[Android] Notes on xml

RelativeLayout --If you use toEndOf etc. in RelativeLayout, It can be side by side even if it is not LinearLayout. --Center Horizontal (true) of RlativeLayout can be used for centering.

• Use with wrap instead of match.

EditText
--If you want to enter characters in the placeholder, use hint.

hoge.xml

<EditText
 android:id="@+id/login"
 android:layout_width="200dp"
 android:layout_height="40dp"
 android:hint="@string/login"
 android:textColor="@color/white"
 android:textColorHint="@color/clear_white" />

Centered

--If center_vertical does not work, set layout_gravity to center.

Area division

--When you want to place two same views side by side: set layout_weight: 1 and set Width = 0. --When you want to place two same views vertically: set layout_weight: 1 and set Height = 0.

I want to make something like a tab

--Use ViewPager / PagerTitleStrip.

Centered characters

--Set gravity = center.

• The arrangement of hints can also be changed.

Round the button

--Create shape.xml separately in drawable and refer to it in the background of view.

shape.xml

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

    <!--Border width:Line width, color:Line color-->
    <stroke
        android:width="0.6dp"
        android:color="@color/white" />

</shape>

Invert the text color by pressing (white → black)

--Create a selector in hoge.xml of drawable and refer to it with textColor.

hoge.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
        <item android:s="true" android:state_pressed="false" android:color="@color/black" />
        <item android:state_focused="true" android:state_pressed="true" android:color="@color/black" />
        <item android:state_focused="false" android:state_pressed="true" android:color="@color/black" />
        <item android:color="@color/white" />

</selector>

Replace the image by pressing (active color image → inactive color image)

--Create a selector in huga.xml of drwable and refer to it in src.

huga.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <!--Pressed state-->
    <item
        android:state_pressed="true"
        android:drawable="@drawable/setting_click" />
    <!--Normal state-->
    <item
        android:drawable="@drawable/setting" />
</selector>