fix filtertab issue

library/src/cn/ieclipse/af/view/FilterTabView.java

@@ -43,7 +43,7 @@ public FilterTabView(FilterTabHost expandableLayout) {
     }
 
     public FilterTabView(FilterTabHost expandableLayout, CharSequence title) {
-        this(expandableLayout, null, null);
+        this(expandableLayout, title, null);
     }
 
     public FilterTabView(FilterTabHost expandableLayout, CharSequence title, OnPopupItemClickListener listener) {

sample/src/main/java/cn/ieclipse/af/demo/common/view/SimpleFilterTab.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2015-2016 adviser2
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package cn.ieclipse.af.demo.common.view;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.drawable.Drawable;
+import android.os.Build;
+import android.support.annotation.RequiresApi;
+import android.text.TextUtils;
+import android.util.AttributeSet;
+import android.widget.ToggleButton;
+
+/**
+ * Description
+ *
+ * @author Jamling
+ */
+public class SimpleFilterTab extends ToggleButton {
+    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
+    public SimpleFilterTab(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    public SimpleFilterTab(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public SimpleFilterTab(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public SimpleFilterTab(Context context) {
+        super(context);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        Drawable[] drawables = getCompoundDrawables();
+        if (drawables != null) {
+            Drawable drawableLeft = drawables[2]; // right drawable
+            if (drawableLeft != null) {
+                CharSequence text = getText();
+                if (TextUtils.isEmpty(text)) {
+                    text = getHint();
+                }
+                float textWidth = 0;
+                if (!TextUtils.isEmpty(text)) {
+                    textWidth = getPaint().measureText(text.toString());
+                }
+                int drawablePadding = getCompoundDrawablePadding();
+                int drawableWidth = 0;
+                drawableWidth = drawableLeft.getIntrinsicWidth();
+                float bodyWidth = textWidth + drawableWidth + drawablePadding;
+                float middle = (getMeasuredWidth() - bodyWidth) / 2;
+                if (middle > 0) {
+                    canvas.translate(-middle, 0);
+                }
+            }
+        }
+        super.onDraw(canvas);
+    }
+}

sample/src/main/res/layout/common_filter_tab_item.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<cn.ieclipse.af.demo.common.view.SimpleFilterTab
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="40dp"
+    android:layout_weight="1"
+    android:background="@null"
+    android:drawablePadding="3dp"
+    android:drawableRight="@android:drawable/arrow_down_float"
+    android:gravity="right|center_vertical"
+    android:maxLines="1"
+    android:textColor="@color/fg_main_bottom_selector"
+    android:textOff="@null"
+    android:textOn="@null"
+    android:textSize="16sp"
+    android:textStyle="bold"
+    tools:text="Item1">
+
+</cn.ieclipse.af.demo.common.view.SimpleFilterTab>