Allow replacing ResolverActivity via config value

Changed PackageManager to read a config value that indicates if
the default ResolverActivity should be replaced by a custom version.
This config value can be replaced via an overlay.

Bug: 10081151
Change-Id: I6f1c59d053b89fabf52bcda620eb5d4026406701

3 files changed, 70 insertions, 17 deletions

diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index 400e89284444..cb3ac6800160 100644
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -1171,6 +1171,11 @@
     <string name="config_chooseTypeAndAccountActivity"
             >android/android.accounts.ChooseTypeAndAccountActivity</string>
 
+    <!-- Component name of a custom ResolverActivity (Intent resolver) to be used instead of
+         the default framework version. If left empty, then the framework version will be used.
+         Example: com.google.android.myapp/.resolver.MyResolverActivity  -->
+    <string name="config_customResolverActivity"></string>
+
     <!-- Apps that are authorized to access shared accounts, overridden by product overlays -->
     <string name="config_appsAuthorizedForSharedAccounts">;com.android.settings;</string>
 
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index ca93d1c67a98..75ee7ade2091 100755
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -824,6 +824,7 @@
   <java-symbol type="string" name="owner_name" />
   <java-symbol type="string" name="config_chooseAccountActivity" />
   <java-symbol type="string" name="config_chooseTypeAndAccountActivity" />
+  <java-symbol type="string" name="config_customResolverActivity" />
   <java-symbol type="string" name="config_appsAuthorizedForSharedAccounts" />
   <java-symbol type="string" name="error_message_title" />
   <java-symbol type="string" name="action_bar_home_description_format" />
diff --git a/services/java/com/android/server/pm/PackageManagerService.java b/services/java/com/android/server/pm/PackageManagerService.java
index 78c1c79df07e..4942141badbb 100755
--- a/services/java/com/android/server/pm/PackageManagerService.java
+++ b/services/java/com/android/server/pm/PackageManagerService.java
@@ -91,6 +91,7 @@ import android.content.pm.ManifestDigest;
 import android.content.pm.VerificationParams;
 import android.content.pm.VerifierDeviceIdentity;
 import android.content.pm.VerifierInfo;
+import android.content.res.Resources;
 import android.net.Uri;
 import android.os.Binder;
 import android.os.Build;
@@ -116,6 +117,7 @@ import android.os.Environment.UserEnvironment;
 import android.os.UserManager;
 import android.security.KeyStore;
 import android.security.SystemKeyStore;
+import android.text.TextUtils;
 import android.util.DisplayMetrics;
 import android.util.EventLog;
 import android.util.Log;
@@ -158,6 +160,8 @@ import libcore.io.IoUtils;
 import libcore.io.Libcore;
 import libcore.io.StructStat;
 
+import com.android.internal.R;
+
 /**
  * Keep track of all those .apks everywhere.
  * 
@@ -420,6 +424,9 @@ public class PackageManagerService extends IPackageManager.Stub {
     final ResolveInfo mResolveInfo = new ResolveInfo();
     ComponentName mResolveComponentName;
     PackageParser.Package mPlatformPackage;
+    ComponentName mCustomResolverComponentName;
+
+    boolean mResolverReplaced = false;
 
     // Set of pending broadcasts for aggregating enable/disable of components.
     static class PendingPackageBroadcasts {
@@ -1115,6 +1122,15 @@ public class PackageManagerService extends IPackageManager.Stub {
             mRestoredSettings = mSettings.readLPw(this, sUserManager.getUsers(false),
                     mSdkVersion, mOnlyCore);
 
+            String customResolverActivity = Resources.getSystem().getString(
+                    R.string.config_customResolverActivity);
+            if (TextUtils.isEmpty(customResolverActivity)) {
+                customResolverActivity = null;
+            } else {
+                mCustomResolverComponentName = ComponentName.unflattenFromString(
+                        customResolverActivity);
+            }
+
             long startTime = SystemClock.uptimeMillis();
 
             EventLog.writeEvent(EventLogTags.BOOT_PROGRESS_PMS_SYSTEM_SCAN_START,
@@ -3979,6 +3995,11 @@ public class PackageManagerService extends IPackageManager.Stub {
             pkg.applicationInfo.flags |= ApplicationInfo.FLAG_PRIVILEGED;
         }
 
