[JAVA] [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.

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


 android:textColorHint="@color/clear_white" />


--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.

Round the button

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


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

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


Invert the text color by pressing (white → black)

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


<?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" />


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.


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

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