am f930232f: Fix a major problem in fragment lifecycle.

* commit 'f930232fd1c8d301d91853c8fe5dca43979ac807':
  Fix a major problem in fragment lifecycle.

1 files changed, 9 insertions, 1 deletions

diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index 1a333ba..01bd7a9 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -7536,7 +7536,8 @@ public final class ActivityManagerService extends ActivityManagerNative
                 pw.println("  COMP_SPEC may also be a component name (com.foo/.myApp),");
                 pw.println("    a partial substring in a component name, an");
                 pw.println("    ActivityRecord hex object identifier, or");
-                pw.println("    \"all\" for all objects");
+                pw.println("    \"all\" for all objects, or");
+                pw.println("    \"top\" for the top activity.");
                 pw.println("  -a: include all available server state.");
                 pw.println("  -c: include client state.");
                 return;
@@ -8090,6 +8091,13 @@ public final class ActivityManagerService extends ActivityManagerNative
                     activities.add(r1);
                 }
             }
+        } else if ("top".equals(name)) {
+            synchronized (this) {
+                final int N = mMainStack.mHistory.size();
+                if (N > 0) {
+                    activities.add((ActivityRecord)mMainStack.mHistory.get(N-1));
+                }
+            }
         } else {
             ComponentName componentName = ComponentName.unflattenFromString(name);
             int objectId = 0;