为什么阻塞线程导致浮窗打不开？

Question

class MyAccessibilityService : AccessibilityService() {
  override fun onServiceConnected() {
    super.onServiceConnected()
    windowManager = getSystemService(Context.WINDOW_SERVICE) as WindowManager
    showOverlay()
  }

  private fun showOverlay() {   
    // omitted about composeView code
    
    windowManager.addView(composeView, params)

    runBlocking(newSingleThreadContext("MyOwnThread")) {
      while (true) {
        delay(1000 * 10)
        windows.forEach { println(it) }
     }
   }
  }
}

为什么在

runBlocking

之后用

windowManager.addView

阻塞线程导致浮窗不起作用？

我看不出两者之间有任何联系吗？

Answer 1

你在阻止

onServiceConnected()

返回，因此操作系统甚至无法完成设置并继续其生命周期。

您需要在服务被销毁时取消的范围内运行协程，否则您将永远泄漏所有内容。像这样的东西：

class MyAccessibilityService : AccessibilityService() {
  private val lifecycleScope = MainScope() + CoroutineName("MyAccessibilityService lifecycleScope")

  override fun onDestroy() {
    super.onDestroy()
    lifecycleScope.cancel()
  }

  override fun onServiceConnected() {
    super.onServiceConnected()
    windowManager = getSystemService(Context.WINDOW_SERVICE) as WindowManager
    showOverlay()
  }

  private fun showOverlay() {   
    // omitted about composeView code
    
    windowManager.addView(composeView, params)

    lifecycleScope.launch {
      while (true) {
        delay(1000 * 10)
        windows.forEach { println(it) }
     }
   }
  }
}