首先我们来理解下监听器的机制。
android的事件处理机制有两种：监听和回调。
a基于监听的事件处理
主要涉及三类对象：eventsource（事件源），event（事件），eventlistener（事件监听器）
监听机制处理事件的流程图如下（委派式：delegation）：
1：需要在androidmanifest.xml清单中添加权限
|
1
2
|
<uses-permission android:name="android.permission.process_outgoing_calls"/><uses-permission android:name="android.permission.read_phone_state" /> |
2：注册广播 要注意事件的级别 （android中的级别-1000~1000）
|
1
2
3
4
5
6
|
<receiver android:name=".phonebroadcastreceiver"><intent-filter android:priority="1000"><action android:name="android.intent.action.new_outgoing_call"/><action android:name="android.intent.action.phone_state"/> </intent-filter></receiver> |
详细配置请看 androidmanifest.xml
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
<manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.zyw.broadcastsendsms"android:versioncode="1"android:versionname="1.0" ><uses-sdkandroid:minsdkversion="8"android:targetsdkversion="15" /><applicationandroid:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/apptheme" ><activityandroid:name=".sendsms"android:label="@string/title_activity_send_sms" ><intent-filter><action android:name="android.intent.action.main" /><category android:name="android.intent.category.launcher" /></intent-filter></activity><receiver android:name=".phonebroadcastreceiver"><intent-filter android:priority="1000"><action android:name="android.intent.action.new_outgoing_call"/><action android:name="android.intent.action.phone_state"/> </intent-filter></receiver></application><uses-permission android:name="android.permission.process_outgoing_calls"/><uses-permission android:name="android.permission.read_phone_state" /></manifest> |
3：编写广播的实现类 这里需要继承broadcastreceiver 实现onreceive()方法
程序的源代码如下：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
package com.zyw.broadcastsendsms;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 phonebroadcastreceiver extends broadcastreceiver {private static final string tag = "message";private static boolean mincomingflag = false;private static string mincomingnumber = null;@overridepublic void onreceive(context context, intent intent) {// 如果是拨打电话if (intent.getaction().equals(intent.action_new_outgoing_call)) {mincomingflag = false;string phonenumber = intent.getstringextra(intent.extra_phone_number);log.i(tag, "call out:" + phonenumber);} else {// 如果是来电telephonymanager tmanager = (telephonymanager) context.getsystemservice(service.telephony_service);switch (tmanager.getcallstate()) {case telephonymanager.call_state_ringing:mincomingnumber = intent.getstringextra("incoming_number");log.i(tag, "ringing :" + mincomingnumber);break;case telephonymanager.call_state_offhook:if (mincomingflag) {log.i(tag, "incoming accept :" + mincomingnumber);}break;case telephonymanager.call_state_idle:if (mincomingflag) {log.i(tag, "incoming idle");}break;}}}/*@overridepublic void onreceive(context context, intent intent) {string number = getresultdata();if("5556".equals(number)){setresultdata(null);//挂断}else{number = "12593"+ number; //其他，则加区号setresultdata(number);}}*/} |
以上内容给大家介绍了android广播接收实现监听电话状态（电话的状态，拦截）的相关知识，希望对大家有所帮助！
