来电界面与响铃同步问题

由于Google 默认设计中来电铃声一路和UI启动一路是分开跑，通常情形下UI一路的启动要比响铃更耗时间；所以会存在来电界面起来比铃声稍晚的用户体验，尤其是在灭屏时候的来电。下面的Workround方法给出了L版本上对于此问题的优化方案。
Telecom将来电响铃的逻辑屏蔽，InCallPresenter在收到来电消息时，判断当前是否是亮屏状态，如果是亮屏状态，InCall调用底层的方法进行响铃.
如果是黑屏，在收到来电消息的时候，不做响铃操作，在进入到InCallActivity(通话界面)的onResume方法中，调用响铃的方法。

在InCallPresenter.java中，进行以下修改：
a.增加以下引用

import android.os.PowerManager;// Add For synchronize ringer and UI

b. 增加成员

private PowerManager pm = null;
private boolean isInCallActivityStop = false;

c. 增加方法 playIncomingCallRingtone(android.telecom.Call call)

   /**
     * Add For synchronize ringer and UI
     *
     * @param call
     */
    public void playIncomingCallRingtone(android.telecom.Call call){
        Log.i(this, "playIncomingCallRingtone()");
        TelecomAdapter.getInstance().playIncomingCallRingtone(call);
    }

d.增加getPowerManager方法

public PowerManager getPowerManager(){
     if(pm == null){
           pm = (PowerManager)getSystemService(Context.POWER_SERVICE);
     }
      return pm;
}

e. 修改onIncomingCall(Call call)方法

public void onIncomingCall(Call call) {
       Log.i(this, " onIncomingCall set isInCallActivityStop = false ");
       isInCallActivityStop = false;
       InCallState newState = startOrFinishUi(InCallState.INCOMING);
       InCallState oldState = mInCallState
       Log.i(this, "Phone switching state: " + oldState + " -> " + newState);
       mInCallState = newState;
       //begin Add For synchronize ringer and UI
         Log.d(this, "onIncomingCall the screen is on ? ----- " + getPowerManager().isScreenOn());
         if(getPowerManager().isScreenOn()){
                Log.d(this, "onIncomingCall the screen is on!");               
                playIncomingCallRingtone(call.getTelecommCall());
         }
         //end Add For synchronize ringer and UI

       for (IncomingCallListener listener : mIncomingCallListeners) {
           listener.onIncomingCall(oldState, mInCallState, call);
       }
   }

f.

public void setInCallActivityStop (boolean isStop ){
      Log.d(this, " setInCallActivityStop : " + isStop);
      isInCallActivityStop = isStop;
}

g.

public boolean getInCallActivityStop ( ){
      Log.d(this, " getInCallActivityStop: " + isInCallActivityStop);
       return: isInCallActivityStop;
}

2.TelecomAdapter.java中增加方法playIncomingCallRingtone(android.telecom.Call call)

//Add For synchronize ringer and UI

void playIncomingCallRingtone(android.telecom.Call call) {

       if (mPhone != null) {
               Log.d(this, "playIncomingCallRingtone() Call:" + call);
               if (call != null) {
                     call.playIncomingCallRingtone();
               } else {
                     Log.e(this, "error playIncomingCallRingtone, call is null");
               }
       } else {
           Log.e(this, "error playIncomingCallRingtone, mPhone is null");
       }     
   }

3.Call.java(frameworks\base\telecomm\java\android\telecom)增加方法playIncomingCallRingtone()：

 //Add For synchronize ringer and UI
public void playIncomingCallRingtone() {
     mInCallAdapter.playIncomingCallRingtone();
} 

4.InCallAdapter.java(frameworks\base\telecomm\java\android\telecom)增加方法playIncomingCallRingtone()：

   /**
     * Add For synchronize ringer and UI
     *
     */
   public void playIncomingCallRingtone() {
       try {
           mAdapter.playIncomingCallRingtone();
       } catch (RemoteException e) {
       }
   }

5.IInCallAdapter.aidl(frameworks\base\telecomm\java\com\android\internal\telecom)文件中增加接口：void playIncomingCallRingtone();

6.InCallAdapter.java(packages\services\telecomm\src\com\android\server\telecom)

1> 增加静态成员：
      //Add For synchronize ringer and UI
       private static final int MSG_PLAY_INCOMING_RINGTONE = 1008;
 2> InCallAdapterHandler的handleMessage()方法的最后添加：
      case MSG_PLAY_INCOMING_RINGTONE:
            mCallsManager.playIncomingCallRingtone();
       break;
 3> 添加成员方法：
       @Override
       public void playIncomingCallRingtone() {                               
          mHandler.obtainMessage(MSG_PLAY_INCOMING_RINGTONE).sendToTarget();
       }

7.CallsManager.java 中增加方法playIncomingCallRingtone()

//Add For synchronize ringer and UI
public void playIncomingCallRingtone(){
      Log.v(this, "playIncomingCallRingtone()");
      // check whether exist RINGING call.
      for(Call call : mCalls) {
              if(call.getState() == CallState.RINGING) {
                    mRinger.startRingingOrCallWaiting();//修改该方法为Public
                    break;
                }
       }
}

8.Ringer.java（packages\services\telecomm\src\com\android\server\telecom）中修改onForegroundCallChanged()方法如下：

   @Override
   public void onForegroundCallChanged(Call oldForegroundCall, Call newForegroundCall) {
       if (mRingingCalls.contains(oldForegroundCall) ||
               mRingingCalls.contains(newForegroundCall)) {
                 // Add For synchronize ringer and UI
                 Log.v(this, "synchronize onForegroundCallChanged() ");
                 //End
                 //Original code 
                 //updateRinging();
       }
   }

9.InCallactivity.java
a. 增加以下引用

import android.os.PowerManager;// Add For synchronize ringer and UI

b.

protected void onCreate(Bundle icicle) {
       Log.d(this, "onCreate()... this = " + this);
       super.onCreate(icicle);
       ......
       //begin Add For synchronize ringer and UI
       Log.d(this, "AAAscreen is on ? ----- " +InCallPresenter.getInstance().getPowerManager().isScreenOn());
       //end Add For synchronize ringer and UI                       
       Log.d(this, "onCreate(): exit");
   }

c.

protected void onResume() {
    ......
    InCallPresenter.getInstance().lightOnScreenForSmartBook();                           
    //begin Add For synchronize ringer and UI
    final PowerManager pm = InCallPresenter.getInstance().getPowerManager();
    final Call call = CallList.getInstance().getIncomingCall();
    Log.d(this, "onResum:call: " + call);
    if(call != null){
        boolean isInCallActivityStop =     InCallPresenter.getInstance().getInCallActivityStop();
        Log.d(this, "BBBscreen is on ? ----- " + pm.isScreenOn());
        Log.d(this, "BBBscreen call.getState(): " + call.getState() + " isInCallActivityStop: " + isInCallActivityStop);           
        if((call.getState() == Call.State.CALL_WAITING)
        ||((call.getState() == Call.State.INCOMING)&&(pm.isScreenOn() &&           isInCallActivityStop))){
            InCallPresenter.getInstance().playIncomingCallRingtone(call.getTelecommCall());                         
            InCallPresenter.getInstance().setInCallActivityStop(false);                                                                       
        }
    }             
//end Add For synchronize ringer and UI
}

d.

protected void onStop() {
       Log.d(this, "onStop()...");
        ……………
       super.onStop();
       InCallPresenter.getInstance().setInCallActivityStop(true);
}