Create terrain from a local raster

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
/*
 * Copyright 2019 Esri
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.esri.arcgisruntime.samples.createterrainfromalocalraster

import android.os.Bundle
import android.util.Log
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment
import com.esri.arcgisruntime.loadable.LoadStatus
import com.esri.arcgisruntime.mapping.ArcGISScene
import com.esri.arcgisruntime.mapping.BasemapStyle
import com.esri.arcgisruntime.mapping.RasterElevationSource
import com.esri.arcgisruntime.mapping.view.Camera
import com.esri.arcgisruntime.mapping.view.SceneView
import com.esri.arcgisruntime.samples.createterrainfromalocalraster.databinding.ActivityMainBinding
import java.util.*

class MainActivity : AppCompatActivity() {

    private val TAG = this::class.java.simpleName

    private val activityMainBinding by lazy {
        ActivityMainBinding.inflate(layoutInflater)
    }

    private val sceneView: SceneView by lazy {
        activityMainBinding.sceneView
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(activityMainBinding.root)

        // authentication with an API key or named user is required to access basemaps and other
        // location services
        ArcGISRuntimeEnvironment.setApiKey(BuildConfig.API_KEY)

        // create and add a scene with an imagery basemap
        sceneView.scene = ArcGISScene(BasemapStyle.ARCGIS_IMAGERY)

        // specify the initial camera position
        sceneView.setViewpointCamera(Camera(36.525, -121.80, 300.0, 180.0, 80.0, 0.0))

        // raster package file paths
        val filePaths = ArrayList<String>()
        filePaths.add(getExternalFilesDir(null)?.path + getString(R.string.raster_package_location))

        try {
            // add an elevation source to the scene by passing the URI of the raster package to the constructor
            with(RasterElevationSource(filePaths)) {
                // add a listener to perform operations when the load status of the elevation source changes
                this.addLoadStatusChangedListener { loadStatusChangedEvent ->
                    // when elevation source loads
                    if (loadStatusChangedEvent.newLoadStatus == LoadStatus.LOADED) {
                        // add the elevation source to the elevation sources of the scene
                        sceneView.scene.baseSurface.elevationSources.add(this)
                    } else if (loadStatusChangedEvent.newLoadStatus == LoadStatus.FAILED_TO_LOAD) {
                        // notify user that the elevation source has failed to load
                        logErrorToUser(
                            getString(
                                R.string.error_raster_elevation_source_load_failure_message,
                                this.loadError
                            )
                        )
                    }
                }
                // load the elevation source asynchronously
                this.loadAsync()
            }
        } catch (e: IllegalArgumentException) {
            // catch exception thrown by RasterElevationSource when a file is invalid/not found
            logErrorToUser(
                getString(
                    R.string.error_raster_elevation_source_load_failure_message,
                    e.message
                )
            )
        }
    }

    private fun AppCompatActivity.logErrorToUser(message: String) {
        Toast.makeText(this, message, Toast.LENGTH_LONG).show()
        Log.e(TAG, message)
    }
}