【发布时间】：2021-01-27 17:43:14
【问题描述】：
我在 Kotlin 上使用通向活动的菜单编写应用程序，然后在活动内，您可以向右或向左滑动以“导航”到下一个活动（基于菜单）大多数活动是 LinearLayout 以显示 Imageview 但我有两个 Activity 在 ScrollView 中包含两个或三个 Imageview，我的问题是由于 ScrollView 我无法检测到滑动并且无法摆脱它。
我尝试了“requestDisallowInterceptTouchEvent(true)”方法，但没有任何反应。这是我的 LinearLayout 活动代码：
class Felicitaciones : AppCompatActivity(), GestureDetector.OnGestureListener {
lateinit var gestureDetector: GestureDetector
var x2:Float = 0.0f
var x1:Float = 0.0f
companion object{
const val MIN_DISTANCE = 150
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_felicitaciones)
gestureDetector = GestureDetector(this,this)
}
override fun onTouchEvent(event: MotionEvent?): Boolean {
gestureDetector.onTouchEvent(event)
when (event?.action){
//cuando empieza el swipe
0 ->
{
x1 = event.x
}
//cuando termina el swipe
1 ->
{
x2 = event.x
val valueX:Float = x2-x1
if(abs(valueX) > MIN_DISTANCE){
//detectar swipe hacia la derecha <=
if(x2 > x1){
val intent = Intent(this, Codigo::class.java)
startActivity(intent)
}
//detectar swipe hacia la izquierda =>
else{
val intent = Intent(this, Esterilizacion::class.java)
startActivity(intent)
}
}
}
}
return super.onTouchEvent(event)
}
override fun onDown(e: MotionEvent?): Boolean {
//TODO("Not yet implemented")
return false;
}
override fun onShowPress(e: MotionEvent?) {
//TODO("Not yet implemented")
}
override fun onSingleTapUp(e: MotionEvent?): Boolean {
//TODO("Not yet implemented")
return false
}
override fun onScroll(
e1: MotionEvent?,
e2: MotionEvent?,
distanceX: Float,
distanceY: Float
): Boolean {
//TODO("Not yet implemented")
return false
}
override fun onLongPress(e: MotionEvent?) {
//TODO("Not yet implemented")
}
override fun onFling(
e1: MotionEvent?,
e2: MotionEvent?,
velocityX: Float,
velocityY: Float
): Boolean {
//TODO("Not yet implemented")
return false
}
}
这是布局（上面的xml）
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#3AA9B0">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/vista_felicitaciones_img"
android:scaleType="fitXY">
</ImageView>
</androidx.constraintlayout.widget.ConstraintLayout>
这是有问题的班级：
class Codigo : AppCompatActivity(), GestureDetector.OnGestureListener {
lateinit var gestureDetector: GestureDetector
var x2:Float = 0.0f
var x1:Float = 0.0f
companion object{
const val MIN_DISTANCE = 150
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_codigo)
gestureDetector = GestureDetector(this, this)
val codigoScroll = findViewById<ScrollView>(R.id.codigo_scrollview)
codigoScroll.requestDisallowInterceptTouchEvent(true)
}
override fun onTouchEvent(event: MotionEvent?): Boolean {
when (event?.action){
//cuando empieza el swipe
0 -> {
x1 = event.x
}
//cuando termina el swipe
1 -> {
x2 = event.x
val valueX: Float = x2 - x1
if (abs(valueX) > MIN_DISTANCE) {
//detectar swipe hacia la derecha <=
if (x2 > x1) {
val intent = Intent(this, Comite::class.java)
startActivity(intent)
}
//detectar swipe hacia la izquierda =>
else {
val intent = Intent(this, Felicitaciones::class.java)
startActivity(intent)
}
}
}
}
return super.onTouchEvent(event)
}
override fun onDown(e: MotionEvent?): Boolean {
//TODO("Not yet implemented")
return false;
}
override fun onShowPress(e: MotionEvent?) {
//TODO("Not yet implemented")
}
override fun onSingleTapUp(e: MotionEvent?): Boolean {
//TODO("Not yet implemented")
return false
}
override fun onScroll(
e1: MotionEvent?,
e2: MotionEvent?,
distanceX: Float,
distanceY: Float
): Boolean {
//TODO("Not yet implemented")
return false
}
override fun onLongPress(e: MotionEvent?) {
//TODO("Not yet implemented")
}
override fun onFling(
e1: MotionEvent?,
e2: MotionEvent?,
velocityX: Float,
velocityY: Float
): Boolean {
//TODO("Not yet implemented")
return false
}
}
和布局：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#3AA9B0">
<ScrollView
android:id="@+id/codigo_scrollview"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="fitStart"
android:cropToPadding="false"
android:adjustViewBounds="true"
android:src="@drawable/vista_codigo_img">
</ImageView>
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="fitStart"
android:cropToPadding="false"
android:adjustViewBounds="true"
android:src="@drawable/vista_codigo_2_img">
</ImageView>
</LinearLayout>
</ScrollView>
</androidx.constraintlayout.widget.ConstraintLayout>
提前谢谢你
【问题讨论】：
标签： android kotlin scrollview touch swipe