スナップショットイメージの共有

package com.mapbox.mapboxandroiddemo.examples.snapshot;
 
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.StrictMode;
import android.view.View;
import android.widget.Toast;
 
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.mapbox.mapboxandroiddemo.R;
import com.mapbox.mapboxsdk.Mapbox;
import com.mapbox.mapboxsdk.geometry.LatLngBounds;
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.snapshotter.MapSnapshot;
import com.mapbox.mapboxsdk.snapshotter.MapSnapshotter;
 
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
 
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
 
public class SnapshotShareActivity extends AppCompatActivity {
 
private MapView mapView;
private MapboxMap mapboxMap;
private MapSnapshotter mapSnapshotter;
private FloatingActionButton cameraFab;
private boolean hasStartedSnapshotGeneration;
 
@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 access token is configured.
setContentView(R.layout.activity_snapshot_share);
 
cameraFab = findViewById(R.id.camera_share_snapshot_image_fab);
cameraFab.setImageResource(R.drawable.ic_camera);
 
hasStartedSnapshotGeneration = false;
 
mapView = findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
 
// Set a callback for when MapboxMap is ready to be used
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(@NonNull final MapboxMap mapboxMap) {
SnapshotShareActivity.this.mapboxMap = mapboxMap;
mapboxMap.setStyle(Style.SATELLITE_STREETS, new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
// When user clicks the map, start the snapshotting process with the given parameters
cameraFab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (!hasStartedSnapshotGeneration) {
hasStartedSnapshotGeneration = true;
Toast.makeText(SnapshotShareActivity.this, R.string.loading_snapshot_image, Toast.LENGTH_LONG).show();
startSnapShot(
mapboxMap.getProjection().getVisibleRegion().latLngBounds,
mapView.getMeasuredHeight(),
mapView.getMeasuredWidth());
}
}
});
}
});
 
// To account for new security measures regarding file management that were released with Android Nougat.
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
}
});
}
 
/**
* Creates bitmap from given parameters, and creates a notification with that bitmap
*
* @param latLngBounds of map
* @param height       of map
* @param width        of map
*/
private void startSnapShot(LatLngBounds latLngBounds, int height, int width) {
mapboxMap.getStyle(new Style.OnStyleLoaded() {
@Override
public void onStyleLoaded(@NonNull Style style) {
if (mapSnapshotter == null) {
// Initialize snapshotter with map dimensions and given bounds
MapSnapshotter.Options options =
new MapSnapshotter.Options(width, height)
.withRegion(latLngBounds)
.withCameraPosition(mapboxMap.getCameraPosition())
.withStyle(style.getUri());
 
mapSnapshotter = new MapSnapshotter(SnapshotShareActivity.this, options);
} else {
// Reuse pre-existing MapSnapshotter instance
mapSnapshotter.setSize(width, height);
mapSnapshotter.setRegion(latLngBounds);
mapSnapshotter.setCameraPosition(mapboxMap.getCameraPosition());
}
 
mapSnapshotter.start(new MapSnapshotter.SnapshotReadyCallback() {
@Override
public void onSnapshotReady(MapSnapshot snapshot) {
 
Bitmap bitmapOfMapSnapshotImage = snapshot.getBitmap();
 
Uri bmpUri = getLocalBitmapUri(bitmapOfMapSnapshotImage);
 
Intent shareIntent = new Intent();
shareIntent.putExtra(Intent.EXTRA_STREAM, bmpUri);
shareIntent.setType("image/png");
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
startActivity(Intent.createChooser(shareIntent, "Share map image"));
 
hasStartedSnapshotGeneration = false;
}
});
}
});
}
 
private Uri getLocalBitmapUri(Bitmap bmp) {
Uri bmpUri = null;
File file = new File(getExternalFilesDir(Environment.DIRECTORY_PICTURES),
"share_image_" + System.currentTimeMillis() + ".png");
FileOutputStream out = null;
try {
out = new FileOutputStream(file);
bmp.compress(Bitmap.CompressFormat.PNG, 90, out);
try {
out.close();
} catch (IOException exception) {
exception.printStackTrace();
}
bmpUri = Uri.fromFile(file);
} catch (FileNotFoundException exception) {
exception.printStackTrace();
}
return bmpUri;
}
 
@Override
public void onResume() {
super.onResume();
mapView.onResume();
}
 
@Override
protected void onStart() {
super.onStart();
mapView.onStart();
}
 
@Override
protected void onStop() {
super.onStop();
mapView.onStop();
}
 
@Override
public void onPause() {
super.onPause();
mapView.onPause();
// Make sure to stop the snapshotter on pause if it exists
if (mapSnapshotter != null) {
mapSnapshotter.cancel();
}
}
 
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
 
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
 
@Override
protected void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
}