From 9d4c55a2511f76c8098172a2676eb3207c2baaa9 Mon Sep 17 00:00:00 2001
From: ZhaoPengyuan <work_zpy@sina.com>
Date: Fri, 14 Aug 2020 10:01:14 +0800
Subject: [PATCH] ams:stop app only if there are no tasks

when remove task, stop the app only if there are no tasks
---
 .../server/am/ActivityManagerService.java     | 24 +++++++++++++++----
 1 file changed, 20 insertions(+), 4 deletions(-)

diff --git a/services/core/java/com/android/server/am/ActivityManagerService.java b/services/core/java/com/android/server/am/ActivityManagerService.java
index a178f3f4..bbf80fb3 100644
--- a/services/core/java/com/android/server/am/ActivityManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityManagerService.java
@@ -9018,6 +9018,21 @@ public final class ActivityManagerService extends ActivityManagerNative
     // TASK MANAGEMENT
     // =========================================================
 
+    public int getAppTasksCnt(String callingPackage) {
+        final int N = mRecentTasks.size();
+        int cnt = 0;
+        for (int i = 0; i < N; i++) {
+            TaskRecord tr = mRecentTasks.get(i);
+            Intent intent = tr.getBaseIntent();
+            if (intent == null ||
+                !callingPackage.equals(intent.getComponent().getPackageName())) {
+                continue;
+            }
+            cnt += 1;
+        }
+        return cnt;
+    }
+
     @Override
     public List<IAppTask> getAppTasks(String callingPackage) {
         int callingUid = Binder.getCallingUid();
@@ -9670,11 +9685,12 @@ public final class ActivityManagerService extends ActivityManagerNative
         final TaskRecord tr = mStackSupervisor.anyTaskForIdLocked(
                 taskId, !RESTORE_FROM_RECENTS, INVALID_STACK_ID);
         if (tr != null) {
-            tr.removeTaskActivitiesLocked();
-            cleanUpRemovedTaskLocked(tr, killProcess, removeFromRecents);
             ComponentName  component = tr.getBaseIntent().getComponent();
             final String pkgName = component.getPackageName();
-            if (validatePkgName(pkgName)) {
+            tr.removeTaskActivitiesLocked();
+            cleanUpRemovedTaskLocked(tr, killProcess, removeFromRecents);
+            int cnt = getAppTasksCnt(pkgName);
+            if (cnt == 0 && validatePkgName(pkgName)) {
                 String cmd = "am force-stop " + pkgName;
                 try {
                     Runtime.getRuntime().exec(cmd);
@@ -19083,7 +19099,7 @@ public final class ActivityManagerService extends ActivityManagerNative
                 if ((changes&ActivityInfo.CONFIG_LOCALE) != 0) {
                     intent = new Intent(Intent.ACTION_LOCALE_CHANGED);
                     intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
-	            if (initLocale || !mProcessesReady) {
+                    if (initLocale || !mProcessesReady) {
                         intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
                     }
                     broadcastIntentLocked(null, null, intent,
-- 
Gitee