平移地图时禁用滚动视图

Question

我是 android 编程的新手，甚至是 kotlin 的新手，但我正在尝试实现一个简单的 activity 作为概念证明，其中地图片段是可滚动列表的一部分稍后将用于捕获用户信息（以及地图上的标记位置）。

我使用 google 开发人员教程让我的地图片段显示地图，现在我将该地图片段嵌入到滚动视图中。一切正常，除了当我尝试垂直平移地图时 (north/south)，我的滚动视图开始滚动。

如果触摸地图片段区域，如何防止滚动视图移动？在此先感谢您的帮助！

这是 activity 的 XML 代码：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    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:orientation="vertical">

    <ScrollView

        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="true">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/colorAccent">

            <TextView
                android:id="@+id/textView2"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="24dp"
                android:text="TextView1"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

            <EditText
                android:id="@+id/editTextTextPersonName"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="60dp"
                android:ems="10"
                android:inputType="textPersonName"
                android:text="Name"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.497"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/textView2" />

            <TextView
                android:id="@+id/textView3"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="172dp"
                android:text="TextView"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.498"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/editTextTextPersonName" />

            <fragment
                android:id="@+id/map_fragment"
                class="com.google.android.gms.maps.SupportMapFragment"
                android:layout_width="match_parent"
                android:layout_height="300dp"
                android:layout_marginTop="28dp"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.0"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/textView3" />

            <TextView
                android:id="@+id/textView4"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginTop="200dp"
                android:layout_marginBottom="16dp"
                android:text="HELLO WORLD DOWN HERE"
                android:textSize="20sp"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="0.497"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/map_fragment" />


        </androidx.constraintlayout.widget.ConstraintLayout>
    </ScrollView>

</LinearLayout>

这是 koitlin activity MainActivity.kt:

// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.google.codelabs.buildyourfirstmap

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.GoogleMap
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.UiSettings
import com.google.android.gms.maps.model.LatLngBounds
import com.google.android.gms.maps.model.MarkerOptions
import com.google.codelabs.buildyourfirstmap.place.Place
import com.google.codelabs.buildyourfirstmap.place.PlacesReader

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val mapFragment = supportFragmentManager.findFragmentById(R.id.map_fragment) as? SupportMapFragment

        mapFragment?.getMapAsync {
                googleMap->addMarkers(googleMap)
        }

        mapFragment?.getMapAsync { googleMap ->
            // Ensure all places are visible in the map.
            googleMap.setOnMapLoadedCallback {
                val bounds = LatLngBounds.builder()
                places.forEach { bounds.include(it.latLng) }
                googleMap.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds.build(), 20))
                val uisettings = googleMap.uiSettings
                googleMap.uiSettings.isZoomControlsEnabled = true

            }

        }

    }

    private val places: List<Place> by lazy {
        PlacesReader(this).read()
    }

    /**
     * Adds marker representations of the places list on the provided GoogleMap object
     */
    private fun addMarkers(googleMap: GoogleMap) {
        places.forEach { place ->
            val marker = googleMap.addMarker(
                MarkerOptions()
                    .title(place.name)
                    .position(place.latLng)
            )

        }
    }
}

Answer 1

您应该在地图准备好后立即添加这些行：

googleMap.setOnCameraMoveStartedListener(OnCameraMoveStartedListener { i ->
    if (i == OnCameraMoveStartedListener.REASON_GESTURE) {
        blockScrollView()
    }
})

googleMap.setOnCameraMoveCanceledListener(OnCameraMoveCanceledListener { enableScrollView() })

在 blockScrollView()、enableScrollView() 方法中声明和禁用、启用它。

可选步骤： 在 class 级别声明 GoogleMap map; 并在 getMapAsync 方法中将 googleMap 初始化为它。并且每次使用 map 时都使用 map 而不是调用 getMapAsync。多次调用 getMapAsync 是错误的。

平移地图时禁用滚动视图

disable scrollview when panning map

android

google-maps

kotlin

supportmapfragment