EditText usage details

This article mainly introduces some knowledge points in Android development. By reading this article, you will gain the following contents:

EditText inherits as follows:

java.lang.Object    
       ↳ android.view.View     
              ↳ android.widget.TextView      
                      ↳ android.widget.EditText

EditText is mainly used to input and modify text content.

It is restricted that only plain text can be entered. Examples are as follows:

<EditText
      android:id="@+id/plain_text_input"
      android:layout_height="wrap_content"
      android:layout_width="match_parent"
      android:inputType="text"/>

    <!-- 自定义EditText 背景 -->

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="10dp"
        android:layout_marginRight="10dp"
        android:layout_marginTop="10dp"
        android:background="@drawable/custom_edittext_background"
        android:gravity="center"
        android:hint="一、自定义EditText背景框"
        android:padding="8dp"
        android:textSize="16sp" />

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">

    <!-- 圆角-->
    <corners android:radius="5dp" />
    <!--描边-->
    <stroke
        android:width="1dp"
        android:color="@android:color/holo_blue_light" />

</shape>

<EditText
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:autoText="true"
        android:hint="二、自动检测输入更正属性 autoText"
        android:textColor="#FF6100" />

<!-- 以密文的形式显示 -->

    <EditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="三、以密文的形式显示密码"
        android:password="true" />

Only Arabic numerals can be entered to realize the following:

  <!-- 设置允许输入的字符 -->

    <EditText
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:digits="123456789.+-*/\n()"
        android:hint="四、设置限制允许输入阿拉伯数字" />

EditText is often used to get the user input content, because we want to avoid the situation that the user input content is empty.

The results are as follows:

The implementation code is as follows: