常用的系统广播总结

<pre class="prettyprint prettyprinted"><span class="typ" style="font-family: 'Microsoft YaHei'; font-size: 16px;">Intent<span class="pun">.<span class="pln">ACTION_AIRPLANE_MODE_CHANGED<span class="pun">;<span class="pln"> <span class="com">//关闭或打开飞行模式时的广播<span class="pln"> <span class="str">&lt;strong&gt;<span class="typ">Intent<span class="pun">.<span class="pln">ACTION_BATTERY_CHANGED<span class="pun">;<span class="pln"> <span class="com">//充电状态,或者电池的电量发生变化<span class="pln"> <span class="com">//电池的充电状态、电荷级别改变,不能通过组建声明接收这个广播,只有通过Context.registerReceiver()注册<span class="pln"> <span class="str">&lt;strong&gt;<span class="typ">Intent<span class="pun">.<span class="pln">ACTION_BATTERY_LOW<span class="pun">;<span class="pln"> <span class="com">//表示电池电量低<span class="pln"> <span class="str">&lt;strong&gt;<span class="typ">Intent<span class="pun">.<span class="pln">ACTION_BATTERY_OKAY<span class="pun">;<span class="pln"> <span class="com">//表示电池电量充足,即从电池电量低变化到饱满时会发出广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_BOOT_COMPLETED<span class="pun">;<span class="pln"> <span class="com">//在系统启动完成后,这个动作被广播一次(只有一次)。<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_CAMERA_BUTTON<span class="pun">;<span class="pln"> <span class="com">//按下照相时的拍照按键(硬件按键)时发出的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_CLOSE_SYSTEM_DIALOGS<span class="pun">;<span class="pln"> <span class="com">//当屏幕超时进行锁屏时,当用户按下电源按钮,长按或短按(不管有没跳出话框),进行锁屏时,android系统都会广播此Action消息<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_CONFIGURATION_CHANGED<span class="pun">;<span class="pln"> <span class="com">//设备当前设置被改变时发出的广播(包括的改变:界面语言,设备方向,等,请参考Configuration.java)<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_DATE_CHANGED<span class="pun">;<span class="pln"> <span class="com">//设备日期发生改变时会发出此广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_DEVICE_STORAGE_LOW<span class="pun">;<span class="pln"> <span class="com">//设备内存不足时发出的广播,此广播只能由系统使用,其它APP不可用?<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_DEVICE_STORAGE_OK<span class="pun">;<span class="pln"> <span class="com">//设备内存从不足到充足时发出的广播,此广播只能由系统使用,其它APP不可用?<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_DOCK_EVENT<span class="pun">;<span class="pln"> <span class="com">//<span class="pln"> <span class="com">//发出此广播的地方frameworks\base\services\java\com\android\server\DockObserver.java<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_EXTERNAL_APPLICATIONS_AVAILABLE<span class="pun">;<span class="pln"> <span class="com">////移动APP完成之后,发出的广播(移动是指:APP2SD)<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE<span class="pun">;<span class="pln"> <span class="com">//正在移动APP时,发出的广播(移动是指:APP2SD)<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_GTALK_SERVICE_CONNECTED<span class="pun">;<span class="pln"> <span class="com">//Gtalk已建立连接时发出的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_GTALK_SERVICE_DISCONNECTED<span class="pun">;<span class="pln"> <span class="com">//Gtalk已断开连接时发出的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_HEADSET_PLUG<span class="pun">;<span class="pln"> <span class="com">//在耳机口上插入耳机时发出的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_INPUT_METHOD_CHANGED<span class="pun">;<span class="pln"> <span class="com">//改变输入法时发出的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_LOCALE_CHANGED<span class="pun">;<span class="pln"> <span class="com">//设备当前区域设置已更改时发出的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MANAGE_PACKAGE_STORAGE<span class="pun">;<span class="pln"> <span