/*
* Copyright (C) 2012 The Android Open Source Project
*
* 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.example.mapdemo;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;
/**
* Demonstrates how to instantiate a SupportMapFragment programmatically and add a marker to it.
*/
public class ProgrammaticDemoActivity extends FragmentActivity {
private static final String MAP_FRAGMENT_TAG = "map";
private GoogleMap mMap;
private SupportMapFragment mMapFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// It isn't possible to set a fragment's id programmatically so we set a tag instead and
// search for it using that.
mMapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentByTag(MAP_FRAGMENT_TAG);
// We only create a fragment if it doesn't already exist.
if (mMapFragment == null) {
// To programmatically add the map, we first create a SupportMapFragment.
mMapFragment = SupportMapFragment.newInstance();
// Then we add it using a FragmentTransaction.
FragmentTransaction fragmentTransaction =
getSupportFragmentManager().beginTransaction();
fragmentTransaction.add(android.R.id.content, mMapFragment, MAP_FRAGMENT_TAG);
fragmentTransaction.commit();
}
// We can't be guaranteed that the map is available because Google Play services might
// not be available.
setUpMapIfNeeded();
}
@Override
protected void onResume() {
super.onResume();
// In case Google Play services has since become available.
setUpMapIfNeeded();
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = mMapFragment.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
private void setUpMap() {
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}
}