我找不到有关如何拦截新版Google Maps API v2地图触摸的示例。
我需要知道用户何时触摸地图,以便停止一个线程(将地图居中显示在我的当前位置周围)。
我找不到有关如何拦截新版Google Maps API v2地图触摸的示例。
我需要知道用户何时触摸地图,以便停止一个线程(将地图居中显示在我的当前位置周围)。
@ape在这里写了如何拦截地图点击的答案,但我需要拦截触摸事件,他建议查看其回答评论中的以下链接:如何处理Google Map API v2中地图的onTouch事件?。那个解决方案似乎是一个可行的解决方法,但建议的代码不完整。因此,我重新编写并测试了它,并且现在它可以工作了。这就是工作代码:
我创建了MySupportMapFragment.java类。
import com.google.android.gms.maps.SupportMapFragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
public class MySupportMapFragment extends SupportMapFragment {
public View mOriginalContentView;
public TouchableWrapper mTouchView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
mOriginalContentView = super.onCreateView(inflater, parent, savedInstanceState);
mTouchView = new TouchableWrapper(getActivity());
mTouchView.addView(mOriginalContentView);
return mTouchView;
}
@Override
public View getView() {
return mOriginalContentView;
}
}
我甚至创建了TouchableWrapper.java类:
import android.content.Context;
import android.view.MotionEvent;
import android.widget.FrameLayout;
public class TouchableWrapper extends FrameLayout {
public TouchableWrapper(Context context) {
super(context);
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
MainActivity.mMapIsTouched = true;
break;
case MotionEvent.ACTION_UP:
MainActivity.mMapIsTouched = false;
break;
}
return super.dispatchTouchEvent(event);
}
}
在布局中,我是这样声明的:
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/mapFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_below="@+id/buttonBar"
class="com.myFactory.myApp.MySupportMapFragment"
/>
只是为了在主活动中进行测试,我仅写了以下内容:
public class MainActivity extends FragmentActivity {
public static boolean mMapIsTouched = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
这里有一个简单的解决方案,可以根据用户选择(在地图上点击选项)来获取位置:
googleMap.setOnMapClickListener(new OnMapClickListener() {
@Override
public void onMapClick(LatLng arg0) {
// TODO Auto-generated method stub
Log.d("arg0", arg0.latitude + "-" + arg0.longitude);
}
});
现在支持许多新功能 :)
这是开发者笔记(Issue 4636):
2016年8月发布引入了一组新的相机变化监听器,用于相机运动开始、进行中和结束事件。您还可以看到相机移动的原因,无论是由用户手势、内置API动画还是开发人员控制的移动引起的。有关详细信息,请参阅相机更改事件指南: https://developers.google.com/maps/documentation/android-api/events#camera-change-events
此外,请查看发行说明: https://developers.google.com/maps/documentation/android-api/releases#august_1_2016
以下是文档页面中的代码片段
public class MyCameraActivity extends FragmentActivity implements
OnCameraMoveStartedListener,
OnCameraMoveListener,
OnCameraMoveCanceledListener,
OnCameraIdleListener,
OnMapReadyCallback {
private GoogleMap mMap;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_camera);
SupportMapFragment mapFragment =
(SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
}
@Override
public void onMapReady(GoogleMap map) {
mMap = map;
mMap.setOnCameraIdleListener(this);
mMap.setOnCameraMoveStartedListener(this);
mMap.setOnCameraMoveListener(this);
mMap.setOnCameraMoveCanceledListener(this);
// Show Sydney on the map.
