diff --git a/.idea/modules.xml b/.idea/modules.xml
index 8d9fd1f..62cc6ac 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -2,6 +2,7 @@
 <project version="4">
   <component name="ProjectModuleManager">
     <modules>
+      <module fileurl="file://$PROJECT_DIR$/BuyWhat.iml" filepath="$PROJECT_DIR$/BuyWhat.iml" />
       <module fileurl="file://C:\Project\BuyWhatNative\BuyWhat.iml" filepath="C:\Project\BuyWhatNative\BuyWhat.iml" />
       <module fileurl="file://$PROJECT_DIR$/BuyWhatNative.iml" filepath="$PROJECT_DIR$/BuyWhatNative.iml" />
       <module fileurl="file://$PROJECT_DIR$/app/app.iml" filepath="$PROJECT_DIR$/app/app.iml" />
diff --git a/app/build.gradle b/app/build.gradle
index f118913..8cd8421 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -11,14 +11,25 @@ android {
         applicationId "xyz.mtfos.buywhat"
         minSdkVersion 15
         targetSdkVersion 26
-        versionCode 1
-        versionName "1.0"
+        versionCode 4
+        versionName "1.0.1"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
     }
+
+    signingConfigs {
+        release {
+            storeFile file("${rootDir}/mtfos")
+            storePassword "pass.ok=1"
+            keyAlias "mtfos"
+            keyPassword "pass.ok=1"
+        }
+    }
+
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+            signingConfig signingConfigs.release
         }
     }
 }
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 45f0bf2..6b36685 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -6,9 +6,9 @@
 
     <application
         android:allowBackup="true"
-        android:icon="@mipmap/ic_launcher"
+        android:icon="@drawable/logo"
         android:label="@string/app_name"
-        android:roundIcon="@mipmap/ic_launcher_round"
+        android:roundIcon="@drawable/logo"
         android:supportsRtl="true"
         android:theme="@style/AppTheme">
         <activity android:name=".MainActivity">
@@ -19,6 +19,7 @@
             </intent-filter>
         </activity>
         <activity android:name=".StoreList" />
+        <activity android:name=".ItemRandom" />
     </application>
 