+        if (mCustomResolverComponentName != null &&
+                mCustomResolverComponentName.getPackageName().equals(pkg.packageName)) {
+            setUpCustomResolverActivity(pkg);
+        }
+
         if (pkg.packageName.equals("android")) {
             synchronized (mPackages) {
                 if (mAndroidApplication != null) {
@@ -3990,26 +4011,28 @@ public class PackageManagerService extends IPackageManager.Stub {
                     return null;
                 }
 
-                // Set up information for our fall-back user intent resolution
-                // activity.
+                // Set up information for our fall-back user intent resolution activity.
                 mPlatformPackage = pkg;
                 pkg.mVersionCode = mSdkVersion;
                 mAndroidApplication = pkg.applicationInfo;
-                mResolveActivity.applicationInfo = mAndroidApplication;
-                mResolveActivity.name = ResolverActivity.class.getName();
-                mResolveActivity.packageName = mAndroidApplication.packageName;
-                mResolveActivity.processName = "system:ui";
-                mResolveActivity.launchMode = ActivityInfo.LAUNCH_MULTIPLE;
-                mResolveActivity.flags = ActivityInfo.FLAG_EXCLUDE_FROM_RECENTS;
-                mResolveActivity.theme = com.android.internal.R.style.Theme_Holo_Dialog_Alert;
-                mResolveActivity.exported = true;
-                mResolveActivity.enabled = true;
-                mResolveInfo.activityInfo = mResolveActivity;
-                mResolveInfo.priority = 0;
-                mResolveInfo.preferredOrder = 0;
-                mResolveInfo.match = 0;
-                mResolveComponentName = new ComponentName(
-                        mAndroidApplication.packageName, mResolveActivity.name);
+
+                if (!mResolverReplaced) {
+                    mResolveActivity.applicationInfo = mAndroidApplication;
+                    mResolveActivity.name = ResolverActivity.class.getName();
+                    mResolveActivity.packageName = mAndroidApplication.packageName;
+                    mResolveActivity.processName = "system:ui";
+                    mResolveActivity.launchMode = ActivityInfo.LAUNCH_MULTIPLE;
+                    mResolveActivity.flags = ActivityInfo.FLAG_EXCLUDE_FROM_RECENTS;
+                    mResolveActivity.theme = com.android.internal.R.style.Theme_Holo_Dialog_Alert;
+                    mResolveActivity.exported = true;
+                    mResolveActivity.enabled = true;
+                    mResolveInfo.activityInfo = mResolveActivity;
+                    mResolveInfo.priority = 0;
+                    mResolveInfo.preferredOrder = 0;
+                    mResolveInfo.match = 0;
+                    mResolveComponentName = new ComponentName(
+                            mAndroidApplication.packageName, mResolveActivity.name);
+                }
             }
         }
 
@@ -4874,6 +4897,30 @@ public class PackageManagerService extends IPackageManager.Stub {
         return pkg;
     }
 
+    private void setUpCustomResolverActivity(PackageParser.Package pkg) {
+        synchronized (mPackages) {
+            mResolverReplaced = true;
+            // Set up information for custom user intent resolution activity.
+            mResolveActivity.applicationInfo = pkg.applicationInfo;
+            mResolveActivity.name = mCustomResolverComponentName.getClassName();
+            mResolveActivity.packageName = pkg.applicationInfo.packageName;
+            mResolveActivity.processName = null;
+            mResolveActivity.launchMode = ActivityInfo.LAUNCH_MULTIPLE;
+            mResolveActivity.flags = ActivityInfo.FLAG_EXCLUDE_FROM_RECENTS |
+                    ActivityInfo.FLAG_FINISH_ON_CLOSE_SYSTEM_DIALOGS;
+            mResolveActivity.theme = 0;
+            mResolveActivity.exported = true;
+            mResolveActivity.enabled = true;
+            mResolveInfo.activityInfo = mResolveActivity;
+            mResolveInfo.priority = 0;
+            mResolveInfo.preferredOrder = 0;
+            mResolveInfo.match = 0;
+            mResolveComponentName = mCustomResolverComponentName;
+            Slog.i(TAG, "Replacing default ResolverActivity with custom activity: " +
+                    mResolveComponentName);
+        }
+    }
+
     private void setInternalAppNativeLibraryPath(PackageParser.Package pkg,
             PackageSetting pkgSetting) {
         final String apkLibPath = getApkName(pkgSetting.codePathString);