kotlin ku

KIntroActivity.kt

package com.kubuskotak.gazo.ui

import android.content.pm.ActivityInfo
import android.database.DataSetObserver
import android.os.Bundle
import android.os.Parcelable
import android.support.v4.view.PagerAdapter
import android.support.v4.view.ViewPager
import android.view.View
import android.view.ViewGroup
import android.view.Window
import android.view.animation.Animation
import android.view.animation.AnimationUtils
import android.widget.ImageView
import com.kubuskotak.gazo.R
import com.kubuskotak.gazo.ui.base.activity.BaseActivity
import kotlinx.android.synthetic.main.intro_layout.*
import kotlinx.android.synthetic.main.intro_view_layout.view.*
import timber.log.Timber

/**
 * Created by echo on 5/21/16.
 */
class KIntroActivity : BaseActivity() {
    private val TAG = javaClass.simpleName

    private val viewPager: ViewPager by lazy {
        intro_view_pager
    }
    private val topImage1: ImageView by lazy {
        icon_image1
    }
    private val topImage2: ImageView by lazy {
        icon_image2
    }
    private val bottomPages: ViewGroup by lazy {
        bottom_pages
    }

    private var lastPage = 0
    private var justCreated = false
    private var startPressed = false

    private val icons by lazy {
        arrayOf(
                R.drawable.intro1,
                R.drawable.intro2,
                R.drawable.intro3,
                R.drawable.intro4,
                R.drawable.intro5,
                R.drawable.intro6,
                R.drawable.intro7
        )
    }

    private val titles by lazy {
        arrayOf(
                R.string.Page1Title,
                R.string.Page2Title,
                R.string.Page3Title,
                R.string.Page4Title,
                R.string.Page5Title,
                R.string.Page6Title,
                R.string.Page7Title
        )
    }

    private val messages by lazy {
        arrayOf(
                R.string.Page1Message,
                R.string.Page2Message,
                R.string.Page3Message,
                R.string.Page4Message,
                R.string.Page5Message,
                R.string.Page6Message,
                R.string.Page7Message
        )
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        requestWindowFeature(Window.FEATURE_NO_TITLE)
        setContentView(R.layout.intro_layout)
        requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT

        val startMessagingButton = start_messaging_button
        startMessagingButton.text = getString(R.string.StartMessaging).toUpperCase()

        topImage2.visibility = View.GONE

        with(viewPager) {
            adapter = IntroAdapter()
            pageMargin = 0
            offscreenPageLimit = 1
            addOnPageChangeListener(object : ViewPager.OnPageChangeListener {

                override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {
                }

                override fun onPageSelected(position: Int) {
                }

                override fun onPageScrollStateChanged(state: Int) {
                    if (state == ViewPager.SCROLL_STATE_IDLE || state == ViewPager.SCROLL_STATE_SETTLING) {
                        if (lastPage != currentItem) {
                            lastPage = currentItem
                            Timber.e(TAG, lastPage.toString())

                            val (fadeOutImage, fadeInImage) = if (topImage1.visibility == View.VISIBLE) {
                                Pair(topImage1, topImage2)
                            } else {
                                Pair(topImage2, topImage1)
                            }

                            with(fadeInImage) {
                                bringToFront()
                                setImageResource(icons[lastPage])
                                clearAnimation()
                            }
                            fadeOutImage.clearAnimation()

                            val outAnimation = AnimationUtils
                                    .loadAnimation(this@KIntroActivity, R.anim.icon_anim_fade_out);
                            outAnimation.setAnimationListener(object : Animation.AnimationListener {

                                override fun onAnimationStart(animation: Animation?) {
                                }

                                override fun onAnimationEnd(animation: Animation?) {
                                    fadeOutImage.visibility = View.GONE
                                }

                                override fun onAnimationRepeat(animation: Animation?) {
                                }
                            })

                            val inAnimation = AnimationUtils.
                                    loadAnimation(this@KIntroActivity, R.anim.icon_anim_fade_in)
                            inAnimation.setAnimationListener(object : Animation.AnimationListener {

                                override fun onAnimationStart(animation: Animation?) {
                                    fadeInImage.visibility = View.VISIBLE
                                }

                                override fun onAnimationEnd(animation: Animation?) {
                                }

                                override fun onAnimationRepeat(animation: Animation?) {
                                }
                            })

                            fadeOutImage.startAnimation(outAnimation)
                            fadeInImage.startAnimation(inAnimation)
                        }
                    }
                }
            })
        }

        startMessagingButton.setOnClickListener { view ->
            if (startPressed) {
            }
        }

        justCreated = true
    }

    override fun onResume() {
        super.onResume()

        if (justCreated) {
            viewPager.currentItem = 0
            lastPage = 0

            justCreated = false
        }
    }

    override fun onPause() {
        super.onPause()
    }

    inner class IntroAdapter : PagerAdapter() {

        override fun getCount(): Int {
            return 7
        }

        override fun instantiateItem(container: ViewGroup, position: Int): Any? {
            val view = View.inflate(container.context, R.layout.intro_view_layout, null)
            container.addView(view, 0)

            // problem di class dum, langsung pakai header_text tanpa view, jadinya run
            view.header_text.text = getString(titles[position])
            view.message_text.text = getString(messages[position])

            return view
        }

        override fun destroyItem(container: ViewGroup, position: Int, obj: Any) {
            container.removeView(obj as View)
        }

        override fun setPrimaryItem(container: ViewGroup, position: Int, obj: Any) {
            super.setPrimaryItem(container, position, obj)
            val count = bottomPages.childCount
            for (index in 0 until count) {
                val child = bottomPages.getChildAt(index)
                child.setBackgroundColor(
                        if (index == position) 0xff2ca5e0.toInt() else 0xffbbbbbb.toInt())
            }
        }

        override fun isViewFromObject(view: View, obj: Any): Boolean {
            return view == obj
        }

        override fun restoreState(state: Parcelable?, loader: ClassLoader?) {

        }

        override fun saveState(): Parcelable? {
            return null
        }

        override fun unregisterDataSetObserver(observer: DataSetObserver?) {
            observer?.let { super.unregisterDataSetObserver(observer) }
        }
    }
}