 </manifest>
\ No newline at end of file
diff --git a/app/src/main/java/xyz/mtfos/buywhat/ItemRandom.kt b/app/src/main/java/xyz/mtfos/buywhat/ItemRandom.kt
new file mode 100644
index 0000000..00f1df5
--- /dev/null
+++ b/app/src/main/java/xyz/mtfos/buywhat/ItemRandom.kt
@@ -0,0 +1,223 @@
+package xyz.mtfos.buywhat
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.os.Bundle
+import android.os.Handler
+import android.os.Message
+import android.view.View
+import android.view.ViewGroup
+import android.widget.*
+import org.json.JSONArray
+import org.json.JSONObject
+import xyz.mtfos.tools.apiObject
+import xyz.mtfos.tools.objectTool.bind
+import java.util.*
+import kotlin.collections.ArrayList
+
+/**
+ * Created by jay on 2017/7/6.
+ */
+class ItemRandom : SampleActivity() {
+    private val tvTitle: TextView by bind(R.id.tvTitle)
+    private val ivRefresh: ImageView by bind(R.id.ivRefresh)
+    private val lvCommodity: ListView by bind(R.id.lvCommodity)
+    private var store_id: Int? = null
+    private var itemList: ArrayList<JSONObject> = ArrayList()
+    private var adapter: lvAdapter? = null
+    private val rangeMin: EditText by bind(R.id.rangeMin)
+    private val rangeMax: EditText by bind(R.id.rangeMax)
+    private val btnRandom: Button by bind(R.id.btnRandom)
+    private val tvResult: TextView by bind(R.id.tvResult)
+    private val ivBack: ImageView by bind(R.id.ivBack)
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setViewSource(R.layout.activity_item_random)
+
+        tvTitle?.text = intent?.getStringExtra("name")
+        store_id = intent?.getIntExtra("id", 0)
+
+        adapter = lvAdapter(this@ItemRandom, 0)
+
+        lvCommodity.adapter = adapter
+
+        lvCommodity.setOnItemClickListener({parent, view, position, id ->
+            val data: JSONObject = itemList.get(position) as JSONObject
+            var sk:Boolean = data!!["skip"] as Boolean
+            data?.put("skip", !sk)
+            itemList.set(position, data)
+            adapter?.notifyDataSetChanged()
+
+            randomItem()
+        })
+
+        btnRandom.setOnClickListener{v->
+            val json : JSONObject? = randomItem()
+            val str : String = if(json != null) {
+                "Result : ${json!!["name"]} $${json!!["price"]}"
+            }else{
+                "Result : 目標區間無商品"
+            }
+            tvResult.text = str
+        }
+
+        ivRefresh.setOnClickListener({ v ->
+            getList()
+        })
+
+        ivBack.setOnClickListener({ v ->
+            finish()
+        })
+
+        getList()
+    }
+
+    fun getList() {
+        if(store_id == 0 || store_id == null) return
+        resetView()
+        toggleLoading(true)
+        api.getItems(store_id!!, object: apiObject.apicb{
+            override fun Callback(json: JSONObject?) {
+                uiHandler.post { toggleLoading(false) }
+                if(json!!["status"] == 1) {
+                    val jarr :JSONArray = json!!["record"] as JSONArray
+                    itemList.clear()
+                    if(jarr.length() > 0) {
+                        uiHandler.sendEmptyMessage(3)
+                        for(i in 0..(jarr.length() - 1)){
+                            val tmp: JSONObject =jarr!![i] as JSONObject
+                            tmp.put("skip", false)
+                            itemList.add(tmp)
+                        }
+                    }else{
+                        uiHandler.sendEmptyMessage(2)
+                    }
+                    uiHandler.sendEmptyMessage(1)
+                }
+            }
+        })
+    }
+
+
+    fun resetView () {
+        rangeMin.setText("0")
+        rangeMax.setText("0")
+        tvResult.text = ""
+    }
+
+    fun randomItem (): JSONObject? {
+        val min: String = rangeMin.text.toString()
+        val max: String = rangeMax.text.toString()
+
+        var imin = if(min.toIntOrNull() == null) 0 else min.toInt()
+        var imax = if(max.toIntOrNull() == null) 0 else max.toInt()
+
+        val tmp: ArrayList<JSONObject> = ArrayList()
+
+        for(i in 0..(itemList.size - 1)){
+            val t:JSONObject = itemList[i]
+            var flag:Boolean = false
+
+            val price:Int = t!!["price"] as Int
+
+            if(t!!["skip"] == false){
+                if(imin == 0 && imax == 0){
+                    flag = true
+                }else if(imin > 0 && imax == 0){
+                    if(price >= imin){
+                        flag = true
+                    }
