Create MapFragment and GoogleMap using Java code

Anonymous

20:17

In previous exercises, MapFragment and SupportMapFragment are defined in XML of layout file. We can create it using Java code, without XML.

package com.example.androidmapsv2;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;

import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class MainActivity extends Activity {
 
 final int RQS_GooglePlayServices = 1;
 private GoogleMap myMap;
 MapFragment myMapFragment;
 private static final String TAG_MYMAPFRAGMENT = "TAG_MyMapFragment";

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  //setContentView(R.layout.activity_main);

  FragmentManager myFragmentManager = getFragmentManager();
  myMapFragment = 
    (MapFragment)myFragmentManager.findFragmentByTag(TAG_MYMAPFRAGMENT);
  
  if(myMapFragment == null){
   myMapFragment = MapFragment.newInstance();
   FragmentTransaction fragmentTransaction = myFragmentManager.beginTransaction();
   fragmentTransaction.add(android.R.id.content, myMapFragment, TAG_MYMAPFRAGMENT);
   fragmentTransaction.commit();
  }

 }

 @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();
   
   if(myMap == null){
    myMap = myMapFragment.getMap();
    if(myMap != null){
     myMap.setMyLocationEnabled(true);
     myMap.setMapType(GoogleMap.MAP_TYPE_HYBRID);
    }else{
     Toast.makeText(getApplicationContext(), 
       "cannot getMap!", 
       Toast.LENGTH_LONG).show();
    }
   }
   
  }else{
   GooglePlayServicesUtil.getErrorDialog(resultCode, this, RQS_GooglePlayServices); 
  }
 }

}