class="com">//<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_BAD_REMOVAL<span class="pun">;<span class="pln"> <span class="com">//未正确移除SD卡(正确移除SD卡的方法:设置--SD卡和设备内存--卸载SD卡),但已把SD卡取出来时发出的广播<span class="pln"> <span class="com">//广播:扩展介质(扩展卡)已经从 SD 卡插槽拔出,但是挂载点 (mount point) 还没解除 (unmount)<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_BUTTON<span class="pun">;<span class="pln"> <span class="com">//按下"Media Button" 按键时发出的广播,假如有"Media Button" 按键的话(硬件按键)<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_CHECKING<span class="pun">;<span class="pln"> <span class="com">//插入外部储存装置,比如SD卡时,系统会检验SD卡,此时发出的广播?<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_EJECT<span class="pun">;<span class="pln"> <span class="com">//已拔掉外部大容量储存设备发出的广播(比如SD卡,或移动硬盘),不管有没有正确卸载都会发出此广播?<span class="pln"> <span class="com">//广播:用户想要移除扩展介质(拔掉扩展卡)。<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_MOUNTED<span class="pun">;<span class="pln"> <span class="com">//插入SD卡并且已正确安装(识别)时发出的广播<span class="pln"> <span class="com">//广播:扩展介质被插入,而且已经被挂载。<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_NOFS<span class="pun">;<span class="pln"> <span class="com">//<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_REMOVED<span class="pun">;<span class="pln"> <span class="com">//外部储存设备已被移除,不管有没正确卸载,都会发出此广播?<span class="pln"> <span class="com">// 广播:扩展介质被移除。<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_SCANNER_FINISHED<span class="pun">;<span class="pln"> <span class="com">//广播:已经扫描完介质的一个目录<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_SCANNER_SCAN_FILE<span class="pun">;<span class="pln"> <span class="com">//<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_SCANNER_STARTED<span class="pun">;<span class="pln"> <span class="com">//广播:开始扫描介质的一个目录<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_SHARED<span class="pun">;<span class="pln"> <span class="com">// 广播:扩展介质的挂载被解除 (unmount),因为它已经作为 USB 大容量存储被共享。<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_UNMOUNTABLE<span class="pun">;<span class="pln"> <span class="com">//<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_MEDIA_UNMOUNTED <span class="com">// 广播:扩展介质存在,但是还没有被挂载 (mount)。<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_NEW_OUTGOING_CALL<span class="pun">;<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_PACKAGE_ADDED<span class="pun">;<span class="pln"> <span class="com">//成功的安装APK之后<span class="pln"> <span class="com">//广播:设备上新安装了一个应用程序包。<span class="pln"> <span class="com">//一个新应用包已经安装在设备上,数据包括包名(最新安装的包程序不能接收到这个广播)<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_PACKAGE_CHANGED<span class="pun">;<span class="pln"> <span class="com">//一个已存在的应用程序包已经改变,包括包名<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_PACKAGE_DATA_CLEARED<span class="pun">;<span class="pln"> <span class="com">//清除一个应用程序的数据时发出的广播(在设置--应用管理--选中某个应用,之后点清除数据时?)<span class="pln"> <span class="com">//用户已经清除一个包的数据,包括包名(清除包程序不能接收到这个广播)<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_PACKAGE_INSTALL<span class="pun">;<span class="pln"> <span class="com">//触发一个下载并且完成安装时发出的广播,比如在电子市场里下载应用?<span class="pln"> <span class="com">//<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_PACKAGE_REMOVED<span class="pun">;<span class="pln"> <span class="com">//成功的删除某个APK之后发出的广播<span class="pln"> <span class="com">//一个已存在的应用程序包已经从设备上移除,包括包名(正在被安装的包程序不能接收到这个广播)<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_PACKAGE_REPLACED<span class="pun">;<span class="pln"> <span class="com">//替换一个现有的安装包时发出的广播(不管现在安装的APP比之前的新还是旧,都会发出此广播?)