+                }else if(imin == 0 && imax > 0) {
+                    if(price <= imax) {
+                        flag = true
+                    }
+                }else{
+                    if(price in imin..imax) {
+                        flag = true
+                    }
+                }
+            }
+
+            if(flag){
+                tmp.add(t)
+            }
+        }
+
+        var arr: Array<JSONObject> = tmp.toTypedArray()
+
+        if(arr.isNotEmpty()) {
+            arr = shuffleArray(arr) as Array<JSONObject>
+        }
+
+        return if(arr.isNotEmpty()) {
+            arr[0]
+        } else {
+            null
+        }
+    }
+
+    fun shuffleArray(arr: Array<JSONObject>) : Array<JSONObject>{
+        var tmp = arr
+
+        var rand: Random = Random()
+
+        var limit: Int = 0
+        while (limit < 2) {
+            for (i in 0..(tmp.size - 1)) {
+                val pos: Int = rand.nextInt(tmp.size)
+                val a = tmp[pos]
+                tmp[pos] = tmp[i]
+                tmp[i] = a
+            }
+            limit ++
+        }
+
+        return tmp
+    }
+
+    @SuppressLint("HandlerLeak")
+    private val uiHandler = object : Handler() {
+        override fun handleMessage(msg: Message?) {
+            super.handleMessage(msg)
+            when (msg!!.what) {
+                1 -> {
+                    // update listview data
+                    adapter!!.clear()
+                    adapter!!.addAll(itemList)
+                }
+                2 -> {
+                    btnRandom.isClickable = false
+                }
+                3 -> {
+                    btnRandom.isClickable = true
+                }
+            }
+        }
+    }
+
+    class lvAdapter(context: Context, resource: Int) : ArrayAdapter<JSONObject>(context, resource) {
+
+        override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
+            val data = getItem(position) as JSONObject
+            var v: View = if (convertView == null) {
+                View.inflate(context, R.layout.listview_commodity_item, null)
+            } else {
+                convertView
+            }
+
+            val tvSkip: TextView = v.findViewById<TextView>(R.id.tvSkip)
+            tvSkip.text = if(data!!["skip"] == false){
+                context.getString(R.string.commodity_no_skip)
+            }else{
+                context.getString(R.string.commodity_skip)
+            }
+
+            val tv: TextView = v.findViewById(R.id.tvItem)
+            val name:String = data!!["name"] as String
+            val price:Int = data!!["price"] as Int
+            tv.text = "${name} $${price}"
+            return v
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/xyz/mtfos/buywhat/SampleActivity.kt b/app/src/main/java/xyz/mtfos/buywhat/SampleActivity.kt
new file mode 100644
index 0000000..8295b4c
--- /dev/null
+++ b/app/src/main/java/xyz/mtfos/buywhat/SampleActivity.kt
@@ -0,0 +1,45 @@
+package xyz.mtfos.buywhat
+
+import android.app.Activity
+import android.os.Handler
+import android.view.View
+import android.view.ViewGroup
+import android.widget.LinearLayout
+import android.widget.RelativeLayout
+import xyz.mtfos.tools.apiObject
+import xyz.mtfos.tools.objectTool.bind
+
+/**
+ * Created by jay on 2017/7/6.
+ */
+open class SampleActivity : Activity() {
+    protected val api: apiObject = apiObject(this@SampleActivity)
+    protected val layMain: RelativeLayout by bind(R.id.layMain)
+    protected val layLoading: LinearLayout by bind(R.id.layLoading)
+
+    fun setViewSource(v: View?) {
+        setContentView(v)
+        setDynView()
+    }
+
+    fun setViewSource(v: Int) {
+        setContentView(v)
+        setDynView()
+    }
+
+    fun setDynView() {
+        val loadingItem: LinearLayout = layoutInflater.inflate(R.layout.lay_loading, null) as LinearLayout
+
+        loadingItem.layoutParams = ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
+
+        layLoading?.addView(loadingItem)
+    }
+
+    fun toggleLoading(flag: Boolean) {
+        layLoading?.visibility = if (flag == true) {
+            View.VISIBLE
+        } else {
+            View.GONE
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/xyz/mtfos/buywhat/StoreList.kt b/app/src/main/java/xyz/mtfos/buywhat/StoreList.kt
index d0360c1..77ac50f 100644
--- a/app/src/main/java/xyz/mtfos/buywhat/StoreList.kt
+++ b/app/src/main/java/xyz/mtfos/buywhat/StoreList.kt
@@ -1,7 +1,6 @@
 package xyz.mtfos.buywhat
 
 import android.annotation.SuppressLint
-import android.app.Activity
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
@@ -18,28 +17,28 @@ import xyz.mtfos.tools.objectTool.bind
 /**
  * Created by jay on 2017/7/5.
  */
-class StoreList : Activity() {
+class StoreList : SampleActivity() {
     private val lv: ListView by bind(R.id.storelv)
-    private val tvTitle: TextView by bind(R.id.tvTitle)
     private val ivRefresh: ImageView by bind(R.id.ivRefresh)
-    private val api: apiObject = apiObject(this@StoreList)
     private var storeList: ArrayList<JSONObject> = ArrayList()
     private var adapter: lvAdapter? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
-        setContentView(R.layout.activity_store_list)
+        setViewSource(R.layout.activity_store_list)
 
         adapter = lvAdapter(this@StoreList, 0)
 
         lv.adapter = adapter
 
-        lv.setOnItemClickListener({parent, view, position, id ->
+        lv.setOnItemClickListener({ parent, view, position, id ->
             val data: JSONObject = storeList.get(position) as JSONObject
             val sid: Int = data!!["id"] as Int
+            val name: String = data!!["name"] as String
 
-            var intent = Intent(this@StoreList, null)
+            val intent = Intent(this@StoreList, ItemRandom::class.java)
             intent.putExtra("id", sid)
+            intent.putExtra("name", name)
             startActivity(intent)
         })
 
@@ -51,13 +50,15 @@ class StoreList : Activity() {
     }
 
     fun getList() {
+        toggleLoading(true)
         api.getStore(object : apiObject.apicb {
             override fun Callback(json: JSONObject?) {
+                uiHandler.post({ toggleLoading(false) })
                 if (json!!["status"] == 1) {
                     var jarr: JSONArray = json!!["record"] as JSONArray
-                    if(jarr.length() > 0) {
-                        storeList.clear()
-                        for(i in 0..(jarr.length() - 1)) {
+                    storeList.clear()
+                    if (jarr.length() > 0) {
+                        for (i in 0..(jarr.length() - 1)) {
                             val tmp = jarr.getJSONObject(i)
                             storeList.add(tmp)
                         }
@@ -82,13 +83,13 @@ class StoreList : Activity() {
         }
     }
 
-    class lvAdapter(context: Context, resource: Int): ArrayAdapter<JSONObject>(context, resource) {
+    class lvAdapter(context: Context, resource: Int) : ArrayAdapter<JSONObject>(context, resource) {
 
         override fun getView(position: Int, convertView: View?, parent: ViewGroup?): View {
             val data = getItem(position) as JSONObject
-            var v: View = if(convertView == null) {
+            var v: View = if (convertView == null) {
                 View.inflate(context, R.layout.listview_store_item, null)
-            }else {
+            } else {
                 convertView
             }
             val tv: TextView = v.findViewById(R.id.tvItem)
diff --git a/app/src/main/java/xyz/mtfos/tools/apiObject.kt b/app/src/main/java/xyz/mtfos/tools/apiObject.kt
index 2891cec..10087de 100644
--- a/app/src/main/java/xyz/mtfos/tools/apiObject.kt
+++ b/app/src/main/java/xyz/mtfos/tools/apiObject.kt
@@ -37,7 +37,7 @@ open class apiObject constructor(val ctx: Context) {
 
