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[Android] Chapter 3 (7) Basic map control methods

WBOY
Release： 2016-07-06 13:30:30
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Category: C#, Android, VS2015, Baidu map application; Creation date: 2016-02-04 1. Introduction File name: Demo05MapControl.cs Introduction: Introduction to panning and zooming the map, operating the map with two fingers, monitoring map click events for details Description: (1) Introduce the get and set methods of map zoom level, rotation and overlooking degree; (2) Monitor clicks and long presses

Category: C#, Android, VS2015, Baidu map application; Creation date: 2016-02-04

1. Introduction

File name: Demo05MapControl.cs

Introduction: Introducing panning and zooming the map, operating the map with two fingers, and monitoring map click events

Details:

(1) Introducing the get and set methods of map zoom level, rotation and overlooking degree;

(2) Monitor click and long press map events;

(3) Click, double-click and long press the map to obtain the latitude and longitude coordinates of the point;

(4) Take a screenshot of the map display content. The screenshot save address is: /mnt/sdcard/test.png;

Run screenshot

The running effect in the x86 simulator is as follows:

[Android] Chapter 3 (7) Basic map control methods

2. Design steps

1. Add demo06_mapcontrol.axml

Add this file under the layout folder and change it to the following code: 

<?xml version=<span style="color: #800000;">"<span style="color: #800000;">1.0</span><span style="color: #800000;">"</span> encoding=<span style="color: #800000;">"</span><span style="color: #800000;">utf-8</span><span style="color: #800000;">"</span>?>
<linearlayout xmlns:android="<span" style="color: #800000;">"<span style="color: #800000;">http://schemas.android.com/apk/res/android</span><span style="color: #800000;">"</span><span style="color: #000000;">
    android:layout_width</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
    android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
    android:orientation</span>=<span style="color: #800000;">"</span><span style="color: #800000;">vertical</span><span style="color: #800000;">"</span> >

    LinearLayout
        android:layout_width=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
        android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">50dip</span><span style="color: #800000;">"</span><span style="color: #000000;">
        android:orientation</span>=<span style="color: #800000;">"</span><span style="color: #800000;">horizontal</span><span style="color: #800000;">"</span> >

        Button
            android:id=<span style="color: #800000;">"</span><span style="color: #800000;">@+id/zoombutton</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_width</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">wrap_content</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_weight</span>=<span style="color: #800000;">"</span><span style="color: #800000;">1</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:text</span>=<span style="color: #800000;">"</span><span style="color: #800000;">缩放</span><span style="color: #800000;">"</span> />

        EditText
            android:id=<span style="color: #800000;">"</span><span style="color: #800000;">@+id/zoomlevel</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_width</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">wrap_content</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_weight</span>=<span style="color: #800000;">"</span><span style="color: #800000;">1</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:text</span>=<span style="color: #800000;">"</span><span style="color: #800000;">10</span><span style="color: #800000;">"</span> />

        Button
            android:id=<span style="color: #800000;">"</span><span style="color: #800000;">@+id/rotatebutton</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_width</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">wrap_content</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_weight</span>=<span style="color: #800000;">"</span><span style="color: #800000;">1</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:text</span>=<span style="color: #800000;">"</span><span style="color: #800000;">旋转</span><span style="color: #800000;">"</span> />

        EditText
            android:id=<span style="color: #800000;">"</span><span style="color: #800000;">@+id/rotateangle</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_width</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">wrap_content</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_weight</span>=<span style="color: #800000;">"</span><span style="color: #800000;">1</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:text</span>=<span style="color: #800000;">"</span><span style="color: #800000;">90</span><span style="color: #800000;">"</span> />

        Button
            android:id=<span style="color: #800000;">"</span><span style="color: #800000;">@+id/overlookbutton</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_width</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">wrap_content</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_weight</span>=<span style="color: #800000;">"</span><span style="color: #800000;">1</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:text</span>=<span style="color: #800000;">"</span><span style="color: #800000;">俯视</span><span style="color: #800000;">"</span> />

