Initialize app

   public class MainActivity extends AppCompatActivity {

    private static final int ADD_PACKAGE = 1;
    private static final int REMOVE_PACKAGE = 2;
    private static final int CHECK_PACKAGE = 3;
    private final String TAG = "MainActivity";
    static final int DEVICE_ADMIN_ADD_RESULT_ENABLE = 1;

    private Button mToggleAdminBtn;
    private ComponentName mDeviceAdmin;
    private DevicePolicyManager mDPM;
    private CCMProfile mCCMProfileObj;
    private CertificateProfile mCertificateProfile;
    private Utils mUtils;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //...called when the activity is starting. This is where most initialization should go
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        TextView LogView = (TextView) findViewById(R.id.logview_id);
        LogView.setMovementMethod(new ScrollingMovementMethod());
        mDeviceAdmin = new ComponentName(MainActivity.this, SampleAdminReceiver.class);
        mDPM = (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);

        mUtils = new Utils(LogView, TAG);

        // Check if device supports Knox SDK
        mUtils.checkApiLevel(24, this);

        mToggleAdminBtn = (Button) findViewById(R.id.ToggleAdminbtn);
        Button ActivateLicenseBtn = (Button) findViewById(R.id.ActivateLicensebtn);
        Button DeactivateLicenseBtn = (Button) findViewById(R.id.DeactivateLicensebtn);
        Button SetCCMProfileBtn = (Button) findViewById(R.id.SetCCMProfilebtn);
        Button GetCCMProfileBtn = (Button) findViewById(R.id.GetCCMProfilebtn);
        Button DeleteCCMProfileBtn = (Button) findViewById(R.id.DeleteCCMProfilebtn);
        Button GetDefaultCertProfileBtn = (Button) findViewById(R.id.GetDefaultCertAliasbtn);
        Button InstallCertBtn = (Button) findViewById(R.id.InstallCertificatebtn);
        Button DeleteCertBtn = (Button) findViewById(R.id.DeleteCertificatebtn);
        Button AddPackageExemptListBtn = (Button) findViewById(R.id.AddPackageExemptListbtn);
        Button RemovePackageExemptListBtn = (Button) findViewById(R.id.RemovePackageExemptListbtn);
        Button CheckCCMEnabledForPackageBtn = (Button) findViewById(R.id.IsCCMPolicyEnabledForPackagebtn);
        Button ToggleTimaKeystoreBtn = (Button) findViewById(R.id.ToggleTimaKeystorebtn);
        Button IsTimaKeystoreEnabledBtn = (Button) findViewById(R.id.IsTimaKeystoreEnabledbtn);

        mToggleAdminBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                toggleAdmin();
            }
        });
        ActivateLicenseBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                activateLicense();
            }
        });
        DeactivateLicenseBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                deactivateLicense();
            }
        });
        SetCCMProfileBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                createCCMProfile();
            }
        });
        GetCCMProfileBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getCCMProfile();
            }
        });
        DeleteCCMProfileBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                deleteCCMProfile();
            }
        });
        GetDefaultCertProfileBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getDefaultCertificateAlias();
            }
        });
        InstallCertBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                createCertificate();
            }
        });
        DeleteCertBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                promptUserToDeleteCertificate();
            }
        });
        AddPackageExemptListBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                promptUserForPackage(ADD_PACKAGE);
            }
        });
        RemovePackageExemptListBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                promptUserForPackage(REMOVE_PACKAGE);
            }
        });
        CheckCCMEnabledForPackageBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                promptUserForPackage(CHECK_PACKAGE);
            }
        });
        ToggleTimaKeystoreBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                toggleTimaKeystore();
            }
        });
        IsTimaKeystoreEnabledBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                isTimaKeystoreEnabled();
            }
        });
    }

    //the logic for onClickListener functions are done here
}