     open fun getItems(storeId: Int, cb: apicb) {
         val url:String = "${projectSet.apiUrl}/item/${storeId}"
-        var req:Request = Request.Builder()
+        val req:Request = Request.Builder()
                 .url(url)
                 .build()
         send(req, object : apicb {
diff --git a/app/src/main/res/drawable-hdpi/ic_keyboard_arrow_left_black_24dp.png b/app/src/main/res/drawable-hdpi/ic_keyboard_arrow_left_black_24dp.png
new file mode 100644
index 0000000..05b3579
Binary files /dev/null and b/app/src/main/res/drawable-hdpi/ic_keyboard_arrow_left_black_24dp.png differ
diff --git a/app/src/main/res/drawable-mdpi/ic_keyboard_arrow_left_black_24dp.png b/app/src/main/res/drawable-mdpi/ic_keyboard_arrow_left_black_24dp.png
new file mode 100644
index 0000000..22b624b
Binary files /dev/null and b/app/src/main/res/drawable-mdpi/ic_keyboard_arrow_left_black_24dp.png differ
diff --git a/app/src/main/res/drawable-xhdpi/ic_keyboard_arrow_left_black_24dp.png b/app/src/main/res/drawable-xhdpi/ic_keyboard_arrow_left_black_24dp.png
new file mode 100644
index 0000000..49ef87d
Binary files /dev/null and b/app/src/main/res/drawable-xhdpi/ic_keyboard_arrow_left_black_24dp.png differ
diff --git a/app/src/main/res/drawable-xxhdpi/ic_keyboard_arrow_left_black_24dp.png b/app/src/main/res/drawable-xxhdpi/ic_keyboard_arrow_left_black_24dp.png
new file mode 100644
index 0000000..da52e03
Binary files /dev/null and b/app/src/main/res/drawable-xxhdpi/ic_keyboard_arrow_left_black_24dp.png differ
diff --git a/app/src/main/res/drawable-xxxhdpi/ic_keyboard_arrow_left_black_24dp.png b/app/src/main/res/drawable-xxxhdpi/ic_keyboard_arrow_left_black_24dp.png
new file mode 100644
index 0000000..55f211b
Binary files /dev/null and b/app/src/main/res/drawable-xxxhdpi/ic_keyboard_arrow_left_black_24dp.png differ
diff --git a/app/src/main/res/drawable/logo.png b/app/src/main/res/drawable/logo.png
new file mode 100644
index 0000000..bec307d
Binary files /dev/null and b/app/src/main/res/drawable/logo.png differ
diff --git a/app/src/main/res/layout/activity_item_random.xml b/app/src/main/res/layout/activity_item_random.xml
new file mode 100644
index 0000000..7be9061
--- /dev/null
+++ b/app/src/main/res/layout/activity_item_random.xml
@@ -0,0 +1,166 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/layMain"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/header_height"
+            android:orientation="horizontal">
+
+            <LinearLayout
+                android:layout_width="30dp"
+                android:layout_height="match_parent"
+                android:gravity="center"
+                android:orientation="vertical">
+                <ImageView
+                    android:id="@+id/ivBack"
+                    android:layout_width="25dp"
+                    android:layout_height="25dp"
+                    android:scaleType="fitCenter"
+                    android:src="@drawable/ic_keyboard_arrow_left_black_24dp" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:gravity="center"
+                android:orientation="vertical">
+
+                <TextView
+                    android:id="@+id/tvTitle"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:textSize="20dp" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="30dp"
+                android:layout_height="match_parent"
+                android:gravity="center"
+                android:orientation="vertical">
+
+                <ImageView
+                    android:id="@+id/ivRefresh"
+                    android:layout_width="25dp"
+                    android:layout_height="25dp"
+                    android:scaleType="fitCenter"
+                    android:src="@drawable/ic_refresh_black_24dp" />
+            </LinearLayout>
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="130dp"
+            android:orientation="vertical">
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:focusable="true"
+                android:focusableInTouchMode="true"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/tv_price_range"
+                    android:textSize="15dp" />
+
+                <EditText
+                    android:id="@+id/rangeMin"
+                    android:layout_width="60dp"
+                    android:layout_height="wrap_content"
+                    android:gravity="center"
+                    android:inputType="numberDecimal"
+                    android:text="0" />
+
+                <TextView
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="~"
+                    android:textSize="15dp" />
+
+                <EditText
+                    android:id="@+id/rangeMax"
+                    android:layout_width="60dp"
+                    android:layout_height="wrap_content"
+                    android:gravity="center"
+                    android:inputType="numberDecimal"
+                    android:text="0" />
+
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical">
+
+                <Button
+                    android:id="@+id/btnRandom"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_gravity="center"
+                    android:text="@string/btn_random"
+                    android:textAllCaps="false"
+                    android:textStyle="normal" />
+
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical">
+
+                <TextView
+                    android:id="@+id/tvResult"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:textSize="20dp" />
+            </LinearLayout>
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="3dp"
+            android:layout_marginBottom="10dp"
+            android:layout_marginTop="10dp"
+            android:background="#89000000"></LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:layout_gravity="center"
+                android:text="@string/commodity_list"
+                android:textSize="20dp" />
+
+            <ListView
+                android:id="@+id/lvCommodity"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent" />
+        </LinearLayout>
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/layLoading"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical"
+        android:visibility="gone" />
+
+</RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_store_list.xml b/app/src/main/res/layout/activity_store_list.xml
index 48ce2f1..087d1bf 100644
--- a/app/src/main/res/layout/activity_store_list.xml
+++ b/app/src/main/res/layout/activity_store_list.xml
@@ -1,58 +1,72 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:id="@+id/mainLayout"
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:orientation="vertical">
-
-    <LinearLayout
-        android:layout_width="match_parent"
-        android:layout_height="30dp"
-        android:orientation="horizontal">
-
-        <LinearLayout
-            android:layout_width="30dp"
-            android:layout_height="match_parent"
-            android:orientation="vertical"></LinearLayout>
-
-        <LinearLayout
-            android:layout_width="wrap_content"
-            android:layout_height="match_parent"
-            android:layout_weight="1"
-            android:gravity="center"
-            android:orientation="vertical">
-
-            <TextView
-                android:id="@+id/tvTitle"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="@string/store_title"
-                android:textSize="20dp" />
-        </LinearLayout>
-
-        <LinearLayout
-            android:layout_width="30dp"
-            android:layout_height="match_parent"
-            android:gravity="center"
-            android:orientation="vertical">
-            <ImageView
-                android:id="@+id/ivRefresh"
-                android:layout_width="25dp"
-                android:layout_height="25dp"
-                android:scaleType="fitCenter"
-                android:src="@drawable/ic_refresh_black_24dp"/>
-        </LinearLayout>
-    </LinearLayout>
+    android:id="@+id/layMain">
 