        EditText
            android:id=<span style="color: #800000;">"</span><span style="color: #800000;">@+id/overlookangle</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_width</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">wrap_content</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_weight</span>=<span style="color: #800000;">"</span><span style="color: #800000;">1</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:text</span>=<span style="color: #800000;">"</span><span style="color: #800000;">-30</span><span style="color: #800000;">"</span> />
    </linearlayout>

    TextView
        android:id=<span style="color: #800000;">"</span><span style="color: #800000;">@+id/state</span><span style="color: #800000;">"</span><span style="color: #000000;">
        android:layout_width</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
        android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">wrap_content</span><span style="color: #800000;">"</span><span style="color: #000000;">
        android:lines</span>=<span style="color: #800000;">"</span><span style="color: #800000;">3</span><span style="color: #800000;">"</span><span style="color: #000000;">
        android:text</span>=<span style="color: #800000;">"</span><span style="color: #800000;">点击、长按、双击地图以获取经纬度和地图状态</span><span style="color: #800000;">"</span> />

    RelativeLayout
        android:layout_width=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
        android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
        android:orientation</span>=<span style="color: #800000;">"</span><span style="color: #800000;">vertical</span><span style="color: #800000;">"</span> >

        com.baidu.mapapi.map.TextureMapView
            android:id=<span style="color: #800000;">"</span><span style="color: #800000;">@+id/bmapView</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_width</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">fill_parent</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:clickable</span>=<span style="color: #800000;">"</span><span style="color: #800000;">true</span><span style="color: #800000;">"</span> />

        Button
            android:id=<span style="color: #800000;">"</span><span style="color: #800000;">@+id/savescreen</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_width</span>=<span style="color: #800000;">"</span><span style="color: #800000;">wrap_content</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_height</span>=<span style="color: #800000;">"</span><span style="color: #800000;">wrap_content</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_alignParentRight</span>=<span style="color: #800000;">"</span><span style="color: #800000;">true</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_alignParentTop</span>=<span style="color: #800000;">"</span><span style="color: #800000;">true</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:layout_marginTop</span>=<span style="color: #800000;">"</span><span style="color: #800000;">10dip</span><span style="color: #800000;">"</span><span style="color: #000000;">
            android:text</span>=<span style="color: #800000;">"</span><span style="color: #800000;">截图</span><span style="color: #800000;">"</span> />
Copy after login

2. Add Demo06MapControl.cs

Add this file under the SrcSdkDemos folder, and then change its content to the following code: 

<span style="color: #0000ff;">using</span><span style="color: #000000;"> Android.App;
</span><span style="color: #0000ff;">using</span><span style="color: #000000;"> Android.Content.PM;
</span><span style="color: #0000ff;">using</span><span style="color: #000000;"> Android.Graphics;
</span><span style="color: #0000ff;">using</span><span style="color: #000000;"> Android.OS;
</span><span style="color: #0000ff;">using</span><span style="color: #000000;"> Android.Widget;
</span><span style="color: #0000ff;">using</span><span style="color: #000000;"> Com.Baidu.Mapapi.Map;
</span><span style="color: #0000ff;">using</span><span style="color: #000000;"> Com.Baidu.Mapapi.Model;
</span><span style="color: #0000ff;">using</span><span style="color: #000000;"> System.IO;

