需要通话界面响应改动的两大类情况
1.InCallServiceImpl继承InCallService重写几个重要方法(由这些方法通知InCallPresent,再由InCallPresent通知其它Present)
public void onCallAudioStateChanged(CallAudioState audioState)
public void onBringToForeground(boolean showDialpad)
public void onCallAdded(Call call)
public void onCallRemoved(Call call)
public void onCanAddCallChanged(boolean canAddCall)
public IBinder onBind(Intent intent)
public boolean onUnbind(Intent intent)
2.InCallUI的Call.java文件实现并注册的android.telecom.Call.Callback()(如果是VideoCall,还有VideoCall.Callback)
public void onStateChanged(Call call, int state)
public void onParentChanged(Call call, Call parent)
public void onChildrenChanged(Call call, List<Call> children)
public void onDetailsChanged(Call call, Call.Details details)
public void onCannedTextResponsesLoaded(Call call, List&