64 lines
No EOL
2.1 KiB
Kotlin
64 lines
No EOL
2.1 KiB
Kotlin
package com.tangem.tap
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import android.app.Activity
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import android.app.Application.ActivityLifecycleCallbacks
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import android.content.Intent
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import android.os.Bundle
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import androidx.activity.result.ActivityResultLauncher
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import androidx.activity.result.contract.ActivityResultContracts
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import androidx.appcompat.app.AppCompatActivity
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import java.util.WeakHashMap
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import kotlin.reflect.KClass
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class ForegroundActivityObserver : ActivityResultCaller {
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override var activityResultLauncher: ActivityResultLauncher<Intent>? = null
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private set
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private val activities = WeakHashMap<KClass<out Activity>, AppCompatActivity>()
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val foregroundActivity: AppCompatActivity?
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get() = activities.entries
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.filterNot { it.value.isDestroyed }
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.firstOrNull()
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?.value
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internal val callbacks: ActivityLifecycleCallbacks
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get() = Callbacks()
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internal inner class Callbacks : ActivityLifecycleCallbacks {
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override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {
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activityResultLauncher = (activity as? AppCompatActivity)?.registerForActivityResult(
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ActivityResultContracts.StartActivityForResult(),
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) {
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/* no-op */
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}
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}
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override fun onActivityResumed(activity: Activity) {
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activities[activity::class] = activity as? AppCompatActivity
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}
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override fun onActivityDestroyed(activity: Activity) {
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activities.remove(activity::class)
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if (activities.isEmpty()) {
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activityResultLauncher = null
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}
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}
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override fun onActivityStarted(activity: Activity) {
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}
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override fun onActivityPaused(activity: Activity) {
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}
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override fun onActivityStopped(activity: Activity) {
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}
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override fun onActivitySaveInstanceState(activity: Activity, outState: Bundle) {
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}
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}
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}
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fun ForegroundActivityObserver.withForegroundActivity(block: (AppCompatActivity) -> Unit) {
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foregroundActivity?.let { block(it) }
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} |