Create and use a raster layer made from a local raster file.
Use case
Rasters can be digital aerial photographs, imagery from satellites, digital pictures, or even scanned maps. An end-user will frequently need to import raster files acquired through various data-collection methods into their map to view and analyze the data.
How to use the sample
When the sample starts, a raster will be loaded from a file and displayed in the map view.
How it works
Create a Raster from a raster file.
Create a RasterLayer from the raster.
Add it as an operational layer with map.getOperationalLayers().add(rasterLayer).
Relevant API
Raster
RasterLayer
Additional information
See the topic What is raster data? in the ArcMap documentation for more information about raster images.
Extract the contents of the downloaded zip file to disk.
Open your command prompt and navigate to the folder where you extracted the contents of the data from step 1.
Push the data into the scoped storage of the sample app:
adb push raster-file /Android/data/com.esri.arcgisruntime.sample.rasterlayerfile/files/raster-file
Tags
data, image, import, layer, raster, visualization
Sample Code
MainActivity.java
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/* Copyright 2017 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.sample.rasterlayerfile;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.layers.RasterLayer;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.raster.Raster;
/**
* A sample class which demonstrates loading a Raster from the local device.
*/publicclassMainActivityextendsAppCompatActivity{
private MapView mMapView;
@OverrideprotectedvoidonCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// authentication with an API key or named user is required to access basemaps and other// location services ArcGISRuntimeEnvironment.setApiKey(BuildConfig.API_KEY);
// retrieve the MapView from layout mMapView = findViewById(R.id.mapView);
// create a raster from a local raster file Raster raster = new Raster(getExternalFilesDir(null) + getString(R.string.shasta_tif));
// create a raster layerfinal RasterLayer rasterLayer = new RasterLayer(raster);
// create a Map with imagery basemap ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_IMAGERY);
// add the map to a map view mMapView.setMap(map);
// add the raster as an operational layer map.getOperationalLayers().add(rasterLayer);
// set viewpoint on the raster rasterLayer.addDoneLoadingListener(() -> mMapView.setViewpointGeometryAsync(rasterLayer.getFullExtent(), 50));
}
@OverrideprotectedvoidonPause(){
mMapView.pause();
super.onPause();
}
@OverrideprotectedvoidonResume(){
super.onResume();
mMapView.resume();
}
@OverrideprotectedvoidonDestroy(){
mMapView.dispose();
super.onDestroy();
}
}