mMap.moveCamera(CameraUpdateFactory
.newLatLngZoom(new LatLng(-33.87365, 151.20689), 10));
}
@Override
public void onCameraMoveStarted(int reason) {
if (reason == OnCameraMoveStartedListener.REASON_GESTURE) {
Toast.makeText(this, "The user gestured on the map.",
Toast.LENGTH_SHORT).show();
} else if (reason == OnCameraMoveStartedListener
.REASON_API_ANIMATION) {
Toast.makeText(this, "The user tapped something on the map.",
Toast.LENGTH_SHORT).show();
} else if (reason == OnCameraMoveStartedListener
.REASON_DEVELOPER_ANIMATION) {
Toast.makeText(this, "The app moved the camera.",
Toast.LENGTH_SHORT).show();
}
}
@Override
public void onCameraMove() {
Toast.makeText(this, "The camera is moving.",
Toast.LENGTH_SHORT).show();
}
@Override
public void onCameraMoveCanceled() {
Toast.makeText(this, "Camera movement canceled.",
Toast.LENGTH_SHORT).show();
}
@Override
public void onCameraIdle() {
Toast.makeText(this, "The camera has stopped moving.",
Toast.LENGTH_SHORT).show();
}
}
我在布局中创建了一个空的FrameLayout,覆盖在MapFragment之上。然后在这个视图上设置了一个onTouchListener,以便知道何时触摸地图,但返回false,以便将触摸传递给地图。
<FrameLayout
android:id="@+id/map_touch_layer"
android:layout_width="match_parent"
android:layout_height="match_parent" />
mapTouchLayer.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
Utils.logDebug(TAG, "Map touched!");
timeLastTouched = System.currentTimeMillis();
return false; // Pass on the touch to the map or shadow layer.
}
});
ACTION_DOWN
上返回false将导致ACTION_UP
被中断,并且onTouch
不会被调用。 - Hamzeh SobohGaucho提供了很好的答案,看到许多人点赞,我想可能需要另一个实现:
我需要使用一个监听器,以便在触摸时做出反应,而不必不断地检查它。
我把所有东西都放在一个类中,可以像这样使用:
mapFragment.setNonConsumingTouchListener(new TouchSupportMapFragment.NonConsumingTouchListener() {
@Override
public void onTouch(MotionEvent motionEvent) {
switch (motionEvent.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
// map is touched
break;
case MotionEvent.ACTION_UP:
// map touch ended
break;
default:
break;
// use more cases if needed, for example MotionEvent.ACTION_MOVE
}
}
});
地图片段需要是TouchSupportMapFragment类型,并且在布局xml中需要添加此行:
<fragment class="de.bjornson.maps.TouchSupportMapFragment"
...
以下是类的示例:
package de.bjornson.maps;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import com.google.android.gms.maps.SupportMapFragment;
public class TouchSupportMapFragment extends SupportMapFragment {
public View mOriginalContentView;
public TouchableWrapper mTouchView;
private NonConsumingTouchListener mListener;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
mOriginalContentView = super.onCreateView(inflater, parent, savedInstanceState);
mTouchView = new TouchableWrapper(getActivity());
mTouchView.addView(mOriginalContentView);
return mTouchView;
}
@Override
public View getView() {
return mOriginalContentView;
}
public void setNonConsumingTouchListener(NonConsumingTouchListener listener) {
mListener = listener;
}
public interface NonConsumingTouchListener {
boolean onTouch(MotionEvent motionEvent);
}
public class TouchableWrapper extends FrameLayout {
public TouchableWrapper(Context context) {
super(context);
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
if (mListener != null) {
mListener.onTouch(event);
}
return super.dispatchTouchEvent(event);
}
}
}
请查看此链接。实现该接口并填写onMapClick()
方法或您所需的任何方法,并将onMapClickListener
设置为正确的实现。
public class YourActivity extends Activity implements OnMapClickListener {
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
...
my_map.setOnMapClickListener(this)
...
