Java tutorial
/** * Copyright 2010-present Facebook. * * 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.thesunsoft.bevy; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.location.Criteria; import android.location.Location; import android.location.LocationListener; import android.location.LocationManager; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.os.Looper; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.util.Log; import android.widget.Toast; import com.facebook.FacebookException; import com.thesunsoft.bevy.R; import com.thesunsoft.bevy.helpers.BavyApplication; import com.facebook.widget.FriendPickerFragment; import com.facebook.widget.PickerFragment; import com.facebook.widget.PlacePickerFragment; /** * The PickerActivity enhances the Friend or Place Picker by adding a title * and a Done button. The selection results are saved in the ScrumptiousApplication * instance. */ public class PickerActivity extends FragmentActivity { private String TAG = "PickerActivity"; public static final Uri FRIEND_PICKER = Uri.parse("picker://friend"); public static final Uri PLACE_PICKER = Uri.parse("picker://place"); private static final int SEARCH_RADIUS_METERS = 1000; private static final int SEARCH_RESULT_LIMIT = 50; private static final String SEARCH_TEXT = "Restaurant"; private static final int LOCATION_CHANGE_THRESHOLD = 50; // meters private static final Location SAN_FRANCISCO_LOCATION = new Location("") { { setLatitude(37.7750); setLongitude(-122.4183); } }; private FriendPickerFragment friendPickerFragment; private PlacePickerFragment placePickerFragment; private LocationListener locationListener; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_pickers); Bundle args = getIntent().getExtras(); if (args != null) Log.i(TAG, "args->" + args.toString()); FragmentManager manager = getSupportFragmentManager(); Fragment fragmentToShow = null; Uri intentUri = getIntent().getData(); if (intentUri != null) Log.i(TAG, "intentUri->" + intentUri.toString()); if (FRIEND_PICKER.equals(intentUri)) { if (savedInstanceState == null) { friendPickerFragment = new FriendPickerFragment(args); } else { friendPickerFragment = (FriendPickerFragment) manager.findFragmentById(R.id.picker_fragment); ; } friendPickerFragment.setOnErrorListener(new PickerFragment.OnErrorListener() { @Override public void onError(PickerFragment<?> fragment, FacebookException error) { PickerActivity.this.onError(error); } }); friendPickerFragment.setOnDoneButtonClickedListener(new PickerFragment.OnDoneButtonClickedListener() { @Override public void onDoneButtonClicked(PickerFragment<?> fragment) { finishActivity(); } }); fragmentToShow = friendPickerFragment; } else if (PLACE_PICKER.equals(intentUri)) { if (savedInstanceState == null) { placePickerFragment = new PlacePickerFragment(args); } else { placePickerFragment = (PlacePickerFragment) manager.findFragmentById(R.id.picker_fragment); } placePickerFragment.setOnSelectionChangedListener(new PickerFragment.OnSelectionChangedListener() { @Override public void onSelectionChanged(PickerFragment<?> fragment) { finishActivity(); // call finish since you can only pick one place } }); placePickerFragment.setOnErrorListener(new PickerFragment.OnErrorListener() { @Override public void onError(PickerFragment<?> fragment, FacebookException error) { PickerActivity.this.onError(error); } }); placePickerFragment.setOnDoneButtonClickedListener(new PickerFragment.OnDoneButtonClickedListener() { @Override public void onDoneButtonClicked(PickerFragment<?> fragment) { finishActivity(); } }); fragmentToShow = placePickerFragment; } else { // Nothing to do, finish setResult(RESULT_CANCELED); finish(); return; } manager.beginTransaction().replace(R.id.picker_fragment, fragmentToShow).commit(); } @Override protected void onStart() { super.onStart(); if (FRIEND_PICKER.equals(getIntent().getData())) { try { friendPickerFragment.loadData(false); } catch (Exception ex) { onError(ex); } } else if (PLACE_PICKER.equals(getIntent().getData())) { try { Location location = null; Criteria criteria = new Criteria(); LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); String bestProvider = locationManager.getBestProvider(criteria, false); if (bestProvider != null) { location = locationManager.getLastKnownLocation(bestProvider); if (locationManager.isProviderEnabled(bestProvider) && locationListener == null) { locationListener = new LocationListener() { @Override public void onLocationChanged(Location location) { float distance = location.distanceTo(placePickerFragment.getLocation()); if (distance >= LOCATION_CHANGE_THRESHOLD) { placePickerFragment.setLocation(location); placePickerFragment.loadData(true); } } @Override public void onStatusChanged(String s, int i, Bundle bundle) { } @Override public void onProviderEnabled(String s) { } @Override public void onProviderDisabled(String s) { } }; locationManager.requestLocationUpdates(bestProvider, 1, LOCATION_CHANGE_THRESHOLD, locationListener, Looper.getMainLooper()); } } if (location == null) { String model = Build.MODEL; if (model.equals("sdk") || model.equals("google_sdk") || model.contains("x86")) { // this may be the emulator, pretend we're in an exotic place location = SAN_FRANCISCO_LOCATION; } } if (location != null) { placePickerFragment.setLocation(location); placePickerFragment.setRadiusInMeters(SEARCH_RADIUS_METERS); placePickerFragment.setSearchText(SEARCH_TEXT); placePickerFragment.setResultsLimit(SEARCH_RESULT_LIMIT); placePickerFragment.loadData(false); } else { onError(getResources().getString(R.string.no_location_error), true); } } catch (Exception ex) { onError(ex); } } } @Override protected void onStop() { super.onStop(); if (locationListener != null) { LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); locationManager.removeUpdates(locationListener); locationListener = null; } } private void onError(Exception error) { String text = getString(R.string.exception, error.getMessage()); Toast toast = Toast.makeText(this, text, Toast.LENGTH_SHORT); toast.show(); } private void onError(String error, final boolean finishActivity) { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle(R.string.error_dialog_title).setMessage(error) .setPositiveButton(R.string.error_dialog_button_text, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { if (finishActivity) { finishActivity(); } } }); builder.show(); } private void finishActivity() { BavyApplication app = (BavyApplication) getApplication(); if (FRIEND_PICKER.equals(getIntent().getData())) { if (friendPickerFragment != null) { app.setSelectedUsers(friendPickerFragment.getSelection()); } } else if (PLACE_PICKER.equals(getIntent().getData())) { if (placePickerFragment != null) { app.setSelectedPlace(placePickerFragment.getSelection()); } } setResult(RESULT_OK, null); finish(); } }