diff --git a/core/java/android/view/inputmethod/BaseInputConnection.java b/core/java/android/view/inputmethod/BaseInputConnection.java
index 6a2a8d35a007a..1ab9edf0caa20 100644
--- a/core/java/android/view/inputmethod/BaseInputConnection.java
+++ b/core/java/android/view/inputmethod/BaseInputConnection.java
@@ -43,6 +43,8 @@ import android.view.KeyEvent;
 import android.view.OnReceiveContentListener;
 import android.view.View;
 
+import com.android.internal.util.Preconditions;
+
 class ComposingText implements NoCopySpan {
 }
 
@@ -504,7 +506,7 @@ public class BaseInputConnection implements InputConnection {
      */
     @Nullable
     public CharSequence getTextBeforeCursor(@IntRange(from = 0) int length, int flags) {
-        if (length < 0) return null;
+        Preconditions.checkArgumentNonnegative(length);
 
         final Editable content = getEditable();
         if (content == null) return null;
@@ -563,7 +565,7 @@ public class BaseInputConnection implements InputConnection {
      */
     @Nullable
     public CharSequence getTextAfterCursor(@IntRange(from = 0) int length, int flags) {
-        if (length < 0) return null;
+        Preconditions.checkArgumentNonnegative(length);
 
         final Editable content = getEditable();
         if (content == null) return null;
@@ -600,7 +602,8 @@ public class BaseInputConnection implements InputConnection {
     @Nullable
     public SurroundingText getSurroundingText(
             @IntRange(from = 0) int beforeLength, @IntRange(from = 0)  int afterLength, int flags) {
-        if (beforeLength < 0 || afterLength < 0) return null;
+        Preconditions.checkArgumentNonnegative(beforeLength);
+        Preconditions.checkArgumentNonnegative(afterLength);
 
         final Editable content = getEditable();
         if (content == null) return null;