Android : Support multiple themes in an android application

Gaurav Bansal
11 Jan 0 0

If you are developing a theme based application to enhance user experience, then following steps needs to follow.

We are taking example of an android application having 2 themes white and black.

Step 1:
Define 2 themes in your application's styles.xml file

<style name="SampleAppBlackTheme">
    <item name="ic_action_accept">@drawable/ic_action_accept</item>
    <item name="ic_action_cancel">@drawable/ic_action_cancel</item>
    <item name="ic_action_delete">@drawable/ic_action_delete</item>
</style>
<style name="SampleAppWhiteTheme">
    <item name="ic_action_accept">@drawable/ic_action_accept_white</item>
    <item name="ic_action_cancel">@drawable/ic_action_cancel_white</item>
    <item name="ic_action_delete">@drawable/ic_action_delete_white</item>
</style>
Step 2:
Define a default theme for MainActuvity in android manifest:
<activity    
    android:name=".MainActivity"    
    android:screenOrientation="portrait"    
    android:theme="@style/SampleAppBlackTheme"
    android:windowSoftInputMode="stateHidden|adjustNothing" >
.........
</activity>
 
Step 3:
Based on User choice of theme, set theme programmatically in onCreate() method of respective activity:
@Overrideprotected void onCreate(Bundle savedInstanceState) {
    overridePendingTransition(0, 0);
    if (Constants.GO_WHITE)
        setTheme(R.style.SampleAppWhiteTheme);
    else
       setTheme(R.style.SampleAppBlackTheme);
    ........
}
P.s.
In case of multiple activities, define 2 themes for each activity
 
Step 4:
Define the common items in the attrs.xml as below :
<attr name="ic_action_accept" format="reference" />
<attr name="ic_action_cancel" format="reference" />
<attr name="ic_action_delete" format="reference" />
 
Step 5:
Use the defined attributes in the layout xml file or use programmatically in any view as per below example.
Layout example :
<ImageView    
    android:id="@+id/accept_icon"    
    android:layout_width="@dimen/abc_action_button_min_width"    
    android:layout_height="@dimen/abc_action_bar_default_height_material"
    android:src="?attr/ic_action_accept"    
    android:visibility="visible" />
 
Fragment or View example :
int[] attrs = new int[]{R.attr.ic_action_accept};
TypedArray typedArray = getActivity().obtainStyledAttributes(attrs);
Drawable ic_action_accept = typedArray.getDrawable(0);
 
These attribute will be resolved in styles.xml file and return the drawable or color as per the current theme of the activity. 
 
That's how multiple themes can be supported. In case of any questions please comment.
0 Dislike
Follow 0

Please Enter a comment

Submit

Other Lessons for You

Session Tracking In Java Servlets
Session Tracking: HTTP is a stateless protocol. Each request is independent of the previous one. However, in some applications, it is necessary to save state information so that information can be collected...

SR-IT ACADEMY | 07 Aug

2 0
0
Core Java
Introduction: An Object Oriented Programming Language consists of Objects. There are object oriented programming languages like Smalltalk, C++. Each and every OOP language has some underlying disadvantages....
Java : Command Line Arguments
The parameters which are provided to the program at the command line. Eg:d:\>java a 10 20 30 Here,“java” is an interpreter, “a” is filename,10,20,30 are arguments passed to...

Svg Reddy | 29 Jul

0 0
0
Why Should We Learn Java Language?
Most of starters has confusion today that which of the programming language should be chosen to work on. It totally depends upon your need. As per my opinion, if you want to grow your career in IT industry...

Looking for Android Application Development Training ?

Find best Android Application Development Training in your locality on UrbanPro.

Do you offer Android Application Development Training ?

Create Free Profile »
Sponsored

Find Best Android Application Development Training ?

Find Now »