</span><span style="color: #0000ff;">namespace</span><span style="color: #000000;"> BdMapV371Demos.SrcSdkDemos
{
    </span><span style="color: #808080;">///</span> <span style="color: #808080;"><summary></summary></span>
    <span style="color: #808080;">///</span><span style="color: #008000;"> 演示地图缩放，旋转，视角控制
    </span><span style="color: #808080;">///</span> <span style="color: #808080;"></span>
    [Activity(Label = <span style="color: #800000;">"</span><span style="color: #800000;">@string/demo_name_control</span><span style="color: #800000;">"</span><span style="color: #000000;">,
        ConfigurationChanges </span>= ConfigChanges.Orientation |<span style="color: #000000;"> ConfigChanges.KeyboardHidden,
        ScreenOrientation </span>=<span style="color: #000000;"> ScreenOrientation.Sensor)]
    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> Demo06MapControl : Activity,
        BaiduMap.IOnMapClickListener, BaiduMap.IOnMapLongClickListener,
        BaiduMap.IOnMapDoubleClickListener, BaiduMap.IOnMapStatusChangeListener,
        BaiduMap.ISnapshotReadyCallback
    {
        </span><span style="color: #0000ff;">PRivate</span><span style="color: #000000;"> TextureMapView mMapView;
        </span><span style="color: #0000ff;">private</span><span style="color: #000000;"> BaiduMap mBaiduMap;

        </span><span style="color: #808080;">///</span> <span style="color: #808080;"><summary></summary></span>
        <span style="color: #808080;">///</span><span style="color: #008000;"> 当前地点击点
        </span><span style="color: #808080;">///</span> <span style="color: #808080;"></span>
        <span style="color: #0000ff;">private</span><span style="color: #000000;"> LatLng currentPt;

        </span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">string</span><span style="color: #000000;"> touchType;

        </span><span style="color: #808080;">///</span> <span style="color: #808080;"><summary></summary></span>
        <span style="color: #808080;">///</span><span style="color: #008000;"> 用于显示地图状态的面板
        </span><span style="color: #808080;">///</span> <span style="color: #808080;"></span>
        <span style="color: #0000ff;">private</span><span style="color: #000000;"> TextView mStateBar;

        </span><span style="color: #0000ff;">protected</span> <span style="color: #0000ff;">override</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnCreate(Bundle savedInstanceState)
        {
            </span><span style="color: #0000ff;">base</span><span style="color: #000000;">.OnCreate(savedInstanceState);
            SetContentView(Resource.Layout.demo06_mapcontrol);

            mMapView </span>= FindViewById<texturemapview><span style="color: #000000;">(Resource.Id.bmapView);
            mBaiduMap </span>=<span style="color: #000000;"> mMapView.Map;
            mBaiduMap.SetMapStatus(MapStatusUpdateFactory.NewLatLng(MainActivity.HeNanUniversity));

            mStateBar </span>= FindViewById<textview><span style="color: #000000;">(Resource.Id.state);
            mBaiduMap.SetOnMapClickListener(</span><span style="color: #0000ff;">this</span><span style="color: #000000;">);
            mBaiduMap.SetOnMapLongClickListener(</span><span style="color: #0000ff;">this</span><span style="color: #000000;">);
            mBaiduMap.SetOnMapDoubleClickListener(</span><span style="color: #0000ff;">this</span><span style="color: #000000;">);
            mBaiduMap.SetOnMapStatusChangeListener(</span><span style="color: #0000ff;">this</span><span style="color: #000000;">);

            </span><span style="color: #0000ff;">var</span> btnZoom = FindViewById<button><span style="color: #000000;">(Resource.Id.zoombutton);
            btnZoom.Click </span>+= <span style="color: #0000ff;">delegate</span><span style="color: #000000;">
            {
                </span><span style="color: #008000;">//</span><span style="color: #008000;">处理缩放 sdk 缩放级别范围： [3.0, 19.0]</span>
                EditText t = FindViewById<edittext><span style="color: #000000;">(Resource.Id.zoomlevel);
                </span><span style="color: #0000ff;">try</span><span style="color: #000000;">
                {
                    </span><span style="color: #0000ff;">float</span> zoomLevel = <span style="color: #0000ff;">float</span><span style="color: #000000;">.Parse(t.Text);
                    MapStatusUpdate u </span>=<span style="color: #000000;"> MapStatusUpdateFactory.ZoomTo(zoomLevel);
                    mBaiduMap.AnimateMapStatus(u);
                }
                </span><span style="color: #0000ff;">catch</span><span style="color: #000000;">
                {
                    Toast.MakeText(</span><span style="color: #0000ff;">this</span>, <span style="color: #800000;">"</span><span style="color: #800000;">请输入正确的缩放级别</span><span style="color: #800000;">"</span><span style="color: #000000;">, ToastLength.Short).Show();
                }
                UpdateMapState();
            };

