Check google play service is ok

Check google play service is ok

public boolean servicesOK() {
		int isAvailable = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
		
		if (isAvailable == ConnectionResult.SUCCESS) {
			return true;
		}
		else if (GooglePlayServicesUtil.isUserRecoverableError(isAvailable)) {
			Dialog dialog = GooglePlayServicesUtil.getErrorDialog(isAvailable, this, GPS_ERRORDIALOG_REQUEST);
			dialog.show();
		}
		else {
			Toast.makeText(this, "Can't connect to Google Play services", Toast.LENGTH_SHORT).show();
		}
		return false;
	}

Geocode code

layout


java.

public void geoLocate(View v) throws IOException {
		hideSoftKeyboard(v);

		EditText et = (EditText) findViewById(R.id.editText1);
		String location = et.getText().toString();

		Geocoder gc = new Geocoder(this);
		List<Address> list = gc.getFromLocationName(location, 1);
		Address add = list.get(0);
		String locality = add.getLocality();
		Toast.makeText(this, locality, Toast.LENGTH_LONG).show();

		double lat = add.getLatitude();
		double lng = add.getLongitude();

		gotoLocation(lat, lng, DEFAULTZOOM);

	}

geocode java full

package com.example.gmapsapp;

import java.io.IOException;
import java.util.List;

import android.app.Dialog;
import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import android.widget.Toast;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.CameraUpdate;
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.LatLng;

public class MainActivity extends FragmentActivity {

	private static final int GPS_ERRORDIALOG_REQUEST = 9001;
	GoogleMap mMap;

	@SuppressWarnings("unused")
	private static final double SEATTLE_LAT = 47.60621,
	SEATTLE_LNG =-122.33207, 
	SYDNEY_LAT = -33.867487,
	SYDNEY_LNG = 151.20699, 
	NEWYORK_LAT = 40.714353, 
	NEWYORK_LNG = -74.005973;
	private static final float DEFAULTZOOM = 15;
	private static final String LOGTAG = "Maps";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		if (servicesOK()) {
			setContentView(R.layout.activity_map);

			if (initMap()) {
				Toast.makeText(this, "Ready to map!", Toast.LENGTH_SHORT).show();
			}
			else {
				Toast.makeText(this, "Map not available!", Toast.LENGTH_SHORT).show();
			}
		}
		else {
			setContentView(R.layout.activity_main);
		}

	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	public boolean servicesOK() {
		int isAvailable = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);

		if (isAvailable == ConnectionResult.SUCCESS) {
			return true;
		}
		else if (GooglePlayServicesUtil.isUserRecoverableError(isAvailable)) {
			Dialog dialog = GooglePlayServicesUtil.getErrorDialog(isAvailable, this, GPS_ERRORDIALOG_REQUEST);
			dialog.show();
		}
		else {
			Toast.makeText(this, "Can't connect to Google Play services", Toast.LENGTH_SHORT).show();
		}
		return false;
	}

	private boolean initMap() {
		if (mMap == null) {
			SupportMapFragment mapFrag =
					(SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
			mMap = mapFrag.getMap();
		}
		return (mMap != null);
	}

	private void gotoLocation(double lat, double lng) {
		LatLng ll = new LatLng(lat, lng);
		CameraUpdate update = CameraUpdateFactory.newLatLng(ll);
		mMap.moveCamera(update);
	}

	private void gotoLocation(double lat, double lng,
			float zoom) {
		LatLng ll = new LatLng(lat, lng);
		CameraUpdate update = CameraUpdateFactory.newLatLngZoom(ll, zoom);
		mMap.moveCamera(update);
	}

	public void geoLocate(View v) throws IOException {
		hideSoftKeyboard(v);

		EditText et = (EditText) findViewById(R.id.editText1);
		String location = et.getText().toString();

		Geocoder gc = new Geocoder(this);
		List<Address> list = gc.getFromLocationName(location, 1);
		Address add = list.get(0);
		String locality = add.getLocality();
		Toast.makeText(this, locality, Toast.LENGTH_LONG).show();

		double lat = add.getLatitude();
		double lng = add.getLongitude();

		gotoLocation(lat, lng, DEFAULTZOOM);

	}

	private void hideSoftKeyboard(View v) {
		InputMethodManager imm = (InputMethodManager)getSystemService(INPUT_METHOD_SERVICE);
		imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {

		switch (item.getItemId()) {
		case R.id.mapTypeNone:
			mMap.setMapType(GoogleMap.MAP_TYPE_NONE);
			break;
		case R.id.mapTypeNormal:
			mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
			break;
		case R.id.mapTypeSatellite:
			mMap.setMapType(GoogleMap.MAP_TYPE_SATELLITE);
			break;
		case R.id.mapTypeTerrain:
			mMap.setMapType(GoogleMap.MAP_TYPE_TERRAIN);
			break;
		case R.id.mapTypeHybrid:
			mMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
			break;

		default:
			break;
		}

		return super.onOptionsItemSelected(item);
	}

}

geocode layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal" >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="left|center_vertical"
            android:text="Location:"
            android:textSize="20sp" />

        <EditText
            android:id="@+id/editText1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center|center_vertical"
            android:ems="10" >

            <requestFocus />
        </EditText>

        <Button
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right|center_vertical"
            android:text="Go" 
            android:onClick="geoLocate"/>
    </LinearLayout>

    <fragment
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="fill_parent" />

</LinearLayout>

If map is a fragment set the reference from support map fragment

private boolean initMap() {
		if (mMap == null) {
			SupportMapFragment mapFrag =
					(SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);
			mMap = mapFrag.getMap();
		}
		return (mMap != null);
	}
	
