worker8

SpeakerDeck Slide: https://speakerdeck.com/worker8/how-i-22stole-22-psi-from-android-studio-droidkaigi2026

Kotlin PSI MCP Github: https://github.com/mercari/kotlin-psi-mcp

JetBrains Plugin Marketplace: https://plugins.jetbrains.com/plugin/33755-kotlin-psi-mcp

worker8

fun main() {
//    coldFlow()
    hotFlow()
}

fun coldFlow() {
    val scope = CoroutineScope(Dispatchers.IO)
    var count = 10
    val coldFlow = flow {
        while (count > 0) {

worker8

/* // use side
 * channelAvatarPicture.setOnClickListener {
 *     startActivityForResult(Intent(this@ChannelActivity, ImagePickingActivity::class.java), ImagePickingActivity.REQUEST_IMAGE_CAPTURE)
 * }
 *  override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
 *     super.onActivityResult(requestCode, resultCode, data)
 *     if (requestCode == ImagePickingActivity.REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
 *         data?.getStringExtra(ImagePickingActivity.CHOSEN_IMAGE_PATH)?.ofType<String> { chosenImagePath ->
 *             // use 'chosenImagePath'
 *         }

worker8

import android.content.Context
import android.content.SharedPreferences
import android.preference.PreferenceManager

fun Context.defaultPrefs(): SharedPreferences = PreferenceManager.getDefaultSharedPreferences(this)
fun Context.customPrefs(name: String): SharedPreferences = getSharedPreferences(name, Context.MODE_PRIVATE)

fun SharedPreferences.save(key: String, value: Any) {
    edit().apply {
        when (value) {

worker8

    override fun onTouchEvent(event: MotionEvent): Boolean {
        // swapping the motionEvent's x and y, so that when finger moves right, it becomes moving down
        // for VerticalViewPager effect
        event.swapXY()

        // this portion is used for injection ACTION_DOWN
        if (firstTime && event.actionMasked == MotionEvent.ACTION_MOVE) {
            injectActionDown(event)
            firstTime = false
        }

worker8

    override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
        val action = event.actionMasked
        val currentPoint = Point(event.x.toInt(), event.y.toInt())

        if (action == MotionEvent.ACTION_DOWN) {
            // mark the beginning, when finger touched down
            initialTouchPoint = Point(currentPoint)
        } else if (action == MotionEvent.ACTION_UP) {
            // reset the marking, when finger is lifted up
            initialTouchPoint = Point(0, 0)

worker8

    override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
        val action = event.actionMasked
        val currentPoint = Point(event.x.toInt(), event.y.toInt())

        if (action == MotionEvent.ACTION_DOWN) {
            // mark the beginning, when finger touched down
            initialTouchPoint = Point(currentPoint)
        } else if (action == MotionEvent.ACTION_UP) {
            // reset the marking, when finger is lifted up
            initialTouchPoint = Point(0, 0)

worker8

    override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
        val action = event.actionMasked
        val currentPoint = Point(event.x.toInt(), event.y.toInt())

        if (action == MotionEvent.ACTION_DOWN) {
            // mark the beginning, when finger touched down
            initialTouchPoint = Point(currentPoint)
        } else if (action == MotionEvent.ACTION_UP) {
            // reset the marking, when finger is lifted up
            initialTouchPoint = Point(0, 0)

worker8

class RandomAdapter(val dataArray: List) : AccordionAdapter {
    override fun onCreateViewHolderForTitle(parent: ViewGroup): AccordionView.ViewHolder {
        return TitleViewHolder.create(parent)
    }

    override fun onCreateViewHolderForContent(parent: ViewGroup): AccordionView.ViewHolder {
        return ContentViewHolder.create(parent)
    }

    override fun onBindViewForTitle(viewHolder: AccordionView.ViewHolder, position: Int, arrowDirection: AccordionAdapter.ArrowDirection) {

worker8

interface AccordianAdapter {
    fun onCreateViewHolderForTitle(parent: ViewGroup): AccordionView.ViewHolder
    fun onCreateViewHolderForContent(parent: ViewGroup): AccordionView.ViewHolder
    fun onBindViewForTitle(viewHolder: AccordionView.ViewHolder, position: Int, arrowDirection: ArrowDirection)
    fun onBindViewForContent(viewHolder: AccordionView.ViewHolder, position: Int)
    fun getItemCount(): Int
}