ArcGIS Android 10.2.7开发实战：从基础到高级功能

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本篇文档是ArcGIS for Android 10.2.7开发指南，旨在帮助开发者深入了解并掌握如何利用Esri的ArcGIS Runtime SDK构建功能丰富的Android应用程序。以下是主要内容概要： 1. **入门与安装设置**： - 开始学习前，介绍了如何安装和配置ArcGIS Android SDK，确保开发环境的准备就绪。 2. **应用开发工具包（Application Toolkit for ArcGIS Android）**： - 提供了教程，如如何将地图添加到应用程序中，展示基本的地图和图层操作，包括添加基础地图、云数据访问和地理编码功能。 3. **地图与图层**： - 深入讲解地图类型，如不同类型的图层（矢量图层、栅格图层等），以及如何处理符号和渲染器，增强地图的可视化效果。 4. **特征和图形**： - 介绍了如何处理空间参考系统，这对于地理位置的准确表示至关重要。此外，还包括离线地图创建，支持时间感知图层和显示矢量图形与文本。 5. **地图交互与定制**： - 如何添加图形和文字，创建图形图层，管理图形特性，以及实现地图上的视图提示（pop-ups）和自定义呼叫框（callouts）。此外，还涉及军事消息显示和搜索功能。 6. **搜索功能**： - 提供两种搜索方式：搜索地点和坐标，以便在应用程序中方便地进行位置查找。 7. **编辑功能**： - 编辑功能模块涵盖了编辑地理信息的能力，包括基本的编辑操作，以及同步离线编辑和针对ArcGIS Feature Layer的编辑操作。 8. **路线与导航**： - 如何使用SDK寻找路径和显示驾驶方向，提供实用的导航功能。 9. **任务与分析**： - 对ArcGIS中的任务进行了概述，并指导如何在应用程序中显示任务结果和执行分析操作。 10. **与云端和服务集成**： - 学习如何利用ArcGIS平台提供的云服务，访问数据和进行更高级的功能，如几何操作。版权信息表明，此文档受Esri所有，版权所有，适用于1995年至2015年期间。本指南详细全面地覆盖了ArcGIS for Android 10.2.7开发所需的关键技能和功能，无论你是初学者还是有经验的开发者，都能从中获取宝贵的知识来构建高效且功能强大的地理信息系统应用。通过遵循本指南的步骤，开发者可以熟练地将Esri的GIS技术融入自己的Android项目中。

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2. In the Android project view window, under Gradle Scripts, double-click build.gradle (Module: app).

3. In the dependencies section of the script, add a new value compile 'com.esri.arcgis.android:arcgis-

android:10.2.7'. The full dependencies section should now look like the code below:

dependencies {

compile 'com.esri.arcgis.android:arcgis-android:10.2.7'

compile fileTree(dir: 'libs', include: ['*.jar'])

compile 'com.android.support:appcompat-v7:22.1.0'

}

4. In the android section of the script, after defaultConfig, add the following values:

packagingOptions{

exclude 'META-INF/LGPL2.1'

exclude 'META-INF/LICENSE'

exclude 'META-INF/NOTICE'

}

5. In the Android Studio toolbar, click Sync Project with Gradle Files. Alternatively, when you see the Gradle files have

changed since last project sync message at the top of the gradle script window, click Sync Now.

You have added a dependency to the Runtime Android SDK AAR to your app module. Next, you'll add code to your activity to add a

MapView.

Set up the initial map with topo basemap

This step creates a MapView and adds the Topo basemap as its initial basemap. You will also set an initial zoom level and center the

map.

Steps:

1. In the Android project view window, under app, navigate to res > layout, then double-click activity_main.xml.

2. At the bottom-left of the window, click Text to show the XML view of the layout.

3. Select the entire TextView XML element and replace it with a MapView element as shown below.

<com.esri.android.map.MapView

android:id="@+id/map"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

mapoptions.MapType="Topo"

mapoptions.ZoomLevel="13"

mapoptions.center="33.666354, -117.903557" />

This MapView element has mapoptions attributes that tell the MapView to display initially using a default Topo map service

layer, and to center the map at a specific set of coordinates, and zoom the map to a specific level.

4. In the Android project view window, under app, navigate to java > com.esri.android.tutorials.basemaps, then double-

click MainActivity to open the activity source code file.

5. Add the following class variable declaration to the top of the MainActivity class:

// The MapView.

MapView mMapView = null;

This variable will hold a reference to the MapView you added to the layout.

6. Android Studio will highlight in red the classes which must be imported to the class file. Place the cursor at the line with text

highlighted in red and press ALT+Enter to resolve the symbol and import the com.esri.android.map.MapView class to

your activity class.

You should resolve symbols for any similar errors you get throughout this tutorial.

ArcGIS Runtime SDK for Android

Note: A complete list of imports is available at the end of this tutorial so you can check you have

imported the classes correctly.

7. In the OnCreate method, after the content view is set, set the reference to the MapView in the layout, and also enable

wrap-around maps and the Esri logo in the map:

// Retrieve the map and initial extent from XML layout

mMapView = (MapView) findViewById(R.id.map);

// Enable map to wrap around date line.

mMapView.enableWrapAround(true);

8. Override the onPause and onResume methods of the activity, and add the code below to pause and unpause the MapView

when these methods are called.

protected void onPause() {

super.onPause();

mMapView.pause();

}

protected void onResume() {

super.onResume();

mMapView.unpause();

}

You now have an app that includes a map. Next you will create the options menu items to change the basemap.

Add the basemaps options menu

Now you will define the options menu of basemaps and add code to respond when a menu option is tapped.

