关于 Android 手机状态的 Broadcaster Receiver报错 

当你没有任何电话是，状态是 IDLE ，当接到电话时是 OFFHOOK ，电话结束后返回 IDLE 状态。 下面是具体的处理代码：

@Override public void onCallStateChanged(int state, String incomingNumber) { super.onCallStateChanged(state, incomingNumber);

switch (state) { case TelephonyManager.CALL_STATE_IDLE: // Toast.makeText(context, "Idle", Toast.LENGTH_LONG).show(); if(UDF.phoneState != TelephonyManager.CALL_STATE_IDLE) { //Here you are came from offhook because value of UDF.phoneState != TelephonyManager.CALL_STATE_IDLE //IDLE is calls many times so you have to keep track by a static variable like UDF.phoneState } break; case TelephonyManager.CALL_STATE_OFFHOOK: //Toast.makeText(context, "Idle", Toast.LENGTH_LONG).show(); break; case TelephonyManager.CALL_STATE_RINGING: //Toast.makeText(context, "Idle", Toast.LENGTH_LONG).show(); endCallIfBlocked(incomingNumber); break;

default:
break;

} UDF.phoneState = state; }