Question

我正在制作一个迷你绘图游戏应用程序，并且我制作了此类来保存绘图路径及其相应颜色，现在我需要保存它，以便我的应用程序的其他用户可以获取该数据并实际查看绘图 COLUMN|VALUE ============= C1|V1 C2|V2 但是当我执行class CustomPath(path: android.graphics.Path, paint: android.graphics.Paint)时，其中array是ArrayList时，我会收到此错误

“ E / MessageQueue-JNI：com.google.firebase.database.DatabaseException：不支持序列化集合，请改用列表”

有没有更好的方法可以将此ArrayList保存在游戏的其他玩家可以获取其持有的数据的位置，从而使平局显示在各自的屏幕上？

代码：

 myRefDraw?.push()?.setValue((array))

和

class CanvasView(context: Context, attrs:AttributeSet?): View(context,attrs) {
    private var mAuth: FirebaseAuth
    private var mFirebaseDatabase:FirebaseDatabase
    var paint: Paint = Paint()
    var path: Path = Path()
    var apagar: Boolean = false

    var array = arrayListOf<CustomPath>()
    private var database: FirebaseDatabase? = null
    private var myRefDraw: DatabaseReference? = null
    var c = CustomPath(path,paint)
    override fun onDraw(canvas: Canvas) {
        for (p in array) {
            canvas.drawPath(p.getPath(), p.getPaint())

        }
        super.onDraw(canvas)
    }
    fun clear(){
        array.clear()
        invalidate()
    }

    override fun onTouchEvent(event: MotionEvent): Boolean {
        when (event.action) {
            MotionEvent.ACTION_DOWN -> {
                path = Path()
                path.moveTo(event.x, event.y)
                c = CustomPath(path,paint)
                array.add(c)
                myRefDraw?.push()?.setValue((array))

            }
            MotionEvent.ACTION_MOVE -> {
                path.lineTo(event.x, event.y)
                invalidate()

            }
            MotionEvent.ACTION_UP -> {


            }
        }
        return true
    }

    init {
        paint.color = Color.BLACK
        paint.style = Paint.Style.STROKE
        paint.strokeWidth = 12f
        paint.strokeJoin = Paint.Join.ROUND;
        paint.strokeCap = Paint.Cap.ROUND;



        mAuth = FirebaseAuth.getInstance();
        mFirebaseDatabase = FirebaseDatabase.getInstance();
        myRefDraw = mFirebaseDatabase.getReference("pathDraw");
        

    }

}```

将自定义对象保存到Firebase

0 个答案: