<EditText
android:hint="EditText未做任何設定"
android:layout_width="match_parent"
android:layout_height="wrap_content" />

//設定游標顏色
  android:textCursorDrawable="@drawable/solid_shape_bottom_line"

//去掉游標

android:textCursorDrawable=
 
"@null"

<EditText
android:id="@+id/et_classRefund"
android:text=""
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:textSize="@dimen/text_size_13"
android:gravity="center"
android:textCursorDrawable="@drawable/solid_shape_bottom_line"
android:textColor=
 
"@color/text_color_333333"/>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
    <size android:width="2dp" />
    <solid android:color="@color/textcolor_yellow" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
android:bottom="0dp"
android:left="-2dp"
android:right="-2dp"
android:top="-2dp">
        <shape>
            <solid android:color="@android:color/transparent" />
            <stroke
android:color="@color/textcolor_yellow"
android:width="1dp" />
            <padding android:bottom="4dp" />
        </shape>
    </item>
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item
android:bottom="0dp"
android:left="-2dp"
android:right="-2dp"
android:top="-2dp">
        <shape>
            <solid android:color="@android:color/transparent" />
            <stroke
android:width="1dp"
android:color="@color/gray" />
            <padding android:bottom="4dp" />
        </shape>
    </item>
</layer-list>

    在Activity中做EditText焦點監聽:

etClassRefund.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (hasFocus) {
etClassRefund.setBackgroundResource(R.drawable.et_underline_selected);
        } else {
etClassRefund.setBackgroundResource(R.drawable.et_underline_unselected);
        }
    }
});

    效果圖:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:state_focused="false" android:drawable="@drawable/et_underline_unselected"/>
    <item android:state_focused="true" android:drawable="@drawable/et_underline_selected"/>
</selector>

<EditText
android:id="@+id/et_classRefund"
android:text=""
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:textSize="@dimen/text_size_13"
android:gravity="center"
android:background="@drawable/edittext_bg_selector"
android:textCursorDrawable="@drawable/solid_shape_bottom_line"
android:textColor="@color/text_color_333333"/>