我正在使用HereMaps在 ViewPager2中的子片段中显示地图。但是当地图被初始化时，应用程序会暂时冻结，直到地图被初始化或失败。地图初始化完成后，我就可以触摸 UI。
我有一个Activity, 构建页面适配器。第一个片段有一个用于地图视图的子片段。
我究竟做错了什么？即使地图未完成初始化，我也希望能够向下滚动当前片段或导航离开该片段或活动。
活动布局
<androidx.coordinatorlayout.widget.CoordinatorLayout 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">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<TextView
android:id="@+id/call_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:minHeight="?actionBarSize"
android:padding="@dimen/appbar_padding"
android:text="@string/app_name"
android:textAppearance="@style/TextAppearance.Widget.AppCompat.Toolbar.Title" />
<com.google.android.material.tabs.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorAccent" />
</com.google.android.material.appbar.AppBarLayout>
<androidx.viewpager2.widget.ViewPager2
android:id="@+id/sectionViewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
加载的视图寻呼机的第一个片段
<ScrollView 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="wrap_content"
android:padding="@dimen/frame_padding">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<include /// blah other fragments />
<FrameLayout
android:id="@+id/mapFragmentContainer"
android:layout_width="0dp"
android:layout_height="@dimen/widget_map_size_height"
android:layout_marginTop="@dimen/section_margin_vertical_20"
android:background="@drawable/background_rounded_corners"
android:elevation="1dp"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/some_other_section_id" />
<include /// blah other fragments />
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
嵌入在第一个片段中的地图片段。
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
android:id="@+id/mapFragment"
class="com.here.android.mpa.mapping.AndroidXMapFragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:tag="heremaps"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ProgressBar
android:id="@+id/progressBarMaps"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
第一个片段类
class MyFirstFragment : Fragment(R.layout.my_first_fragment) {
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
activity?.let {
// Add map preview
childFragmentManager.beginTransaction().replace(R.id.mapFragmentContainer, MapViewFragment()).commit()
}
}
}
MapViewFragment类_
class MapViewFragment : Fragment(R.layout.component_mapview) {
private val TAG = "MapViewFragment"
private var m_map: Map? = null
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
initMapFragmentView()
}
private fun initMapFragmentView() {
val success = com.here.android.mpa.common.MapSettings.setIsolatedDiskCacheRootPath(requireContext().applicationContext.filesDir.absolutePath + "/.isolated-here-maps")
if (!success) {
Log.e(TAG, "FAILURE DISK CACHE")
return
}
val mapFragment = childFragmentManager.findFragmentById(R.id.mapFragment) as AndroidXMapFragment?
val context = ApplicationContext(requireContext()).apply {
setAppIdCode(requireContext().getString(R.string.heremaps_appid), requireContext().getString(R.string.heremaps_appcode))
setLicenseKey(requireContext().getString(R.string.heremaps_licensekey))
}
Log.i(TAG, "Starting to build map frag")
mapFragment?.let { fragment ->
fragment.init(context) { error ->
when (error) {
OnEngineInitListener.Error.NONE -> {
progressBarMaps?.visibility = View.GONE
m_map = fragment.map
m_map?.run {
setCenter(GeoCoordinate(52.500556, 13.398889, 0.0), Map.Animation.NONE)
setZoomLevel((maxZoomLevel + minZoomLevel) / 2);
}
Toast.makeText(requireContext(), "Map Engine initialized successfully!", Toast.LENGTH_LONG).show();
}
else -> {
val errorMessage = "Error: ${error}, SDK Version: ${Version.getSdkVersion()}"
Log.i(TAG, "ERROR: $errorMessage")
progressBarMaps?.visibility = View.GONE
Toast.makeText(requireContext(), errorMessage, Toast.LENGTH_LONG).show();
}
}
}
}
}
}