From af73b2b8626c022daf36190dd4277b135db2e41d Mon Sep 17 00:00:00 2001
From: David Anderson <davea@ssl.berkeley.edu>
Date: Wed, 12 Jun 2013 12:15:57 -0700
Subject: [PATCH] Android client: remove apps from memory if we're on
 batteries.

Because apps poll 10X/sec for messages from the client,
there is a CPU overhead in leaving suspended apps in memory,
which can cause battery drain.
---
 client/app_control.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/client/app_control.cpp b/client/app_control.cpp
index 15e86d39b0..bc5c7521e5 100644
--- a/client/app_control.cpp
+++ b/client/app_control.cpp
@@ -1076,8 +1076,17 @@ void ACTIVE_TASK_SET::suspend_all(int reason) {
             //
             atp->preempt(REMOVE_NEVER);
             break;
+#ifdef ANDROID
+        case SUSPEND_REASON_BATTERIES:
+            // On Android, remove apps from memory if on batteries.
+            // The message polling in the BOINC runtime system
+            // imposes an overhead which drains the battery a bit
+            atp->preempt(REMOVE_ALWAYS);
+            break;
+#endif
         default:
             atp->preempt(REMOVE_MAYBE_USER);
+            break;
         }
     }
 }