[android-beginners] Re: How to install and run applications from within another application?
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) j...@google.com 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 calleanders...@hotmail.com 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 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
[android-beginners] Re: How to install and run applications from within another application?
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 calleanders...@hotmail.com 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 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
[android-beginners] Re: How to install and run applications from within another application?
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
[android-beginners] Re: How to install and run applications from within another application?
On Wed, Jul 1, 2009 at 6:22 PM, calleandersson calleanders...@hotmail.comwrote: Is there somehow possible to simulate that an application has system rights in the Emulator? No, and very intentionally. --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups Android Beginners group. To post to this group, send email to android-beginners@googlegroups.com To unsubscribe from this group, send email to android-beginners-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-beginners?hl=en -~--~~~~--~~--~--~---
[android-beginners] Re: How to install and run applications from within another application?
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?
--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google
Groups Android Beginners group.
To post to this group, send email to android-beginners@googlegroups.com
To unsubscribe from this group, send email to
android-beginners-unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-beginners?hl=en
-~--~~~~--~~--~--~---
[android-beginners] Re: How to install and run applications from within another application?
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
