Get Android Device/App Info

// Get Model Name
import android.os.Build;
Build.MODEL

// Get Device ID
import android.provider.Settings.Secure;
Secure.getString(getContentResolver(), Secure.ANDROID_ID);

// Get app version name
String versionName = "0";
try
{
   versionName = getPackageManager().getPackageInfo(getPackageName(), 0).versionName;
}
catch(NameNotFoundException e)
{}