android-studio - IntelliJ IDEA : Boolean method XX is always inverted

Question

我在 IntelliJ 中运行 lint 时收到警告“ bool 方法总是被反转”。我的代码库中有几个类似的警告。我错过了哪种基本编码风格？

public static boolean isBlueToothEnabled(){
    final BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    if(bluetoothAdapter != null)
        return bluetoothAdapter.isEnabled();
    return  false;
}

Answer 1

尝试返回 false如果 bluetoothAdapter为空，否则返回 isEnabled() 的输出

public static boolean isBlueToothEnabled(){
    final BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
    if(bluetoothAdapter == null){
        return false;
    }
    return bluetoothAdapter.isEnabled();
}

阅读更多:

In Clean Code, Robert Martin writes, “Negatives are just a bit harder to understand than positives. So, when possible, conditionals should be expressed as positives.” (Martin, [G29]). IntelliJ IDEA has three inspections to help you stay positive.

https://blog.jetbrains.com/idea/2014/09/the-inspection-connection-issue-2/
(条目 #4 避免否定条件)

https://www.jetbrains.com/help/idea/2016.1/invert-boolean.html