android 呼出电话的监听（去电监听）
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权限：
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS" />
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通过接收呼出电话的广播来实现
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定义广播类
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package com.zhouzijing.android.demo;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.telephony.TelephonyManager;import android.util.Log;public class BroadcastReceiverMgr extends BroadcastReceiver { private final String TAG = MyBroadcastReceiver.TAG; @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); Log.i(TAG, "[Broadcast]"+action); //呼出电话 if(action.equals(MyBroadcastReceiver.B_ACTION_NEW_OUTGOING_CALL)){ String outPhoneNumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER); Log.i(TAG, "[Broadcast]ACTION_NEW_OUTGOING_CALL:"+outPhoneNumber); //this.setResultData(null);//这里可以更改呼出电话号码。如果设置为null，电话就永远不会播出了. } } }?定义activity类
package com.zhouzijing.android.demo;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.telephony.PhoneStateListener;import android.telephony.TelephonyManager;import android.util.Log;import android.view.View;public class MyBroadcastReceiver extends Activity { public final static String TAG = "MyBroadcastReceiver"; public final static String B_ACTION_NEW_OUTGOING_CALL = Intent.ACTION_NEW_OUTGOING_CALL; private BroadcastReceiverMgr mBroadcastReceiver; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.my_broadcast_receiver); } //按钮1-注册广播 public void registerIt(View v) { Log.i(TAG, "registerIt"); mBroadcastReceiver = new BroadcastReceiverMgr(); IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction(Intent.ACTION_NEW_OUTGOING_CALL); intentFilter.setPriority(Integer.MAX_VALUE); registerReceiver(mBroadcastReceiver, intentFilter); } //按钮2-撤销广播 public void unregisterIt(View v) { Log.i(TAG, "unregisterIt"); unregisterReceiver(mBroadcastReceiver); } }??