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如何对小部件的多个实例使用一个首选项活动？

发布于 2024-10-10 00:43:31 字数 147 浏览 0 评论 0原文

我正在开发一个 Android 主屏幕应用程序小部件。

我正在尝试向小部件添加首选项。我可以放置多个小部件。但我想使用动态创建的共享首选项来配置它。

我如何从资源文件中加载首选项，该文件从共享首选项中获取值并更新它？

有什么建议吗？

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凌乱心跳 2024-10-17 00:43:31

问题的关键是如何使用 PreferenceActivity 保存的设置作为参考并创建自己的设置。下面是我使用单个 PreferenceActivity 实现的应用程序小部件的多个实例的多个设置。

private void onExitPreferenceActivity(Context context, int appWidgetId) {
    // Load the user selected settings saved by PreferenceActivity
    final String SETTING_PREFIX = "COLOR";
    final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    final String colorSetting = prefs.getString(SETTING_PREFIX, "");
    // Save the setting of the current widget with widget ID as the postfix
    final SharedPreferences.Editor prefEditor = prefs.edit();
    prefEditor.putString(SETTING_PREFIX + String.valueOf(appWidgetId), colorSetting);
    prefEditor.commit();
}

private void onLoadingWidgetSetting(Context context, int appWidgetId) {
    // Load the setting of a particular widget given a widget ID
    final String SETTING_PREFIX = "COLOR";
    final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    final String colorSetting = prefs.getString(SETTING_PREFIX + String.valueOf(appWidgetId), "");
    // Use the loaded setting
    // ....
}

The key to the problem is to somehow use the setting saved by PreferenceActivity as reference and create your own setting. Below is what I used to achieve having multiple setting for multiple instances of app widget with single PreferenceActivity.

private void onExitPreferenceActivity(Context context, int appWidgetId) {
    // Load the user selected settings saved by PreferenceActivity
    final String SETTING_PREFIX = "COLOR";
    final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    final String colorSetting = prefs.getString(SETTING_PREFIX, "");
    // Save the setting of the current widget with widget ID as the postfix
    final SharedPreferences.Editor prefEditor = prefs.edit();
    prefEditor.putString(SETTING_PREFIX + String.valueOf(appWidgetId), colorSetting);
    prefEditor.commit();
}

private void onLoadingWidgetSetting(Context context, int appWidgetId) {
    // Load the setting of a particular widget given a widget ID
    final String SETTING_PREFIX = "COLOR";
    final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
    final String colorSetting = prefs.getString(SETTING_PREFIX + String.valueOf(appWidgetId), "");
    // Use the loaded setting
    // ....
}

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