[英]onClickListener not working, when overriding onTouchEvent in custom View
我想在单击按钮时开始绘制线条,而在将鼠标悬停在另一个按钮上时结束绘制线条。 我已经重写了onTouchEvent来画这条线,但是问题是现在onTouchListener甚至没有触发。 将newView移到背景使其可以工作,但是我希望绘制的线在前景上。 我认为问题在于,当我从代码中添加视图时,newView的onTouchEvent相对于另一个ViewGroup中的Button具有某种优先级。 组件Tree ,newView被添加到frameLayout1中
class MainActivity : AppCompatActivity() {
private val paint = Paint()
private val array1 = FloatArray(2)
private val array2 = FloatArray(2)
private var buttonwidth = 0;
private var buttonheight=0;
private var buttonIsTouched=false
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main);
button1.setOnTouchListener { _, event ->
if (event.action == MotionEvent.ACTION_DOWN) {
buttonIsTouched=true
Toast.makeText(this,"ora",Toast.LENGTH_SHORT).show()
}
if (event.action == MotionEvent.ACTION_UP) {
buttonIsTouched=false
Toast.makeText(this,"muda",Toast.LENGTH_SHORT).show()
}
false
}
}
override fun onResume() {
super.onResume()
buttonwidth = button1.width;
buttonheight = button1.height;
array1[0]=button1.x
array1[1]=button1.y
array2[0]=button2.x
array2[1]=button2.y
val newView = MyView(this)
newView.bringToFront()
newView.layoutParams= FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,FrameLayout.LayoutParams.MATCH_PARENT)
frameLayout1.addView(newView)
Toast.makeText(this,array1[0].toString()+" "+array1[1].toString(),Toast.LENGTH_SHORT).show()
}
internal inner class MyView(context: Context)// TODO Auto-generated constructor stub
: View(context) {
private var startX: Int = 0
private var startY: Int = 0
private var endX: Int = 0
private var endY: Int = 0
override fun onDraw(canvas: Canvas) {
super.onDraw(canvas)
paint.strokeWidth=21f
paint.color = Color.parseColor("#CD5C5C")
//canvas.drawLine(array1[0]+20f+buttonwidth/2,array1[1]+20f+buttonheight/2,array2[0]+20f+buttonwidth/2,array2[1]+20f+buttonheight/2,paint)
canvas.drawLine(startX.toFloat(),startY.toFloat(),endX.toFloat(),endY.toFloat(),paint)
}
override fun onTouchEvent(event: MotionEvent): Boolean {
super.onTouchEvent(event)
when (event.action) {
MotionEvent.ACTION_DOWN -> {
startX = event.x.toInt()
startY = event.y.toInt()
endX = event.x.toInt()
endY = event.y.toInt()
invalidate()
}
MotionEvent.ACTION_MOVE -> {
endX = event.x.toInt()
endY = event.y.toInt()
invalidate()
}
MotionEvent.ACTION_UP -> {
endX = event.x.toInt()
endY = event.y.toInt()
invalidate()
}
}
return true
}
}
}
您尚未引用该按钮
setContentView(R.layout.activity_main)
喜欢
button1 = findViewById(R.id.btn1)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.