How to switch from the default ConstraintLayout to RelativeLayout in Android Studio

问题

I have the latest android Studio (2.3 beta 3) and it seems ConstraintLayout is the default when creating a project. How can I make Android Studio use the RelativeLayout as the default layout element for new projects ?

回答1:

Well, I saw the answer above and it worked for me too. But, I gave it a shot, and succeded converting my current project to Relative Layout. Do as follows:

At activity_main.xml tab, change it to text. At the top of it, you'll find the following:

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

Just change all before xmlns to RelativeLayout. Doing so will also change the very bottom line where you would find:

</android.support.constraint.ConstraintLayout>

to

</RelativeLayout>

Problem solved! Be happy :P

回答2:

I am answering this for android studio 2.3.1. One of the easiest ways to set RelativeLayout as default layout is going to text mode and editing the XML file as follows:

Change this line:

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

To

<android.widget.RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

And do check your ending tag changes to this:

</android.widget.RelativeLayout>

Also (optionally) go ahead and delete this line if it's being shown in grey:

xmlns:app="http://schemas.android.com/apk/res-auto"

Edit:

This is an optional change to make in project, I came across this tip while going through Udacity's Android Developer Course

If the constraint layout is not needed in the project remove the following dependency from build.gradle by deleting this line and then doing gradle sync:

    compile 'com.android.support.constraint:constraint-layout:1.0.0-beta4'

回答3:

Android studio 3.0

step0:

Close android studio

step1:

Goto C:\Program Files\Android\Android Studio\plugins\android\lib\templates\activities\common\root\res\layout\

step2:

Backup simple.xml.ftl

step3:

Change simple.xml.ftl to code below and save :

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${packageName}.${activityClass}">


<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentStart="true"
    android:layout_alignParentTop="true"
    android:layout_marginStart="12dp"
    android:layout_marginTop="21dp"
    android:text="don't forget to click useful if this helps. this is my first post at stackoverflow!"
    android:textSize="20sp"
    />

</RelativeLayout>

回答4:

for android studio 3.1

If you want your default android studio change, just follow bellow steps:

first

go to C:\Program Files\Android\Android Studio\plugins\android\lib\templates\activities\common\root\res\layout

i.e. the file directory where you have installed android studio.

then

copy simple.xml from another place just for backup

after that

open simple.xml file and replace it's code as bellow

<?xml version="1.0" encoding="utf-8"
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="${packageName}.${activityClass}">



</RelativeLayout>

but if you just want to change this project layout, just go to activity_main.xml and then go to text and post upper code to there

回答5:

I think u want to change the default settings of android studio. Whenever a layout or Activity in created u want to create "RelativeLayout" by default. In that case, flow the step below

1. click any folder u used to create layout or Activity
2. then "New>> Edit File Templates
3. then go to "Other" tab
4. select "LayoutResourceFile.xml" and "LayoutResourceFile_vertical.xml"
5. change "${ROOT_TAG}" to "RelativeLayout"
6. click "Ok"

you are done

回答6:

inefficient solution:

Create a new Layout

1. Go to /res/layout folder in Android Studio
2. Right click -> New -> Layout Resource files
3. give it a name and add .xml at the end
4. Erase the Root Element field and type 'RelativeLayout'

回答7:

1. Right click on ConstraintLayout.
2. Select convertview.
3. select RelativeLayout

For more clarity refer below image

回答8:

The easiest method is to go to your .xml file in text mode, and replace the top line:

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"

And then proceed to replace it with:

<android.widget.RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

If you then go back into design mode, you can see that you now have a relative layout. This also automatically changes the end tag, so no issues there.

回答9:

A very short way to do it is just right click on the activity_main.xml design background and select convert view then select Relativealayout. Your code in Xml Text will auto. Change. Goodluck

回答10:

Just right click on the ConstrainLayout and select the "convert view" and then "RelativeLayout":

回答11:

None of these solutions worked for me...seemingly until I stumbled across this setting, see image. File > Settings > Editor > Layout Editor > Check "Prefer XML Editor"

https://i.stack.imgur.com/9CHe7.png

回答12:

The easiest way would be to select Relativelayout from the Pallete, and then use it.

回答13:

Android 3.0

In activity_main.xml

Replace in this tag i.e <android.support.constraint.ConstraintLayout>

android.support.constraint.ConstraintLayout

with

RelativeLayout

回答14:

just do it: in component tree right click on ConstraintLayout and select relativelayout on convert view...

回答15:

TO CHANGE ConstraintLayout to RelativeLayout: This will work in Android studio 3.0.1

Change->

<android.support.constraint.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"

into

<android.widget.RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

and->

</android.support.constraint.ConstraintLayout>

nto

</android.widget.RelativeLayout>

来源：https://stackoverflow.com/questions/42261712/how-to-switch-from-the-default-constraintlayout-to-relativelayout-in-android-stu