1.创建valuse-night文件夹，设置夜间模式的color
2.修改夜间模式下的主题的样式为：Theme.AppCompat.DayNight.NoActionBar
3.点击控件切换日渐夜间模式 

if(SPUtils.get(this, SPKey.NIGHT,false)as Boolean){
                        SPUtils.put(this, SPKey.NIGHT,false)//                        delegate.localNightMode = AppCompatDelegate.MODE_NIGHT_NO//                        recreate()
                        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO)}else{
                        SPUtils.put(this, SPKey.NIGHT,true)//                        delegate.localNightMode = AppCompatDelegate.MODE_NIGHT_YES//                        recreate()
                        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES)}

4.在基类BaseActivity中给其他页面设置模式进行生效 

@OverrideprotectedvoidonResume(){super.onResume();
        Boolean isNight =(Boolean) SPUtils.get(this, SPKey.NIGHT,false);if(isNight){
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);}else{
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);}}