我有一个提供 SMS 消息的应用程序。短信数据存储在应用数据库中。该应用程序支持向多个联系人发送消息，因此在发送 SMS 时，我会动态注册一个不同的 BroadcastReceiver 以侦听是否发送了每条 SMS（我使用字符串中的每个电话号码来标识 IntentFilter 中的操作）。
收到确认发送后，我将 SMS 写入数据库。
问题是，如果用户在“已发送”意图被广播之前离开活动，BroadcastReceivers 将丢失，我无法再捕获“已发送”意图，因此数据库不会更新。我选择的一种解决方法是实现 onKeyDown() 以防止用户在所有 Intent 被广播之前关闭活动，但此解决方案仅适用于“返回”按钮 - 无法捕获“主页”按钮事件。
这是我的代码：
public void sendSMS(String[] phoneNumbers, String message){
final String currentMessage = message;
SmsManager sms = SmsManager.getDefault();
ArrayList<String> parts = sms.divideMessage(message);
for(int i=0; i<phoneNumbers.length; i++){
for(int j=0; j<parts.size(); j++){
BroadcastReceiver sent = new BroadcastReceiver(){
public void onReceive(Context arg0, Intent arg1) {
String[] arg = arg1.getAction().split(KEY_SMS_SENT);
String phoneNo = Utils.setSimpleFormatNumber(arg[1]);
String count = arg[0];
String parts = count.split(KEY_SMS_PART_NO)[0];
String partNo = count.split(KEY_SMS_PART_NO)[1];
sentReceivers.remove(this);
unregisterReceiver(this);
switch (getResultCode())
{
case Activity.RESULT_OK:
if(parts.equals(partNo)){
Toast.makeText(getBaseContext(), context.getString(R.string.sms_sent_message),
Toast.LENGTH_SHORT).show();
dbAdapter.createSentSMS(KEY_SMS_TYPE_SENT, phoneNo, currentMessage, Utils.getTimeStamp());
}
break;
case SmsManager.RESULT_ERROR_GENERIC_FAILURE:
if(parts.equals(partNo)){
Toast.makeText(getBaseContext(), context.getString(R.string.sms_generic_failure_message),
Toast.LENGTH_SHORT).show();
dbAdapter.createSentSMS(KEY_SMS_TYPE_FAILED, phoneNo, currentMessage, Utils.getTimeStamp());
}
break;
case SmsManager.RESULT_ERROR_NO_SERVICE:
if(parts.equals(partNo)){
Toast.makeText(getBaseContext(), context.getString(R.string.sms_no_service_message),
Toast.LENGTH_SHORT).show();
dbAdapter.createSentSMS(KEY_SMS_TYPE_FAILED, phoneNo, currentMessage, Utils.getTimeStamp());
}
break;
case SmsManager.RESULT_ERROR_NULL_PDU:
if(parts.equals(partNo)){
Toast.makeText(getBaseContext(), context.getString(R.string.sms_null_pdu_message),
Toast.LENGTH_SHORT).show();
dbAdapter.createSentSMS(KEY_SMS_TYPE_FAILED, phoneNo, currentMessage, Utils.getTimeStamp());
}
break;
case SmsManager.RESULT_ERROR_RADIO_OFF:
if(parts.equals(partNo)){
Toast.makeText(getBaseContext(), context.getString(R.string.sms_radio_off_message),
Toast.LENGTH_SHORT).show();
dbAdapter.createSentSMS(KEY_SMS_TYPE_FAILED, phoneNo, currentMessage, Utils.getTimeStamp());
}
break;
}
}
};
registerReceiver(sent, new IntentFilter(String.valueOf(parts.size()-1) + KEY_SMS_PART_NO + String.valueOf(j) + KEY_SMS_SENT + phoneNumbers[i]));
//I add the BroadcastReceiver-s to a Vector in order to keep track of them
sentReceivers.add(sent);
}
}
//I use an IntentService to do the actual sending
Intent intent = new Intent(context, SMSSendService.class);
intent.putExtra(KEY_SELECTED_PHONE_NUMBERS, phoneNumbers);
intent.putExtra(KEY_SMS_MESSAGE, message);
intent.putExtra(KEY_ACTION, KEY_REQUEST_SEND_SMS);
startService(intent);
}
这是 IntentService 中的代码：
public void sendSMS(String phoneNo, String message, SmsManager sms)
{
ArrayList<String> parts = sms.divideMessage(message);
ArrayList<PendingIntent> sentPIs = new ArrayList<PendingIntent>();
for(int i=0; i<parts.size(); i++){
sentPIs.add(PendingIntent.getBroadcast(context, 0, new Intent(String.valueOf(parts.size()-1) + KEY_SMS_PART_NO + String.valueOf(i) + KEY_SMS_SENT + phoneNo), 0));
}
sms.sendMultipartTextMessage(phoneNo, null, parts, sentPIs, deliveredPIs);
}