为什么有时会调用SMS BroadcastReceiver两次？

Question

我注册了BroadcastReceiver android.provider.Telephony.SMS_RECEIVED.

有时,BroadcastReceiver onReceive在同一条SMS上被调用两次.

这是为什么？

我究竟做错了什么？

private void initSmsReceivers() {
smsReceiver = new SmsReceiver();
getActivity().registerReceiver(smsReceiver,
            new IntentFilter("android.provider.Telephony.SMS_RECEIVED"));
}



public class SmsReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // ---get the SMS message passed in---
        Bundle bundle = intent.getExtras();
        SmsMessage[] msgs = null;
        String str = "";
        if (bundle != null) {
            // ---retrieve the SMS message received---
            Object[] pdus = (Object[]) bundle.get("pdus");
            msgs = new SmsMessage[pdus.length];
            for (int i = 0; i < msgs.length; i++) {
                msgs[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);
                // str += "SMS from " + msgs[i].getOriginatingAddress();
                // str += " :";
                str += msgs[i].getMessageBody().toString();

            }
            // ---display the new SMS message---
            String output = CryptoUtils.decrypt(str);
            Toast.makeText(context, output, Toast.LENGTH_LONG).show();

            try {
                parsemessage(output);
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                Log.e("JSON2", e.toString());
            }

        }
    }
}

Answer 1

我在执行操作之前通过过滤解决了我的问题。在我的情况下，接收器被调用两次，因为我有两个意图过滤器“SMS_DELIVER”和“SMS_RECEIVED”。请参阅下面的示例

在我的清单中

<receiver
        android:name=".SmsReceiver"
        android:exported="true"
        android:permission="android.permission.BROADCAST_SMS" >
        <intent-filter>
            <action android:name="android.provider.Telephony.SMS_DELIVER" />
            <action android:name="android.provider.Telephony.SMS_RECEIVED" />
        </intent-filter>
    </receiver>

广播接收器

public class SmsReceiver extends BroadcastReceiver {
String TAG = "SmsReceiver";
String sender, text;
private static final String ACTION_SMS_NEW = "android.provider.Telephony.SMS_DELIVER";

@Override
public void onReceive(Context context, Intent intent) {
    // ---get the SMS message passed in---
    Bundle bundle = intent.getExtras();
    if (bundle != null) {
        // ---retrieve the SMS message received---
        Object[] pdus = (Object[]) bundle.get("pdus");
        SmsMessage[] msgs = new SmsMessage[pdus.length];
        for (int i = 0; i < msgs.length; i++) {
            msgs[i] = SmsMessage.createFromPdu((byte[]) pdus[i]);

            sender = msgs[i].getOriginatingAddress();
            text += msgs[i].getMessageBody().toString();
            Log.i(TAG, sender + " sender\ntext " + text);
        }
        final String action = intent.getAction();
        Log.d(TAG, "onReceive(context, " + action + ")");
        if (ACTION_SMS_NEW.equals(action)) {

            ContentValues values = new ContentValues();
            values.put("address", sender);
            values.put("body", text);
            context.getContentResolver().insert(
                    Uri.parse("content://sms/inbox"), values);

            MiscMethods.delay(10);
        }
    }

}

}

Answer 2

您可能会以编程方式和 静态方式注册广播接收器。因此，请确保它initSmsReceivers被调用一次，并且在您的清单中您不会重新注册该接收器！

以下是在清单中静态注册短信接收器的方法：

<receiver
            android:name="your.package.SmsReceiver"
            android:exported="true"
            android:permission="android.permission.BROADCAST_SMS" >
            <intent-filter android:priority="999" >
                <action android:name="android.provider.Telephony.SMS_RECEIVED" />
            </intent-filter>
</receiver>