AValidations是一个免费的、开源的、简易的、遵循ApacheLicence2.0开源协议发布，超级容易扩展的android表单验证的小框架
使用方法：
1.下载zip或者克隆AValidations项目2.导入Eclipse，右键工程->preference->Android->library->Add,选择AValidations工程加入后apply应用3.继承ValidationExecutor写出自己的校验器：
public class UserNameValidation extends ValidationExecutor { public boolean doValidate(Context context, String text) { String regex = "^[a-zA-Z](?=.*?[a-zA-Z])(?=.*?[0-9])[a-zA-Z0-9_]{7,11}$"; boolean result = Pattern.compile(regex).matcher(text).find(); if (!result) { Toast.makeText(context, context.getString(R.string.e_username_hint), Toast.LENGTH_SHORT).show(); return false; } return true; }}4.使用EditTextValidator进行校验：
public class LoginActivity extends Activity implements OnClickListener{ private EditText usernameEditText; private EditText passwordEditText; private Button loginButton; private EditTextValidator editTextValidator; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_login); usernameEditText = (EditText) findViewById(R.id.login_username_edittext); passwordEditText = (EditText) findViewById(R.id.login_password_edittext); loginButton = (Button) findViewById(R.id.login_button); loginButton.setOnClickListener(this); editTextValidator = new EditTextValidator(this) .setButton(loginButton) .add(new ValidationModel(usernameEditText,new UserNameValidation())) .add(new ValidationModel(passwordEditText,new PasswordValidation())) .execute(); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.login_button: if (editTextValidator.validate()) { Toast.makeText(this, "通过校验", Toast.LENGTH_SHORT).show(); } break; } }5.如果需要实现没有填写表单时表单提交按钮不可点击效果需要设置setButton(view)和写Button背景的selector，如：
<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="https://schemas.android.com/apk/res/android"><item android:drawable="@drawable/red_btn_normal" android:state_focused="true" android:state_pressed="false"/><item android:drawable="@drawable/red_btn_selected" android:state_focused="true" android:state_pressed="true"/><item android:drawable="@drawable/red_btn_selected" android:state_focused="false" android:state_pressed="true"/><item android:drawable="@drawable/red_btn_disable" android:state_enabled="false"/><item android:drawable="@drawable/red_btn_normal"/></selector>
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