android 来电状态

引用：http://blog.csdn.net/shaojie519/article/details/6764737

无论是打电话还是来电，系统广播是会发送相应的消息的，我们可以监听广播获取手机电话状态。

首先在manifest文件中配置自己的BroadcastReceiver，和声明权限。

<receiver android:name=".filter.PhoneStatReceiver">
        <intent-filter>
             <action android:name="android.intent.action.PHONE_STATE"/>
             <action android:name="android.intent.action.NEW_OUTGOING_CALL" />
        </intent-filter>
</receiver>

 <uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
 <uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"></uses-permission>

在自己的BroadcastReceiver中做相应的处理

import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.telephony.TelephonyManager;
import android.util.Log;


public class PhoneStatReceiver extends BroadcastReceiver{

        private static final String TAG = "PhoneStatReceiver";

        private static boolean incomingFlag = false;

        private static String incoming_number = null;

        @Override
        public void onReceive(Context context, Intent intent) {
                //如果是拨打电话
                if(intent.getAction().equals(Intent.ACTION_NEW_OUTGOING_CALL)){
                        incomingFlag = false;
                        String phoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
                        Log.i(TAG, "call OUT:"+phoneNumber);
                }else{
                        //如果是来电
                        TelephonyManager tm =
                            (TelephonyManager)context.getSystemService(Service.TELEPHONY_SERVICE);

                        switch (tm.getCallState()) {
                        case TelephonyManager.CALL_STATE_RINGING:
                                incomingFlag = true;//标识当前是来电
                                incoming_number = intent.getStringExtra("incoming_number");
                                Log.i(TAG, "RINGING :"+ incoming_number);
                                break;
                        case TelephonyManager.CALL_STATE_OFFHOOK:  //存在至少有一个呼叫拨号，活跃，或                                                                    //保留，并没有来电振铃或等待
                                if(incomingFlag){
                                        Log.i(TAG, "incoming ACCEPT :"+ incoming_number);
                                }
                                break;

                        case TelephonyManager.CALL_STATE_IDLE:   //闲置状态
                                if(incomingFlag){
                                        Log.i(TAG, "incoming IDLE");
                                }
                                break;
                        }
                }
        }
}