Add a clear button at the end of the weight field

MyTracks/res/layout/choose_activity_type.xml

@@ -39,16 +39,29 @@ limitations under the License.
       android:layout_marginTop="4dp"
       android:paddingLeft="12dp"
       style="@style/TextMedium" />
-    <EditText
-      android:id="@+id/choose_activity_type_weight"
-      android:inputType="numberDecimal"
-      android:layout_marginBottom="4dp"
-      android:layout_marginLeft="16dp"
-      android:layout_marginRight="16dp"
-      android:layout_marginTop="2dp"
-      android:layout_width="match_parent"
-      android:selectAllOnFocus="true"
-      android:singleLine="true"
-      style="@style/TextMedium" />
+    <FrameLayout
+      android:layout_height="wrap_content"
+      android:layout_width="fill_parent" >
+      <EditText
+        android:id="@+id/choose_activity_type_weight"
+        android:inputType="numberDecimal"
+        android:layout_marginBottom="4dp"
+        android:layout_marginLeft="16dp"
+        android:layout_marginRight="16dp"
+        android:layout_marginTop="2dp"
+        android:layout_width="match_parent"
+        android:selectAllOnFocus="true"
+        android:singleLine="true"
+        style="@style/TextMedium" />
+      <ImageButton
+        android:background="@android:color/transparent"
+        android:id="@+id/choose_activity_type_weight_image_button"
+        android:layout_gravity="right|center_vertical"
+        android:layout_height="wrap_content"
+        android:layout_marginRight="16dp"
+        android:layout_width="wrap_content"
+        android:paddingRight="12dp"
+        android:src="@android:drawable/ic_menu_close_clear_cancel" />
+    </FrameLayout>
   </LinearLayout>
 </LinearLayout>

MyTracks/src/com/google/android/apps/mytracks/fragments/ChooseActivityTypeDialogFragment.java

@@ -19,6 +19,7 @@ package com.google.android.apps.mytracks.fragments;
 import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.apps.mytracks.util.StringUtils;
 import com.google.android.apps.mytracks.util.TrackIconUtils;
+import com.google.android.apps.mytracks.util.UnitConversions;
 import com.google.android.maps.mytracks.R;
 
 import android.app.Activity;
@@ -33,6 +34,7 @@ import android.view.View;
 import android.widget.AdapterView;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.GridView;
+import android.widget.ImageButton;
 import android.widget.TextView;
 
 import java.util.ArrayList;
@@ -101,7 +103,19 @@ public class ChooseActivityTypeDialogFragment extends DialogFragment {
             : R.string.description_weight_imperial);
     
     weight = (TextView) view.findViewById(R.id.choose_activity_type_weight);
-
+    ImageButton imageButton = (ImageButton) view.findViewById(
+        R.id.choose_activity_type_weight_image_button);
+    imageButton.setOnClickListener(new View.OnClickListener() {
+        @Override
+      public void onClick(View v) {
+        double weightDefault = PreferencesUtils.WEIGHT_DEFAULT;
+        if (!PreferencesUtils.isMetricUnits(getActivity())) {
+          weightDefault *= UnitConversions.KG_TO_LB;
+        }
+        weight.setText(StringUtils.formatWeight(weightDefault));
+      }
+    });
+    
     List<Integer> imageIds = new ArrayList<Integer>();
     for (String iconValue : TrackIconUtils.getAllIconValues()) {
       imageIds.add(TrackIconUtils.getIconDrawable(iconValue));

MyTracks/src/com/google/android/apps/mytracks/util/StringUtils.java

@@ -159,7 +159,7 @@ public class StringUtils {
   
   private static String formatDecimal(double value, int precision) {
     String result = String.format(Locale.getDefault(), "%1$,." + precision + "f", value);
-    return value % 1 == 0 ? result.substring(0, result.lastIndexOf('.')) : result;
+    return result.replaceAll("[0]*$", "").replaceAll("\\.$", "");
   }
 
   /**