データのタイムラプス

package com.mapbox.mapboxandroiddemo.examples.dds;
 
import android.os.Bundle;
import android.os.Handler;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
 
import com.mapbox.mapboxandroiddemo.R;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.maps.Style;
import com.mapbox.mapboxsdk.style.expressions.Expression;
import com.mapbox.mapboxsdk.style.layers.FillLayer;
import com.mapbox.mapboxsdk.style.layers.PropertyFactory;
import com.mapbox.mapboxsdk.style.sources.VectorSource;
 
import static com.mapbox.mapboxsdk.style.expressions.Expression.eq;
import static com.mapbox.mapboxsdk.style.expressions.Expression.get;
import static com.mapbox.mapboxsdk.style.expressions.Expression.interpolate;
import static com.mapbox.mapboxsdk.style.expressions.Expression.literal;
import static com.mapbox.mapboxsdk.style.expressions.Expression.stop;
import static com.mapbox.mapboxsdk.style.layers.Property.VISIBLE;
import static com.mapbox.mapboxsdk.style.layers.PropertyFactory.fillColor;
 
/**
* Style a rainfall map by get data from url
*/
public class AddRainFallStyleActivity extends AppCompatActivity implements OnMapReadyCallback {
public static final String ID_SOURCE = "source-id";
public static final String ID_LAYER = "layer-id";
public static final String SOURCE_URL = "mapbox://examples.dwtmhwpu";
private MapView mapView;
private Handler handler;
private FillLayer layer;
private int index = 1;
private RefreshGeoJsonRunnable refreshGeoJsonRunnable;
 
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
 
// Mapbox access token is configured here. This needs to be called either in your application
// object or in the same activity which contains the mapview.
Mapbox.getInstance(this, getString(R.string.access_token));
 
// This contains the MapView in XML and needs to be called after the account manager
setContentView(R.layout.activity_style_rainfall);
 
handler = new Handler();
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(this);
}
 
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
mapboxMap.setStyle(Style.LIGHT, new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
addRadarData(style);
refreshGeoJsonRunnable = new RefreshGeoJsonRunnable();
do {
handler.postDelayed(refreshGeoJsonRunnable, 1000);
}
while (index == 37);
}
});
}
 
private class RefreshGeoJsonRunnable implements Runnable {
@Override
public void run() {
layer.setFilter(eq((Expression.get("idx")), literal(index)));
index++;
if (index == 37) {
index = 0;
}
handler.postDelayed(this, 1000);
}
}
 
private void addRadarData(@NonNull Style loadedMapStyle) {
VectorSource vectorSource = new VectorSource(
ID_SOURCE,
SOURCE_URL
);
loadedMapStyle.addSource(vectorSource);
layer = loadedMapStyle.getLayerAs(ID_LAYER);
if (layer == null) {
layer = new FillLayer(ID_LAYER, ID_SOURCE);
layer.withSourceLayer("201806261518");
layer.setFilter(eq((get("idx")), literal(0)));
layer.setProperties(PropertyFactory.visibility(VISIBLE),
fillColor(interpolate(Expression.exponential(1f),
get("value"),
stop(8, Expression.rgb(20, 160, 240)),
stop(18, Expression.rgb(20, 190, 240)),
stop(36, Expression.rgb(20, 220, 240)),
stop(54, Expression.rgb(20, 250, 240)),
stop(72, Expression.rgb(20, 250, 160)),
stop(90, Expression.rgb(135, 250, 80)),
stop(108, Expression.rgb(250, 250, 0)),
stop(126, Expression.rgb(250, 180, 0)),
stop(144, Expression.rgb(250, 110, 0)),
stop(162, Expression.rgb(250, 40, 0)),
stop(180, Expression.rgb(180, 40, 40)),
stop(198, Expression.rgb(110, 40, 80)),
stop(216, Expression.rgb(80, 40, 110)),
stop(234, Expression.rgb(50, 40, 140)),
stop(252, Expression.rgb(20, 40, 170))
)
),
PropertyFactory.fillOpacity(0.7f));
loadedMapStyle.addLayer(layer);
}
}
 
@Override
protected void onStart() {
super.onStart();
mapView.onStart();
}
 
@Override
protected void onResume() {
super.onResume();
mapView.onResume();
}
 
@Override
protected void onPause() {
super.onPause();
mapView.onPause();
}
 
@Override
protected void onStop() {
super.onStop();
mapView.onStop();
}
 
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
 
@Override
protected void onDestroy() {
super.onDestroy();
mapView.onDestroy();
handler.removeCallbacks(refreshGeoJsonRunnable);
refreshGeoJsonRunnable = null;
handler = null;
}
 
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
}