com.esri.arcgisruntime.sample.symbolizeshapefile.MainActivity.java Source code

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Here is the source code for com.esri.arcgisruntime.sample.symbolizeshapefile.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.symbolizeshapefile;

import android.Manifest;
import android.content.pm.PackageManager;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Environment;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

import com.esri.arcgisruntime.data.ShapefileFeatureTable;
import com.esri.arcgisruntime.geometry.Point;
import com.esri.arcgisruntime.geometry.SpatialReference;
import com.esri.arcgisruntime.layers.FeatureLayer;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.Basemap;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.MapView;
import com.esri.arcgisruntime.symbology.SimpleFillSymbol;
import com.esri.arcgisruntime.symbology.SimpleLineSymbol;
import com.esri.arcgisruntime.symbology.SimpleRenderer;

public class MainActivity extends AppCompatActivity {

    private MapView mMapView;
    private ArcGISMap mMap;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // inflate MapView from layout
        mMapView = findViewById(R.id.mapView);
        // create a map with the BasemapType topographic
        mMap = new ArcGISMap(Basemap.createTopographic());
        // set the map to be displayed in this view
        mMapView.setMap(mMap);

        // set an initial viewpoint
        Point point = new Point(-11662054, 4818336, SpatialReference.create(3857));
        Viewpoint viewpoint = new Viewpoint(point, 200000);
        mMap.setInitialViewpoint(viewpoint);

        requestWritePermission();

    }

    private void symbolizeShapefile() {

        // create a shapefile feature table from the local data
        ShapefileFeatureTable shapefileFeatureTable = new ShapefileFeatureTable(
                Environment.getExternalStorageDirectory() + getString(R.string.shapefile_folder)
                        + getString(R.string.subdivisions_shp));

        // use the shapefile feature table to create a feature layer
        FeatureLayer featureLayer = new FeatureLayer(shapefileFeatureTable);

        // create the Symbol
        SimpleLineSymbol lineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, Color.RED, 1.0f);
        SimpleFillSymbol fillSymbol = new SimpleFillSymbol(SimpleFillSymbol.Style.SOLID, Color.YELLOW, lineSymbol);

        // create the Renderer
        SimpleRenderer renderer = new SimpleRenderer(fillSymbol);

        // set the Renderer on the Layer
        featureLayer.setRenderer(renderer);

        // add the feature layer to the map
        mMap.getOperationalLayers().add(featureLayer);
    }

    /**
     * Request read permission on the device.
     */
    private void requestWritePermission() {
        // define permission to request
        String[] reqPermission = new String[] { Manifest.permission.READ_EXTERNAL_STORAGE };
        int requestCode = 2;
        // For API level 23+ request permission at runtime
        if (ContextCompat.checkSelfPermission(MainActivity.this,
                reqPermission[0]) == PackageManager.PERMISSION_GRANTED) {
            symbolizeShapefile();
        } else {
            // request permission
            ActivityCompat.requestPermissions(MainActivity.this, reqPermission, requestCode);
        }
    }

    /**
     * Handle the permissions request response.
     */
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
            @NonNull int[] grantResults) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            symbolizeShapefile();
        } else {
            // report to user that permission was denied
            Toast.makeText(MainActivity.this, getResources().getString(R.string.shapefile_read_permission_denied),
                    Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        mMapView.pause();
    }

    @Override
    protected void onResume() {
        super.onResume();
        mMapView.resume();
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mMapView.dispose();
    }
}