Google Map in Android Application Example



In this sample application we wills see how to display a MapView in an android application. Of course we are going to use Google Map API library for that.

So let us start:

1.Create a new project File ->New -> Project ->Android ->Android Application Project. While creating the new project, name the application and project name as MapViewApplication , package name as you like, set the Build SDK to Google APIs (Google Inc.) (API8) and the Build Target to API8:Android 2.2(Froyo) -If you do not have these AVDs or Platforms please use SDK Manager or AVD Manager to download and install them.

2. Let the Activity name be MainActivity(MainActivity.java) and layout name be activity_main(activity_main.xml).

3. Now let us design the layout for our Activity .Note that while including the MapView tag in xml it is necessary to mention the full library path(com.google.android.maps.MapView) since it is not android defined and belongs to google. Also note that the 'android:apikey' attibute should have a valid key which should be obtained by registering a Google Map API Key Refer (How to obtain Google Map API Key for Android) to know how to obtain a google map API key

activity_main.xml
<RelativeLayout 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" >

    <com.google.android.maps.MapView
        android:id="@+id/mapview"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:apiKey="Your API Key here"
        android:clickable="true" />

</RelativeLayout>
4.Now let us use this layout in the MainActivity . This activity will extend MapActivity and must implement isRouteDisplayed() method .Press Ctrl+Shift+O for missing imports after typing the code.

MapActivity
public class MainActivity extends MapActivity {

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  MapView mapview = (MapView) findViewById(R.id.mapview);
  mapview.setBuiltInZoomControls(true);
 }

 @Override
 protected boolean isRouteDisplayed() {
  // TODO Auto-generated method stub
  return false;
 }
}
5.Make the changes in AndroidManifest.xml file by including internet permission <uses-permission android:name="android.permission.INTERNET" /> and indicate the use of google map library <uses-library android:name="com.google.android.maps" />

AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.aj.mapviewapplication"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<uses-permission android:name="android.permission.INTERNET" />

<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<uses-library android:name="com.google.android.maps" />
<activity
android:name=".MainActivity"
android:label="@string/title_activity_main" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>
6.Run your Android Application by rightclicking project Run as → android project. If everything goes well you will be shown a map of North America which you can zoom in and drag around.

Output:

The output of this example would be similar to the one as follows:




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