android实现倒计时 有多easy?

private static class LoadingAnimator { private final Button targetButton; private final String baseText; private final Handler handler = new Handler(Looper.getMainLooper()); // 修改：定义倒计时剩余时间 private int timeLeft = 10; private boolean isRunning = false; private final Runnable animateRunnable = new Runnable() { @Override public void run() { if (!isRunning) return; // 修改：显示倒计时，例如 "通讯中(10s)" targetButton.setText(baseText + "(" + timeLeft + "s)"); // 倒数逻辑：只要大于1就继续减，停在1s保持直到任务结束 if (timeLeft > 1) { timeLeft--; } // 修改：每 1000ms (1秒) 刷新一次 hand