监控Android系统设置值(Monitor Android system settings values)

监控Android系统设置值(Monitor Android system settings values)

我想观看系统设置，并在其值发生变化时收到通知。 Cursor类有一个setNotificationUri方法，听起来不错，但它不起作用，编码它也感到奇怪......这就是我所做的：

// Create a content resolver and add a listener ContentResolver resolver = getContentResolver(); resolver.addStatusChangeListener(ContentResolver.SYNC_OBSERVER_TYPE_SETTINGS | ContentResolver.SYNC_OBSERVER_TYPE_PENDING | ContentResolver.SYNC_OBSERVER_TYPE_ACTIVE, new MyObserver()); // I somehow need to get an instance of Cursor to use setNotificationUri in the next step... Cursor cursor2 = resolver.query(Settings.System.CONTENT_URI, null, null, null, null); // For testing purposes monitor all system settings cursor2.setNotificationUri(resolver, Settings.System.CONTENT_URI);

听众：

public class MyObserver implements SyncStatusObserver { public void onStatusChanged(int which) { Log.d("TEST", "status changed, which = " + which); } }

那么，很明显，听众从来没有被调用过，我无法在logcat中找到具有指定TEST标签的条目）:(为了测试，我在Android设置菜单中手动将亮度设置从手动更改为自动）。 任何暗示我做错了什么？ 任何其他更好的方式来监视Android系统设置？

感谢您的任何提示！

I want to watch a system setting and get notified when its value changes. The Cursor class has a setNotificationUri method which sounded nice, but it doesn't work and coding it also feels strange... Thats what I did:

// Create a content resolver and add a listener ContentResolver resolver = getContentResolver(); resolver.addStatusChangeListener(ContentResolver.SYNC_OBSERVER_TYPE_SETTINGS | ContentResolver.SYNC_OBSERVER_TYPE_PENDING | ContentResolver.SYNC_OBSERVER_TYPE_ACTIVE, new MyObserver()); // I somehow need to get an instance of Cursor to use setNotificationUri in the next step... Cursor cursor2 = resolver.query(Settings.System.CONTENT_URI, null, null, null, null); // For testing purposes monitor all system settings cursor2.setNotificationUri(resolver, Settings.System.CONTENT_URI);

The listener:

public class MyObserver implements SyncStatusObserver { public void onStatusChanged(int which) { Log.d("TEST", "status changed, which = " + which); } }

Well, obviously the listener gets never called, I can't find an entry with the specified TEST tag in logcat ): (For testing I manually changed the brightness setting from manual to automatic in the android settings menu). Any hint what I am doing wrong? Any other, better way to monitor Android system settings?

Thanks for any hint!

最满意答案

这里是它如何完成，很好用： 如何实现呼叫日志的ContentObserver 。 请注意，当用户在系统首选项屏幕中按下后退键时，某些设置会首先被写入/重新更改！

here is how it can be done, works great: How to implement a ContentObserver for call logs. note than some settings are first written / reallly changed when the user presses the back key in the system preference screen where he changed something!