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android 多次调用PendingIntent.getBroadcast intent数据不更新问题

2018年02月10日 ⁄ 综合 ⁄ 共 4707字 ⁄ 字号 小 中 大 ⁄ 评论关闭

转自：http://www.reasono.com/?p=318

实验环境：

windows 7

Android Developer Tools

Build: v21.1.0-569685

今日在开发一个小app的时候遇到一个问题：

该app需要实现本机发送短信，遂，通过

SmsManager +　PendingIntent.getBroadcast　的方式实现，因为短信队列里包含多个号码，且发送完毕后需要更新发送状态，所以需要在BroadcastReceiver回调中得到发送短信的ＩＤ，大体实现如下（大家也可以参考下具体发送短信的机制）：

1、接收短信发送后的回调函数：

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private

SmsManager sms;
private

BroadcastReceiver sendBroadcastReceiver;
private

BroadcastReceiver deliveryBroadcastReceiver;
public

void
initSmsBroadcast() {
        sms
= SmsManager.getDefault();
        sendBroadcastReceiver
= new

BroadcastReceiver() {
            @Override
            public

void
onReceive(Context _context, Intent _intent) {
                Bundle
b = _intent.getExtras(); 
                Object[]
lstName = b.keySet().toArray(); 
                String
phone_number = "";
                String
sms_id = "";
                for(int

i = 0;
i < lstName.length; i++) 
                { 
                    String
keyName=lstName[i].toString(); 
                    if

(keyName.equals("phone"))
{
                        phone_number
= b.get(keyName).toString();
                    }
                    if

(keyName.equals("sms_id"))
{
                        sms_id
= b.get(keyName).toString();
                    }
                }
                switch

(getResultCode()) {
                case

Activity.RESULT_OK:
                    receiveSmsLog("SEND",
"to:"

+ phone_number + "-
SMS sent success actions");
                    break;
                case

SmsManager.RESULT_ERROR_GENERIC_FAILURE:
                    receiveSmsLog("SEND",
"to:"

+ phone_number + "-
SMS generic failure actions");
                    break;
                case

SmsManager.RESULT_ERROR_RADIO_OFF:
                    receiveSmsLog("SEND",
"to:"

+ phone_number + "-
SMS radio off failure actions");
                    break;
                case

SmsManager.RESULT_ERROR_NULL_PDU:
                    receiveSmsLog("SEND",
"to:"

+ phone_number + "-
SMS null PDU failure actions");
                    break;
                }
            }
        };
        registerReceiver(sendBroadcastReceiver
, new

IntentFilter(SENT_SMS_ACTION));
 
        deliveryBroadcastReceiver
= new

BroadcastReceiver() {
            @Override
            public

void
onReceive(Context _context, Intent _intent) {
                Bundle
b = _intent.getExtras(); 
                Object[]
lstName = b.keySet().toArray(); 
                String
phone_number = "";
                String
sms_id = "";
                for(int

i = 0;
i < lstName.length; i++) 
                { 
                    String
keyName=lstName[i].toString(); 
                    if

(keyName.equals("phone"))
{
                        phone_number
= b.get(keyName).toString();
                    }
                    if

(keyName.equals("sms_id"))
{
                        sms_id
= b.get(keyName).toString();
                    }
                }
                Log.d("sms_id",
sms_id + "");
                receiveSmsLog("DELIVER",
"to:"

+ phone_number + "-
SMS delivered actions");
            }
        };
        registerReceiver(deliveryBroadcastReceiver,
new

IntentFilter(DELIVERED_SMS_ACTION));
    }

2、开始发送短信：

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private

int
pend_times  = 0;
public

void
sendSms(final

int
sms_id, final

String phone_number, String msg_str) {
        Intent
sentIntent    = new

Intent(SENT_SMS_ACTION);
        sentIntent.putExtra("sms_id",
sms_id);
        sentIntent.putExtra("phone",
phone_number);
 
        Intent
deliverIntent = new

Intent(DELIVERED_SMS_ACTION);
        deliverIntent.putExtra("sms_id",
sms_id);
        deliverIntent.putExtra("phone",
phone_number);
        pend_times++;
        PendingIntent
sentPI     = PendingIntent.getBroadcast(this,
pend_times, sentIntent, PendingIntent.FLAG_UPDATE_CURRENT);
        PendingIntent
deliverPI  = PendingIntent.getBroadcast(this,
pend_times, deliverIntent, PendingIntent.FLAG_UPDATE_CURRENT);
 
        if

(msg_str.length() > 70)
{
            ArrayList<String>
msgs = sms.divideMessage(msg_str);
            for

(String msg : msgs) {
                sms.sendTextMessage(phone_number,
null,
msg, sentPI, deliverPI);
            }
        }
else

{
            sms.sendTextMessage(phone_number,
null,
msg_str, sentPI, deliverPI);
        }
    }

开始的时候多次发送短信成功，但是intent中的数据总是第一次传入的数据，其后就不能更新，通过google多次，尽一天的时间得到的结论是：

需要在PendingIntent.getBroadcast函数中设置第4个参数为 PendingIntent.FLAG_UPDATE_CURRENT

即：PendingIntent sentPI     = PendingIntent.getBroadcast(this, 0, sentIntent, PendingIntent.FLAG_UPDATE_CURRENT);

但是我这里还是不能成功，百思不得其解啊。

于是就修改了第二个参数requestCode，即

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private

int
pend_times  = 0;
 
pend_times++;
PendingIntent
sentPI = PendingIntent.getBroadcast(this,
pend_times, sentIntent, PendingIntent.FLAG_UPDATE_CURRENT);

测试通过，哈哈~~。

有的同学还提出修改了requestCode也没起作用，我建议同时修改

PendingIntent intent= PendingIntent.getBroadcast(Context context, int requestCode, Intent intent, int flags)的requestCode 和flags试试，好运~~

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