Create new project in Android Studio with steps as below:
Open build.gradle file in Gradle Scripts and add new library as below:
implementation 'com.mobsandgeeks:android-saripaar:2.0.3' Open res\values\strings.xml file and add new string as below:
Learn Android with Real Apps I agree to the terms of use Username Password Confirm Password Email Website Age Phone Save Username already exists Open res\layout\activity_main.xml file and create layout as below:
Add code to MainActivity.java in android.demo.learnandroidwithrealapps package as below:
package android.demo.learnandroidwithrealapps; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.CheckBox; import android.widget.EditText; import android.widget.Toast; import com.mobsandgeeks.saripaar.QuickRule; import com.mobsandgeeks.saripaar.ValidationError; import com.mobsandgeeks.saripaar.Validator; import com.mobsandgeeks.saripaar.annotation.Checked; import com.mobsandgeeks.saripaar.annotation.ConfirmPassword; import com.mobsandgeeks.saripaar.annotation.Email; import com.mobsandgeeks.saripaar.annotation.Length; import com.mobsandgeeks.saripaar.annotation.Max; import com.mobsandgeeks.saripaar.annotation.Min; import com.mobsandgeeks.saripaar.annotation.NotEmpty; import com.mobsandgeeks.saripaar.annotation.Password; import com.mobsandgeeks.saripaar.annotation.Pattern; import com.mobsandgeeks.saripaar.annotation.Url; import java.util.List; public class MainActivity extends AppCompatActivity implements Validator.ValidationListener < @NotEmpty @Length(min = 3, max = 10) private EditText editTextUsername; @NotEmpty @Password @Pattern(regex = "((?=.*\\d)(?=.*[a-z])(?=.*[A-Z])(?=.*[@#$%]).)") private EditText editTextPassword; @ConfirmPassword private EditText editTextConfirmPassword; @NotEmpty @Pattern(regex = "^\\(?([0-9])\\)?[-.\\s]?([0-9])[-.\\s]?([0-9])$") private EditText editTextPhone; @Min(18) @Max(120) private EditText editTextAge; @NotEmpty @Email private EditText editTextEmail; @Url private EditText editTextWebsite; @Checked private CheckBox checkBoxAgree; private Button buttonSave; private Validator validator; @Override protected void onCreate(Bundle savedInstanceState) < super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); validator = new Validator(this); validator.setValidationListener(this); validator.put(editTextUsername, new QuickRule() < @Override public boolean isValid(EditText view) < EditText editText = (EditText) view; if (editText.getText().toString().equalsIgnoreCase("abc")) < return false; >return true; > @Override public String getMessage(Context context) < return getText(R.string.username_already_exists).toString(); >>); > private void initView() < editTextUsername = findViewById(R.id.editTextUsername); editTextPassword = findViewById(R.id.editTextPassword); editTextConfirmPassword = findViewById(R.id.editTextConfirmPassword); editTextAge = findViewById(R.id.editTextAge); editTextPhone = findViewById(R.id.editTextPhone); editTextEmail = findViewById(R.id.editTextEmail); editTextWebsite = findViewById(R.id.editTextWebsite); checkBoxAgree = findViewById(R.id.checkBoxAgree); buttonSave = findViewById(R.id.buttonSave); buttonSave.setOnClickListener(new View.OnClickListener() < @Override public void onClick(View view) < buttonSave_onClick(view); >>); > private void buttonSave_onClick(View view) < validator.validate(); >@Override public void onValidationSucceeded() < Toast.makeText(this, "We got it right!", Toast.LENGTH_SHORT).show(); >@Override public void onValidationFailed(List errors) < for (ValidationError error : errors) < View view = error.getView(); String message = error.getCollatedErrorMessage(this); // Display error messages if (view instanceof EditText) < ((EditText) view).setError(message); >else < Toast.makeText(this, message, Toast.LENGTH_LONG).show(); >> > > 