LocationFragmentActivity.java

package org.flisolsaocarlos.flisolapp.ui;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.UiSettings;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

import org.flisolsaocarlos.flisolapp.R;

public class LocationFragmentActivity extends FragmentActivity {

    static final LatLng FLISOLSAOCARLOS = new LatLng(-22.024825, -47.891287);
    private GoogleMap mMap;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.location_layout);
        setUpMapIfNeeded();
    }

    @Override
    protected void onResume() {
        super.onResume();
        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 = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map))
                    .getMap();
            // Check if we were successful in obtaining the map.
            if (mMap != null) {
                setUpMap();
            }
        }
    }

    private void setUpMap() {
        final UiSettings uiSettings = mMap.getUiSettings();
        uiSettings.setZoomControlsEnabled(true);
        uiSettings.setCompassEnabled(true);
        uiSettings.setMyLocationButtonEnabled(true);

        Marker flisolMarker = mMap.addMarker(new MarkerOptions()
                .title(getResources().getString(R.string.map_marker_title))
                .snippet(getResources().getString(R.string.map_marker_snippet))
                .position(FLISOLSAOCARLOS)
                .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE))
                .alpha(0.8f));

        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(FLISOLSAOCARLOS, 10));
        mMap.animateCamera(CameraUpdateFactory.zoomTo(14), 1500, null);
        flisolMarker.showInfoWindow();
    }

    @Override
    public void onBackPressed() {
        this.finish();
    }

    @Override
    public void finish() {
        super.finish();
        overridePendingTransition(R.anim.end_in, R.anim.end_out);
    }
}