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:orientation="vertical">
 
-        <ListView
-            android:id="@+id/storelv"
+        <LinearLayout
             android:layout_width="match_parent"
-            android:layout_height="match_parent" />
+            android:layout_height="@dimen/header_height"
+            android:orientation="horizontal">
+
+            <LinearLayout
+                android:layout_width="30dp"
+                android:layout_height="match_parent"
+                android:orientation="vertical"></LinearLayout>
+
+            <LinearLayout
+                android:layout_width="wrap_content"
+                android:layout_height="match_parent"
+                android:layout_weight="1"
+                android:gravity="center"
+                android:orientation="vertical">
+
+                <TextView
+                    android:id="@+id/tvTitle"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/store_title"
+                    android:textSize="20dp" />
+            </LinearLayout>
+
+            <LinearLayout
+                android:layout_width="30dp"
+                android:layout_height="match_parent"
+                android:gravity="center"
+                android:orientation="vertical">
+
+                <ImageView
+                    android:id="@+id/ivRefresh"
+                    android:layout_width="25dp"
+                    android:layout_height="25dp"
+                    android:scaleType="fitCenter"
+                    android:src="@drawable/ic_refresh_black_24dp" />
+            </LinearLayout>
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:orientation="vertical">
+
+            <ListView
+                android:id="@+id/storelv"
+                android:layout_width="match_parent"
+                android:layout_height="match_parent" />
+        </LinearLayout>
+
     </LinearLayout>
 
-</LinearLayout>
\ No newline at end of file
+    <LinearLayout
+        android:id="@+id/layLoading"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:gravity="center"
+        android:visibility="gone"/>
+</RelativeLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/lay_loading.xml b/app/src/main/res/layout/lay_loading.xml
new file mode 100644
index 0000000..6f13f42
--- /dev/null
+++ b/app/src/main/res/layout/lay_loading.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:layout_weight="1"
+    android:background="#33000000"
+    android:gravity="center">
+
+    <ProgressBar
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content" />
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/listview_commodity_item.xml b/app/src/main/res/layout/listview_commodity_item.xml
new file mode 100644
index 0000000..e06b7d5
--- /dev/null
+++ b/app/src/main/res/layout/listview_commodity_item.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="30dp"
+    android:orientation="horizontal">
+
+    <LinearLayout
+        android:layout_width="60dp"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:orientation="vertical">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:textSize="15dp"
+            android:id="@+id/tvSkip"/>
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical"
+        android:paddingLeft="20dp">
+
+        <TextView
+            android:id="@+id/tvItem"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Simple"
+            android:textSize="20dp" />
+    </LinearLayout>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/size.xml b/app/src/main/res/values/size.xml
new file mode 100644
index 0000000..3e8010f
--- /dev/null
+++ b/app/src/main/res/values/size.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <dimen name="header_height">35dp</dimen>
+</resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index dc1fd15..5cd8b8c 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,4 +1,9 @@
 <resources>
-    <string name="app_name">BuyWhat</string>
+    <string name="app_name">買什麼</string>
     <string name="store_title">商店列表</string>
+    <string name="commodity_list">商品列表</string>
+    <string name="commodity_skip">忽略</string>
+    <string name="commodity_no_skip">不忽略</string>
+    <string name="tv_price_range">價格區間</string>
+    <string name="btn_random">Random!!</string>
 </resources>
diff --git a/build.gradle b/build.gradle
index a7c5252..f42a728 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlin_version = '1.1.3'
+    ext.kotlin_version = '1.1.3-2'
     repositories {
         google()
         jcenter()
diff --git a/mtfos b/mtfos
new file mode 100644
index 0000000..0822d3b
Binary files /dev/null and b/mtfos differ