Today I was going to write a clock, halfway through, and when I saw the scale, I suddenly realized that it could be written as a progress bar, so I changed it. It's super simple. The following is the code written:
class LoadingView : View {
private val mPaint = Paint()
var colors = arrayOf(
Color.rgb(0x00, 0xFF, 0x7F), Color.rgb(0x00, 0xFF, 0xCC), Color.rgb(0x00, 0xFF, 0xAA)
, Color.rgb(0x00, 0xF5, 0xFF), Color.rgb(0x00, 0xC5, 0xCD), Color.rgb(0x00, 0xB2, 0xEE)
)
var curColor = 0
constructor(context: Context) : this(context, null)
constructor(context: Context, attr: AttributeSet?) : this(context, attr, 0)
constructor(context: Context, attr: AttributeSet?, style: Int) : super(context, attr, style)
init {
mPaint.strokeWidth = 20f
mPaint.strokeCap = BUTT
mPaint.textSize = 50f
mPaint.style = Paint.Style.FILL_AND_STROKE
Thread {
kotlin.run {
while (true) {
if (curColor > 1) curColor -= 1
invalidate()
SystemClock.sleep(100)
}
}
}.start()
}
override fun onDraw(canvas: Canvas?) {
super.onDraw(canvas)
canvas?.translate(width / 2.toFloat(), height / 2.toFloat())
for (i in 0..359) {
if (i % 30 == 0) {
mPaint.color = colors[curColor % 6]
canvas?.drawLine(20.toFloat(), 50.toFloat(), 25.toFloat(), 50.toFloat(), mPaint)
curColor += 1
}
canvas?.rotate(1f)
}
}
}
Can refer to it, very clever.