A very easy Android theme library for choose theme at runtime.

Very easy to provide an option to the user to change the theme of their choice. This library has already some prebuilt theme. So if you want to provide more option it's very easy. On the other hand, you can customize according to your requirement.

Sample 1	Sample 2	Night mode	Preference Fragment

The minimum API for this library is 17 (Android 4.2)

Add it to your root build.gradle at the end of repositories:

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
        }   
    }

now add the dependency

dependencies {
    implementation 'com.github.Iamsdt:ThemeLibrary:2.0'
}

Change your parent of app theme to LibraryAppTheme

Note: No need to add primary color, primary dark color and accent color. it's already added in the LibraryAppTheme, unless you want to update.

<!-- Base Theme -->
<style name="AppTheme" parent="LibraryAppTheme">
    .....
</style>

Update AndroidManifest.xml

<application
    ....
    
    android:theme="@style/AppTheme"
    tools:replace="android:theme">
    
        ....
        
</application>

Start ColorActivity

startActivityForResult(ColorActivity.createIntent(this),121)

now override onActivityResult() method and recreate the activity

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        super.onActivityResult(requestCode, resultCode, data)
        if (requestCode == 121){
            if (resultCode == Activity.RESULT_OK) {
                recreate()
            }
        }
    }

This library is highly customizable... Let's customize with your needs

If you want to provide your custom theme list(not default theme list) First crate theme in Style.xml

<style name="teal" parent="LibraryAppTheme.NoActionBar">
    <item name="colorPrimary">@color/teal_500</item>
    <item name="colorPrimaryDark">@color/teal_700</item>
    <item name="colorAccent">@color/blue_500</item>
    <item name="colorControlHighlight">@color/cyan_500</item>
</style>

Create an ArrayList of MyTheme and fill the array

val list = ArrayList<MyTheme>()
list.add(MyTheme("Red",R.style.red))

call AddMoreThemes() Method and start Activity

ColorActivity.addMoreThemes(getList())
startActivityForResult(ColorActivity.createIntent(this),121)

If you want to remove default theme

ColorActivity.addMoreThemes(list,false)

If you want to change toolbar title with custom list

ColorActivity.addMoreThemes(list,"Color")

or,

ColorActivity.addMoreThemes(list,false,"Color")

only change toolbar title

ColorActivity.updateToolbarTitle("Color")

want to hide night mode icon

ColorActivity.hideNightModeIcon()

Copyright (c) 2018 Shudipto Trafder

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.