開いているアクティビティのインテントを処理する場合は、PendintIntentを使用できます（以下の完全な手順）。
public class SMSReciver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
final Bundle bundle = intent.getExtras();
try {
if (bundle != null) {
final Object[] pdusObj = (Object[]) bundle.get("pdus");
for (int i = 0; i < pdusObj.length; i++) {
SmsMessage currentMessage = SmsMessage.createFromPdu((byte[]) pdusObj[i]);
String phoneNumber = currentMessage.getDisplayOriginatingAddress();
String senderNum = phoneNumber;
String message = currentMessage.getDisplayMessageBody();
try {
if (senderNum.contains("MOB_NUMBER")) {
Toast.makeText(context,"",Toast.LENGTH_SHORT).show();
Intent intentCall = new Intent(context, MainActivity.class);
intentCall.putExtra("message", currentMessage.getMessageBody());
PendingIntent pendingIntent= PendingIntent.getActivity(context, 0, intentCall, PendingIntent.FLAG_UPDATE_CURRENT);
pendingIntent.send();
}
} catch (Exception e) {
}
}
}
} catch (Exception e) {
}
}
}
マニフェスト：
<activity android:name=".MainActivity"
android:launchMode="singleTask"/>
<receiver android:name=".SMSReciver">
<intent-filter android:priority="1000">
<action android:name="android.provider.Telephony.SMS_RECEIVED"/>
</intent-filter>
</receiver>
onNewIntent：
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
Toast.makeText(this, "onNewIntent", Toast.LENGTH_SHORT).show();
onSMSReceived(intent.getStringExtra("message"));
}
権限：
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.SEND_SMS" />