I recently encountered this problem when doing an android project.To keep the app style consistent,Need to change the original edittext bottom line color to orange.Searched for some solutions online,Here is a summary of the record.

The default edittext underline color is blue,

We want to achieve an orange effect

Implementation

1. Prepare two background images

One as the default background for edittext and the other as the background when typing

note

Use 9.png, do not use png, otherwise the picture will be blurred, Spent

Create an xml file with selector in folder drawable

<!-Drawable/edittext_shape.xml->
<selector xmlns:android="http://schemas.android.com/apk/res/android">
 <item android:drawable="@ drawable/edittext_default" android:state_focused="false" />
 <item android:drawable="@ drawable/edittext_focused" android:state_focused="true" />
</selector>

Create a new style in styles.xml under the values ​​folder

This step is to reuse this style, You can also write code in the layout xml in the layout without style.

<!-Drawable/values ​​/styles.xml->
<style name="smsedittext">
 <item name="android:layout_marginleft">20dp</item>
 <item name="android:layout_marginright">20dp</item>
 <item name="android:layout_margintop">20dp</item>
 <item name="android:layout_width">match_parent</item>
 <item name="android:layout_height">wrap_content</item>
 <item name="android:textsize">16sp</item>
 <item name="android:background">@ drawable/edittext_shape</item>
</style>

Reference custom edittext in layout file

<!-Drawable/layout/fragment_bomb.xml->
<linearlayout
 android:id="@ + id/input"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:orientation="vertical"
 android:padding="20dp">
 <edittext
  android:id="@ + id/phone"
  android:hint="@ string/phone_hint"
  android:inputtype="phone"
  android:maxlength="11"
  android:maxlines="1" />
 <edittext
  android:id="@ + id/times"
  android:hint="@ string/times_hint"
  android:inputtype="number"
  android:maxlines="1" />
</linearlayout>

Drawing lines using xml

View this article:Android using xml to achieve the dividing line

edittext remove border

android:background="@ null"

This code can remove the border of edittext

edittext with bottom line

Create a new line.xml in drawable

<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
 <solid android:color="@ color/orange_normal" />
 <size
  android:height="1dp"
  android:width="1000dp" />
</shape>

Referenced in the layout's layout file

<edittext
  android:id="@ + id/phone"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:background="@ null"
  android:drawablebottom="@ drawable/line"
  android:hint="@ string/phone_hint"
  android:inputtype="phone"
  android:maxlength="11"
  android:maxlines="1" />