diff --git a/services/core/java/com/android/server/am/TaskRecord.java b/services/core/java/com/android/server/am/TaskRecord.java
index b030d5060c8b4d8bd59740285186fd31fbdea913..2f552165ca37f2a3dfb44665ed01d85c8c40a93a 100755
--- a/services/core/java/com/android/server/am/TaskRecord.java
+++ b/services/core/java/com/android/server/am/TaskRecord.java
@@ -1574,36 +1574,34 @@ final class TaskRecord {
 
     Rect updateOverrideConfigurationFromLaunchBounds(boolean defaultBounds) {
         Rect oriBounds;
-        int reserved = 20;
-        int width = 1920 - reserved;
-        int height = 1080 - 40 - reserved; // 40 means the height of mission Board
+        int reserved = 10;
+        int height = 1080 - 40 - 2 * reserved; // 40 means the height of mission Board
+        int width = 1920 - 40 - 2 * reserved;  // maybe mission Board is set to left or right
 
         if (defaultBounds) {
             oriBounds = validateBounds(getLaunchBounds());
-
-            if (oriBounds == null) {
-            } else if (oriBounds.height() >= height || oriBounds.width() >= width) {
-                oriBounds.offsetTo(0, 0);
-            } else {
-                int level =10;
-                int cnt = (int)(System.currentTimeMillis() % level);
-
-                int offsetY = (height - oriBounds.height()) / level * cnt;
-                int offsetX = (width - oriBounds.width()) / level * cnt;
-                oriBounds.offsetTo(offsetX, offsetY);
-            }
         } else {
             int left = 300;
             int top = 300;
             int right = left + 960;
             int bottom = top + 540 + 42;
             oriBounds = new Rect(left, top, right, bottom);
+        }
+
+        if (oriBounds != null) {
+            int level = 10;
+            int offsetY = 0;
+            int offsetX = 0;
 
-            int level =10;
-            int cnt = (int)(System.currentTimeMillis() % level);
+            if (oriBounds.height() < height) {
+                int cntY = (int)(System.currentTimeMillis() % level);
+                offsetY = reserved + (height - oriBounds.height()) / level * cntY;
+            }
 
-            int offsetY = (height - oriBounds.height()) / level * cnt;
-            int offsetX = (width - oriBounds.width()) / level * cnt;
+            if (oriBounds.width() < width) {
+                int cntX = (int)(System.currentTimeMillis() % level);
+                offsetX = reserved + (width - oriBounds.width()) / level * cntX;
+            }
             oriBounds.offsetTo(offsetX, offsetY);
         }