sorce code added

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+apply plugin: 'kotlin-android'
+
+apply plugin: 'kotlin-android-extensions'
+
+android {
+    compileSdkVersion 28
+    defaultConfig {
+        applicationId "com.greylabs.gcsample"
+        minSdkVersion 19
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation 'com.android.support:appcompat-v7:28.0.0'
+    implementation 'com.android.support:design:28.0.0'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+    implementation project (':gradientcomponents')
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/greylabs/grc/ExampleInstrumentedTest.kt

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+package com.greylabs.grc
+
+import android.support.test.InstrumentationRegistry
+import android.support.test.runner.AndroidJUnit4
+
+import org.junit.Test
+import org.junit.runner.RunWith
+
+import org.junit.Assert.*
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+@RunWith(AndroidJUnit4::class)
+class ExampleInstrumentedTest {
+    @Test
+    fun useAppContext() {
+        // Context of the app under test.
+        val appContext = InstrumentationRegistry.getTargetContext()
+        assertEquals("com.greylabs.gcsample", appContext.packageName)
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.greylabs.grc">
+
+    <application
+            android:allowBackup="true"
+            android:icon="@mipmap/ic_launcher"
+            android:label="@string/app_name"
+            android:roundIcon="@mipmap/ic_launcher_round"
+            android:supportsRtl="true"
+            android:theme="@style/AppTheme">
+        <activity android:name="com.greylabs.grc.MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/greylabs/grc/MainActivity.kt

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+package com.greylabs.grc
+
+import android.os.Build
+import android.support.v7.app.AppCompatActivity
+import android.os.Bundle
+import android.view.WindowManager
+import com.greylabs.grc.screens.backdrop_fragments_controller.*
+import kotlinx.android.synthetic.main.activity_main.*
+
+const val CONST_ANIMATION_DURATION = 250L
+
+class MainActivity : AppCompatActivity(), BackdropStatusListener {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+
+        this.window.setFlags(
+            WindowManager.LayoutParams.FLAG_FULLSCREEN,
+            WindowManager.LayoutParams.FLAG_FULLSCREEN
+        )
+        setContentView(R.layout.activity_main)
+
+        BackdropFragmentsController.init(
+            this@MainActivity, supportFragmentManager,
+            backdrop_bottom_container.id
+        )
+        BackdropFragmentsController.backdropStatusListener = this@MainActivity
+
+        initViews()
+        initListeners()
+        setupToolbar()
+    }
+
+    private fun setupToolbar() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+            appBar.outlineProvider = null
+        }
+    }
+
+    private fun initViews() {
+        BackdropFragmentsController.showFragmentWithOrdering(
+            FragmentTypeOrdered.BottomExamplesView(),
+            FragmentContainerType.BottomFragment
+        )
+
+        button_text_stroke.scaleX = 0f
+        button_text_stroke.scaleY = 0f
+    }
+
+    private fun initListeners() {
+        button_view.setOnClickListener {
+            button_view_stroke.animate().scaleX(1f).setDuration(CONST_ANIMATION_DURATION).start()
+            button_view_stroke.animate().scaleY(1f).setDuration(CONST_ANIMATION_DURATION).start()
+            button_text_stroke.animate().scaleX(0f).setDuration(CONST_ANIMATION_DURATION).start()
+            button_text_stroke.animate().scaleY(0f).setDuration(CONST_ANIMATION_DURATION).start()
+
+            if (BackdropFragmentsController.showFragmentWithOrdering(
+                    FragmentTypeOrdered.BottomExamplesView(),
+                    FragmentContainerType.BottomFragment
+                )
+            ) {
+                moveBackdrop()
+            }
+        }
+        button_text.setOnClickListener {
+            button_view_stroke.animate().scaleX(0f).setDuration(CONST_ANIMATION_DURATION).start()
+            button_view_stroke.animate().scaleY(0f).setDuration(CONST_ANIMATION_DURATION).start()
+            button_text_stroke.animate().scaleX(1f).setDuration(CONST_ANIMATION_DURATION).start()
+            button_text_stroke.animate().scaleY(1f).setDuration(CONST_ANIMATION_DURATION).start()
+
+            if (BackdropFragmentsController.showFragmentWithOrdering(
+                    FragmentTypeOrdered.BottomExamplesText(),
+                    FragmentContainerType.BottomFragment
+                )
+            ) {
+                moveBackdrop()
+            }
+        }
+        image_button_menu.setOnClickListener {
+            moveBackdrop()
+        }
+    }
+
+    private fun moveBackdrop() {
+        BackdropFragmentsController.currentBackdropBottomFragment?.moveBackdrop()
+    }
+
+    override fun onBackdropStatusChanged(isOpened: Boolean) {
+        gradient_decor_panel.animate().rotation(if (isOpened) 90f else 0f).setDuration(CONST_ANIMATION_DURATION).start()
+    }
+}

app/src/main/java/com/greylabs/grc/screens/backdrop_fragments_controller/BackdropFragment.kt

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+package com.greylabs.grc.screens.backdrop_fragments_controller
+
+import android.support.v4.app.Fragment
+
+interface BackdropStatusListener {
+    fun onBackdropStatusChanged(isOpened: Boolean)
+}
+
+abstract class BackdropFragment : Fragment() {
+
+    abstract fun moveBackdrop()
+
+    protected fun setBackdropTopContainer(containerId: Int) {
+        BackdropFragmentsController.setTopContainer(containerId)
+    }
+
+
+}