将使用字节的Java函数转换为Kotlin [英] Convert java function which uses bytes to Kotlin

问题描述

我将用Java编写的函数转换为Kotlin特有的问题。

I have a problem with converting function written in java to Kotlin specific.

这里是用Java编写的：

Here is written in Java:

 private boolean isOldOemCommissioningFormat(byte[] assetData) {
    if (assetData == null
            || assetData.length < mAssetDataDelimeterByteCount + mAssetDataOwnerIdByteCount + mAssetDataIdLeadingZerosByteCount + mAssetDataIdByteCount)
        return false;

    int oemMarkerIndex = mAssetDataDelimeterByteCount + mAssetDataIdLeadingZerosByteCount + mAssetDataIdByteCount;
    if (assetData[oemMarkerIndex] ==  PARTIAL_OEM_MARKER || assetData[oemMarkerIndex] == FULL_OEM_MARKER)
        return ((assetData[oemMarkerIndex + 1] >> 6) & 0x01) == 0;

    return false;

}

但是，当我使用Android Studio IDE转换为Kotlin时转换器它给我的信息是：

However, when i am converting to Kotlin using Android Studio IDE converter it gives me this:

 private fun isOldOemCommissioningFormat(assetData: ByteArray?): Boolean {
    if (assetData == null || assetData.size < mAssetDataDelimeterByteCount + mAssetDataOwnerIdByteCount + mAssetDataIdLeadingZerosByteCount + mAssetDataIdByteCount)
        return false

    val oemMarkerIndex = mAssetDataDelimeterByteCount + mAssetDataIdLeadingZerosByteCount + mAssetDataIdByteCount
    return if (assetData[oemMarkerIndex] == PARTIAL_OEM_MARKER || assetData[oemMarkerIndex] == FULL_OEM_MARKER) assetData[oemMarkerIndex + 1] shr 6 and 0x01 == 0 else false

}

我猜它给出了错误的转换，加上'shr'在红色处标记为未解决的引用。

It gives wrong convertion i guess, plus the 'shr' is marked on red as unresolved reference.

如何正确转换？

其他变量是：

   public static final byte PARTIAL_OEM_MARKER = '#';
public static final byte FULL_OEM_MARKER = '&';
public static final int OEM_COMMISSIONING_CUSTOMER_ID_ENCODING_CHARACTERS_COUNT = 40;
public static final int OEM_COMMISSIONING_CUSTOMER_ID_ENCODING_FIRST_CHARACTER_INDEX = 64;

和

 private final int mAssetDataIdLeadingZerosByteCount;
private final int mAssetDataIdByteCount;
private final int mAssetDataDelimeterByteCount;
private final int mAssetDataOwnerIdByteCount;

推荐答案

在Kotlin中， shr仅适用于Int和Long ，请尝试转换您的值

In Kotlin "shr" available only for Int and Long, try to convert your value

assetData[oemMarkerIndex + 1].toInt()

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