Question

我无法找到有关如何拦截新版Google Maps API v2上的地图触控的示例。

我需要知道用户何时触摸地图以停止线程（地图围绕我当前位置的居中）。

Answer 1

@ape在这里写了一个关于如何拦截地图点击的答案，但是我需要拦截这些触摸，然后他在答案的评论中建议了以下链接，How to handle onTouch event for map in Google Map API v2?。

该解决方案似乎是一种可能的解决方法，但建议的代码不完整。出于这个原因，我重新编写并测试了它，现在它可以工作。

这是工作代码：

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);
    }
}

在布局中我用这种方式声明：

<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"
/>

仅在主要活动中进行测试我只写了以下内容：

public class MainActivity extends FragmentActivity {
    public static boolean mMapIsTouched = false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

Answer 2

这是一个基于用户选择获取位置的简单解决方案（地图上的点击选项）

  googleMap.setOnMapClickListener(new OnMapClickListener() {

            @Override
            public void onMapClick(LatLng arg0) {
                // TODO Auto-generated method stub
                Log.d("arg0", arg0.latitude + "-" + arg0.longitude);
            }
        });

Answer 3

现在支持此功能以及更多功能：）

这是开发人员备注（问题4636）：

2016年8月发布了一系列用于摄像机动作启动，持续和结束事件的新摄像机更换监听器。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动作引起的。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

另外，请参阅发行说明： https://developers.google.com/maps/documentation/android-api/releases#august_1_2016

这是文档页面的代码片段

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();
    }
}

Answer 4

我在布局中的MapFragment顶部创建了一个空的FrameLayout。然后我在这个视图上设置了一个onTouchListener，所以我知道什么时候触摸了地图但是返回false，这样触摸就会被传递到地图上。

<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.
        }
    });

Answer 5

Gaucho有一个很好的答案，看到我认为可能需要另外一个实现的许多赞成票：

我需要它来使用听众所以我可以在触摸时作出反应，而不必经常检查。

我将所有内容放在一个可以像这样使用的类中：

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
        }
    }
});

其中mapfragment需要是TouchSupportMapFragment类型，而在布局xml中需要这一行：

<fragment class="de.bjornson.maps.TouchSupportMapFragment"
...

这是班级：

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);
        }
    }
}

Answer 6

https://developers.google.com/maps/documentation/android/reference/com/google/android/gms/maps/GoogleMap.OnMapClickListener

查看此链接。实现界面并填写onMapClick()方法或您需要的任何方法，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
    }
}

Answer 7

对于Mono爱好者：

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);
        }
    }
}

Answer 8

  // 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
            }
        }
    });

Answer 9

我从公认的答案中汲取了想法，并通过转换为Kotlin并添加了允许在标记中声明可触摸包装器的构造函数，并对触摸检测使用settable回调属性来消除与该按钮的直接耦合，从而对其进行了改进活动，使其更易于重用：

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)
    }
}

然后在您的布局中：

    <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>

然后按如下所示设置您的回调：

        findViewById<TouchableWrapper>(R.id.viewMapWrapper)
            .onTouch = {
            if (MotionEvent.ACTION_DOWN == it.action) {
                  //Handle touch down on the map
            }
        }

Answer 10

@Gaucho MySupportMapFragment显然会被其他一些fargment或activity使用（其中视图元素可能比地图片段多）。那么如何将此事件分派到下一个要使用它的片段。我们是否需要再次编写一个界面才能做到这一点？

Answer 11

我有一个与TouchableWrapper不同的更简单的解决方案，这适用于play-services-maps:10.0.1的最后一个版本。此解决方案仅使用maps事件，不使用自定义视图。不使用已弃用的函数，并且可能支持多个版本。

首先你需要一个标志变量来存储地图是通过动画还是通过用户输入来移动的（这个代码假设用户触发了动画未触发的每个相机移动）

GoogleMap googleMap;
boolean movedByApi = false;

您的隐私或活动必须实施GoogleMap.OnMapReadyCallback，GoogleMap.CancelableCallback

public class ActivityMap extends Activity implements OnMapReadyCallback, GoogleMap.CancelableCallback{
    ...
}

这会强制您实施方法onMapReady，onFinish，onCancel。并且onMapReady中的googleMap对象必须为摄像机移动设置事件监视器

@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;
}

如果你创建一个用于移动地图的通用函数

，最后它会更好

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);
}

或者每次移动地图时，都要在动画前激活标记

movedByApi = true;
googleMap.animateCamera(cu, this);

我希望这有帮助！

谷歌地图Android API v2 - 检测地图上的触摸

11 个答案: