A user may wish to view the map in an orientation other than north-facing.
How to use the sample
Use the progress bar to rotate the map. If the map is not pointed north, the progress bar will show the heading relative to north in degrees. Slide the progress bar to zero to set the maps's heading back to north.
How it works
Instantiate an ArcGISMap object.
Set the map to a MapView object.
Use setViewpointRotationAsync(...) to set the rotation angle.
Relevant API
ArcGISMap
MapView
Tags
rotate, rotation, viewpoint
Sample Code
MainActivity.java
/*
* Copyright 2015 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.maprotation;
import android.os.Bundle;
import android.widget.SeekBar;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
import com.esri.arcgisruntime.ArcGISRuntimeEnvironment;
import com.esri.arcgisruntime.mapping.ArcGISMap;
import com.esri.arcgisruntime.mapping.BasemapStyle;
import com.esri.arcgisruntime.mapping.Viewpoint;
import com.esri.arcgisruntime.mapping.view.MapView;
publicclassMainActivityextendsAppCompatActivity{
private MapView mMapView;
private TextView mRotationValueText;
@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);
// create MapView from layout mMapView = findViewById(R.id.mapView);
// create a map with the Basemap.Type topographic ArcGISMap map = new ArcGISMap(BasemapStyle.ARCGIS_TOPOGRAPHIC);
// set the map to be displayed in this view mMapView.setMap(map);
mMapView.setViewpoint(new Viewpoint( 34.056295, -117.195800, 100000));
// create TextView to show angle of rotation mRotationValueText = findViewById(R.id.rotationValueText);
// create SeekBar SeekBar mRotationSeekBar = findViewById(R.id.rotationSeekBar);
mRotationSeekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@OverridepublicvoidonProgressChanged(SeekBar seekBar, int angle, boolean b){
// convert progress to doubledouble dAngle = angle;
// set the text to SeekBar value mRotationValueText.setText(String.valueOf(angle));
// rotate MapView to double angle value mMapView.setViewpointRotationAsync(dAngle);
}
@OverridepublicvoidonStartTrackingTouch(SeekBar seekBar){
}
@OverridepublicvoidonStopTrackingTouch(SeekBar seekBar){
}
});
}
@OverrideprotectedvoidonPause(){
super.onPause();
mMapView.pause();
}
@OverrideprotectedvoidonResume(){
super.onResume();
mMapView.resume();
}
@OverrideprotectedvoidonDestroy(){
super.onDestroy();
mMapView.dispose();
}
}