Kotlin - 闪烁文本的最简单方法(可见/不可见)
Kotlin - Easiest way to blink text (visible / invisible)
我正在尝试使文本闪烁(基于之前的按钮点击),但我的应用程序在 1000 毫秒/2000 毫秒后崩溃。
我试过创建一个线程,但我不确定这是否是最简单的方法。有人可以帮助我吗?
这是我当前的代码:
fun toggleBlinkCounterUI() {
/*var handler: Handler = Handler();
Thread(Runnable() {
override fun run() {
var timeToBlink: Long = 1000;
Thread.sleep(timeToBlink)
handler.post(Runnable() {
fun run() {
if (binding.exerciseTimer.visibility == View.VISIBLE){
binding.exerciseTimer.visibility = View.INVISIBLE
} else {
binding.exerciseTimer.visibility = View.VISIBLE
}
toggleBlinkCounterUI();
}
});
}
}).start();*/
/*val thread = Thread {
var timeToBlink: Long = 1000;
while (1 == 1) {
Thread.sleep(timeToBlink)
if (binding.exerciseTimer.visibility == View.VISIBLE){
binding.exerciseTimer.visibility = View.INVISIBLE
} else {
binding.exerciseTimer.visibility = View.VISIBLE
}
}
}
thread.start()*/
提前致谢
使用Handler and make use of its postDelayed方法。当你想改变 UI 时,你需要使用主循环程序:val uiCallbackHandler: Handler = Handler(Looper.getMainLooper())
。除此之外你还需要两件事:
- 创建 Runnable 来定义您的 UI 交替逻辑
- Post 延迟了您当前用于线程休眠的 1000 毫秒。
结合使用我的建议和您的代码(我也让它更像 Kotlin):
val handler = Handler(Looper.getMainLooper())
val switchVisibilityRunnable = Runnable {
binding.exerciseTimer.isVisible = !binding.exerciseTimer.isVisible
handler.postDelayed(switchVisibilityRunnable, 1000)
}
handler.post(switchVisibilityRunnable)
我正在尝试使文本闪烁(基于之前的按钮点击),但我的应用程序在 1000 毫秒/2000 毫秒后崩溃。
我试过创建一个线程,但我不确定这是否是最简单的方法。有人可以帮助我吗?
这是我当前的代码:
fun toggleBlinkCounterUI() {
/*var handler: Handler = Handler();
Thread(Runnable() {
override fun run() {
var timeToBlink: Long = 1000;
Thread.sleep(timeToBlink)
handler.post(Runnable() {
fun run() {
if (binding.exerciseTimer.visibility == View.VISIBLE){
binding.exerciseTimer.visibility = View.INVISIBLE
} else {
binding.exerciseTimer.visibility = View.VISIBLE
}
toggleBlinkCounterUI();
}
});
}
}).start();*/
/*val thread = Thread {
var timeToBlink: Long = 1000;
while (1 == 1) {
Thread.sleep(timeToBlink)
if (binding.exerciseTimer.visibility == View.VISIBLE){
binding.exerciseTimer.visibility = View.INVISIBLE
} else {
binding.exerciseTimer.visibility = View.VISIBLE
}
}
}
thread.start()*/
提前致谢
使用Handler and make use of its postDelayed方法。当你想改变 UI 时,你需要使用主循环程序:val uiCallbackHandler: Handler = Handler(Looper.getMainLooper())
。除此之外你还需要两件事:
- 创建 Runnable 来定义您的 UI 交替逻辑
- Post 延迟了您当前用于线程休眠的 1000 毫秒。
结合使用我的建议和您的代码(我也让它更像 Kotlin):
val handler = Handler(Looper.getMainLooper())
val switchVisibilityRunnable = Runnable {
binding.exerciseTimer.isVisible = !binding.exerciseTimer.isVisible
handler.postDelayed(switchVisibilityRunnable, 1000)
}
handler.post(switchVisibilityRunnable)