Table of Contents
1. Introduction
2. Design steps
1. Add demo06_mapcontrol.axml
2. Add Demo06MapControl.cs
3. Modify MainActivity.cs
Home php教程 php手册 [Android] Chapter 3 (7) Basic map control methods

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

Jul 06, 2016 pm 01:30 PM
android Classification map Basic control method

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:

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<?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:

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<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>

Copy after login

3. Modify MainActivity.cs

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

1

2

3

4

<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.


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