MainActivity.kt

package com.google.androidstudio.motionlayoutexample

import android.content.Intent
import android.os.Bundle
import android.widget.CompoundButton
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import com.google.androidstudio.motionlayoutexample.databinding.ActivityMainBinding
import com.google.androidstudio.motionlayoutexample.fragmentsdemo.FragmentExample2Activity
import com.google.androidstudio.motionlayoutexample.fragmentsdemo.FragmentExampleActivity
import com.google.androidstudio.motionlayoutexample.histogramdemo.HistogramActivity
import com.google.androidstudio.motionlayoutexample.viewpagerdemo.ViewPagerActivity
import com.google.androidstudio.motionlayoutexample.viewpagerdemo.ViewPagerActivity2
import com.google.androidstudio.motionlayoutexample.youtubedemo.YouTubeDemoActivity

class MainActivity : AppCompatActivity(), CompoundButton.OnCheckedChangeListener {
    private lateinit var recyclerView: RecyclerView
    private lateinit var viewAdapter: RecyclerView.Adapter<*>
    private lateinit var viewManager: RecyclerView.LayoutManager
    private var doShowPaths = false

    private val dataset: Array<DemosAdapter.Demo> = arrayOf(
            DemosAdapter.Demo("Basic Example (1/3)", "Basic motion example using referenced ConstraintLayout files", R.layout.motion_01_basic),
            DemosAdapter.Demo("Basic Example (2/3)", "Basic motion example using ConstraintSets defined in the MotionScene file", R.layout.motion_02_basic),
            DemosAdapter.Demo("Basic Example (3/3)", "Basic motion example same as 2, but autoComplete is set to false in onSwipe", R.layout.motion_02_basic_autocomplete_false),
            DemosAdapter.Demo("Custom Attribute", "Show color interpolation (custom attribute)", R.layout.motion_03_custom_attribute),
            DemosAdapter.Demo("ImageFilterView (1/2)", "Show image cross-fade (using ML's ImageFilterView + custom attribute)", R.layout.motion_04_imagefilter),
            DemosAdapter.Demo("ImageFilterView (2/2)", "Show image saturation transition (using ML's ImageFilterView + custom attribute)", R.layout.motion_05_imagefilter),
            DemosAdapter.Demo("Keyframe Position (1/3)", "Use a simple keyframe to change the interpolated motion", R.layout.motion_06_keyframe),
            DemosAdapter.Demo("Keyframe Interpolation (2/3)", "More complex keyframe, adding rotation interpolation", R.layout.motion_07_keyframe),
            DemosAdapter.Demo("Keyframe Cycle (3/3)", "Basic example of using a keyframe cycle ", R.layout.motion_08_cycle),
            DemosAdapter.Demo("CoordinatorLayout Example (1/3)", "Basic example of using MotionLayout instead of AppBarLayout", R.layout.motion_09_coordinatorlayout),
            DemosAdapter.Demo("CoordinatorLayout Example (2/3)", "Slightly more complex example of MotionLayout replacing AppBarLayout, with multiple elements and parallax background", R.layout.motion_10_coordinatorlayout),
            DemosAdapter.Demo("CoordinatorLayout Example (3/3)", "Another AppBarLayout replacement example", R.layout.motion_11_coordinatorlayout),
            DemosAdapter.Demo("DrawerLayout Example (1/2)", "Basic DrawerLayout with MotionLayout", R.layout.motion_12_drawerlayout),
            DemosAdapter.Demo("DrawerLayout Example (2/2)", "Advanced DrawerLayout with MotionLayout", R.layout.motion_13_drawerlayout),
            DemosAdapter.Demo("Side Panel Example", "Side Panel, implemented with MotionLayout only", R.layout.motion_14_side_panel),
            DemosAdapter.Demo("Parallax Example", "Parallax background. Drag the car.", R.layout.motion_15_parallax),
            DemosAdapter.Demo("ViewPager Example", "Using MotionLayout with ViewPager", ViewPagerActivity::class.java),
            DemosAdapter.Demo("ViewPager Lottie Example", "Using MotionLayout and Lottie with ViewPager", ViewPagerActivity2::class.java),
            DemosAdapter.Demo("Complex Motion Example (1/4)", "Basic CoordinatorLayout-like behavior. Implemented with MotionLayout only, using a moving guideline. Note the view isn't resized. ", R.layout.motion_17_coordination),
            DemosAdapter.Demo("Complex Motion Example (2/4)", "Advanced CoordinatorLayout-like behavior (adding a FAB). Implemented with MotionLayout only, using a moving guideline. Note the view isn't resized.", R.layout.motion_18_coordination),
            DemosAdapter.Demo("Complex Motion Example (3/4)", "Advanced CoordinatorLayout-like behavior (adding a FAB). Implemented with MotionLayout only, using direct resizing of the view.", R.layout.motion_19_coordination),
            DemosAdapter.Demo("Complex Motion Example (4/4)", "Advanced Synchronized reval motion + helper (bounce). Implemented with MotionLayout only.", R.layout.motion_20_reveal),
            DemosAdapter.Demo("Fragment Transition Example (1/2)", "Example showing transitioning fragments within MotionLayout", FragmentExampleActivity::class.java),
            DemosAdapter.Demo("Fragment Transition Example (2/2)", "Example showing transitioning fragments within MotionLayout", FragmentExample2Activity::class.java),
            DemosAdapter.Demo("YouTube like motion Example", "Example showing a transition like YouTube", YouTubeDemoActivity::class.java),
            DemosAdapter.Demo("Example using KeyTrigger", "Example that calls a method using KeyTrigger", R.layout.motion_25_keytrigger),
            DemosAdapter.Demo("Example using Multi State", "Example that transitions between multiple states", R.layout.motion_26_multistate),
            DemosAdapter.Demo("Histogram Example", "Advanced MotionLayout example of creating transition in code and animating dynamic data.", HistogramActivity::class.java)
    )

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val binding = ActivityMainBinding.inflate(layoutInflater)
        setContentView(binding.root)
        viewManager = LinearLayoutManager(this)
        viewAdapter = DemosAdapter(dataset)
        recyclerView = binding.recyclerview.apply {
            setHasFixedSize(true)
            layoutManager = viewManager
            adapter = viewAdapter
        }

        binding.showPaths.setOnCheckedChangeListener(this)
    }

    override fun onCheckedChanged(p0: CompoundButton?, value: Boolean) {
        doShowPaths = value
    }

    fun start(activity: Class<*>, layoutFileId: Int) {
        val intent = Intent(this, activity).apply {
            putExtra("layout_file_id", layoutFileId)
            putExtra("showPaths", doShowPaths)
        }
        startActivity(intent)
    }

}