updated list item span with variable width of numbers and bullets

Author: Salvatore Ranieri

HtmlSpanner/src/main/java/com/sysdata/htmlspanner/HtmlSpanner.java

@@ -16,6 +16,7 @@
 
 package com.sysdata.htmlspanner;
 
+import android.graphics.Paint;
 import android.text.Spannable;
 import android.text.SpannableStringBuilder;
 import android.text.TextUtils;
@@ -72,6 +73,9 @@ public class HtmlSpanner {
      * Used for calculating margins.
      */
     public static final int HORIZONTAL_EM_WIDTH = 10;
+    public static int NUMBER_WIDTH = 5;
+    public static int BULLET_WIDTH = 3;
+    public static int BLANK_WIDTH = 10;
 
 
     private Map<String, TagNodeHandler> handlers;
@@ -163,6 +167,11 @@ public class HtmlSpanner {
      */
     public HtmlSpanner(int textColor,float textSize) {
         this(createHtmlCleaner(), new SystemFontResolver(),textColor,textSize);
+        Paint paint = new Paint();
+        paint.setTextSize(textSize);
+        NUMBER_WIDTH = Math.round(paint.measureText("4."));
+        BULLET_WIDTH = Math.round(paint.measureText("\u2022"));
+        BLANK_WIDTH = Math.round(paint.measureText(" "));
     }
 
     /**

HtmlSpanner/src/main/java/com/sysdata/htmlspanner/spans/ListItemSpan.java

@@ -16,10 +16,12 @@
 
 package com.sysdata.htmlspanner.spans;
 
+import android.app.Notification;
 import android.graphics.Canvas;
 import android.graphics.Paint;
 import android.text.Layout;
 import android.text.Spanned;
+import android.text.style.BulletSpan;
 import android.text.style.LeadingMarginSpan;
 import com.sysdata.htmlspanner.HtmlSpanner;
 
@@ -36,11 +38,11 @@
 public class ListItemSpan implements LeadingMarginSpan {
     private final int mNumber;
 
-    private static final int BULLET_RADIUS = 3;
-    private static final int NUMBER_RADIUS = 5;
+    private static final int BULLET_RADIUS = HtmlSpanner.BULLET_WIDTH;
+    private static final int NUMBER_RADIUS = HtmlSpanner.NUMBER_WIDTH;
 
     //Gap should be about 1em
-    public static final int STANDARD_GAP_WIDTH = HtmlSpanner.HORIZONTAL_EM_WIDTH;
+    public static final int STANDARD_GAP_WIDTH = HtmlSpanner.BLANK_WIDTH;
 
     public ListItemSpan() {
         mNumber = -1;
@@ -52,9 +54,9 @@ public ListItemSpan(int number) {
 
     public int getLeadingMargin(boolean first) {
         if (mNumber != -1) {
-            return 2 * (NUMBER_RADIUS + STANDARD_GAP_WIDTH);
+            return (NUMBER_RADIUS + STANDARD_GAP_WIDTH);
         } else {
-            return 2 * (BULLET_RADIUS + STANDARD_GAP_WIDTH);
+            return (BULLET_RADIUS + STANDARD_GAP_WIDTH);
         }
     }
 

app/src/main/res/layout/activity_main.xml

@@ -13,6 +13,7 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="parent"
+        android:padding="25dp"/>
 
 </android.support.constraint.ConstraintLayout>