Added library's setup and usage section to README.md

Author: intret

README.md

@@ -1,11 +1,104 @@
 # LoadingToggleButton
+LoadingToggleButton is a toggle button shows loading animation when toggled, from 'checked' to 'unchecked', or from 'unchecked' to 'checked'.
 
+| Design                                  | Screenshot               |
+| --------------------------------------- | ------------------------ |
+| ![](docs/LoadingToggleButtonDesign.png) | ![](docs/screenshot.png) |
 
-A toggle button shows loading animation when toggled from 'off' to 'on' status.
+# Install
 
-## * Work In Pregress
+LoadingToggleButton is available on [JitPack](https://jitpack.io/#intret/LoadingToggleButton).
 
-![](docs/screenshot.png)
+[![](https://jitpack.io/v/intret/LoadingToggleButton.svg)](https://jitpack.io/#intret/LoadingToggleButton)
+
+**Step 1.** Add the JitPack repository to your build file
+
+Add it in your root build.gradle at the end of repositories:
+
+```groovy
+    allprojects {
+		repositories {
+			...
+			maven { url 'https://jitpack.io' }
+		}
+	}
+```
+
+**Step 2.** Add the dependency
+
+```groovy
+    dependencies {
+	        compile 'com.github.intret:LoadingToggleButton:master-SNAPSHOT'
+	}
+```
+
+See detailed available versions at https://jitpack.io/#intret/LoadingToggleButton
+
+## Usage
+
+**Add toggle button to .xml layout file:**
+
+```xml
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context="cn.intret.lab.loadingtogglebuttondemo.MainActivity">
+
+
+    <cn.intret.lab.library.LoadingToggleButton
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        android:layout_marginTop="16dp"
+        app:ltbToggleChecked="true"
+        app:ltbBackgroundCheckedColor="@android:color/black"
+        app:ltbBackgroundUncheckedColor="@android:color/darker_gray"
+        app:ltbTogglePadding="2dp"
+
+        app:ltbIndicatorVisibility="show"
+        app:ltbIndicatorAnimationType="lineSpinner"
+        app:ltbIndicatorAnimatingWhen="toggleToOn|toggleToOff"
+        />
+
+</android.support.constraint.ConstraintLayout>
+```
+
+**In your code**
+
+Example in Kotlin language (Java is also easy):
+
+```kotlin
+class MainActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        val toggle = findViewById<LoadingToggleButton>(R.id.btn_toggle)
+
+        // LoadingToggleButton interaction event
+        toggle.setOnCheckChangeListener {loadingToggleButton, checked ->
+            Log.d("DEMO", "toggle button is checked = " + checked)
+        }
+
+        toggle.setOnLoadingChangeListener { loadingToggleButton, isLoading ->
+            Log.d("DEMO", "toggle button loading animation is showing = " + isLoading)
+        }
+        
+        // show loading indicator animation
+        btn_start_loading.setOnClickListener { toggle.start() }
+        
+        // hide loading indicator animation
+        btn_start_loading.setOnClickListener { toggle.stop() }
+    }
+}
+```
 
 ## License