ArcGIS for Android 实现地图基本操作

地图基本操作

1.前期项目准备

1.1. 创建新工程

  • 新建一个空活动项目

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  • 选择语言、平台,修改命名等

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1.2. 添加ArcGIS SDK

  • build.gradle (Project: <project name>)添加

    maven {
        url 'https://esri.jfrog.io/artifactory/arcgis'
    }
    
  • build.gradle (Module: <module name>)添加

    implementation 'com.esri.arcgisruntime:arcgis-android:100.10.0'
    
  • Gradle更新:Sync Project with Gradle Files

  • AndroidManifest.xml添加

    //网络权限
    <uses-permission android:name="android.permission.INTERNET" />
    //use a MapView (2D) require at least OpenGL ES 2.x:
    <uses-feature android:glEsVersion="0x00020000" android:required="true" />
    
  • appdbuild.gradle(Module:app)的android部分指定Java版本

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    

1.3. 添加MapView地图控件

  • 修改activity_main.xml,替换TextView

        <com.esri.arcgisruntime.mapping.view.MapView
                android:id="@+id/mapView"
                android:layout_height="fill_parent"
                android:layout_width="fill_parent" 
                tools:ignore="MissingConstraints">
        </com.esri.arcgisruntime.mapping.view.MapView>
    

1.4 数据准备

IDEA中点击菜单中的viewtool windowsdevice file explorer,打开如下视图,找到mnt下的sdcard,这个就是我们的手机常用的存储位置。

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sdcard中新建文件夹,并upload地图文件,此处上传shape fileTPKMMPK文件

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2.添加界面操作

2.1 定义文本

strings.xml中完成文本的定义(规范化做法,其实也不是必须这样,这样可便于日后维护,比如更换界面语言)

<resources>
    <string name="app_name">EX03</string>
    <string name="btnZoomIn">放大</string>
    <string name="btnZoomOut">缩小</string>
    <string name="btnRotation">旋转</string>
    <string name="btnScale">缩放</string>
    <string name="btnLayers">图层</string>
</resources>

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2.2 设计界面

打开activity_main.xml,可切换设计界面和代码界面进行设计。此处先在mapView中添加一个LinearLayout horizontal,再在LinearLayout horizontal中添加button,并修改属性。

xml文件如下:

    <LinearLayout
            android:orientation="horizontal"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
        <Button
                android:text="@string/btnZoomIn"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" android:layout_weight="1" tools:ignore="ButtonStyle"
                android:id="@+id/buttonZoomIn"/>
        <Button
                android:text="@string/btnZoomOut"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" android:id="@+id/buttonZoomOut" android:layout_weight="1"
                tools:ignore="ButtonStyle"/>
        <Button
                android:text="@string/btnRotation"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" android:id="@+id/buttonRotation" android:layout_weight="1"
                tools:ignore="ButtonStyle"/>
        <Button
                android:text="@string/btnScale"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" android:id="@+id/buttonScale" android:layout_weight="1"
                tools:ignore="ButtonStyle"/>
        <Button
                android:text="@string/btnLayers"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content" android:id="@+id/buttonLayers" android:layout_weight="1"
                tools:ignore="ButtonStyle"/>
    </LinearLayout>

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3. 添加方法支持

3.1 加载在线地图

  • 添加private MapView mMapView;

  • 引用import com.esri.arcgisruntime.mapping.view.MapView; (IDE可能会自动导入)

  • onCreate事件中设置地图

            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            mMapView=findViewById(R.id.mapView);
            ArcGISMap map =new ArcGISMap(Basemap.Type.TOPOGRAPHIC,34.056295,-117.195800,16);
            mMapView.setMap(map);
    
  • 重载onPauseonResumeonDestroy事件

        @Override
        protected void onPause() {
            mMapView.pause();
            super.onPause();
        }
    
        @Override
        protected void onResume() {
            super.onResume();
            mMapView.resume();
        }
    
        @Override
        protected void onDestroy() {
            mMapView.dispose();
            super.onDestroy();
        }
    

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3.2 完善放大方法

  • 添加函数protected void registerButtonClick()

  • protected void registerButtonClick()中添加代码

            Button buttonZoomIn=(Button)findViewById(R.id.buttonZoomIn);
    		buttonZoomIn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mMapView.setViewpointScaleAsync(mMapView.getMapScale()*0.5);
                }
            });
    
    
  • onCreate函数中添加registerButtonClick()调用

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3.3 完善缩小方法

  • protected void registerButtonClick()中添加代码

            Button buttonZoomOut=(Button)findViewById(R.id.buttonZoomOut);
            buttonZoomOut.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    mMapView.setViewpointScaleAsync(mMapView.getMapScale()*2.0);
                }
            });
    

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3.4 完善旋转方法

  • protected void registerButtonClick()中添加代码

          Button buttonRotation=(Button)findViewById(R.id.buttonRotation);
          buttonRotation.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v) {
                  mMapView.setViewpointRotationAsync(mMapView.getMapRotation()+10.0);
              }
          });
    
