AlarmManager 的唤醒类型

AlarmManager.RTC，硬件闹钟，不唤醒手机（也可能是其它设备）休眠；当手机休眠时不发射闹钟。AlarmManager.RTC_WAKEUP，硬件闹钟，当闹钟发躰时唤醒手机休眠；AlarmManager.ELAPSED_REALTIME，真实时间流逝闹钟，不唤醒手机休眠；当手机休眠时不发射闹钟。AlarmManager.ELAPSED_REALTIME_WAKEUP，真实时间流逝闹钟，当闹钟发躰时唤醒手机休眠；

具体源码

xref: /frameworks/base/core/java/android/app/AlarmManager.java

83public class AlarmManager {84    private static final String TAG = "AlarmManager";8586    /**87     * Alarm time in {@link System#currentTimeMillis System.currentTimeMillis()}88     * (wall clock time in UTC), which will wake up the device when89     * it goes off.90     */91    public static final int RTC_WAKEUP = 0;92    /**93     * Alarm time in {@link System#currentTimeMillis System.currentTimeMillis()}94     * (wall clock time in UTC).  This alarm does not wake the95     * device up; if it goes off while the device is asleep, it will not be96     * delivered until the next time the device wakes up.97     */98    public static final int RTC = 1;99    /**100     * Alarm time in {@link android.os.SystemClock#elapsedRealtime101     * SystemClock.elapsedRealtime()} (time since boot, including sleep),102     * which will wake up the device when it goes off.103     */104    public static final int ELAPSED_REALTIME_WAKEUP = 2;105    /**106     * Alarm time in {@link android.os.SystemClock#elapsedRealtime107     * SystemClock.elapsedRealtime()} (time since boot, including sleep).108     * This alarm does not wake the device up; if it goes off while the device109     * is asleep, it will not be delivered until the next time the device110     * wakes up.111     */112    public static final int ELAPSED_REALTIME = 3

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