CODEWITHSUNDEEP
androidandroid-layout
natsumiyu
natsumiyu

Reputation: 3257

How to change layout when rotate?

I have an xml in layout-normal, layout-large and layout-land. What I'm trying to do is to use the provided xml in specific orientation.

I already search for it here and this are what I've already tried.

1) I used different layout name but same ids in it and override onConfigurationChanged and set the layout there. Here's my code

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

    if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT)
    {
        setContentView(R.layout.activity_login2);
    }
    if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE)
    {
        setContentView(R.layout.activity_login );
    }
}

It does changed but when the screen rotates the inputed data in the EditText is gone. I tried to use onSaveInstanceState to save the instance but still the same. It looks like it destroys the activity and create a new one where all my widget that is initialized in onCreate is gone.

2) Then I found layout-land and just put the landscape layout there with same layout name like in layout-normal and layout-large example is

res/layout-land -> activity_login.xml

res/layout-normal-> activity_login.xml

res/layout-large-> activity_login.xml

and removes the onConfigurationChanged on the code but still doesn't work.

In my AndroidManifest in LoginActivity I put 

     <activity
        android:name=".LoginActivity"
        android:configChanges="keyboardHidden|orientation|screenSize"
        android:theme="@style/DefaultTheme"
        android:windowSoftInputMode="adjustResize">
        <intent-filter>
          <action android:name="android.intent.action.MAIN" />
          <category android:name="android.intent.category.LAUNCHER"/>
        </intent-filter>
    </activity>

Is there anyway to change the layout when screen is rotated? Thank you in advance.

Upvotes: 1

Views: 10018

Answers (3)

Ben P.
Ben P.

Reputation: 54204

The "screen size" qualifier has higher precedence than the "orientation" qualifier. https://developer.android.com/guide/topics/resources/providing-resources.html#AlternativeResources

Android supports several configuration qualifiers and you can add multiple qualifiers to one directory name, by separating each qualifier with a dash. Table 2 lists the valid configuration qualifiers, in order of precedence

Suppose you have these files:

res/
    layout-normal/
        layout.xml
    layout-land/
        layout.xml

If you have a normal screen size device, it won't matter whether you use portrait or landscape. layout-normal will always be chosen over layout-land.

You can solve this two different ways.

First, you could put your "default" layout in the plain layout directory (instead of layout-normal). So your files would be

res/
    layout/
        layout.xml
    layout-land/
        layout.xml

Second, you could combine qualifiers in order to make it obvious that you're differentiating between portrait and landscape. So your files would be

res/
    layout-normal/
        layout.xml
    layout-normal-land/
        layout.xml

Upvotes: 5

Jitesh Mohite
Jitesh Mohite

Reputation: 34190

First of all you don't require to create another .xml like activity_login2, you can use same activity_login.xml.

Android have default folder /res/layout which includes all your layout. So whenever you rotate device it will use same activity_login.xml file.

you can add a new folder /res/layout-land, copy activity_login.xml into it and make the needed adjustments.

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

    if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT)
    {
        setContentView(R.layout.activity_login2); // it will use .xml from /res/layout
    }
    if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE)
    {
        setContentView(R.layout.activity_login); // it will use xml from /res/layout-land
    }
}

Upvotes: 1

Tim Biegeleisen
Tim Biegeleisen

Reputation: 521093

I think you might be missing the point of the layout-land folder. It should be the case that whatever layout you specify there, say some_activity.xml, will be automatically used when the device rotates to landscape. You can name the layout file the same exact name which is already being used by your potrait version. And the layout file itself can also use the same IDs to name the various widgets which appear.

With regard to you losing some UI state when the device is rotated, you might have to override onSaveInstanceState(Bundle savedInstanceState) and save some state from your UI when a rotation happens. This doesn't really have anything to do with which layout file gets shown though.

Upvotes: 2

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