removed calls to deprecated APIs

Change-Id: Iaaee3e770bf65d4f041b0786d0cf6c683feebea6
diff --git a/src/com/android/mms/ui/NumberPickerDialog.java b/src/com/android/mms/ui/NumberPickerDialog.java
index bc48555..da835c9 100644
--- a/src/com/android/mms/ui/NumberPickerDialog.java
+++ b/src/com/android/mms/ui/NumberPickerDialog.java
@@ -24,7 +24,6 @@
 import android.util.AttributeSet;
 import android.view.LayoutInflater;
 import android.view.View;
-import android.widget.LinearLayout;
 
 import com.android.internal.widget.NumberPicker;
 
@@ -87,8 +86,9 @@
 
         setTitle(title);
 
-        setButton(context.getText(R.string.set), this);
-        setButton2(context.getText(R.string.no), (OnClickListener) null);
+        setButton(DialogInterface.BUTTON_POSITIVE, context.getText(R.string.set), this);
+        setButton(DialogInterface.BUTTON_NEGATIVE, context.getText(R.string.no),
+                (OnClickListener) null);
 
         LayoutInflater inflater =
                 (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);