Move Google Maps V2 with auto best zoom

We can build LatLngBounds object including certain points, and move GoogleMap to the bounds with auto estimated best zoom.

package com.example.androidmapsv2;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.LatLngBounds;
import com.google.android.gms.maps.model.MarkerOptions;

import android.os.Build;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.FragmentManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewTreeObserver.OnGlobalLayoutListener;
import android.widget.Toast;

public class MainActivity extends Activity {
 
 private static final LatLng Leicester_Square = new LatLng(51.510278, -0.130278);
 private static final LatLng Covent_Garden = new LatLng(51.51197, -0.1228);
 private static final LatLng Piccadilly_Circus = new LatLng(51.51, -0.134444);
 private static final LatLng Embankment = new LatLng(51.507, -0.122);
 private static final LatLng Charing_Cross = new LatLng(51.5073, -0.12755);
 
 final int RQS_GooglePlayServices = 1;
 MapFragment myMapFragment;
 GoogleMap myMap;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  
  FragmentManager myFragmentManager = getFragmentManager();
  MapFragment myMapFragment = 
    (MapFragment)myFragmentManager.findFragmentById(R.id.map);
  myMap = myMapFragment.getMap();
  myMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
  
  myMap.addMarker(new MarkerOptions().position(Leicester_Square).title("Leicester Square"));
  myMap.addMarker(new MarkerOptions().position(Covent_Garden).title("Covent Garden"));
  myMap.addMarker(new MarkerOptions().position(Piccadilly_Circus).title("Piccadilly Circus"));
  myMap.addMarker(new MarkerOptions().position(Embankment).title("Embankment"));
  myMap.addMarker(new MarkerOptions().position(Charing_Cross).title("Charing Cross"));
  
        final View mapView = getFragmentManager().findFragmentById(R.id.map).getView();
        if (mapView.getViewTreeObserver().isAlive()) {
            mapView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
                @SuppressLint("NewApi") // We check which build version we are using.
                @Override
                public void onGlobalLayout() {
                 LatLngBounds bounds = new LatLngBounds.Builder()
                 .include(Leicester_Square)
                 .include(Covent_Garden)
                 .include(Piccadilly_Circus)
                 .include(Embankment)
                 .include(Charing_Cross)
                 .build();
                 
                 if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
                  mapView.getViewTreeObserver().removeGlobalOnLayoutListener(this); 
                 } else {
                  mapView.getViewTreeObserver().removeOnGlobalLayoutListener(this); 
                 }
                 myMap.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds, 50));
                }});    
        }

 }

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

 @Override
 public boolean onOptionsItemSelected(MenuItem item) {
  
  switch (item.getItemId()) {
  case R.id.menu_legalnotices:
   String LicenseInfo = GooglePlayServicesUtil.getOpenSourceSoftwareLicenseInfo(
     getApplicationContext());
   AlertDialog.Builder LicenseDialog = new AlertDialog.Builder(MainActivity.this);
   LicenseDialog.setTitle("Legal Notices");
   LicenseDialog.setMessage(LicenseInfo);
   LicenseDialog.show();
   return true; 
  }
  return super.onOptionsItemSelected(item);
 }

 @Override
 protected void onResume() {
  super.onResume();
  
  int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(getApplicationContext());
  if (resultCode == ConnectionResult.SUCCESS){
   Toast.makeText(getApplicationContext(), 
     "isGooglePlayServicesAvailable SUCCESS", 
     Toast.LENGTH_LONG).show();   
  }else{
   GooglePlayServicesUtil.getErrorDialog(resultCode, this, RQS_GooglePlayServices); 
  }
 }

}

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The series:

A simple example using Google Maps Android API v2, step by step.