TextInputLayout的基本使用

TextInputLayout属于EditText的一个浮动标签，属于Material Design 设计规范中的，效果可以看下面的动图

账号：只是普通EditText

密码：用TextInputLayout包裹的EditText

使用的话TextInputLayout包裹一个EditText就可以。当然TextInputLayout也只能包裹EditText：

<android.support.design.widget.TextInputLayout
   android:id="@+id/tl_etpass"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
    <EditText
        android:id="@+id/et_pass"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="请输入密码" />
</android.support.design.widget.TextInputLayout>

具体完整代码：

xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.wjs.myedittextdemo1.MainActivity">


    <EditText
        android:id="@+id/et_name"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="请输入账号" />

    <android.support.design.widget.TextInputLayout
       android:id="@+id/tl_etpass"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <EditText
            android:id="@+id/et_pass"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="请输入密码" />
    </android.support.design.widget.TextInputLayout>



    <Button
        android:id="@+id/login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="登录" />
</LinearLayout>

activity:

package com.wjs.myedittextdemo1;

import android.support.design.widget.TextInputLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private EditText etName;
    private EditText etPass;
    private Button login;
    private TextInputLayout tlEtpass;

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

    private void initview() {
        etName = findViewById(R.id.et_name);
        etPass = findViewById(R.id.et_pass);
        tlEtpass = findViewById(R.id.tl_etpass);
        login = findViewById(R.id.login);
    }

    private void initData() {

        login.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                 String name = etName.getText().toString().trim();
                 String passwarld = etPass.getText().toString().trim();
                if (!name.equals("大不懂")) {
                    etName.setError("请输入正确用户名");
                    Toast.makeText(MainActivity.this,"用户名错误",Toast.LENGTH_SHORT).show();
                } else if (!passwarld.equals("123456")) {
                    tlEtpass.setErrorEnabled(true);
                    tlEtpass.setError("请输入正确密码");
                    Toast.makeText(MainActivity.this,"密码错误",Toast.LENGTH_SHORT).show();
                } else {
                    tlEtpass.setErrorEnabled(false);
                    Toast.makeText(MainActivity.this,"登录成功",Toast.LENGTH_SHORT).show();
                }
            }
        });

    }
}

进阶修改样式

密码：

EditText中添加：android:inputType="textPassword"

TextInputLayout中添加：
app:passwordToggleEnabled="true"
app:passwordToggleTint="@color/colorPrimary"

最大长度：

TextInputLayout中添加：

app:counterEnabled="true"
app:counterMaxLength="3"
app:counterOverflowTextAppearance="@style/MyOverflowText"

style：

<style name="MyOverflowText" parent="TextAppearance.AppCompat.Small">
    <item name="android:textColor">#ffe600</item>
</style>

错误提示：

TextInputLayout中添加：

app:errorEnabled="true"
app:errorTextAppearance="@style/MyErrorText"

style：

<style name="MyErrorText" parent="TextAppearance.AppCompat.Small">
    <item name="android:textColor">#ff4444</item>
</style>

默认样式：

TextInputLayout中添加：

app:hintTextAppearance="@style/MyHintText"

EditText中添加：

android:theme="@style/MyEditText"

style：

<style name="MyHintText" parent="TextAppearance.AppCompat.Small">
    <item name="android:textColor">@color/colorPrimary</item>
</style>

<!--Input field style-->
<style name="MyEditText" parent="Theme.AppCompat.Light">
    <item name="colorControlNormal">#000022</item>
    <item name="colorControlActivated">@color/colorPrimary</item>
    <item name="android:textSize">18sp</item>
</style>

完整代码：

xml:

<android.support.design.widget.TextInputLayout
    android:id="@+id/tl_etstyles"
    android:layout_width="match_parent"
    app:errorEnabled="true"
    app:counterEnabled="true"

    app:counterMaxLength="3"
    app:passwordToggleEnabled="true"
    app:passwordToggleTint="@color/colorPrimary"
    app:counterOverflowTextAppearance="@style/MyOverflowText"
    app:errorTextAppearance="@style/MyErrorText"
    app:hintTextAppearance="@style/MyHintText"
    android:layout_height="wrap_content">
    <EditText
        android:theme="@style/MyEditText"
        android:id="@+id/et_styles"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="textPassword"
        android:hint="样式展示" />
</android.support.design.widget.TextInputLayout>

activity：

etStyles = findViewById(R.id.et_styles);
etStyles.addTextChangedListener(mTextWatcher);

private TextWatcher mTextWatcher = new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

    }

    @Override
    public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

    }

    @Override
    public void afterTextChanged(Editable editable) {
        Editable text = tlEtstyles.getEditText().getText();
        if (!text.toString().equals("123"))
            tlEtstyles.setError("输入123");//show
        else
            tlEtstyles.setError(null);//hide
    }
};

style：

<style name="MyHintText" parent="TextAppearance.AppCompat.Small">
    <item name="android:textColor">@color/colorPrimary</item>
</style>

<!--Input field style-->
<style name="MyEditText" parent="Theme.AppCompat.Light">
    <item name="colorControlNormal">#000022</item>
    <item name="colorControlActivated">@color/colorPrimary</item>
    <item name="android:textSize">18sp</item>
</style>
<style name="MyErrorText" parent="TextAppearance.AppCompat.Small">
    <item name="android:textColor">#ff4444</item>
</style>

<style name="MyOverflowText" parent="TextAppearance.AppCompat.Small">
    <item name="android:textColor">#ffe600</item>
</style>

感谢：https://blog.csdn.net/yechaoa/article/details/78699045

源码下载

本文地址：https://blog.csdn.net/qq_35698774/article/details/110497852