非空格式验证框架--Validation的使用

android中判断控件是否为空的地方非常之多，比如登录注册，只要是需要填写东西的地方基本上都需要判空。

难度不大，但是代码相对冗杂，如果集成框架的话就相对简单多了。

1.添加依赖

 compile 'com.mobsandgeeks:android-saripaar:2.0.3'

2.布局

 "1.0" encoding="utf-8"?>
 "http://schemas.android.com/apk/res/android"
     android:id="@+id/activity_main"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
     android:padding="10dp">


         android:id="@+id/et1"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:hint="请输入姓名" />

         ......


         android:id="@+id/et6"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:hint="请输入姓名" />


         android:text="Button"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:id="@+id/button" />

3.获取对象并设置相应判断类型

 @BindView(R.id.button)
 Button button;

 @BindView(R.id.et1)
 @NotEmpty(messageResId = R.string.errorMessage)//类型
 @Order(1)//第几个
 EditText et1;
 @BindView(R.id.et2)
 @NotEmpty(messageResId = R.string.errorMessage)
 @Order(2)
 EditText et2;

strings.xml

     "app_name">ValidationDemo
     "errorMessage">不能为空

4.onCreate中初始化

 validator = new Validator(this);
 validator.setValidationListener(this);

两个监听方法

 @Override
 public void onValidationSucceeded() {//不为空的时候执行
     //do somethings
     //sendSubmit();
 }

 @Override
 public void onValidationFailed(List errors) {//为空的时候执行
     for (ValidationError error : errors) {
         View view = error.getView();
         String message = error.getCollatedErrorMessage(this);
         if (view instanceof EditText) {
             ((EditText) view).setError(message);
         }
     }
 }

5.调用

 @Override
 public void onClick(View view) {
     switch (view.getId()) {
         case R.id.button:
             validator.validate();
             break;
     }
 }

6.扩展（非空、邮箱等）

NotEmpty
@NotEmpty(messageId = R.string.validation_name, order = 1)
private EditText mNameEditText;

MaxLength
MinLength

@MinLength(value = 1, messageId = R.string.validation_participants, order = 2)
private EditText mNameEditText;

MaxValue
MinValue

@MinValue(value = 2L, messageId = R.string.validation_name_length)
private EditText mEditNumberOfParticipants;

MaxNumberValue
MinNumberValue

@MinNumberValue(value = "5.5", messageId = R.string.validation_name_length)
private EditText mEditPotentialOfHydrogen;

RegExp

@RegExp(value = EMAIL, messageId = R.string.validation_valid_email)
private EditText mEditEmail;
@RegExp(value = "^[0-9]+$", messageId = R.string.validation_valid_count)
private EditText mEditCount;

DateInFuture

@DateInFuture(messageId = R.string.validation_date)
private TextView mTxtDate;

DateNoWeekend

@DateNoWeekend(messageId = R.string.validation_date_weekend)
private TextView mTxtDate;

Custom

@Custom(value = MyVeryOwnValidator.class, messageId = R.string.validation_custom)
private EditText mNameEditText;

Demo地址：https://github.com/yechaoa/ValidationDemo

github：https://github.com/ragunathjawahar/android-saripaar/