1 files changed, 18 insertions, 1 deletions
diff --git a/core/java/android/util/SparseBooleanArray.java b/core/java/android/util/SparseBooleanArray.java
index d4c40954bdd1..03fa1c996027 100644
--- a/core/java/android/util/SparseBooleanArray.java
+++ b/core/java/android/util/SparseBooleanArray.java
@@ -16,10 +16,11 @@
 
 package android.util;
 
+import android.annotation.UnsupportedAppUsage;
+
 import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.GrowingArrayUtils;
 
-import android.annotation.UnsupportedAppUsage;
 import libcore.util.EmptyArray;
 
 /**
@@ -167,6 +168,10 @@ public class SparseBooleanArray implements Cloneable {
      * key.</p>
      */
     public int keyAt(int index) {
+        if (index >= mSize) {
+            // The array might be slightly bigger than mSize, in which case, indexing won't fail.
+            throw new ArrayIndexOutOfBoundsException(index);
+        }
         return mKeys[index];
     }
 
@@ -182,6 +187,10 @@ public class SparseBooleanArray implements Cloneable {
      * associated with the largest key.</p>
      */
     public boolean valueAt(int index) {
+        if (index >= mSize) {
+            // The array might be slightly bigger than mSize, in which case, indexing won't fail.
+            throw new ArrayIndexOutOfBoundsException(index);
+        }
         return mValues[index];
     }
 
@@ -189,11 +198,19 @@ public class SparseBooleanArray implements Cloneable {
      * Directly set the value at a particular index.
      */
     public void setValueAt(int index, boolean value) {
+        if (index >= mSize) {
+            // The array might be slightly bigger than mSize, in which case, indexing won't fail.
+            throw new ArrayIndexOutOfBoundsException(index);
+        }
         mValues[index] = value;
     }
 
     /** @hide */
     public void setKeyAt(int index, int key) {
+        if (index >= mSize) {
+            // The array might be slightly bigger than mSize, in which case, indexing won't fail.
+            throw new ArrayIndexOutOfBoundsException(index);
+        }
         mKeys[index] = key;
     }