重写主题系统

app/src/main/java/io/legato/kazusa/lib/prefs/ThemeModePreference.kt

@@ -0,0 +1,79 @@
+package io.legato.kazusa.lib.prefs
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.preference.PreferenceViewHolder
+import com.google.android.material.button.MaterialButtonToggleGroup
+import io.legato.kazusa.R
+import androidx.core.content.withStyledAttributes
+
+
+class ThemeModePreference(context: Context, attrs: AttributeSet) : Preference(context, attrs) {
+
+    private var currentValue: String? = null
+    private var isBottomBackground: Boolean = false
+
+    init {
+        layoutResource = R.layout.view_pref
+        widgetLayoutResource = R.layout.view_theme_mode
+        context.withStyledAttributes(attrs, R.styleable.Preference) {
+            isBottomBackground = getBoolean(R.styleable.Preference_isBottomBackground, false)
+        }
+    }
+
+    override fun onBindViewHolder(holder: PreferenceViewHolder) {
+        super.onBindViewHolder(holder)
+
+        val toggleGroup = holder.itemView.findViewById<View>(R.id.theme_toggle_group)
+        if (toggleGroup == null) {
+            val rootView = holder.itemView as ViewGroup
+            val inflater = LayoutInflater.from(context)
+            val themeToggleView = inflater.inflate(R.layout.view_theme_mode, rootView, false)
+            rootView.addView(themeToggleView)
+
+            setupToggleGroup(themeToggleView.findViewById(R.id.theme_toggle_group))
+        }
+    }
+
+    private fun setupToggleGroup(toggleGroup: MaterialButtonToggleGroup) {
+
+        when (currentValue) {
+            "0" -> toggleGroup.check(R.id.btn_system)
+            "1" -> toggleGroup.check(R.id.btn_light)
+            "2" -> toggleGroup.check(R.id.btn_dark)
+        }
+
+        // 监听选择变化
+        toggleGroup.addOnButtonCheckedListener { group, checkedId, isChecked ->
+            if (isChecked) {
+                val newValue = when (checkedId) {
+                    R.id.btn_system -> "0"
+                    R.id.btn_light -> "1"
+                    R.id.btn_dark -> "2"
+                    else -> null
+                }
+
+                if (newValue != null && callChangeListener(newValue)) {
+                    currentValue = newValue
+                    persistString(newValue)
+                }
+            }
+        }
+    }
+
+    override fun onSetInitialValue(defaultValue: Any?) {
+        super.onSetInitialValue(defaultValue)
+        currentValue = getPersistedString(defaultValue as? String ?: "0")
+    }
+
+    fun getDefaultValue(): Any {
+        return "0"
+    }
+
+    override fun shouldDisableDependents(): Boolean {
+        return currentValue == null || super.shouldDisableDependents()
+    }
+}