BroadcastReceiver学习

一、使用系统广播。以监听电话状态为例

1、写一个类继承自BroadcastReceiver类

 1 package com.diysoul.android.blacklist.receivers;
 2 
 3 import android.app.Service;
 4 import android.content.BroadcastReceiver;
 5 import android.content.Context;
 6 import android.content.Intent;
 7 import android.telephony.TelephonyManager;
 8 import android.util.Log;
 9 
10 public class IncomingcallReceiver extends BroadcastReceiver {
11 
12     private static final String TAG = "IncomingcallReceiver";
13 
14     private boolean incomingFlag = false;
15     private String incoming_number = null;
16     
17     @Override
18     public void onReceive(Context context, Intent intent) {
19         Log.v(TAG, "onReceive,Action:" + intent.getAction());
20 
21         // 如果是拨打电话
22         if (intent.getAction().equals(Intent.ACTION_NEW_OUTGOING_CALL)) {
23             incomingFlag = false;
24             String phoneNumber = intent
25                     .getStringExtra(Intent.EXTRA_PHONE_NUMBER);
26             Log.i(TAG, "call OUT:" + phoneNumber);
27         } else {
28             // 如果是来电
29             TelephonyManager tm = (TelephonyManager) context
30                     .getSystemService(Service.TELEPHONY_SERVICE);
31 
32             switch (tm.getCallState()) {
33             case TelephonyManager.CALL_STATE_RINGING:
34                 incomingFlag = true;// 标识当前是来电
35                 incoming_number = intent.getStringExtra("incoming_number");
36                 Log.i(TAG, "RINGING :" + incoming_number);
37                 break;
38             case TelephonyManager.CALL_STATE_OFFHOOK:
39                 if (incomingFlag) {
40                     Log.i(TAG, "incoming ACCEPT :" + incoming_number);
41                 }
42                 break;
43 
44             case TelephonyManager.CALL_STATE_IDLE:
45                 if (incomingFlag) {
46                     Log.i(TAG, "incoming IDLE");
47                 }
48                 break;
49             }
50         }
51     }
52 }

2、配置AndroidManifest.xml

1 <receiver android:name="com.diysoul.android.blacklist.receivers.IncomingcallReceiver">
2             <intent-filter>
3                 <action android:name="android.intent.action.PHONE_STATE" />
4             </intent-filter>
5         </receiver>

3、配置系统权限

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

二、自定义广播事件

1.发送广播

1             Intent intent = new Intent();
2             //自定义一个广播动作。
3             intent.setAction(action);
4             //发送无序广播，所有接收都都可以收到，不可拦截或修改
5             sendBroadcast(intent);
6             //发送有序广播，可以被拦截或修改，也可以被终止
7             sendOrderedBroadcast(intent, receiverPermission);
8             sendOrderedBroadcast(intent, receiverPermission, resultReceiver, scheduler, initialCode, initialData, initialExtras);

2.接收广播放的类，修改或终止广播，只针对有序广播。对于无序广播，会报异常，将不会执行相应的功能。

1             //修改广播数据
2             setResultData(data);
3             setResultExtras(extras);
4             //终止继续发送广播，低优先级或同优先级但后部署的应用将不能收到
5             //有一种例外是resultReceiver指定的对象仍可收到消息，但前面的应用若修改后，即使收到也是修改后的数据
6             abortBroadcast();

3.接收广播放的类，配置AndroidManifest.xml

1 //设置优先级priority的值 -1000 ~ 1000 数值级别相同，则先安装的应用先收到。同一个应用中，先声明的receiver先收到
2             <receiver android:name="CLASSNAME" >
3             <intent-filter android:priority="100" >
4                 <action android:name="ACTION" />
5             </intent-filter>

代码养活自己