            </span><span style="color: #0000ff;">var</span> btnRotate = FindViewById<button><span style="color: #000000;">(Resource.Id.rotatebutton);
            btnRotate.Click </span>+= <span style="color: #0000ff;">delegate</span><span style="color: #000000;">
            {
                </span><span style="color: #008000;">//</span><span style="color: #008000;">处理旋转。旋转角范围：-180～180 , 单位：度，逆时针旋转</span>
                EditText t = FindViewById<edittext><span style="color: #000000;">(Resource.Id.rotateangle);
                </span><span style="color: #0000ff;">try</span><span style="color: #000000;">
                {
                    </span><span style="color: #0000ff;">int</span> rotateAngle = <span style="color: #0000ff;">int</span><span style="color: #000000;">.Parse(t.Text);
                    MapStatus ms </span>= <span style="color: #0000ff;">new</span><span style="color: #000000;"> MapStatus.Builder(mBaiduMap.MapStatus).Rotate(rotateAngle).Build();
                    MapStatusUpdate u </span>=<span style="color: #000000;"> MapStatusUpdateFactory.NewMapStatus(ms);
                    mBaiduMap.AnimateMapStatus(u);
                }
                </span><span style="color: #0000ff;">catch</span><span style="color: #000000;">
                {
                    Toast.MakeText(</span><span style="color: #0000ff;">this</span>, <span style="color: #800000;">"</span><span style="color: #800000;">请输入正确的旋转角度</span><span style="color: #800000;">"</span><span style="color: #000000;">, ToastLength.Short).Show();
                }
                UpdateMapState();
            };

            </span><span style="color: #0000ff;">var</span> btnOverlook = FindViewById<button><span style="color: #000000;">(Resource.Id.overlookbutton);
            btnOverlook.Click </span>+= <span style="color: #0000ff;">delegate</span><span style="color: #000000;">
            {
                </span><span style="color: #008000;">//</span><span style="color: #008000;">处理俯视。俯角范围：-45～0, 单位：度</span>
                EditText t = FindViewById<edittext><span style="color: #000000;">(Resource.Id.overlookangle);
                </span><span style="color: #0000ff;">try</span><span style="color: #000000;">
                {
                    </span><span style="color: #0000ff;">int</span> overlookAngle = <span style="color: #0000ff;">int</span><span style="color: #000000;">.Parse(t.Text);
                    MapStatus ms </span>= <span style="color: #0000ff;">new</span><span style="color: #000000;"> MapStatus.Builder(mBaiduMap.MapStatus).Overlook(overlookAngle).Build();
                    MapStatusUpdate u </span>=<span style="color: #000000;"> MapStatusUpdateFactory.NewMapStatus(ms);
                    mBaiduMap.AnimateMapStatus(u);
                }
                </span><span style="color: #0000ff;">catch</span><span style="color: #000000;">
                {
                    Toast.MakeText(</span><span style="color: #0000ff;">this</span>, <span style="color: #800000;">"</span><span style="color: #800000;">请输入正确的俯角</span><span style="color: #800000;">"</span><span style="color: #000000;">, ToastLength.Short).Show();
                }
                UpdateMapState();
            };

