OnTouch 给出不同的位置，与 ImageView 位置相比
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OnTouch giving different position, compared to ImageView position
我有许多以编程方式定义的 ImageView，它们在数组中都有自己的位置，就像这样：
const1Positions = arrayOf(
Point(dpToPx(349), dpToPx(258)),
Point(dpToPx(491), dpToPx(302)),
Point(dpToPx(495), dpToPx(429)),
Point(dpToPx(669), dpToPx(524)),
Point(dpToPx(600), dpToPx(618))
)
fun Activity.dpToPx(dp: Int): Int {
return TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dp.toFloat(),
resources.displayMetrics
).roundToInt()
}
view.setOnTouchListener { v, event ->
when (event.actionMasked) {
MotionEvent.ACTION_DOWN -> {
Log.d("DEBUG_TAG", event.x.toString())
true
}
MotionEvent.ACTION_UP -> {
Log.d("DEBUG_TAG","Action was UP")
Log.d("test", const1Positions[0].x.toString())
Log.d("test2", view.width.toString())
true
}
MotionEvent.ACTION_MOVE -> {
Log.d("DEBUG_TAG","Action was MOVE")
true
}
MotionEvent.ACTION_CANCEL -> {
Log.d("DEBUG_TAG","Action was CANCEL")
true
}
MotionEvent.ACTION_OUTSIDE -> {
Log.d(
"DEBUG_TAG",
"Movement occurred outside bounds of current screen element"
)
true
}
else -> super.onTouchEvent(event)
}
}
params.width = view.resources.displayMetrics.widthPixels * 2
params.height = view.resources.displayMetrics.heightPixels * 2
view.layoutParams = params
2020-03-25 19:31:07.796 26112-26112/com.example.android.bonte_android D/DEBUG_TAG: 395.63367
2020-03-25 19:31:07.833 26112-26112/com.example.android.bonte_android D/test: 890
2020-03-25 19:31:07.834 26112-26112/com.example.android.bonte_android D/test2: 2160这里是 dpToPx:
const1Positions = arrayOf(
Point(dpToPx(349), dpToPx(258)),
Point(dpToPx(491), dpToPx(302)),
Point(dpToPx(495), dpToPx(429)),
Point(dpToPx(669), dpToPx(524)),
Point(dpToPx(600), dpToPx(618))
)
fun Activity.dpToPx(dp: Int): Int {
return TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dp.toFloat(),
resources.displayMetrics
).roundToInt()
}
view.setOnTouchListener { v, event ->
when (event.actionMasked) {
MotionEvent.ACTION_DOWN -> {
Log.d("DEBUG_TAG", event.x.toString())
true
}
MotionEvent.ACTION_UP -> {
Log.d("DEBUG_TAG","Action was UP")
Log.d("test", const1Positions[0].x.toString())
Log.d("test2", view.width.toString())
true
}
MotionEvent.ACTION_MOVE -> {
Log.d("DEBUG_TAG","Action was MOVE")
true
}
MotionEvent.ACTION_CANCEL -> {
Log.d("DEBUG_TAG","Action was CANCEL")
true
}
MotionEvent.ACTION_OUTSIDE -> {
Log.d(
"DEBUG_TAG",
"Movement occurred outside bounds of current screen element"
)
true
}
else -> super.onTouchEvent(event)
}
}
params.width = view.resources.displayMetrics.widthPixels * 2
params.height = view.resources.displayMetrics.heightPixels * 2
view.layoutParams = params
2020-03-25 19:31:07.796 26112-26112/com.example.android.bonte_android D/DEBUG_TAG: 395.63367
2020-03-25 19:31:07.833 26112-26112/com.example.android.bonte_android D/test: 890
2020-03-25 19:31:07.834 26112-26112/com.example.android.bonte_android D/test2: 2160我试图 setOnTouchListener 到每个 ImageView (当我在 for 中初始化它们时，我也调用 imageview.setOnTouchListener...)
但我的触摸无法识别。
我也尝试过，而不是向每个 ImageView 添加 onTouchListener，而是在主视图中添加 onTouchEvent，如果 event.x == imageview.x(用户触摸了 ImageView)，则执行操作。但是 event.x 和 image.x 是不同的。
这是我的 setOnTouchListener:
const1Positions = arrayOf(
Point(dpToPx(349), dpToPx(258)),
Point(dpToPx(491), dpToPx(302)),
Point(dpToPx(495), dpToPx(429)),
Point(dpToPx(669), dpToPx(524)),
Point(dpToPx(600), dpToPx(618))
)
fun Activity.dpToPx(dp: Int): Int {
return TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dp.toFloat(),
resources.displayMetrics
).roundToInt()
}
view.setOnTouchListener { v, event ->
when (event.actionMasked) {
MotionEvent.ACTION_DOWN -> {
Log.d("DEBUG_TAG", event.x.toString())
true
}
MotionEvent.ACTION_UP -> {
Log.d("DEBUG_TAG","Action was UP")
Log.d("test", const1Positions[0].x.toString())
Log.d("test2", view.width.toString())
true
}
MotionEvent.ACTION_MOVE -> {
Log.d("DEBUG_TAG","Action was MOVE")
true
}
MotionEvent.ACTION_CANCEL -> {
Log.d("DEBUG_TAG","Action was CANCEL")
true
}
MotionEvent.ACTION_OUTSIDE -> {
Log.d(
"DEBUG_TAG",
"Movement occurred outside bounds of current screen element"
)
true
}
else -> super.onTouchEvent(event)
}
}
params.width = view.resources.displayMetrics.widthPixels * 2
params.height = view.resources.displayMetrics.heightPixels * 2
view.layoutParams = params
2020-03-25 19:31:07.796 26112-26112/com.example.android.bonte_android D/DEBUG_TAG: 395.63367
2020-03-25 19:31:07.833 26112-26112/com.example.android.bonte_android D/test: 890
2020-03-25 19:31:07.834 26112-26112/com.example.android.bonte_android D/test2: 2160我的布局宽度和高度都比屏幕大 2 倍，我可以放大/缩小和滚动，但我没有使用 ScrollView。我正在使用 GitHub 上提供的自定义布局。
const1Positions = arrayOf(
Point(dpToPx(349), dpToPx(258)),
Point(dpToPx(491), dpToPx(302)),
Point(dpToPx(495), dpToPx(429)),
Point(dpToPx(669), dpToPx(524)),
Point(dpToPx(600), dpToPx(618))
)
fun Activity.dpToPx(dp: Int): Int {
return TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dp.toFloat(),
resources.displayMetrics
).roundToInt()
}
view.setOnTouchListener { v, event ->
when (event.actionMasked) {
MotionEvent.ACTION_DOWN -> {
Log.d("DEBUG_TAG", event.x.toString())
true
}
MotionEvent.ACTION_UP -> {
Log.d("DEBUG_TAG","Action was UP")
Log.d("test", const1Positions[0].x.toString())
Log.d("test2", view.width.toString())
true
}
MotionEvent.ACTION_MOVE -> {
Log.d("DEBUG_TAG","Action was MOVE")
true
}
MotionEvent.ACTION_CANCEL -> {
Log.d("DEBUG_TAG","Action was CANCEL")
true
}
MotionEvent.ACTION_OUTSIDE -> {
Log.d(
"DEBUG_TAG",
"Movement occurred outside bounds of current screen element"
)
true
}
else -> super.onTouchEvent(event)
}
}
params.width = view.resources.displayMetrics.widthPixels * 2
params.height = view.resources.displayMetrics.heightPixels * 2
view.layoutParams = params
2020-03-25 19:31:07.796 26112-26112/com.example.android.bonte_android D/DEBUG_TAG: 395.63367
2020-03-25 19:31:07.833 26112-26112/com.example.android.bonte_android D/test: 890
2020-03-25 19:31:07.834 26112-26112/com.example.android.bonte_android D/test2: 2160我使用 Log 来比较触摸位置、ImageView 位置和布局大小。但结果完全不同：
const1Positions = arrayOf(
Point(dpToPx(349), dpToPx(258)),
Point(dpToPx(491), dpToPx(302)),
Point(dpToPx(495), dpToPx(429)),
Point(dpToPx(669), dpToPx(524)),
Point(dpToPx(600), dpToPx(618))
)
fun Activity.dpToPx(dp: Int): Int {
return TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dp.toFloat(),
resources.displayMetrics
).roundToInt()
}
view.setOnTouchListener { v, event ->
when (event.actionMasked) {
MotionEvent.ACTION_DOWN -> {
Log.d("DEBUG_TAG", event.x.toString())
true
}
MotionEvent.ACTION_UP -> {
Log.d("DEBUG_TAG","Action was UP")
Log.d("test", const1Positions[0].x.toString())
Log.d("test2", view.width.toString())
true
}
MotionEvent.ACTION_MOVE -> {
Log.d("DEBUG_TAG","Action was MOVE")
true
}
MotionEvent.ACTION_CANCEL -> {
Log.d("DEBUG_TAG","Action was CANCEL")
true
}
MotionEvent.ACTION_OUTSIDE -> {
Log.d(
"DEBUG_TAG",
"Movement occurred outside bounds of current screen element"
)
true
}
else -> super.onTouchEvent(event)
}
}
params.width = view.resources.displayMetrics.widthPixels * 2
params.height = view.resources.displayMetrics.heightPixels * 2
view.layoutParams = params
2020-03-25 19:31:07.796 26112-26112/com.example.android.bonte_android D/DEBUG_TAG: 395.63367
2020-03-25 19:31:07.833 26112-26112/com.example.android.bonte_android D/test: 890
2020-03-25 19:31:07.834 26112-26112/com.example.android.bonte_android D/test2: 2160屏幕位置是基于2160的，所以显示的是890。但是即使我触摸屏幕，event.x位置显示的是395而不是890，event.x接收到的最大位置是1080(实际手机宽度)，而不是 2160(布局最大宽度)。有谁知道为什么会这样？
而不是将onTouchListener添加到View，最好添加到所有ImageView，但是当我这样做时，正如我所说，onTouchListener无法识别任何触摸，
我希望这个答案(由 Piyush 提供)会让你满意：
MotionEvent will sometimes return absolute X and Y coordinates relative to the view, and sometimes relative coordinates to the previous motion event.
getRawX() and getRawY() that is guaranteed to return absolute coordinates, relative to the device screen.
While getX() and getY(), should return you coordinates, relative to the View, that dispatched them.
UPD：添加到 XML 属性 app:hasClickableChildren="true" 中的 ZoomLayout 修复问题。