Question

我的传闻使用户能够查阅其公司的声音邮件。通常,当用户把装置放在耳光之前,在电话中,屏幕关闭,以便他们意外地把 but子推向外。在用户聆听其语音邮件时,我要说同样的话。

谁知道如何这样做?

Answer 1

你们看到的是使用近距离传感器。如果有设备,请通过http://developer.android.com/fer/android/hardware/SensorManager.html> rel=“nofollow noretinger”>SensorManager。

Answer 2

如果允许你看看公开源码而不引起 yourself问题,就会检查。具体来说,https://android.googlesource.com/platform/ Packages/apps/Phone/+/refs/heads/jb-dev/src/com/android/phone/PhoneApp.java"rel=“noreferer”>src/com/android/English/Phone/PhoneApp.java

From src/com/android/phone/PhoneApp.java:

 //Around line 519
 // Wake lock used to control proximity sensor behavior.
 if ((pm.getSupportedWakeLockFlags()
          & PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK) != 0x0) {
     mProximityWakeLock = pm.newWakeLock(
         PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK,
         LOG_TAG);
 }

 ....
// Around line 1334
if (((state == Phone.State.OFFHOOK) || mBeginningCall)&& !screenOnImmediately) {
  // Phone is in use!  Arrange for the screen to turn off
  // automatically when the sensor detects a close object.
  if (!mProximityWakeLock.isHeld()) {
      if (DBG) Log.d(LOG_TAG, "updateProximitySensorMode: acquiring...");
      mProximityWakeLock.acquire();
  } else {
      if (VDBG) Log.d(LOG_TAG, "updateProximitySensorMode: lock already held.");
  }
} else {
  // Phone is either idle, or ringing.  We don t want any
  // special proximity sensor behavior in either case.
  if (mProximityWakeLock.isHeld()) {
    if (DBG) Log.d(LOG_TAG, "updateProximitySensorMode: releasing...");
    // Wait until user has moved the phone away from his head if we are
    // releasing due to the phone call ending.
    // Qtherwise, turn screen on immediately
    int flags =
        (screenOnImmediately ? 0 : PowerManager.WAIT_FOR_PROXIMITY_NEGATIVE);
    mProximityWakeLock.release(flags);
  }
}

此外,如果你看上电磁带的代码,ProXIMITY_SCREEN_OFF_WAKE_LOCK就会有文件记载(但隐蔽),并且应当做你想要做的事情(我不肯定的是,这一软件究竟是怎样做的)——但出于某种原因没有列入表格。

/**
 * Wake lock that turns the screen off when the proximity sensor activates.
 * Since not all devices have proximity sensors, use
 * {@link #getSupportedWakeLockFlags() getSupportedWakeLockFlags()} to determine if
 * this wake lock mode is supported.
 *
 * {@hide}
 */
public static final int PROXIMITY_SCREEN_OFF_WAKE_LOCK = WAKE_BIT_PROXIMITY_SCREEN_OFF;

如果你不敢使用潜在的无证特征,那就应该完全满足你们的需要。

Answer 3

如同第21级(Lollipop)一样,你可以紧接:

if(powerManager.isWakeLockLevelSupported(PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK)) {
        PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PROXIMITY_SCREEN_OFF_WAKE_LOCK, TAG);
        wakeLock.setReferenceCounted(false);
        return wakeLock;
    } else {
        return null;
    }
}

那么,这要靠你们来获得和释放。

PS:PowerManager#getSupported WakeLockFlags是隐蔽的,但目前还不存在。他们发明了<代码>isWakeLocklevelSupported。

Answer 4

也许你不需要,但对于对守则感兴趣的人来说,你可以在上看到我的演讲程序。

友情链接