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package com.mapbox.mapboxsdk.testapp.activity.style;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.annotation.RawRes;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Toast;
import com.mapbox.mapboxsdk.maps.MapView;
import com.mapbox.mapboxsdk.maps.MapboxMap;
import com.mapbox.mapboxsdk.maps.OnMapReadyCallback;
import com.mapbox.mapboxsdk.testapp.R;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
import timber.log.Timber;
/**
* Test activity showcasing how to use a file:// resource for the style.json
*/
public class StyleFileActivity extends AppCompatActivity {
private MapboxMap mapboxMap;
private MapView mapView;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_style_file);
mapView = (MapView) findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
mapView.getMapAsync(new OnMapReadyCallback() {
@Override
public void onMapReady(@NonNull final MapboxMap map) {
mapboxMap = map;
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setColorFilter(ContextCompat.getColor(StyleFileActivity.this, R.color.primary));
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Timber.i("Loading style file");
new CreateStyleFileTask().execute();
}
});
}
});
}
/**
* Task to write a style file to local disk and load it in the map view
*/
private class CreateStyleFileTask extends AsyncTask<Void, Integer, Long> {
private File cacheStyleFile;
@Override
protected Long doInBackground(Void... params) {
try {
cacheStyleFile = File.createTempFile("my-", ".style.json");
cacheStyleFile.createNewFile();
Timber.i("Writing style file to: " + cacheStyleFile.getAbsolutePath());
writeToFile(cacheStyleFile, readRawResource(R.raw.local_style));
} catch (Exception exception) {
Toast.makeText(StyleFileActivity.this, "Could not create style file in cache dir", Toast.LENGTH_SHORT).show();
}
return 1L;
}
protected void onPostExecute(Long result) {
// Actual file:// usage
mapboxMap.setStyleUrl("file://" + cacheStyleFile.getAbsolutePath());
}
private String readRawResource(@RawRes int rawResource) throws IOException {
InputStream is = getResources().openRawResource(rawResource);
Writer writer = new StringWriter();
char[] buffer = new char[1024];
try {
Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
int numRead;
while ((numRead = reader.read(buffer)) != -1) {
writer.write(buffer, 0, numRead);
}
} finally {
is.close();
}
return writer.toString();
}
private void writeToFile(File file, String contents) throws IOException {
BufferedWriter writer = null;
try {
writer = new BufferedWriter(new FileWriter(file));
writer.write(contents);
} finally {
if (writer != null) {
writer.close();
}
}
}
}
@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 onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
mapView.onSaveInstanceState(outState);
}
@Override
public void onLowMemory() {
super.onLowMemory();
mapView.onLowMemory();
}
@Override
public void onDestroy() {
super.onDestroy();
mapView.onDestroy();
}
}
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