            </span><span style="color: #0000ff;">var</span> btnSaveScreen = FindViewById<button><span style="color: #000000;">(Resource.Id.savescreen);
            btnSaveScreen.Click </span>+= <span style="color: #0000ff;">delegate</span><span style="color: #000000;">
            {
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> 截图（在SnapshotReadyCallback中保存图片到sd卡）</span>
                mBaiduMap.Snapshot(<span style="color: #0000ff;">this</span><span style="color: #000000;">);
                Toast.MakeText(</span><span style="color: #0000ff;">this</span>, <span style="color: #800000;">"</span><span style="color: #800000;">正在截取屏幕图片...</span><span style="color: #800000;">"</span><span style="color: #000000;">, ToastLength.Short).Show();
                UpdateMapState();
            };
        }

        </span><span style="color: #0000ff;">#region</span> 实现BaiduMap.IOnMapClickListener接口
        <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnMapClick(LatLng p0)
        {
            touchType </span>= <span style="color: #800000;">"</span><span style="color: #800000;">单击</span><span style="color: #800000;">"</span><span style="color: #000000;">;
            currentPt </span>=<span style="color: #000000;"> p0;
            UpdateMapState();
        }

        </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">bool</span><span style="color: #000000;"> OnMapPoiClick(MapPoi p0)
        {
            </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;
        }
        </span><span style="color: #0000ff;">#endregion</span>

        <span style="color: #0000ff;">#region</span> 实现BaiduMap.IOnMapLongClickListener接口
        <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnMapLongClick(LatLng p0)
        {
            touchType </span>= <span style="color: #800000;">"</span><span style="color: #800000;">长按</span><span style="color: #800000;">"</span><span style="color: #000000;">;
            currentPt </span>=<span style="color: #000000;"> p0;
            UpdateMapState();
        }
        </span><span style="color: #0000ff;">#endregion</span>

        <span style="color: #0000ff;">#region</span> 实现BaiduMap.IOnMapDoubleClickListener接口
        <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnMapDoubleClick(LatLng p0)
        {
            touchType </span>= <span style="color: #800000;">"</span><span style="color: #800000;">双击</span><span style="color: #800000;">"</span><span style="color: #000000;">;
            currentPt </span>=<span style="color: #000000;"> p0;
            UpdateMapState();
        }
        </span><span style="color: #0000ff;">#endregion</span>

        <span style="color: #0000ff;">#region</span> 实现BaiduMap.IOnMapStatusChangeListener接口
        <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnMapStatusChange(MapStatus p0)
        {
            UpdateMapState();
        }

        </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnMapStatusChangeFinish(MapStatus p0)
        {
            UpdateMapState();
        }

        </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnMapStatusChangeStart(MapStatus p0)
        {
            UpdateMapState();
        }
        </span><span style="color: #0000ff;">#endregion</span>

        <span style="color: #0000ff;">#region</span> 实现BaiduMap.ISnapshotReadyCallback接口
        <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnSnapshotReady(Bitmap p0)
        {
            </span><span style="color: #0000ff;">string</span> file = <span style="color: #800000;">"</span><span style="color: #800000;">/mnt/sdcard/test.png</span><span style="color: #800000;">"</span><span style="color: #000000;">;
            FileStream outX;
            </span><span style="color: #0000ff;">try</span><span style="color: #000000;">
            {
                outX </span>= <span style="color: #0000ff;">new</span><span style="color: #000000;"> FileStream(file, FileMode.Create);
                </span><span style="color: #0000ff;">if</span><span style="color: #000000;"> (p0.Compress(
                        Bitmap.CompressFormat.Png, </span><span style="color: #800080;">100</span><span style="color: #000000;">, outX))
                {
                    outX.Flush();
                    outX.Close();
                }
                Toast.MakeText(</span><span style="color: #0000ff;">this</span><span style="color: #000000;">,
                        </span><span style="color: #800000;">"</span><span style="color: #800000;">屏幕截图成功，图片保存在: </span><span style="color: #800000;">"</span> +<span style="color: #000000;"> file.ToString(),
                        ToastLength.Short).Show();
            }
            </span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (FileNotFoundException e)
            {
                </span><span style="color: #0000ff;">throw</span><span style="color: #000000;"> e;
            }
            </span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (IOException e)
            {
                </span><span style="color: #0000ff;">throw</span><span style="color: #000000;"> e;
            }
        }
        </span><span style="color: #0000ff;">#endregion</span>

