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
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<uses-permission android:name="android.permission.process_outgoing_calls"/>
<uses-permission android:name="android.permission.read_phone_state" />
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2：注册广播 要注意事件的级别 （android中的级别-1000~1000）
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<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>
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详细配置请看 androidmanifest.xml
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.zyw.broadcastsendsms"
android:versioncode="1"
android:versionname="1.0" >
<uses-sdk
android:minsdkversion="8"
android:targetsdkversion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/apptheme" >
<activity
android: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>
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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：
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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;
@override
public 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;
}
}
}
/*@override
public 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);
}
}*/
}
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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！