Add explicit refererences and logging to KeyguardSim/Puk

Adds explicit references to the given threads in case they
are the victims of a GC and adds logging to help track down
this issue if not.

Bug 10323372

Change-Id: I8e2fe46e10bbc5d14e631d45d8869b3214213045
diff --git a/packages/Keyguard/src/com/android/keyguard/KeyguardSimPukView.java b/packages/Keyguard/src/com/android/keyguard/KeyguardSimPukView.java
index 31518a1..6e9e83e 100644
--- a/packages/Keyguard/src/com/android/keyguard/KeyguardSimPukView.java
+++ b/packages/Keyguard/src/com/android/keyguard/KeyguardSimPukView.java
@@ -45,9 +45,10 @@
         implements KeyguardSecurityView, OnEditorActionListener, TextWatcher {
     private static final String LOG_TAG = "KeyguardSimPukView";
     private static final boolean DEBUG = KeyguardViewMediator.DEBUG;
+    public static final String TAG = "KeyguardSimPukView";
 
     private ProgressDialog mSimUnlockProgressDialog = null;
-    private volatile boolean mCheckInProgress;
+    private CheckSimPuk mCheckSimPukThread;
     private String mPukText;
     private String mPinText;
     private StateMachine mStateMachine = new StateMachine();
@@ -220,15 +221,17 @@
         @Override
         public void run() {
             try {
+                Log.v(TAG, "call supplyPukReportResult()");
                 final int[] result = ITelephony.Stub.asInterface(ServiceManager
                         .checkService("phone")).supplyPukReportResult(mPuk, mPin);
-
+                Log.v(TAG, "supplyPukReportResult returned: " + result[0] + " " + result[1]);
                 post(new Runnable() {
                     public void run() {
                         onSimLockChangedResponse(result[0], result[1]);
                     }
                 });
             } catch (RemoteException e) {
+                Log.e(TAG, "RemoteException for supplyPukReportResult:", e);
                 post(new Runnable() {
                     public void run() {
                         onSimLockChangedResponse(PhoneConstants.PIN_GENERAL_FAILURE, -1);
@@ -295,9 +298,8 @@
     private void updateSim() {
         getSimUnlockProgressDialog().show();
 
-        if (!mCheckInProgress) {
-            mCheckInProgress = true;
-            new CheckSimPuk(mPukText, mPinText) {
+        if (mCheckSimPukThread == null) {
+            mCheckSimPukThread = new CheckSimPuk(mPukText, mPinText) {
                 void onSimLockChangedResponse(final int result, final int attemptsRemaining) {
                     post(new Runnable() {
                         public void run() {
@@ -326,11 +328,12 @@
                                         + " attemptsRemaining=" + attemptsRemaining);
                                 mStateMachine.reset();
                             }
-                            mCheckInProgress = false;
+                            mCheckSimPukThread = null;
                         }
                     });
                 }
-            }.start();
+            };
+            mCheckSimPukThread.start();
         }
     }