I am using the following program to download and install an apk. How can I remove the apk from the sdcard after successful installation? What I tried is:
File file = new File("/sdcard/filename.apk");
boolean deleted = file.delete();
But it will delete the file before installation.
protected Boolean doInBackground(String... arg0) {
try {
URL url = new URL( weburl +"username="+usename+"&password="+usepass +"&apk="+apk);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setRequestMethod("GET");
urlConnection.setDoOutput(true);
urlConnection.connect();
File sdcard = Environment.getExternalStorageDirectory();
File file = new File(sdcard, "filename.apk");
FileOutputStream fileOutput = new FileOutputStream(file);
InputStream inputStream = urlConnection.getInputStream();
byte[] buffer = new byte[1024];
int bufferLength = 0;
while ( (bufferLength = inputStream.read(buffer)) > 0 ) {
fileOutput.write(buffer, 0, bufferLength);
}
fileOutput.close();
// this.checkUnknownSourceEnability();
// this.initiateInstallation();
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(new File("/sdcard/filename.apk"));
intent.setDataAndType(uri, "application/vnd.android.package-archive");
startActivity(intent);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
private void installApk(){
Intent intent = new Intent(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(new File("/sdcard/filename.apk"));
intent.setDataAndType(uri, "application/vnd.android.package-archive");
startActivity(intent);
}
You can register a broadcast receiver that will notify you when installation will complete and at that time you can fire your code for delete apk.
please see this question
How to find out when an installation is completed
Related
I'm trying to programmatically download an .apk file from a given URL and then install it, but I am getting a FileNotFoundException. What could be a possible reason for the issue?
try {
URL url = new URL(fileURL);
HttpURLConnection c = (HttpURLConnection) url.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
String PATH = "/mnt/sdcard/Download/";
File file = new File(PATH);
file.mkdirs();
File outputFile = new File(file, "VersionUpdate.apk");
if(outputFile.exists()){
outputFile.delete();
}
FileOutputStream fos = new FileOutputStream(outputFile);
**//Getting error in this line**
InputStream is = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);
}
fos.flush();
fos.close();
is.close();
} catch (Exception e) {
Log.e("UpdateAPP", "Update error! " + e.getMessage());
}
return null;
}
#Override
protected void onPostExecute(String unused) {
//dismiss the dialog after the file was downloaded
dismissDialog(DIALOG_DOWNLOAD_PROGRESS);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setDataAndType(Uri.parse("file:///sdcard/download/VersionUpdate.apk"),"application/vnd.android.package-archive");
startActivity(intent);
}
You just replaced by InputStream is = c.getInputStream(); to given code.
InputStream is ;
int status = c.getResponseCode();
if (status != HttpURLConnection.HTTP_OK)
is = c.getErrorStream();
else
is = c.getInputStream();
Try the following code
File outputFile = new File(file, "VersionUpdate.apk");
if(!outputFile.exists())
{
outputFile.createNewFile();
}
What you are doing is deleting the file, when it already exist, then FileOutputStream will not get file where you want to download the apk .
If the file already exist, FileOutputStream will override the content with new update.
If you have queries, do ask!!
I want to update my application automatically
This is the code i am using
public void Update(String apkurl){
try {
URL url = new URL(apkurl);
HttpURLConnection c = (HttpURLConnection) url.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
String PATH = Environment.getExternalStorageDirectory() + "/download/";
File file = new File(PATH);
file.mkdirs();
File outputFile = new File(file, "DeliverReceipt.apk");
FileOutputStream fos = new FileOutputStream(outputFile);
InputStream is = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);
}
fos.close();
is.close();//till here, it works fine - .apk is download to my sdcard in download file
/*Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/apk/" + "DeliverReceipt.apk")), "application/vnd.android.package-archive");
startActivity(intent); //installation is not working
*/
} catch (IOException e) {
Toast.makeText(getApplicationContext(), "Update error!", Toast.LENGTH_LONG).show();
}
}
The downloaded file is just 20kb size, which is less than the original
how can i solve this problem?
thank you
*noted : if i try this url in browser it's work, an apk can be downloaded
You should probably flush before you close the file, using fos.flush()
Iam trying to Downloading pdf from server and displaying it as it is in android micromax funbook.
I am getting the error as document size is empty(0 KB).when open the pdf file...
I'm new to android suggest me the coding what i am using is correct or not for downloading
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();
}
}
and the code for showing pdf.
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);
}
Use DownloadManager instead of writing your own download code .
You should use c.openStream(); instead of c.getinputstream();.
This question already has an answer here:
Closed 10 years ago.
Possible Duplicate:
Download PDF from url and read it
I have to download a pdf file from an url and save it to the sd card and then to read it.
I got through many codes and i found this
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("*url for your pdf*"));
startActivity(browserIntent);
but how to save it in sd-card in my desired path and then read it from there.
Please take a look at this link.
It Contains an example of your requirement. Below there is a summary of the information in the link.
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);
}
}
In my application, the user needs to download PDF file from an url and store it on sdcard.
But the catch here is I can only use DefaultHttpClient to access the url.
I found couple of solutions but none used DefaultHttpClient.
After downloading the PDF, I would also likie to view the PDF in my application.
//use this method to download the pdf file
public void downloadPdfContent(String urlToDownload){
try {
String fileName="xyz";
String fileExtension=".pdf";
// download pdf file.
URL url = new URL(urlToDownload);
HttpURLConnection c = (HttpURLConnection) url.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
String PATH = Environment.getExternalStorageDirectory() + "/mydownload/";
File file = new File(PATH);
file.mkdirs();
File outputFile = new File(file, fileName+fileExtension);
FileOutputStream fos = new FileOutputStream(outputFile);
InputStream is = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
fos.write(buffer, 0, len1);
}
fos.close();
is.close();
System.out.println("--pdf downloaded--ok--"+urlToDownload);
} catch (Exception e) {
e.printStackTrace();
}
}
// for viewing the pdf use this method
private void onPdfClick()
{
// String pdfFile = Environment.getExternalStorageDirectory()+ File.separator + AstroManager.file.getName();
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File("/sdcard/mydownload/xyz.pdf"), "application/*");
startActivity(intent);
}
If you have to open pdf file, pdf reader must have to be installed in your device.Otherwise it will show blank screen.
Also here is good example to download pdf from server and view its contents.
see http://developer.android.com/reference/org/apache/http/client/methods/HttpGet.html for retreiving data from a url with a DefaultHttpClient