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[英]How to Pass Data From a BroadcastReceiver to an Activity in Android
[英]Android: Pass value from activity to broadcastreceiver
首先,抱歉我的語法不好。 我正在使用broadcastreceiver開發自動回復消息應用程序我有問題,當我可以從活動接收值到broadcastreceiver時,自動回復將無法正常工作。 但是,如果我沒有從Activity獲得價值,它就會起作用。 這是我的活動代碼,我把它放在onSensorChanged()
Intent i = new Intent("my.action.string");
i.putExtra("apaan", lala);
sendBroadcast(i);
這是我的廣播接收班
public class AutoReply extends BroadcastReceiver{
private static final String SMS_RECEIVED = "android.provider.Telephony.SMS_RECEIVED";
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
Log.i("message", "Broadcast Received: " +action);
if (action.equals(SMS_RECEIVED) && action.equals("my.action.string")) {
Bundle bundle = intent.getExtras();
String state = bundle.getString("apaan");
if (bundle != null) {
Object[] pdus = (Object[]) bundle.get("pdus");
final SmsMessage[] sms = new SmsMessage[pdus.length];
String isiSMS = "", noPengirim = "";
for (int i = 0; i < pdus.length; i++) {
sms[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);
isiSMS = sms[i].getMessageBody();//mengambil isi pesan dari pengirim
noPengirim = sms[i].getOriginatingAddress();//mengambil no pengirim
}
String message = state;//isi balasan autoreplay
SmsManager smsSend = SmsManager.getDefault();
smsSend.sendTextMessage(noPengirim, null, message, null, null);
}
}
}
這是我的表現
<receiver android:name=".AutoReply" android:enabled="true">
<intent-filter>
<action android:name="android.provider.Telephony.SMS_RECEIVED" />
<action android:name="my.action.string" />
</intent-filter>
</receiver>
該動作永遠不會同時是android.provider.Telephony.SMS_RECEIVED
和my.action.string
。
改變這個:
if (action.equals(SMS_RECEIVED) && action.equals("my.action.string")) {
對此:
if (action.equals(SMS_RECEIVED) || action.equals("my.action.string")) {
此外,您不是在手動創建的Intent中發送pdus
,因此當您調用bundle.get("pdus")
,它將返回null。 然后,當您調用pdus.length
,它將拋出NullPointerException。
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