<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_PACKAGE_RESTARTED<span class="pun">;<span class="pln"> <span class="com">//用户重新开始一个包,包的所有进程将被杀死,所有与其联系的运行时间状态应该被移除,包括包名(重新开始包程序不能接收到这个广播)<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_POWER_CONNECTED<span class="pun">;<span class="pln"> <span class="com">//插上外部电源时发出的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_POWER_DISCONNECTED<span class="pun">;<span class="pln"> <span class="com">//已断开外部电源连接时发出的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_PROVIDER_CHANGED<span class="pun">;<span class="pln"> <span class="com">//<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_REBOOT<span class="pun">;<span class="pln"> <span class="com">//重启设备时的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_SCREEN_OFF<span class="pun">;<span class="pln"> <span class="com">//屏幕被关闭之后的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_SCREEN_ON<span class="pun">;<span class="pln"> <span class="com">//屏幕被打开之后的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_SHUTDOWN<span class="pun">;<span class="pln"> <span class="com">//关闭系统时发出的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_TIMEZONE_CHANGED<span class="pun">;<span class="pln"> <span class="com">//时区发生改变时发出的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_TIME_CHANGED<span class="pun">;<span class="pln"> <span class="com">//时间被设置时发出的广播<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_TIME_TICK<span class="pun">;<span class="pln"> <span class="com">//广播:当前时间已经变化(正常的时间流逝)。<span class="pln"> <span class="com">//当前时间改变,每分钟都发送,不能通过组件声明来接收,只有通过Context.registerReceiver()方法来注册<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_UID_REMOVED<span class="pun">;<span class="pln"> <span class="com">//一个用户ID已经从系统中移除发出的广播<span class="pln"> <span class="com">//<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_UMS_CONNECTED<span class="pun">;<span class="pln"> <span class="com">//设备已进入USB大容量储存状态时发出的广播?<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_UMS_DISCONNECTED<span class="pun">;<span class="pln"> <span class="com">//设备已从USB大容量储存状态转为正常状态时发出的广播?<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_USER_PRESENT<span class="pun">;<span class="pln"> <span class="com">//<span class="pln"> <span class="typ">Intent<span class="pun">.<span class="pln">ACTION_WALLPAPER_CHANGED<span class="pun">;<span class="pln"> <span class="com">//设备墙纸已改变时发出的广播</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></pre>
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2025-12-25 10:16
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01-28 16:12
中南大学 Java
几年前还没有chatgpt的时候,刷题真的是很痛苦。刷不出来只能看题解,题解有几个问题:第一个是每次看的写题解的人都不一样,很难有一个统一的思路;第二个也是最重要的是,题解只提供了作者自己的思路,但是没有办法告诉你你的思路哪里错了。其实很少有错误的思路,我只是需要被引导到正确的思路上面去。所以传统题解学习起来非常困难,每次做不出来难受,找题解更难受。但是现在chatgpt能做很多!它可以这样帮助你&nbsp;-1.&nbsp;可以直接按照你喜欢的语言生成各种解法的题解和分析复杂度。2.&nbsp;把题和你写的代码都发给它,它可以告诉你&nbsp;你的思路到底哪里有问题。有时候我发现我和题解非常接近,只是有一点点🤏想错了。只要改这一点点就是最优解。信心倍增。3.&nbsp;如果遇到不懂的题解可以一行一行询问为什么要这样写,chatgpt不会嫌你烦。有时候我觉得自己的range写错了,其实那样写也没错,只是chat老师的题解有一点优化,这个它都会讲清楚。4.&nbsp;它可以帮你找可以用同类型解法来做的题。然后它可以保持解法思路不变,用一个思路爽刷一个类型的题。如果题目之间思路又有变化,它会告诉你只有哪里变了,其他的地方还是老思路。5.&nbsp;它也可以直接帮你总结模板,易错点。经过chat老师的指导,我最大的改变是敢刷题了。之前刷题需要先找某一个人写的算法题repo,然后跟着某一个人他的思路刷他给的几个题。如果想写别的题,套用思路失败了,没有他的题解,也不知道到底哪里错了;看别人的题解,思路又乱了。这个问题在二分查找和dp类型的题里面特别常见。但是现在有chat老师,他会针对我的代码告诉我我哪里想错了,应该怎么做;还按照我写代码的习惯帮我总结了一套属于我的刷题模板。每天写题全是正反馈!
明天不下雨了:那我建议可以用 chatgpt atlas 或者 dia 去刷,也可以用 chrome 加个 ai 插件去刷 左边刷题右边 chat 效果很好
AI时代的工作 VS 传...
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