}
public void onMapClick (LatLng point) {
// Do Something
}
}
class TouchableWrapper : FrameLayout {
constructor(context: Context) : this(context, null)
constructor(context: Context, attrs: AttributeSet?) : this(context, attrs, 0)
constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(context, attrs, defStyleAttr)
var onTouch: ((event :MotionEvent) -> Unit)? = null
override fun dispatchTouchEvent(event: MotionEvent): Boolean {
onTouch?.invoke(event)
return super.dispatchTouchEvent(event)
}
}
然后在你的布局文件中:
<com.yourpackage.views.TouchableWrapper
android:id="@+id/viewMapWrapper"
android:layout_height="match_parent"
android:layout_width="match_parent">
<fragment
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/map"
tools:context=".MapsActivity"
android:name="com.google.android.gms.maps.SupportMapFragment"/>
</com.yourpackage.views.TouchableWrapper>
然后像这样设置你的回调函数:
findViewById<TouchableWrapper>(R.id.viewMapWrapper)
.onTouch = {
if (MotionEvent.ACTION_DOWN == it.action) {
//Handle touch down on the map
}
}
// Initializing
markerPoints = new ArrayList<LatLng>();
// Getting reference to SupportMapFragment of the activity_main
SupportMapFragment sfm = (SupportMapFragment)getSupportFragmentManager().findFragmentById(R.id.map);
// Getting Map for the SupportMapFragment
map = sfm.getMap();
// Enable MyLocation Button in the Map
map.setMyLocationEnabled(true);
// Setting onclick event listener for the map
map.setOnMapClickListener(new OnMapClickListener() {
@Override
public void onMapClick(LatLng point) {
// Already two locations
if(markerPoints.size()>1){
markerPoints.clear();
map.clear();
}
// Adding new item to the ArrayList
markerPoints.add(point);
// Creating MarkerOptions
MarkerOptions options = new MarkerOptions();
// Setting the position of the marker
options.position(point);
if(markerPoints.size()==1){
options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_GREEN));
}else if(markerPoints.size()==2){
options.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED));
}
// Add new marker to the Google Map Android API V2
map.addMarker(options);
// Checks, whether start and end locations are captured
if(markerPoints.size() >= 2){
LatLng origin = markerPoints.get(0);
LatLng dest = markerPoints.get(1);
//Do what ever you want with origin and dest
}
}
});
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Util;
using Android.Views;
using Android.Widget;
using Android.Gms.Maps;
namespace apcurium.MK.Booking.Mobile.Client.Controls
{
public class TouchableMap : SupportMapFragment
{
public View mOriginalContentView;
public TouchableWrapper Surface;
public override View OnCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState)
{
mOriginalContentView = base.OnCreateView(inflater, parent, savedInstanceState);
Surface = new TouchableWrapper(Activity);
Surface.AddView(mOriginalContentView);
return Surface;
}
public override View View
{
get
{
return mOriginalContentView;
}
}
}
public class TouchableWrapper: FrameLayout {
public event EventHandler<MotionEvent> Touched;
public TouchableWrapper(Context context) :
base(context)
{
}
public TouchableWrapper(Context context, IAttributeSet attrs) :
base(context, attrs)
{
}
public TouchableWrapper(Context context, IAttributeSet attrs, int defStyle) :
base(context, attrs, defStyle)
{
}
public override bool DispatchTouchEvent(MotionEvent e)
{
if (this.Touched != null)
{
this.Touched(this, e);
}
return base.DispatchTouchEvent(e);
}
}
}
TouchableWrapper
不同,并且适用于最新版本的 play-services-maps:10.0.1
。此解决方案仅使用地图事件,而不使用自定义视图。不使用已弃用的函数,可能支持多个版本。GoogleMap googleMap;
boolean movedByApi = false;
您的片段或活动必须实现GoogleMap.OnMapReadyCallback
、GoogleMap.CancelableCallback
public class ActivityMap extends Activity implements OnMapReadyCallback, GoogleMap.CancelableCallback{
...
}
onMapReady
, onFinish
, onCancel
。在 onMapReady
中,googleMap对象必须为相机移动设置事件监听器。@Override
public void onMapReady(GoogleMap mMap) {
//instantiate the map
googleMap = mMap;
[...] // <- set up your map
googleMap.setOnCameraMoveListener(new GoogleMap.OnCameraMoveListener() {
@Override
public void onCameraMove() {
if (movedByApi) {
Toast.makeText(ActivityMap.this, "Moved by animation", Toast.LENGTH_SHORT).show();
[...] // <-- do something whe you want to handle api camera movement
} else {
Toast.makeText(ActivityMap.this, "Moved by user", Toast.LENGTH_SHORT).show();
[...] // <-- do something whe you want to handle user camera movement
}
}
});
}
@Override
public void onFinish() {
//is called when the animation is finished
movedByApi = false;
}
@Override
public void onCancel() {
//is called when the animation is canceled (the user drags the map or the api changes to a ne position)
movedByApi = false;
}
最后,最好创建一个通用函数来移动地图。
public void moveMapPosition(CameraUpdate cu, boolean animated){
//activate the flag notifying that the map is being moved by the api
movedByApi = true;
//if its not animated, just do instant move
if (!animated) {
googleMap.moveCamera(cu);
//after the instant move, clear the flag
movedByApi = false;
}
else
//if its animated, animate the camera
googleMap.animateCamera(cu, this);
}
或者说,每次移动地图时,在动画之前激活标志
movedByApi = true;
googleMap.animateCamera(cu, this);
我希望这可以帮到你!