Teachers

Basic Android application with Google maps v2 API

In this post I will illustrate how to make settings for Google maps v2 API in Android Manifest.

1. Create an Android project.

• Use API level 11 or above for minimum required SDK.
• Give the same package name which you gave when you are obtaining the API key from Google.
• Keep other settings as default 

 2. We need to make some changes Android Manifest.xml

• Open the Manifest.xml and add following permissions as a child of the <manifest> element

     

• Google Maps Android API uses OpenGL ES version 2 to render the map there for we need to define the feature in Manifest file. Add following lines as a child of the <manifest> element.

• Add the API key by adding following lines as a child of the <application> element, inserting it just before the closing tag </application> 

• Change the android:value="AIzaSyARrx5gAxtNJCHUBvwyIz4uZEFAm3R60kI" with the API key given by Google
• Finally your Manifest.xml should be like this.

3. To use Google maps in our Android project we have to add Google play services lib project.

• First check whether Google Play services are installed.
• To do that open Android SDK manager expand the Extras.
• Check the status of  Google Play Services is installed if it is not installed you have to install it first.

• Then to import the Google play services lib project in to the work space, in Eclipse select
  File >> Import >> Android >> Existing Android Code Into Workspace

• Click Next and select the Root Directory, browse to the google-play-services_lib. In my case it is in C:Androidadt-bundle-windows-x86-20130219sdkextrasgooglegoogle_play_serviceslibprojectgoogle-play-services_lib
• Most of the time you can find it under the sdkextrasgooglegoogle_play_serviceslibproject directory.  
• Select the Copy project into workspace and click Finish.

4. The next step is to add the lib project into the our newly created projects references.

• Right click on the project select Properties >> Android and then click on Add button under Library

•  In the project selection window select google-play-services_lib project and then click  OK

•  Then under the libraries there should be the google-play-services_lib project with a green tick.

 5. As the final step we have to add the fragment for the map in to xml layout.

• Open the res >> layout and activity xml lay out file and copy following code to create the fragment.

• For this simplest example dont need to do any change for the Activities java file, keep it as it is.

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

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

Now you can run the project. If you are running this on Android emulator you have to do certain installations on AVD I will describe that in my next post.