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Improve installer attribution in App Info.

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When an app is installed by the Package Installer app on behalf of
another app (eg. a browser, file manager or app store that opens an APK
via an activity start), it is preferable to attribute the install to the
originating app rather than the 'Package Installer' itself.

Since Android R, package manager keeps track of the necessary install
source information which enables this more precise attribution. If an
originating package is recorded and was set by a system app, we use this
as the user-visible 'installer'.

Bug: 182365285
Test: make RunSettingsRoboTests
Change-Id: Ibb329d6fe8f0fa2ad51d3530a219b2d8b8d6c17b
This commit is contained in:
Edward Cunningham
2021-03-14 13:47:00 +00:00
parent e98a5a9932
commit faf44124ba
4 changed files with 144 additions and 32 deletions
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30
src/com/android/settings/applications/AppStoreUtil.java
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@@ -18,6 +18,9 @@ package com.android.settings.applications;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.InstallSourceInfo;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.pm.ResolveInfo;
import android.util.Log;
@@ -31,15 +34,30 @@ public class AppStoreUtil {
.setClassName(result.activityInfo.packageName, result.activityInfo.name) : null;
}
// Returns the package name of the app which installed a given packageName, if one is
// available.
// Returns the package name of the app that we consider to be the user-visible 'installer'
// of given packageName, if one is available.
public static String getInstallerPackageName(Context context, String packageName) {
String installerPackageName = null;
String installerPackageName;
try {
installerPackageName =
context.getPackageManager().getInstallerPackageName(packageName);
} catch (IllegalArgumentException e) {
InstallSourceInfo source =
context.getPackageManager().getInstallSourceInfo(packageName);
// By default, use the installing package name.
installerPackageName = source.getInstallingPackageName();
// Use the recorded originating package name only if the initiating package is a system
// app (eg. Package Installer). The originating package is not verified by the platform,
// so we choose to ignore this when supplied by a non-system app.
String originatingPackageName = source.getOriginatingPackageName();
String initiatingPackageName = source.getInitiatingPackageName();
if (originatingPackageName != null && initiatingPackageName != null) {
ApplicationInfo ai = context.getPackageManager().getApplicationInfo(
initiatingPackageName, 0);
if ((ai.flags & ApplicationInfo.FLAG_SYSTEM) != 0) {
installerPackageName = originatingPackageName;
}
}
} catch (NameNotFoundException e) {
Log.e(LOG_TAG, "Exception while retrieving the package installer of " + packageName, e);
installerPackageName = null;
}
return installerPackageName;
}