	In java
	
	if (servicesOK()) {
			setContentView(R.layout.activity_map);
		
			if (initMap()) {  //check for instance and use
				Toast.makeText(this, "Ready to map!", Toast.LENGTH_SHORT).show();
			}
			else {
				Toast.makeText(this, "Map not available!", Toast.LENGTH_SHORT).show();
			}
		}
		else {
			setContentView(R.layout.activity_main);
		}
		
		In layout activity_map.xml
		
		
		<?xml version="1.0" encoding="utf-8"?>
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:map="http://schemas.android.com/apk/res-auto"
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

If using mapview override below methods

onDestroy()
onPause()
onResume()
onSaveInstanceState()
onLowMemory()

In Layout


<com.google.android.gms.maps.MapView
 android:id="@+id/map"
 android:layout_width="match_parent"
 android:layout_height="matcch_parent" />
 
 
 In Java
 
 get reference to the mapview using MapView object.
 
 mapview = findviewById
 mapview.onCreate(savedInstanceState);
 
 
 
 

Main.xml

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

    <item
        android:id="@+id/mapTypeNormal"
        android:title="Normal"/>
    <item
        android:id="@+id/mapTypeSatellite"
        android:title="Satellite"/>
    <item
        android:id="@+id/mapTypeTerrain"
        android:title="Terrain"/>
    <item
        android:id="@+id/mapTypeHybrid"
        android:title="Hybrid"/>
    <item
        android:id="@+id/mapTypeNone"
        android:title="None"/>

</menu>

MapStateManager.java

package com.example.gmapsapp;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.model.CameraPosition;
import com.google.android.gms.maps.model.LatLng;

import android.content.Context;
import android.content.SharedPreferences;

public class MapStateManager {
	private static final String LONGITUDE = "longitude";
	private static final String LATITUDE = "latitude";
	private static final String ZOOM = "zoom";
	private static final String BEARING = "bearing";
	private static final String TILT = "tilt";
	private static final String MAPTYPE = "MAPTYPE";

	private static final String PREFS_NAME ="mapCameraState";

	private SharedPreferences mapStatePrefs;

	public MapStateManager(Context context) {
		mapStatePrefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
	}
	
	public void saveMapState(GoogleMap map) {
		SharedPreferences.Editor editor = mapStatePrefs.edit();
		CameraPosition position = map.getCameraPosition();
		
		editor.putFloat(LATITUDE, (float) position.target.latitude);
		editor.putFloat(LONGITUDE, (float) position.target.longitude);
		editor.putFloat(ZOOM, position.zoom);
		editor.putFloat(TILT, position.tilt);
		editor.putFloat(BEARING, position.bearing);
		editor.putInt(MAPTYPE, map.getMapType());
		
		editor.commit();
	}
	
	public CameraPosition getSavedCameraPosition() {
		double latitude = mapStatePrefs.getFloat(LATITUDE, 0);
		if (latitude == 0) {
			return null;
		}
		double longitude = mapStatePrefs.getFloat(LONGITUDE, 0);
		LatLng target = new LatLng(latitude, longitude);
		
		float zoom = mapStatePrefs.getFloat(ZOOM, 0);
		float bearing = mapStatePrefs.getFloat(BEARING, 0);
		float tilt = mapStatePrefs.getFloat(TILT, 0);
		
		CameraPosition position = new CameraPosition(target, zoom, tilt, bearing);
		return position;
	}
	
//	This is part of the answer to the code challenge
	public int getSavedMapType() {
		return mapStatePrefs.getInt(MAPTYPE, GoogleMap.MAP_TYPE_NORMAL);
	}

}


in MainActivity.java
@Override
	protected void onStop() {
		super.onStop();
		MapStateManager mgr = new MapStateManager(this);
		mgr.saveMapState(mMap);
	}

	@Override
	protected void onResume() {
		super.onResume();
		MapStateManager mgr = new MapStateManager(this);
		CameraPosition position = mgr.getSavedCameraPosition();
		if (position != null) {
			CameraUpdate update = CameraUpdateFactory.newCameraPosition(position);
			mMap.moveCamera(update);
			//			This is part of the answer to the code challenge
			mMap.setMapType(mgr.getSavedMapType());
		}
	}

Programatically set lat and long

private static final double SEATTLE_LAT = 47.60621,
	SEATTLE_LNG =-122.33207, 
	SYDNEY_LAT = -33.867487,
	SYDNEY_LNG = 151.20699, 
	NEWYORK_LAT = 40.714353, 
	NEWYORK_LNG = -74.005973;
	private static final float DEFAULTZOOM = 15;
	
	Use below function to pass the values.
	private void gotoLocation(double lat, double lng,
			float zoom) {
		LatLng ll = new LatLng(lat, lng);
		CameraUpdate update = CameraUpdateFactory.newLatLngZoom(ll, zoom);
		mMap.moveCamera(update);
	}

To display configure the code of map

if (servicesOK()) {
			Toast.makeText(this, "Ready to map!", Toast.LENGTH_SHORT).show();
			setContentView(R.layout.activity_map);
		}
		else {
			setContentView(R.layout.activity_main);
		}

To show map use fragmentActivity super class and below layouot

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:map="http://schemas.android.com/apk/res-auto"
    android:id="@+id/map"
    android:name="com.google.android.gms.maps.SupportMapFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />
    
    or 
<fragment
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="fill_parent" />