Steps:

1. In the Android project view window, under app, navigate to res > menu, then double-click menu_main.xml.

2. Replace the existing item element with the following elements:

<item

android:id="@+id/World_Street_Map"

android:showAsAction="never"

android:title="@string/StreetMapMenu" />

<item

android:id="@+id/World_Topo"

android:showAsAction="never"

android:title="@string/TopoMenu" />

<item

android:id="@+id/Gray"

android:showAsAction="never"

android:title="@string/GrayMenu" />

<item

android:id="@+id/Ocean_Basemap"

android:showAsAction="never"

android:title="@string/OceanMenu" />

</group>

This defines the basemap options in the options menu layout.

3. In the Android project view window, under app, navigate to res > values, then double-click strings.xml.

4. Add the following string resources:

<string name="StreetMapMenu">Streets</string>

<string name="TopoMenu">Topographic</string>

<string name="OceanMenu">Oceans</string>

These strings are used for the user interface of the options menu items for basemaps.

5. In the Android project view window, under app, navigate to java > com.esri.android.tutorials.basemaps, then double-

click MainActivity to open the activity source code file.

6. Add the following class variable declarations to the top of the MainActivity class:

// The basemap switching menu items.

MenuItem mStreetsMenuItem = null;

MenuItem mTopoMenuItem = null;

MenuItem mGrayMenuItem = null;

MenuItem mOceansMenuItem = null;

// Create MapOptions for each type of basemap.

final MapOptions mTopoBasemap = new MapOptions(MapOptions.MapType.TOPO);

final MapOptions mStreetsBasemap = new MapOptions(MapOptions.MapType.STREETS);

final MapOptions mGrayBasemap = new MapOptions(MapOptions.MapType.GRAY);

final MapOptions mOceansBasemap = new MapOptions(MapOptions.MapType.OCEANS);

ArcGIS Runtime SDK for Android

These variables define:

• The MenuItems in the options menu

• MapOptions that will be used to set different basemaps in the MapView

7. In the onCreateOptionsMenu method, add the following lines of code after the

getMenuInflater.inflate(R.menu.menu_main, menu) line, and before the return true line.

// Get the basemap switching menu items.

mStreetsMenuItem = menu.getItem(0);

mTopoMenuItem = menu.getItem(1);

mGrayMenuItem = menu.getItem(2);

mOceansMenuItem = menu.getItem(3);

// Also set the topo basemap menu item to be checked, as this is the default.

mTopoMenuItem.setChecked(true);

This sets the variables you added previously to the menu items created when the options menu you defined in the menu

layout is first shown; you will use these references in a following step. As your initial map shows the Topo map, set this to be

checked.

8. In the onOptionsItemSelected method, replace all of the method body with the following code:

// Handle menu item selection.

switch (item.getItemId()) {

case R.id.World_Street_Map:

mMapView.setMapOptions(mStreetsBasemap);

mStreetsMenuItem.setChecked(true);

return true;

case R.id.World_Topo:

mMapView.setMapOptions(mTopoBasemap);

mTopoMenuItem.setChecked(true);

return true;

case R.id.Gray:

mMapView.setMapOptions(mGrayBasemap);

mGrayMenuItem.setChecked(true);

return true;

case R.id.Ocean_Basemap:

mMapView.setMapOptions(mOceansBasemap);

mOceansMenuItem.setChecked(true);

return true;

default:

return super.onOptionsItemSelected(item);

}

This code identifies the selected menu option and sets the appropriate MapOptions onto the MapView.

You have completed coding your basemaps app, and are now ready to test it.

Run the application

To test your app, you should either have a connected device ready for debugging, or have a set up and started an emulator. To find our

more, refer to the Android documentation on Using the emulator or Using hardware devices.

Steps:

1. In the Android Studio toolbar, click Run.

2. In the Choose Device dialog, select the device or emulator you wish to use, then click OK

3. When the app opens on your device, it shows a topological map showing a town in California.

4. In the action bar of the app, tap the options overflow, and select Gray.

The map updates to show a gray basemap instead.

ArcGIS Runtime SDK for Android

Access feature data in the cloud

Feature services expose REST endpoints to store and query geographic data such as points, lines, and polygons. The ArcGIS Runtime

SDK for Android provides APIs to work with display and query features from these service. This tutorial shows you how to add a feature

service that is hosted in ArcGIS.com to a map as a layer, and how to perform a query on the features in the service.

Create the QueryCloudFeatureService project in Android Studio

Start by creating a new Android application project. These steps are essentially the same as covered in the Add a map to your app tutorial.

For more information about the project set up steps, refer to the Add a map to your app tutorial.

Steps:

1. In the Android Studio Welcome screen, under Quick Start, click Start a new Android Studio project.

2. In Application name, enter QueryCloudFeatureService. Optionally change the Company Name and Project Location

if you want to, then click Next.

3. Leave the default Phone and Tablet option selected, in the Minimum SDK drop-down list, choose API 15: Android 4.0.3,

then click Next.

4. Click Blank Activity, then click Next.

5. Leave the default names for the activity, layout, title, and menu resource, and click Finish.

A new default Android application project opens, showing a default layout.

You have now successfully created an Android project containing an application module. Next you will add the Runtime Android SDK

Android dependency.

Add the ArcGIS Runtime for Android AAR dependency

Here you will add the Runtime Android SDK dependency to your application module as an Android Archive (AAR) package.

Steps:

1. In the Android project view window, under Gradle Scripts, double-click build.gradle (Project: HelloWorld). This opens

the gradle build script for the project where you can add the Esri ArcGIS Maven repository URL as shown below:

allprojects {

repositories {

jcenter()

// add the esri arcgis maven repo

maven {

url 'http://esri.bintray.com/arcgis'

}

2. In the Android project view window, under Gradle Scripts, double-click build.gradle (Module: app).

ArcGIS Runtime SDK for Android

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