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?
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