Printers in the list of printers change position.

While the logic was correct the array map that holds the list of pritners
does not keep the position of the items constant. Switched to linked hash
map which gives this guarantee.

bug:10955751

Change-Id: Idbbe14d753e6a1ad1002f2289b10cb62d7f9f040

1 files changed, 4 insertions, 5 deletions

diff --git a/core/java/android/print/PrinterDiscoverySession.java b/core/java/android/print/PrinterDiscoverySession.java
index 6432a37..d32b71b 100644
--- a/core/java/android/print/PrinterDiscoverySession.java
+++ b/core/java/android/print/PrinterDiscoverySession.java
@@ -28,6 +28,7 @@ import android.util.Log;
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.LinkedHashMap;
 import java.util.List;
 
 /**
@@ -40,8 +41,8 @@ public final class PrinterDiscoverySession {
     private static final int MSG_PRINTERS_ADDED = 1;
     private static final int MSG_PRINTERS_REMOVED = 2;
 
-    private final ArrayMap<PrinterId, PrinterInfo> mPrinters =
-            new ArrayMap<PrinterId, PrinterInfo>();
+    private final LinkedHashMap<PrinterId, PrinterInfo> mPrinters =
+            new LinkedHashMap<PrinterId, PrinterInfo>();
 
     private final IPrintManager mPrintManager;
 
@@ -218,9 +219,7 @@ public final class PrinterDiscoverySession {
         }
 
         // Update printers we already have.
-        final int oldPrinterCount = mPrinters.size();
-        for (int i = 0; i < oldPrinterCount; i++) {
-            PrinterId oldPrinterId = mPrinters.keyAt(i);
+        for (PrinterId oldPrinterId : mPrinters.keySet()) {
             PrinterInfo updatedPrinter = addedPrintersMap.remove(oldPrinterId);
             if (updatedPrinter != null) {
                 mPrinters.put(oldPrinterId, updatedPrinter);