[Android] Chapter 3 (7) Basic map control methods
androidClassificationmapBasiccontrolmethod
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](http://www.68idc.cn/help/uploads/allimg/160619/094T2C49-0.png?x-oss-process=image/resize,p_40 "[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> />
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>
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>
Run and observe the results.
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