ThemeLite

A Java library for implementing dark theme easily in android apps.

Features

• Easy Implentation;
• Saves the theme even when app restarts.

Implementation

Step 1. Add this in your root build.gradle at the end of repositories:

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

Step 2. Add the dependency

dependencies {
        implementation 'com.github.erliteHq:themelite:1.1.0'
}

Step 3. Duplicate your Values folder in res and rename as "values-night" (ignore the quote marks)

Step 4. In your colors-night xml file, set the corresponding dark theme colors for the colors in the colors xml file.

Step 5. Create a Switch in your layout xml file.

Step 6. Add the following code to your activity.

  @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_###);

        //initialize ThemeLite
      themeLite = new ThemeLite(this);

      //declare
      darkSwitch = findViewById(R.id.darkSwitch);


      //set theme in splash or main activity
        themeLite.setTheme();

        //set switch state dependent on theme
        if (themeLite.getTheme == themeLite.isDark){
            darkSwitch.setChecked(true);
        }

        //switch listener
        darkSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

                if(isChecked){
                    themeLite.setDark();
                } else {
                    themeLite.setLight();
                }

            }
        });


    }

    //save theme for app restart in closing activity
    @Override
    protected void onSaveInstanceState(@NonNull Bundle outState) {
        super.onSaveInstanceState(outState);

        themeLite.saveTheme(this);

    }

et Voila!

Preview

psst..just a tip!

For smooth transitions between light mode and dark mode add this to your styles xml file

//Base Application theme
<style name="AppTheme" parent="Theme.AppCompat.Light.xxx">
...
...
 <item name="android:windowAnimationStyle">@style/WindowAnimationTransition</item>
</style>

<style name="WindowAnimationTransition">
        <item name="android:windowEnterAnimation">@android:anim/fade_in</item>
        <item name="android:windowExitAnimation">@android:anim/fade_out</item>
    </style>

Don't forget to add it to your styles-night file too!

Contribution

Feel free to fork and clone the repo!

Connect

You can reach me via

Twitter: @erliteHq @jesulonimii