Androidプログラミング入門-98日目
5813 ワード
LocatrFragment.java
import android.Manifest;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.location.Location;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.support.v4.content.ContextCompat;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationListener;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import java.io.IOException;
import java.util.List;
public class LocatrFragment extends Fragment {
private static final String TAG = "LocatrFragment";
private static final String[] LOCATION_PERMISSIONS = new String[]{
Manifest.permission.ACCESS_FINE_LOCATION,
Manifest.permission.ACCESS_COARSE_LOCATION,
};
private static final int REQUEST_LOCATION_PERMISSIONS = 0;
private ImageView mImageView;
private GoogleApiClient mClient;
public static LocatrFragment newInstance() {
return new LocatrFragment();
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
mClient = new GoogleApiClient.Builder(getActivity()).addApi(LocationServices.API)
.addConnectionCallbacks(new GoogleApiClient.ConnectionCallbacks() {
@Override
public void onConnected(@Nullable Bundle bundle) {
getActivity().invalidateOptionsMenu();
}
@Override
public void onConnectionSuspended(int i) {
}
})
.build();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.fragment_locatr, container, false);
mImageView = (ImageView) v.findViewById(R.id.image);
return v;
}
@Override
public void onStart() {
super.onStart();
getActivity().invalidateOptionsMenu();
mClient.connect();
}
@Override
public void onStop() {
super.onStop();
mClient.disconnect();
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.fragment_locatr, menu);
MenuItem searchItem = menu.findItem(R.id.action_locate);
searchItem.setEnabled(mClient.isConnected());
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_locate:
if (hasLocationPermission()) {
findImage();
} else {
requestPermissions(LOCATION_PERMISSIONS,
REQUEST_LOCATION_PERMISSIONS);
}
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions,
int[] grantResults) {
switch (requestCode) {
case REQUEST_LOCATION_PERMISSIONS:
if (hasLocationPermission()) {
findImage();
}
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
private void findImage() {
LocationRequest request = LocationRequest.create();
request.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
request.setNumUpdates(1);
request.setInterval(0);
LocationServices.FusedLocationApi
.requestLocationUpdates(mClient, request, new LocationListener() {
@Override
public void onLocationChanged(Location location) {
Log.i(TAG, "Got a fix: " + location);
new SearchTask().execute(location);
}
});
}
private boolean hasLocationPermission() {
int result = ContextCompat
.checkSelfPermission(getActivity(), LOCATION_PERMISSIONS[0]);
return result == PackageManager.PERMISSION_GRANTED;
}
private class SearchTask extends AsyncTask {
private GalleryItem mGalleryItem;
private Bitmap mBitmap;
@Override
protected Void doInBackground(Location... params) {
FlickrFetchr fetchr = new FlickrFetchr();
List items = fetchr.searchPhotos(params[0]);
if (items.size() == 0) {
return null;
}
mGalleryItem = items.get(0);
try {
byte[] bytes = fetchr.getUrlBytes(mGalleryItem.getUrl());
mBitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
} catch (IOException ioe) {
Log.i(TAG, "Unable to decode bitmap", ioe);
}
return null;
}
@Override
protected void onPostExecute(Void result) {
mImageView.setImageBitmap(mBitmap);
}
}
}