Question

我从Java到kotlin都没有看这个表盘示例，但是突然发现我无法访问三个函数。（我只提到一个，因为错误是相同的“未解决的引用”）

我不明白为什么我不能访问它们，我已经更改了访问修饰符，将一个类扩展到另一个类，但是我无法访问那些功能

感谢您的宝贵意见

ComplicationConfigActivity类：WearableActivity（），View.OnClickListener {

private val TAG = "Configuration Activity"

internal val COMPLICATION_CONFIG_REQUEST_CODE = 1001 // internal val COMPLICATION_CONFIG_REQUEST_CODE = 1001


enum class ComplicationLocation {
    LEFT,
    RIGHT,
    TOP,
    BOTTOM
}//---

private var mLeftComplicationId: Int = 0
private var mRightComplicationId: Int = 0
//---
private var mTopComplicationId: Int = 0
private var mBottomComplicationId: Int = 0
//---



override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_complication_config)

    setContentView(R.layout.activity_complication_config)
    mDefaultAddComplicationDrawable = getDrawable(R.drawable.add_complication)

    mSelectedComplicationId = -1

    mLeftComplicationId = MyWatchFace.getComplicationId(ComplicationLocation.LEFT) // unresolved reference
    mRightComplicationId = MyWatchFace.getComplicationId(ComplicationLocation.RIGHT) // getComplicationId
    mTopComplicationId = MyWatchFace.getComplicationId(ComplicationLocation.TOP)
    mBottomComplicationId = MyWatchFace.getComplicationId(ComplicationLocation.BOTTOM)

MyWatchFace类：CanvasWatchFaceService（）{

private val TAG = "ComplicationConfigActivity"
// TODO: Step 2, intro 1
private val LEFT_COMPLICATION_ID = 0
private val RIGHT_COMPLICATION_ID = 1
private val TOP_COMPLICATION_ID = 2
private val BOTTOM_COMPLICATION_ID = 3

private val COMPLICATION_IDS =
    intArrayOf(LEFT_COMPLICATION_ID, RIGHT_COMPLICATION_ID, TOP_COMPLICATION_ID, BOTTOM_COMPLICATION_ID)

// Left and right dial supported types.
private val COMPLICATION_SUPPORTED_TYPES = arrayOf(
    intArrayOf(
        ComplicationData.TYPE_RANGED_VALUE, ComplicationData.TYPE_ICON, ComplicationData.TYPE_SHORT_TEXT,
        //ComplicationData.IMAGE_STYLE_PHOTO,//
        ComplicationData.TYPE_SMALL_IMAGE
    ), intArrayOf(
        ComplicationData.TYPE_RANGED_VALUE, ComplicationData.TYPE_ICON, ComplicationData.TYPE_SHORT_TEXT,
        //ComplicationData.IMAGE_STYLE_PHOTO,//
        ComplicationData.TYPE_SMALL_IMAGE
    ), intArrayOf(
        ComplicationData.TYPE_RANGED_VALUE, ComplicationData.TYPE_ICON, ComplicationData.TYPE_SHORT_TEXT,
        //ComplicationData.IMAGE_STYLE_PHOTO,//
        ComplicationData.TYPE_SMALL_IMAGE
    ), intArrayOf(
        ComplicationData.TYPE_RANGED_VALUE, ComplicationData.TYPE_ICON, ComplicationData.TYPE_SHORT_TEXT,
        //ComplicationData.IMAGE_STYLE_PHOTO, //
        ComplicationData.TYPE_SMALL_IMAGE
    )
)

// Used by {@link ComplicationConfigActivity} to retrieve id for complication locations and
// to check if complication location is supported.
// TODO: Step 3, expose complication information, part 1
//---
internal fun getComplicationId( // CAN´T ACCESS THIS FUNCTION
    complicationLocation: ComplicationLocation
): Int {
    when (complicationLocation) {
        LEFT -> return LEFT_COMPLICATION_ID
        RIGHT -> return RIGHT_COMPLICATION_ID
        TOP -> return TOP_COMPLICATION_ID
        BOTTOM -> return BOTTOM_COMPLICATION_ID
        else -> return -1
    }
}
//----
// Used by {@link ComplicationConfigActivity} to retrieve all complication ids.
// TODO: Step 3, expose complication information, part 2
//---
internal fun getComplicationIds(): IntArray { // CAN´T ACCESS THIS FUNCTION

    return COMPLICATION_IDS
}
//---

// Used by {@link ComplicationConfigActivity} to retrieve complication types supported by
// location.
// TODO: Step 3, expose complication information, part 3
//---
internal fun getSupportedComplicationTypes( // CAN´T ACCESS THIS FUNCTION
    complicationLocation: ComplicationLocation
): IntArray {
    when (complicationLocation) {
        LEFT -> return COMPLICATION_SUPPORTED_TYPES[0]
        RIGHT -> return COMPLICATION_SUPPORTED_TYPES[1]
        TOP -> return COMPLICATION_SUPPORTED_TYPES[2]
        BOTTOM -> return COMPLICATION_SUPPORTED_TYPES[3]
        else -> return intArrayOf()
    }
}
//---

/*
 * Update rate in milliseconds for interactive mode. We update once a second to advance the
 * second hand.
 */
private val INTERACTIVE_UPDATE_RATE_MS = TimeUnit.SECONDS.toMillis(1)


override fun onCreateEngine(): Engine {
    return Engine()
}

private class EngineHandler(reference: Engine) : Handler() { // 
    private val mWeakReference: WeakReference<Engine> = WeakReference(reference)

    override fun handleMessage(msg: Message) {
        val engine = mWeakReference.get()
        if (engine != null) {
            when (msg.what) {
                MSG_UPDATE_TIME -> engine.handleUpdateTimeMessage()
            }
        }
    }
}

inner class Engine : CanvasWatchFaceService.Engine() {}

Answer 1

您像 static 方法那样调用getComplicationId，但是它是 Instance 方法。
要解决此问题，请将该方法（及其使用的变量）放在Companion Object中：

class MyWatchFace : CanvasWatchFaceService() {
    companion object{
        private val LEFT_COMPLICATION_ID = 0
        private val RIGHT_COMPLICATION_ID = 1
        private val TOP_COMPLICATION_ID = 2
        private val BOTTOM_COMPLICATION_ID = 3

        internal fun getComplicationId(complicationLocation: ComplicationLocation): Int {
            when (complicationLocation) {
                ComplicationLocation.LEFT -> return LEFT_COMPLICATION_ID
                ComplicationLocation.RIGHT -> return RIGHT_COMPLICATION_ID
                ComplicationLocation.TOP -> return TOP_COMPLICATION_ID
                ComplicationLocation.BOTTOM -> return BOTTOM_COMPLICATION_ID
                else -> return -1
            }
        }
    }
}

为什么我无法使用此功能？

1 个答案: