Simple Theme skin changing function

Effect screenshots

1. Defining properties
First define several attributes that need to be changed, for example:

<!--Skin peeler-->
    <attr name="userNameColor" format="color" />
    <attr name="commonColor" format="color" />
    <attr name="bgColor" format="color" />
    <attr name="itemColor" format="color" />
    <attr name="settingImage" format="reference" />
    <attr name="themeImage" format="reference" />

2. Define a theme in style

    <style name="NightTheme" parent="AppTheme">
        <item name="userNameColor">@color/color_ffffff</item>
        <item name="commonColor">@color/color_68737f</item>
        <item name="bgColor">@color/color_1c232c</item>
        <item name="itemColor">@color/color_181f29</item>
        <item name="settingImage">@mipmap/settings_night</item>
        <item name="themeImage">@mipmap/theme_night</item>
    </style>

    <style name="DayTheme" parent="AppTheme">
        <item name="userNameColor">@color/color_000000</item>
        <item name="commonColor">@color/color_424242</item>
        <item name="bgColor">@color/color_ffffff</item>
        <item name="itemColor">@color/color_ffffff</item>
        <item name="settingImage">@mipmap/settings_day</item>
        <item name="themeImage">@mipmap/theme_day</item>
    </style>

3. Use in layout

<LinearLayout
  android:id="@+id/ll_parent"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:background="?attr/bgColor">

<ListView
  android:id="@+id/lv_choose_project_item"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:divider="@null" />

</LinearLayout>

4, calling in onCreate, you need to call before setContentView, this side with sp, record user favorite theme.

boolean theme = (boolean) SPUtil.getInstance(Const.ConstantSp.SP_THEME_FILE_NAME).get(Const.ConstantSp.SP_THEME_KEY, true);
if (theme ) {
  MainActivity.this.setTheme(R.style.DayTheme);
} else {
  MainActivity.this.setTheme(R.style.NightTheme);
}
setContentView(R.layout.activity_main);

5. Start at the place of switching

finish();
Intent intent = getIntent();
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
overridePendingTransition(0, 0);

summary

Switch themes with Theme:
Advantages: simple implementation and configuration
Disadvantages: it needs to restart the application; it is fixed skin and cannot switch dynamically