up

app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt

@@ -35,7 +35,6 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
 
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
         sharedPreferences ?: return
-        activity ?: return
         when (key) {
             "colorPrimary", "colorAccent", "colorBackground" ->
                 if (!ColorUtils.isColorLight(
@@ -45,15 +44,20 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
                         )
                     )
                 ) {
-                    AlertDialog.Builder(activity!!)
+                    activity?.let {
+                        AlertDialog.Builder(it)
                             .setTitle("白天背景太暗")
                             .setMessage("将会恢复默认背景？")
                             .setPositiveButton(R.string.ok) { _, _ ->
-                            App.INSTANCE.putPrefInt("colorBackground", App.INSTANCE.getCompatColor(R.color.md_grey_100))
+                                App.INSTANCE.putPrefInt(
+                                    "colorBackground",
+                                    App.INSTANCE.getCompatColor(R.color.md_grey_100)
+                                )
                                 upTheme(false)
                             }
                             .setNegativeButton(R.string.cancel) { _, _ -> upTheme(false) }
                             .show().upTint
+                    }
                 } else {
                     upTheme(false)
                 }
@@ -65,7 +69,8 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
                         )
                     )
                 ) {
-                    AlertDialog.Builder(activity!!)
+                    activity?.let {
+                        AlertDialog.Builder(it)
                             .setTitle("夜间背景太亮")
                             .setMessage("将会恢复默认背景？")
                             .setPositiveButton(R.string.ok) { _, _ ->
@@ -76,7 +81,8 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
                                 upTheme(true)
                             }
                             .setNegativeButton(R.string.cancel) { _, _ -> upTheme(true) }
-                        .show()
+                            .show().upTint
+                    }
                 } else {
                     upTheme(true)
                 }
@@ -87,7 +93,8 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
     override fun onPreferenceTreeClick(preference: Preference?): Boolean {
         when (preference?.key) {
             "defaultTheme" -> {
-                AlertDialog.Builder(activity!!)
+                activity?.let {
+                    AlertDialog.Builder(it)
                         .setTitle("恢复默认主题")
                         .setMessage("是否确认恢复？")
                         .setPositiveButton(R.string.ok) { _, _ ->
@@ -104,8 +111,8 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
                             Handler().postDelayed({ activity?.recreate() }, 100)
                         }
                         .setNegativeButton(R.string.cancel, null)
-                    .show()
-                    .upTint
+                        .show().upTint
+                }
             }
         }
         return super.onPreferenceTreeClick(preference)