在Android中获取不同的通话状态

Question

我正在尝试使用 Java 反射来访问 CallManager 并检测呼叫状态，我总是让呼叫空闲。请帮我解决这个问题。 顺便说一句，我使用以下代码来访问 CallManager：

try{ 
    class classCallManager = class.forname("com.android.internal.telephony.CallManager");
    Method methodGetInstance = classCallManager .getDeclaredMethod("getInstance");
    methodGetInstance.setAccessible(true);
    Object objectCallManager = methodGetInstance.invoke(null);
    Method methodGetActiveFgCallState = classCallManager.getDeclaredMethod("getActiveFgCallState");
}catch (Exception e) {}

Answer 1

我可以确认，不幸的是，即使尝试获取活动的 fg 调用也会失败：返回值始终为 false

    val classCallManagerName = "com.android.internal.telephony.CallManager"

    log log "get class name manager"

    val classCallManager = Class.forName(classCallManagerName)

    future {
      var msec = 15000

      val sleeptime = 500

      while (
        msec > 0
      ) {
        log log "get method instance"

        //getDeclaredMethod
        val methodGetInstance = classCallManager.getMethod("getInstance")

        log log "set method get instance accessible"

        methodGetInstance.setAccessible(true)

        log log "invoke get instance"

        val objectCallManager = methodGetInstance.invoke(null) //null for static methods

        log log "getMethod hasActiveFgCall"

        //getActiveFgCallState
        val hasActiveFgCall = classCallManager.getMethod("hasActiveFgCall")

        log log "hasActiveFgCall setAccessible(true)"

        hasActiveFgCall.setAccessible(true)

        log log "has active fg call: " + hasActiveFgCall.invoke(objectCallManager)

        Thread.sleep(sleeptime)

        msec -= sleeptime
      }
    }

请注意，代码位于 Scala 中