How to use Android Google Maps(API Ver2) in older Android version such as 2.2.(Part 2/2)

1. Create new Android Application.

• Go to File>New>Project.
• Select Android>Android Application Project and click Next>.
• Enter applciation name.
• Enter package name. This should be the same package name you used when you created API key.
• Select API 8: Android 2.2 (Froyo) in Minimu Required SDK.
• Keep others as default and finish.

2. Load 'google-play-services_lib' to your project.(The same instructed in Part 1/2)

• select Project>properties and go to Android.
• In the Library box click 'Add...' button.
• select 'google-play-services_lib' on the popup and click 'ok' button. 

 

3. Create New Activity and Layout.

• Go to File>New>Others.
• Select Android>Android Activity and click Next to the end.
• Add google map fragment to your layout xml file.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="horizontal"

android:layout_width="match_parent"

android:layout_height="match_parent">

   <fragment

     android:id="@+id/gmap"

     android:layout_width="match_parent"

     android:layout_height="match_parent"

     class="com.google.android.gms.maps.SupportMapFragment"/>   

</LinearLayout>

 

4. Modify Actvity Class to handle google maps.

• You may find some useful codes to control gmap. 
• You can extends GMapActivity from FragmentActivty rather than ActionBarActivity.

package com.example.googlemaptest;

 

import java.io.IOException;

import java.util.List;
import java.util.Locale;

import android.location.Address;

import android.location.Geocoder;
import android.location.Location;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;

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.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;
 

public class GMapActivity extends ActionBarActivity {

private GoogleMap _gMap;
private int _mapType = GoogleMap.MAP_TYPE_NORMAL;
   @Override

   protected void onCreate(Bundle savedInstanceState) {

      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_gmap);
      Bundle extras = this.getIntent().getExtras();

      Location location = null;

      if (extras != null && extras.containsKey("GPSINFO")) {

           location = (Location)extras.get("GPSINFO");
      }
      FragmentManager fragmentManager = getSupportFragmentManager();
      SupportMapFragment mapFragment = (SupportMapFragment)

      fragmentManager.findFragmentById(R.id.gmap);

      _gMap = mapFragment.getMap();
      _gMap.getUiSettings().setCompassEnabled(true);
      _gMap.getUiSettings().setZoomControlsEnabled(true);
      _gMap.getUiSettings().setMyLocationButtonEnabled(true);
      _gMap.getUiSettings().setAllGesturesEnabled(true);
      _gMap.getUiSettings().setMyLocationButtonEnabled(true);
      _gMap.getUiSettings().setRotateGesturesEnabled(true);
      _gMap.getUiSettings().setTiltGesturesEnabled(true);
      _gMap.getUiSettings().setZoomGesturesEnabled(true);
      _gMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);

      LatLng sfLatLng = null;

      if(location != null){
      double lat = location.getLatitude();
      double lng = location.getLongitude();
      sfLatLng = new LatLng(lat, lng);
      Geocoder geocoder = new Geocoder(this, Locale.getDefault());
      List<Address> addresses = null;
      try {

      addresses = geocoder.getFromLocation(lat, lng, 1);

      } catch (IOException e) {

      // TODO Auto-generated catch block
      e.printStackTrace();
      }

      if(addresses != null){

      _gMap.addMarker(new MarkerOptions()
      .position(sfLatLng)

      .title("Position in " + addresses.get(0).getAddressLine(1) + " " + addresses.get(0).getAddressLine(2))

      .snippet(addresses.get(0).getAddressLine(0))

      .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));

      }else{
      _gMap.addMarker(new MarkerOptions()
      .position(sfLatLng)

      .title("Position")

      .snippet("No address is available")
      .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))); 
      }

      _gMap.animateCamera(CameraUpdateFactory.newLatLngZoom(sfLatLng, 13));

      }else{
      }
   }
5. Change Manifast file.

• add uses-feature.
• add premission.
• add meta-data for API key.
• add meta-data for gms version.

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

     package="com.example.googlemaptest"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="19" />

 

<uses-feature

android:glEsVersion="0x00020000"

android:required="true"/>

 

<uses-permission android:name="android.permission.INTERNET" />

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

 

<application

        ...  >

<meta-data

android:name="com.google.android.maps.v2.API_KEY"

android:value="AIASDFASlSG6qfsadfdfZtZVnuZTJyfsSDFSD2" />

<meta-data android:name="com.google.android.gms.version"

android:value="@integer/google_play_services_version" />

 

6. Call GMapActivity

• You can add this code  to call GMapActvity. 

Location location = new Location("You are here");

location.setLatitude(latitude);

location.setLongitude(longitude);

Intent intent = new Intent(getBaseContext(), GMapActivity.class);

intent.putExtra("GPSINFO", location);

startActivity(intent);  

• In some older verion android phone google play service should be updated.
• In the case of content filtering message, go to Menu>Settings in Google Play Store and unlock Content Filtering in User Controls.