add ListenerExt

app/src/main/AndroidManifest.xml

@@ -33,6 +33,7 @@
         <activity android:name="luyao.util.ktx.ui.SharedPreferencesActivity"/>
         <activity android:name="luyao.util.ktx.ui.ActivityExtActivity"/>
         <activity android:name="luyao.util.ktx.ui.AnotherActivity"/>
+        <activity android:name="luyao.util.ktx.ui.ListenerExtActivity"/>
     </application>
 
 </manifest>

app/src/main/java/luyao/util/ktx/ui/ExtActivity.kt

@@ -16,6 +16,7 @@ class ExtActivity : CommonListActivity() {
             add(ItemBean("ToastExt", ToastExtActivity::class.java))
             add(ItemBean("AppExt", ToastExtActivity::class.java))
             add(ItemBean("IntentExt", IntentExtActivity::class.java))
+            add(ItemBean("ListenerExtActivity", ListenerExtActivity::class.java))
             add(ItemBean("PermissionExt",PermissionExtActivity::class.java))
             add(ItemBean("SharedPreferencesExt",SharedPreferencesActivity::class.java))
         }

app/src/main/java/luyao/util/ktx/ui/ListenerExtActivity.kt

@@ -0,0 +1,31 @@
+package luyao.util.ktx.ui
+
+import kotlinx.android.synthetic.main.activity_listener.*
+import kotlinx.android.synthetic.main.title_layout.*
+import luyao.ktx.R
+import luyao.util.ktx.base.BaseActivity
+import luyao.util.ktx.ext.textWatcher
+import luyao.util.ktx.ext.toast
+
+/**
+ * Created by luyao
+ * on 2019/7/9 16:24
+ */
+class ListenerExtActivity : BaseActivity() {
+
+    override fun getLayoutResId() = R.layout.activity_listener
+
+    override fun initView() {
+        mToolbar.title = "ListenerExtActivity"
+    }
+
+    override fun initData() {
+        listenerEt.textWatcher {
+            onTextChanged { s, start, before, count ->
+                toast(s.toString())
+            }
+
+            afterTextChanged { toast(it.toString()) }
+        }
+    }
+}

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

@@ -0,0 +1,14 @@
+<?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:background="@color/light_gray">
+
+    <include layout="@layout/title_layout"/>
+
+    <androidx.appcompat.widget.AppCompatEditText
+            android:id="@+id/listenerEt"
+            style="@style/NormalEditText"/>
+
+</LinearLayout>

app/src/main/res/values/mainStyles.xml

@@ -14,4 +14,23 @@
         <item name="android:textColor">@color/black</item>
         <item name="android:background">@drawable/ripple</item>
     </style>
+
+    <style name="NormalEditText">
+        <item name="android:layout_width">match_parent</item>
+        <item name="android:layout_height">wrap_content</item>
+        <item name="android:textAllCaps">false</item>
+        <item name="android:padding">2dp</item>
+        <item name="android:minHeight">40dp</item>
+        <item name="android:layout_marginBottom">5dp</item>
+        <item name="android:layout_marginTop">5dp</item>
+        <item name="android:layout_marginLeft">10dp</item>
+        <item name="android:layout_marginRight">10dp</item>
+        <item name="android:textSize">16sp</item>
+        <item name="android:textColor">@color/black</item>
+        <item name="android:background">@color/white</item>
+        <item name="android:focusable">true</item>
+        <item name="android:focusableInTouchMode">true</item>
+        <item name="android:hint">Please Input</item>
+        <item name="android:cursorVisible">true</item>
+    </style>
 </resources>

ktx/src/main/java/luyao/util/ktx/ext/ListenerExt.kt

@@ -0,0 +1,46 @@
+package luyao.util.ktx.ext
+
+import android.text.Editable
+import android.text.TextWatcher
+import android.widget.TextView
+
+/**
+ * Created by luyao
+ * on 2019/7/9 16:13
+ */
+
+fun TextView.textWatcher(watcher: KtxTextWatcher.() -> Unit) =
+    addTextChangedListener(KtxTextWatcher().apply(watcher))
+
+class KtxTextWatcher : TextWatcher {
+
+    private var _afterTextChanged: ((Editable?) -> Unit)? = null
+    private var _beforeTextChanged: ((CharSequence?, Int, Int, Int) -> Unit)? = null
+    private var _onTextChanged: ((CharSequence?, Int, Int, Int) -> Unit)? = null
+
+
+    fun afterTextChanged(listener: ((Editable?) -> Unit)) {
+        _afterTextChanged = listener
+    }
+
+    fun beforeTextChanged(listener: (CharSequence?, Int, Int, Int) -> Unit) {
+        _beforeTextChanged = listener
+    }
+
+    fun onTextChanged(listener: (CharSequence?, Int, Int, Int) -> Unit) {
+        _onTextChanged = listener
+    }
+
+    override fun afterTextChanged(s: Editable?) {
+        _afterTextChanged?.invoke(s)
+    }
+
+    override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
+        _beforeTextChanged?.invoke(s, start, count, after)
+    }
+
+    override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
+        _onTextChanged?.invoke(s, start, before, count)
+    }
+
+}