问题
I have array with more elements than posted here. I show only 2 in post but there are 10 showGreen variables, 10 additional threads, 10 "TextViews" and 10 isGreenBackgroundShouldAppear functions. As you see, when answer is correct, TextView1 or TextView2 becomes green on ACTION_DOWN and sets random image in image_view thus preparing next question. The problem is that if I use 10 threads which separately set value of answer for every TextView every 500ms, if user press correct answer TextView too fast, it will be treated as wrong answer (red). If I set from 500ms to 300ms or less, sometimes showGreen never gets updated correctly. Do you maybe know any solution for my problem?
class Cats : AppCompatActivity() {
var cats = intArrayOf(
R.drawable.cat1,
R.drawable.cat2,
R.drawable.cat3,
R.drawable.cat4,
R.drawable.cat5,
R.drawable.cat6,
R.drawable.cat7,
R.drawable.cat8,
R.drawable.cat9,
R.drawable.cat10,
R.drawable.cat11,
R.drawable.cat12,
R.drawable.cat13,
R.drawable.cat14,
R.drawable.cat15,
R.drawable.cat16,
R.drawable.cat17
)
lateinit var random: Random
var showGreen1 = false
var showGreen2 = false
val runnable1 = Runnable {
while (true) {
showGreen1 = isGreenBackgroundShouldAppear1()
Thread.sleep(500)
}
}
val runnable2 = Runnable {
while (true) {
showGreen2 = isGreenBackgroundShouldAppear2()
Thread.sleep(500)
}
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
random = Random()
Thread(runnable1).start()
Thread(runnable2).start()
TextView1.setOnTouchListener(View.OnTouchListener { view, motionEvent ->
when (motionEvent.action) {
MotionEvent.ACTION_DOWN -> {
if (showGreen1) {
TextView1.setBackgroundResource(R.color.green);
image_view.setImageResource(cats[random.nextInt(cats.size)])
/*showGreen1 = isGreenBackgroundShouldAppear1()
showGreen2 = isGreenBackgroundShouldAppear2()*/
} else {
TextView1.setBackgroundResource(R.color.red);
}
}
MotionEvent.ACTION_UP -> {
TextView1.setBackgroundResource(R.color.white)
}
}
return@OnTouchListener true
})
TextView2.setOnTouchListener(View.OnTouchListener { view, motionEvent ->
when (motionEvent.action) {
MotionEvent.ACTION_DOWN -> {
if (showGreen2) {
TextView2.setBackgroundResource(R.color.green);
image_view.setImageResource(cats[random.nextInt(cats.size)])
} else {
TextView2.setBackgroundResource(R.color.red);
}
}
MotionEvent.ACTION_UP -> {
TextView2.setBackgroundResource(R.color.white)
}
}
return@OnTouchListener true
})
/*while(true)
{
showGreen1 = isGreenBackgroundShouldAppear1()
showGreen2 = isGreenBackgroundShouldAppear2()
}*/
fun isGreenBackgroundShouldAppear1(): Boolean {
return image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat1
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat2
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat3
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat4
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat5
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat6
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat7
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat8
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat9
)?.constantState
}
fun isGreenBackgroundShouldAppear2(): Boolean {
return image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat10
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat11
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat12
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat13
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat14
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat15
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat16
)?.constantState ||
image_view.drawable.constantState == ContextCompat.getDrawable(
this,
R.drawable.cat17
)?.constantState
}
}
来源：https://stackoverflow.com/questions/59523159/how-to-solve-latency-issue-in-quiz-application