com.squareup.otto.sample.LocationMapFragment Maven / Gradle / Ivy
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/*
* Copyright (C) 2012 Square, Inc.
*
* 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.squareup.otto.sample;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import com.squareup.otto.Subscribe;
import java.net.URL;
import static android.widget.ImageView.ScaleType.CENTER_INSIDE;
/** Display a map centered on the last known location. */
public class LocationMapFragment extends Fragment {
private static final String URL =
"https://maps.googleapis.com/maps/api/staticmap?sensor=false&size=400x400&zoom=13¢er=%s,%s";
private static DownloadTask downloadTask;
private ImageView imageView;
@Override public void onResume() {
super.onResume();
BusProvider.getInstance().register(this);
}
@Override public void onPause() {
super.onPause();
BusProvider.getInstance().unregister(this);
// Stop existing download, if it exists.
if (downloadTask != null) {
downloadTask.cancel(true);
downloadTask = null;
}
}
@Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
imageView = new ImageView(getActivity());
imageView.setScaleType(CENTER_INSIDE);
return imageView;
}
@Subscribe public void onLocationChanged(LocationChangedEvent event) {
// Stop existing download, if it exists.
if (downloadTask != null) {
downloadTask.cancel(true);
}
// Trigger a background download of an image for the new location.
downloadTask = new DownloadTask();
downloadTask.execute(String.format(URL, event.lat, event.lon));
}
@Subscribe public void onImageAvailable(ImageAvailableEvent event) {
if (imageView != null) {
imageView.setImageDrawable(event.image);
}
}
private static class ImageAvailableEvent {
public final Drawable image;
ImageAvailableEvent(Drawable image) {
this.image = image;
}
}
private static class DownloadTask extends AsyncTask {
@Override protected Drawable doInBackground(String... params) {
try {
return BitmapDrawable.createFromStream(new URL(params[0]).openStream(), "bitmap.jpg");
} catch (Exception e) {
Log.e("LocationMapFragment", "Unable to download image.", e);
return null;
}
}
@Override protected void onPostExecute(Drawable drawable) {
if (!isCancelled() && drawable != null) {
BusProvider.getInstance().post(new ImageAvailableEvent(drawable));
}
}
}
}