public class MainActivity extends Activity {

	private LicenseChecker  mChecker;
	private LicenseCheckerCallback mLicenseCheckerCallback;
    private static final String BASE64_PUBLIC_KEY = " здесь мой ключ ";
	byte[] SALT = new byte[] {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20};
	
    class myLicenseCheckerCallback implements LicenseCheckerCallback {
@Override
public void allow(int reason) {	
	if (isFinishing()) return;
	DisplayResult("allow");	
}

@Override
public void dontAllow(int reason) {
	if (isFinishing()) return;
	DisplayResult("dont allow");
}

@Override
public void applicationError(int errorCode) { 
	if (isFinishing()) return;
	DisplayResult("error");
}} 		
		
	public void DisplayResult(String s)	{
		TextView tw=(TextView)findViewById(R.id.textView1);
		tw.setText(s);
	}
    
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
               
        mLicenseCheckerCallback = new myLicenseCheckerCallback();
        String deviceId = Secure.getString(getContentResolver(), Secure.ANDROID_ID);  
        mChecker = new LicenseChecker(
        		this, new ServerManagedPolicy(
        				this, new AESObfuscator(SALT, getPackageName(), deviceId)), BASE64_PUBLIC_KEY);
        mChecker.checkAccess(mLicenseCheckerCallback);		      
        
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        mChecker.onDestroy();
    }
}