gistfile1.txt

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_user_login);
        getAllWidgets();


        util = getIntent().getParcelableExtra("util");
        Log.e("TAG", "util===" + util);



       SharedPreferences sitePrefs = UserLoginActivity.this.getSharedPreferences(ApplicationUtil.SITE_PREF, Context.MODE_PRIVATE);
        siteUrl = sitePrefs.getString("siteUrl", null);
        String siteUrl = ApplicationUtil.getSiteUrl();
        Log.i("LOGIN ACTIVITY", "URL===>" + siteUrl);

        userPrefs = UserLoginActivity.this.getSharedPreferences(ApplicationUtil.USER_PREF, Context.MODE_PRIVATE);



        edUsername.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                if (s.length() < 1) {
                    ilUsername.setErrorEnabled(true);
                    ilUsername.setError("Please enter username");

                }

                if (s.length() > 0) {
                    ilUsername.setError(null);
                    ilUsername.setErrorEnabled(false);


                }

            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });
        edPassword.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                if (s.length() < 1) {
                    ilPassword.setErrorEnabled(true);
                    ilPassword.setError("Please enter password");

                }

                if (s.length() > 0) {
                    ilPassword.setError(null);
                    ilPassword.setErrorEnabled(false);


                }

            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });
        btnLogin.setOnClickListener(this);
        btnChangeURL.setOnClickListener(this);


    }


    public void getAllWidgets() {
        btnLogin = (Button) findViewById(R.id.activity_user_login_btn);
        btnChangeURL = (Button) findViewById(R.id.activity_user_login_change_url_btn);
        ilUsername=(TextInputLayout) findViewById(R.id.activity_user_login_username_til);
        ilPassword=(TextInputLayout) findViewById(R.id.activity_user_login_password_til);
        layout = (LinearLayout) findViewById(R.id.activity_login_parent_layout);
        edUsername = (EditText) findViewById(R.id.activity_user_login_username_et);
        edPassword = (EditText) findViewById(R.id.activity_user_login_password_et);


    }

    @Override
    public void onClick(View view) {
        final boolean isNoError;
        switch (view.getId())
        {
            case R.id.activity_user_login_btn:
             isNoError = checkValidation();




                if (isNoError) {
                    LoginUser(); // Webcall method 

                }
                break;
            case R.id.activity_user_login_change_url_btn:
               SharedPreferences sitePrefs = UserLoginActivity.this.getSharedPreferences(ApplicationUtil.SITE_PREF,
                        Context.MODE_PRIVATE);
                SharedPreferences  userPref = UserLoginActivity.this.getSharedPreferences(ApplicationUtil.USER_PREF,
                        Context.MODE_PRIVATE);
                SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(UserLoginActivity.this);

                SharedPreferences.Editor edit = userPref.edit();
                edit.clear();
                edit.apply();
                SharedPreferences.Editor editor=sitePrefs.edit();
                editor.clear();
                editor.apply();
                SharedPreferences.Editor editor1 = preferences.edit();
                editor1.clear();
                editor1.apply();

                Intent i = new Intent(UserLoginActivity.this, ChangeURLActivity.class);

                i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);

                startActivity(i);
                overridePendingTransition(R.anim.left_in, R.anim.right_out);
                finish();
                break;
        }

    }