How to set/get Meta Data in AndroidManifest

In AndroidManifest.xml


Meta data defined in AndroidManifest.xml can be retrieved with some codes like this:

try {
    ApplicationInfo ai = getPackageManager().getApplicationInfo(activity.getPackageName(), PackageManager.GET_META_DATA);
    Bundle bundle = ai.metaData;
    String myApiKey = bundle.getString("com.myapp.version.api.key");
} catch (NameNotFoundException e) {
    Log.e(TAG, "Failed to load meta data : " + e.getMessage());
} catch (NullPointerException e) {
    Log.e(TAG, "Failed to load meta data : " + e.getMessage());         
}