停止运行

Question

在我之前的问题中，我找到了这样的答案：

Handler visibilityToggler;
Runnable visivilityRunnable;


  visibilityToggler = new Handler();

        visivilityRunnable = new Runnable() {
            @Override
            public void run() {

                 // isUserClickedButton is used to keep record if user has pressed button within 1 sec
                //  keep isUserClickedButton = true for first time as it will run 
                if (!isUserClickedButton) {

                    // user not pressed button
                    Toast.makeText(context,"You are not pressed the Button",Toast.LENGHT_LONG).show();
                }

                // toggle visibility
                Random generator = new Random();
                number = generator.nextInt(16);

                for (int i = 0; i < buttons.length; i++) {
                    if (i == number)
                        buttons[i].setVisibility(View.VISIBLE);
                    else
                        buttons[i].setVisibility(View.INVISIBLE);
                }

            // again start the visibility 
              visibilityToggler.postDelayed(visivilityRunnable,1000);

                // make it false as visibility is toggled and we want to track button pressed from start
                isUserClickedButton = false;


            }
        };

visibilityToggler.postDelayed(visivilityRunnable,1000);

现在我的问题是：如何停止 Runnable？
谁能给个代码示例？

更新：

我在按钮上使用了 removecallbacks()

          public void onClick(View v){
             visibilityToggler.removeCallbacks(visivilityRunnable);
             }

但是runnable没有停止，有人可以帮忙吗？

Answer 1

在处理程序外定义可运行对象。然后在要停止处理程序的位置调用 handler.removeCallbacks(visivilityRunnable);。

Answer 2

我不确定你是否想打破循环，但如果我理解你的话，我会建议你创建一个静态布尔变量并在需要时停止它

public static boolean isWorking=true;
  for (int i = 0; i < buttons.length; i++) {
                if(isWork){
                if (i == number)
                    buttons[i].setVisibility(View.VISIBLE);
                else
                    buttons[i].setVisibility(View.INVISIBLE);
            }else break;}

现在，如果您想打破循环，只需将 isWork 更改为 false

停止运行

Stop a Runnable

java

android

handler

runnable