getInputStream();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(String unused) {
if (inputStream != null) {
pdfView.fromStream(inputStream)
.defaultPage(0)
.password(null)
.scrollHandle(null)
.enableAntialiasing(true)
.scrollHandle(new DefaultScrollHandle(DocumentViewActivity.this))
.spacing(0)
.onLoad(new OnLoadCompleteListener() {
#Override
public void loadComplete(int nbPages) {
Utils.cancelProgressDialog(mProgressDialog);
}
})
.load();
}else {
Utils.cancelProgressDialog(mProgressDialog);
}
}
}
#Override
protected void onDestroy() {
if (inputStream!=null)
{
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
super.onDestroy();
}
Final Step : call new DownloadFileAsync().execute(url);