Call to ‘Thread.sleep()‘ in a loop, probably busy-waiting Inspection info: 彻底解决

排除 IntelliJ IDEA 版本信息

IntelliJ IDEA 2022.1.3 (Community Edition)
Build #IC-221.5921.22, built on June 21, 2022
Runtime version: 11.0.15+10-b2043.56 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Windows 10 10.0
GC: G1 Young Generation, G1 Old Generation
Memory: 1012M
Cores: 8
Non-Bundled Plugins:
    com.intellij.zh (221.224)
Kotlin: 221-1.6.21-release-337-IJ5921.22

最新的版本，依旧会报错

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IDEA 告警信息提示

Call to 'Thread.sleep()' in a loop, probably busy-waiting 
 Inspection info: Reports calls to java.lang.Thread.sleep() that occur inside loops. Such calls are indicative of "busy-waiting". Busy-waiting is often inefficient, and may result in unexpected deadlocks as busy-waiting threads do not release locked resources.

中文翻译

解决办法：

• 1.Thread.sleep() 替换为Timer
• 2.ScheduledExecutorService方案实现线程时长频率

为什么这样做

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Thread.sleep()代码告警位置

告警位置特征：

• 1.循环中使用Thread.sleep()，传入参数（millis:300）很短
• 2.导致持续不断的sleep 不安全

• 尝试去掉循环效果

黄色代码报警标志已经消失。

使用Timer 替代Thread.sleep()

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android-timer

基于Handler的Android定时器与倒计时器

源码地址：Github AndroidTimer

特性

支持操作 :

1. start
2. pause
3. resume
4. cancel

使用

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}

dependencies {
    ...
    compile 'com.github.xesam:AndroidTimer:v0.1'
}

TODO

• add ticker sequence

使用

CountTimer

    new CountTimer(100) {

        @Override
        public void onTick(long millisFly) { // millisFly is the Elapsed time at *Running State*
            vCountSwitcher.setText((millisFly) + "");
            Log.d("onTick", millisFly + "");
        }
    };

CountDownTimer

    new CountDownTimer(10_000, 100) {

        @Override
        public void onTick(long millisUntilFinished) { // millisUntilFinished is the left time at *Running State*
            Log.d("onTick", millisFly + "");
        }

        @Override
        public void onCancel(long millisUntilFinished) {
        }

        @Override
        public void onPause(long millisUntilFinished) {
        }

        @Override
        public void onResume(long millisUntilFinished) {
        }

        @Override
        public void onFinish() {
        }
    };

截图

参考自 Android SDK 中的 CountDownTimer