Android checking the Density of the device and Version of an Application.

In order to get Device Density simply call the getScreenDensity() and version using 
getVersionName().

Create a class Utility and define given two static method and that can be access by YourClassname.getScreenDensity(this)
as well as YourClassname.getVersionName(this)

1) Device Density

/**
* Check the device density
*
* @param context
*   is current Activity
*/
public static String getScreenDensity(Context context) {
String denstity = null;
DisplayMetrics metrics = new DisplayMetrics();
((Activity) context).getWindowManager().getDefaultDisplay()
.getMetrics(metrics);
switch (metrics.densityDpi) {
case DisplayMetrics.DENSITY_LOW:
denstity = "Low";
break;
case DisplayMetrics.DENSITY_MEDIUM:
denstity = "Medium";
break;
case DisplayMetrics.DENSITY_HIGH:
denstity = "High";
break;
default:
denstity = "Ehigh";
break;
}
Log.d(TAG, "getScreenDensity=" + metrics.densityDpi);
return denstity;
}

2) Version Name

/**
* Check the device version mane
*
* @param context
* is current Activity
*/
public static String getVersionName(Context context) {
PackageInfo pinfo;
String versionName = null;
try {
pinfo = context.getPackageManager().getPackageInfo(
context.getPackageName(), 0);
versionName = pinfo.versionName;
} catch (NameNotFoundException e) {
versionName = "Name Not Found";
}
return versionName;

}