        <span style="color: #808080;">///</span> <span style="color: #808080;"><summary></summary></span>
        <span style="color: #808080;">///</span><span style="color: #008000;"> 更新地图状态显示面板
        </span><span style="color: #808080;">///</span> <span style="color: #808080;"></span>
        <span style="color: #0000ff;">private</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> UpdateMapState()
        {
            </span><span style="color: #0000ff;">if</span> (mStateBar == <span style="color: #0000ff;">null</span><span style="color: #000000;">)
            {
                </span><span style="color: #0000ff;">return</span><span style="color: #000000;">;
            }
            </span><span style="color: #0000ff;">string</span> state = <span style="color: #800000;">""</span><span style="color: #000000;">;
            </span><span style="color: #0000ff;">if</span> (currentPt == <span style="color: #0000ff;">null</span><span style="color: #000000;">)
            {
                state </span>= <span style="color: #800000;">"</span><span style="color: #800000;">点击、长按、双击地图以获取经纬度和地图状态</span><span style="color: #800000;">"</span><span style="color: #000000;">;
            }
            </span><span style="color: #0000ff;">else</span><span style="color: #000000;">
            {
                state </span>= <span style="color: #0000ff;">string</span>.Format(touchType + <span style="color: #800000;">"</span><span style="color: #800000;">,当前经度：{0:f6} 当前纬度：{1:f6}</span><span style="color: #800000;">"</span><span style="color: #000000;">,
                        currentPt.Longitude, currentPt.Latitude);
            }
            state </span>+= <span style="color: #800000;">"</span><span style="color: #800000;">\n</span><span style="color: #800000;">"</span><span style="color: #000000;">;
            MapStatus ms </span>=<span style="color: #000000;"> mBaiduMap.MapStatus;
            state </span>+= <span style="color: #0000ff;">string</span>.Format(<span style="color: #800000;">"</span><span style="color: #800000;">zoom={0:f2}，rotate={1:d}，overlook={2:d}</span><span style="color: #800000;">"</span><span style="color: #000000;">,
                    ms.Zoom, (</span><span style="color: #0000ff;">int</span>)ms.Rotate, (<span style="color: #0000ff;">int</span><span style="color: #000000;">)ms.Overlook);
            mStateBar.Text </span>=<span style="color: #000000;"> state;
        }

        </span><span style="color: #0000ff;">protected</span> <span style="color: #0000ff;">override</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnPause()
        {
            mMapView.OnPause();
            </span><span style="color: #0000ff;">base</span><span style="color: #000000;">.OnPause();
        }

        </span><span style="color: #0000ff;">protected</span> <span style="color: #0000ff;">override</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnResume()
        {
            mMapView.OnResume();
            </span><span style="color: #0000ff;">base</span><span style="color: #000000;">.OnResume();
        }

        </span><span style="color: #0000ff;">protected</span> <span style="color: #0000ff;">override</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> OnDestroy()
        {
            mMapView.OnDestroy();
            </span><span style="color: #0000ff;">base</span><span style="color: #000000;">.OnDestroy();
        }
    }
}</span></button></edittext></button></edittext></button></edittext></button></textview></texturemapview>
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3. Modify MainActivity.cs

Add the following code in the demos field definition of the MainActivity.cs file. 

<span style="color: #008000;">          //</span><span style="color: #008000;">示例6--地图操作功能</span>
            <span style="color: #0000ff;">new</span> DemoInfo<activity><span style="color: #000000;">(Resource.String.demo_title_control,
                Resource.String.demo_desc_control,
                </span><span style="color: #0000ff;">new</span> Demo06MapControl()),</activity>
Copy after login

Run and observe the results.


Related labels：
android Classification map Basic control method
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