Android之表单验证，Validation三方集成。

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

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="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"> <EditText android:id="@+id/et1" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="请输入姓名" /> ...... <EditText android:id="@+id/et6" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="请输入姓名" /> <Button android:text="Button" android:layout_width="match_parent" android:layout_height="wrap_content" android:id="@+id/button" /> </LinearLayout> 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

<resources> <string name="app_name">ValidationDemo</string> <string name="errorMessage">不能为空</string> </resources>

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<ValidationError> 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/

yechaoa 认证博客专家 Android Jetpack Flutter 小程序 专注于Android领域，同时探索于大前端方向，研究并应用落地前端、小程序、Flutter、Kotlin等相关热门技术点