I have been testing with the 'file://' prefix and got the following
results:
When saving an .apk file in the private directory of my application
and trying to invoke the system installation UI, an parse error
occured due to permission issues:
07-02 07:15:27.826: WARN/zipro(726): Unable to open zip '/data/data/
test.calle.helloworld/files/AndroidHelloWorld.apk': Permission denied
07-02 07:15:27.826: DEBUG/asset(726): failed to open Zip archive '/
data/data/test.calle.helloworld/files/AndroidHelloWorld.apk'
07-02 07:15:27.846: WARN/PackageParser(726): Unable to read
AndroidManifest.xml of /data/data/test.calle.helloworld/files/
AndroidHelloWorld.apk
07-02 07:15:27.846: WARN/PackageParser(726):
java.io.FileNotFoundException: AndroidManifest.xml
...
07-02 07:15:27.856: WARN/PackageInstaller(726): Parse error when
parsing manifest. Discontinuing installation
When I saved the .apk file on the SD card, everything went as supposed
and the system installation UI was displayed.
So far so good. However, I only want a downloaded .apk file to be
installed on the same phone which downloaded it. If the application is
placed on the SD card, wouldn't it be possible to use the same SD card
in another phone (or copy the .apk file to another SD card used by
another phone) and install the application on that phone too? Am I
correct in these assumtions?
With regards to what I wrote above, is it somehow possible to restrict
an application file from beeing installed on any other phone except
the very same phone which downloaded the .apk file (using my
application)? Is system rights needed? I suppose this problem
shouldn't exist if I was able to save the .apk file in the private
directory of my application and then invoke the system install UI on
the file.
Regards,
Calle
On 1 Juli, 18:22, calleandersson <calleanders...@hotmail.com> wrote:
> Hi Justin,
>
> Thanks for the tips about the 'file://' prefix and SD card, I will
> look into that tomorrow.
>
> How does the process for retrieving system rights look like? Is it the
> manufacturer of an Android device which decides if an application
> should have system rights? I suppose that that kind of clients must be
> installed/included in the device before it is released or am I wrong?
>
> Is there somehow possible to simulate that an application has system
> rights in the Emulator?
>
> By the way, I was thinking of using the same Intent code to start an
> already installed application but, currently, I'm using the following
> code which seems to work pretty well (and the class name doesn't need
> to be specified):
> Intent intent = getPackageManager().getLaunchIntentForPackage
> (packageName);
> startActivity(intent);
>
> Regards,
> Calle
>
> On 1 Juli, 17:18, "Justin (Google Employee)" <j...@google.com> wrote:
>
>
>
> > The package manager way will not work, you need the permission you
> > referenced, INSTALL_PACKAGES, which only the system has and is not
> > obtainable by user-installed applications.
>
> > I think your Intent-based method should work, I believe this is more
> > or less what the browser does when you download an APK from the
> > internet. I have two thoughts. First, you haven't specified a proper
> > Uri, you've specified a file path, try file:///data/data/... Second,
> > I'm not sure you can place the file in your app's private directory
> > and have this work, to remove this variable, try placing the APK on
> > the SD card.
>
> > As far as removing packages, I'm not sure, I'm not sure what Intent
> > you would use to do this, although certainly some Intent exists,
> > albeit probably private/undocumented. You could watch the logcat
> > output when you go into the application manager from settings.
>
> > Cheers,
> > Justin
> > Android Team @ Google
>
> > On Jul 1, 6:22 am, calleandersson <calleanders...@hotmail.com> wrote:
>
> > > Hi,
>
> > > I am going to create an application (using Android 1.5) which can
> > > download and install other applications and also be able to remove
> > > these applications when needed. I have tried to do this in two
> > > different ways but havn't had any success:
>
> > > -- A: the PackageManager way --
>
> > > Using the following code:
>
> > > getPackageManager().installPackage(Uri.parse(url));
>
> > > an SecurityException occur since (as I understand) it isn't possible
> > > for an application to be granted the INSTALL_PACKAGES permission
> > > (which is needed by the installPackage() method) unless the program
> > > has system rights.
>
> > > A1. Is it correct that system rights is needed by an application to be
> > > granted INSTALL_PACKAGES permission?
>
> > > A2. How can an application acquire system rights?
>
> > > A3. Will this approach generate some kind of platform specific install
> > > popups (or something like that) or could an application be installed
> > > without any user interaction required?
>
> > > -- B: the Intent way --
>
> > > I download an .apk-file using code similar to the following code:
>
> > > URL sourceUrl = new URL(source);
> > > Object data = sourceUrl.getContent();
> > > String fileName = sourceUrl.getFile().substring(fileName.lastIndexOf
> > > ('/') + 1);
> > > // create/open file in the 'data/data/<app namespace>/files' directory
> > > FileOutputStream fos = openFileOutput(fileName, Context.MODE_PRIVATE);
> > > int read = 0;
> > > byte[] buffer = new byte[512];
> > > BufferedInputStream bis = new BufferedInputStream((InputStream) data);
> > > do{
> > > read = bis.read(buffer);
> > > if(read > 0){
> > > fos.write(buffer, 0, read);
> > > }
>
> > > }while(read != -1);
>
> > > and then i try to invoke an installation of the application by using
> > > the following code (which I belive should bring the system UI up for
> > > the user to confirm the install):
>
> > > Intent intent = new Intent();
> > > intent.setAction(android.content.Intent.ACTION_VIEW);
> > > intent.setDataAndType(Uri.parse("/data/data/test.calle.helloworld/
> > > files/AndroidHelloWorld.apk"), "application/vnd.android.package-
> > > archive");
> > > startActivity(intent);
>
> > > but this only generates an ActivityNotFoundException:
> > > 07-01 10:11:05.354: ERROR/AndroidRuntime(2480):
> > > android.content.ActivityNotFoundException: No Activity found to handle
> > > Intent { action=android.intent.action.VIEW data=/data/data/
> > > test.calle.helloworld/files/AndroidHelloWorld.apk type=application/
> > > vnd.android.package-archive }
>
> > > B1. What am I doing wrong/missing in the attempt to install the
> > > downloaded application?
>
> > > B2. Will this approach bring the system UI up (for the user to confirm
> > > the install) or have I misunderstood something?
>
> > > B3. Could I use the same Intent code to start an already installed
> > > application or do I need change some input data?
>
> > > B4. Is it possible to initiate an uninstall of an application with a
> > > similar approach (without beeing granted the REMOVE_PACKAGES
> > > permission)?
>
> > > B5. Is there some cleaner/easier way of downloading an entire file
> > > from the internet to the file system and should I use
> > > 'Context.MODE_PRIVATE' when I call the openFileOutput() method?- Dölj
> > > citerad text -
>
> > - Visa citerad text -- Dölj citerad text -
>
> - Visa citerad text -
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