commit c0bfbd341454912f18b54278e84e88bff9a87e6a
author linuxemacs <linuxemacs@gmail.com> Fri Dec 05 00:01:36 2008 +0800
committer Jean-Baptiste Queru <jbq@google.com> Wed Aug 26 09:02:40 2009 -0700
tree cf5eddf9ae1ed7c4757c3f3ada978ccca7ffc648
parent 0648422f6721953cee30941b6798ded18e0ad2fb

Fix android application platform will crash problem.

If slide on password lock panel and repeatedly swith this
panel to lock panel with BACK button and POWER/HOME button,
the android application platform will crash.

core/java/com/android/internal/widget/LockPatternView.java

diff --git a/core/java/com/android/internal/widget/LockPatternView.java b/core/java/com/android/internal/widget/LockPatternView.java
index 53be891..bad7292 100644
--- a/core/java/com/android/internal/widget/LockPatternView.java
+++ b/core/java/com/android/internal/widget/LockPatternView.java
@@ -582,6 +582,8 @@
                     mInProgressY = y;
 
                     if (mPatternInProgress) {
+                        if (mPattern.isEmpty()) return false;
+
                         final ArrayList<Cell> pattern = mPattern;
                         final float radius = mSquareWidth * mDiameterFactor * 0.5f;