75 lines
2.3 KiB
Java
75 lines
2.3 KiB
Java
package com.example.livestreaming;
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import android.content.Context;
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import android.content.SharedPreferences;
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import com.google.android.material.badge.BadgeDrawable;
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import com.google.android.material.bottomnavigation.BottomNavigationView;
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public class UnreadMessageManager {
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private static final String PREFS_NAME = "unread_messages";
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private static final String KEY_UNREAD_COUNT = "unread_count";
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/**
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* 获取总未读消息数量
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*/
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public static int getUnreadCount(Context context) {
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SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
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return prefs.getInt(KEY_UNREAD_COUNT, 0);
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}
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/**
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* 设置总未读消息数量
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*/
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public static void setUnreadCount(Context context, int count) {
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SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
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prefs.edit().putInt(KEY_UNREAD_COUNT, Math.max(0, count)).apply();
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}
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/**
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* 增加未读消息数量
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*/
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public static void incrementUnreadCount(Context context, int increment) {
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int current = getUnreadCount(context);
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setUnreadCount(context, current + increment);
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}
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/**
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* 减少未读消息数量
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*/
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public static void decrementUnreadCount(Context context, int decrement) {
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int current = getUnreadCount(context);
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setUnreadCount(context, Math.max(0, current - decrement));
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}
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/**
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* 更新底部导航栏的消息徽章
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*/
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public static void updateBadge(BottomNavigationView bottomNav) {
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if (bottomNav == null) return;
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Context context = bottomNav.getContext();
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int unreadCount = getUnreadCount(context);
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BadgeDrawable badge = bottomNav.getOrCreateBadge(R.id.nav_messages);
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if (unreadCount > 0) {
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badge.setVisible(true);
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badge.setNumber(unreadCount);
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// BadgeDrawable 会自动处理超过 99 的情况，显示 "99+"
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} else {
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badge.setVisible(false);
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badge.clearNumber();
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}
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}
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/**
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* 清除未读消息数量（当用户进入消息页面时）
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*/
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public static void clearUnreadCount(Context context) {
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setUnreadCount(context, 0);
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}
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}
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