For getLaunchIntentForPackage(), it says it is undefined for type PackageManager and hence code cannot compile? i can see the other methods when I put . after getPackageManager() except this one.
Thanks Yasser On Jul 6, 10:39 am, "Justin (Google Employee)" <[email protected]> wrote: > > > How does the process for retrieving system rights look like? > > Its a matter of signatures. Whoever signs the system is also going to > need to sign any app that wants system privileges. > > > 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. > > Well, no, you can't have your cake and eat it to. The package manager > needs to be able to read the APK file to install the app. In order to > do this you need to place the APK in a world-readable location because > you can't have the same UID or GID as the package manager. No matter > what you do, if you want to allow the package manager to read the > file, everyone can. Now, if you put the file in your private directory > and set the mode to MODE_WORLD_READABLE, the package manager may be > able to read the file, I think it should be able to. Everyone else > can, but they would have to know the exact path because I don't > believe they can list the directory in which the file resides. > > Now, regardless of where the APK is placed, you should probably delete > it after installation, otherwise you're at least doubling storage > space required per application. If you delete the APK after its > installed, you also fix your "install only to device downloaded on". > > Cheers, > Justin > Android Team @ Google > > On Jul 2, 3:48 am, calleandersson <[email protected]> wrote: > > > > > 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 <[email protected]> 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)" <[email protected]> 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 <[email protected]> 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 -- Hide quoted text - > > - Show quoted text - --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-beginners?hl=en -~----------~----~----~----~------~----~------~--~---