    

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3.5 完善图层管理方法

  • 由于上述在线加载的地图没有多图层,此处加载离线多图层地图

    • 添加变量

          private static final String TAG =MainActivity.class.getSimpleName();
          private MobileMapPackage mobileMapPackage;
      
          private final String MMPKPath= Environment.getExternalStorageDirectory() +"/EXFile/Yellowstone.mmpk";
      
    • 添加引用

      package com.example.ex02;
      
      import android.Manifest;
      import android.content.pm.PackageManager;
      import android.os.Environment;
      import android.util.Log;
      import android.widget.Toast;
      import androidx.annotation.NonNull;
      import androidx.appcompat.app.AppCompatActivity;
      import android.os.Bundle;
      import androidx.core.app.ActivityCompat;
      import androidx.core.content.ContextCompat;
      import com.esri.arcgisruntime.data.TileCache;
      import com.esri.arcgisruntime.layers.ArcGISTiledLayer;
      import com.esri.arcgisruntime.loadable.LoadStatus;
      import com.esri.arcgisruntime.mapping.ArcGISMap;
      import com.esri.arcgisruntime.mapping.Basemap;
      import com.esri.arcgisruntime.mapping.MobileMapPackage;
      import com.esri.arcgisruntime.mapping.view.MapView;
      
      
    • 设置权限请求

          private void requestPermission() {
              String[] reqPermission=new String[]{Manifest.permission.READ_EXTERNAL_STORAGE};
              int reqCode=2;
              if (ContextCompat.checkSelfPermission(MainActivity.this,reqPermission[0])== PackageManager.PERMISSION_GRANTED){
                  loadMMPK(MMPKPath);
              }else {
                  ActivityCompat.requestPermissions(MainActivity.this,reqPermission,reqCode);
              }
          }
      
          @Override
          public void onRequestPermissionsResult(int requestCode, @NonNull @org.jetbrains.annotations.NotNull String[] permissions, @NonNull @org.jetbrains.annotations.NotNull int[] grantResults) {
              super.onRequestPermissionsResult(requestCode, permissions, grantResults);
              if (grantResults.length>0&&grantResults[0]==PackageManager.PERMISSION_GRANTED){
                  loadMMPK(MMPKPath);
              }else {
                  Toast.makeText(MainActivity.this,"permission denied!",Toast.LENGTH_SHORT);
              }
          }
      
    • 添加方法支持

          private boolean loadMMPK(String path){
              try {
                  mobileMapPackage = new MobileMapPackage(path);
                  mobileMapPackage.loadAsync();
                  mobileMapPackage.addDoneLoadingListener(()->{
                      if (mobileMapPackage.getLoadStatus()== LoadStatus.LOADED && !mobileMapPackage.getMaps().isEmpty()){
                          mapView.setMap(mobileMapPackage.getMaps().get(0));
                      }else {
                          String error ="Error loading mobile map package : " + mobileMapPackage.getLoadError().getMessage();
                          Toast.makeText(this,error,Toast.LENGTH_SHORT);
                      }
                  });
                  return true;
              }catch (Exception e){
                  return false;
          	}
          }
      
    • onCreate中添加requestPermission()调用

  • 运行测试

点击运行后,Android模拟器中将打开生成的App

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  • protected void registerButtonClick()中添加代码

          Button buttonLayers=(Button)findViewById(R.id.buttonLayers);
          buttonLayers.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v) {
                  int size=mMapView.getMap().getOperationalLayers().size();
                  final String[] names=new String[size];
                  for (int i=0;i<size;i++){
                      names[i]=mMapView.getMap().getOperationalLayers().get(i).getName();
                  }
    
                  AlertDialog alertDialog=new AlertDialog.Builder(MainActivity.this)
                          .setTitle("请选择图层")
                          .setItems(names, new DialogInterface.OnClickListener() {
                              @Override
                              public void onClick(DialogInterface dialog, int which) {
      							//设置图层操作代码,此处只是简单的移除图层
                                  mMapView.getMap().getOperationalLayers().remove(which);
                              }
                          })
                          .show();
              }
          });
    
    

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3.6 完善比例尺方法

  • protected void registerButtonClick()中添加代码

          Button buttonScale=(Button)findViewById(R.id.buttonScale);
          buttonScale.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View v) {
                  final String[] scale=new String[]{"100000","50000","10000","5000"};
                  final int[] scales=new int[] {100000,50000,10000,5000};
                  AlertDialog alertDialog=new AlertDialog.Builder(MainActivity.this)
                          .setTitle("请选择比例尺")
                          .setItems(scale, new DialogInterface.OnClickListener() {
                              @Override
                              public void onClick(DialogInterface dialog, int which) {
                                  mMapView.setViewpointScaleAsync(scales[which]);
                              }
                          })
                          .show();
              }
          });
    
    

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posted @ 2021-06-13 20:37  当时明月在曾照彩云归  阅读(867)  评论(0编辑  收藏  举报