package br.com.bloder.blorm;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;

import br.com.bloder.blormlib.Blorm;
import br.com.bloder.blormlib.validation.Validations;

public class MainActivity extends AppCompatActivity {

  private EditText editTextFilled;
  private Button submit;

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

    editTextFilled = (EditText) findViewById(R.id.edit_text_filled);
    submit = (Button) findViewById(R.id.submit);

    new Blorm.Builder(this).field(editTextFilled).is(Validations.filled).onSubmit(submit);
  }
}

package br.com.bloder.blorm;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

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

--- 
+++ 
@@ -2,12 +2,25 @@
 
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.widget.Button;
+import android.widget.EditText;
+
+import br.com.bloder.blormlib.Blorm;
+import br.com.bloder.blormlib.validation.Validations;
 
 public class MainActivity extends AppCompatActivity {
+
+  private EditText editTextFilled;
+  private Button submit;
 
   @Override
   protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.activity_main);
+
+    editTextFilled = (EditText) findViewById(R.id.edit_text_filled);
+    submit = (Button) findViewById(R.id.submit);
+
+    new Blorm.Builder(this).field(editTextFilled).is(Validations.filled).onSubmit(submit);
   }
 }
Add edit text and button example in main activity
