IOS automatically obtains SMS verification code

1. Custom listener class

/**
*SMS** for autofill verification codes
*/
public class SMSContentObserver extends ContentObserver {

    public final String SMS_URI_INBOX = "content://sms/inbox";//Inbox
    private Activity activity = null;
    private String smsContent = "";//Verification code
    private EditText verifyText = null;//Verification code edit box
    private String SMS_ADDRESS_PRNUMBER = "10690329013589";//SMS provider
    private String smsID = "";
    //When the SMS observer receives a SMS, the onchange method will be executed twice, so compare the SMS IDs, and if they are consistent, they will not be processed.
    public SMSContentObserver(Activity activity, Handler handler, EditText verifyText) {
        super (handler);
        this.activity = activity;
        this.verifyText = verifyText;
    }

    @Override
    public void onChange(boolean selfChange) {
        super.onChange(selfChange);
        Cursor cursor = null;// cursor
        // Read text messages from the specified number in the inbox
        cursor = activity.getContentResolver().query(Uri.parse(SMS_URI_INBOX),
            new String[]{"_id", "address", "body", "read"}, //Attribute to be read
            "address=? and read=?", //What is the query condition
            new String[]{SMS_ADDRESS_PRNUMBER, "0"},//Query condition assignment
            "date desc");//sort

        if (cursor != null) {
            cursor.moveToFirst();
            if (cursor.moveToFirst()) {
                //Compare to see if the ID of the last received SMS is equal
                if (!smsID.equals(cursor.getString(cursor.getColumnIndex("_id")))) {
                    String smsbody = cursor.getString(cursor.getColumnIndex("body"));
                    // Match the verification code with a regular expression
                    Pattern pattern = Pattern.compile("[0-9]{6}");
                    Matches matches = pattern.matcher (smsbody);
                    if (matcher.find()) {//match to 6-digit verification code
                        smsContent = matcher.group();
                        if (verifyText != null && null != smsContent && !"".equals(smsContent)) {
                            verifyText.requestFocus();//Get the focus
                            verifyText.setText(smsContent);//Set the text
                            verifyText.setSelection(smsContent.length());//Set the cursor position
                        }
                    }
                    smsID = cursor.getString(cursor.getColumnIndex("_id"));
                }
            }
        }

    }

}

2. Event listener class on login page

//Instantiate SMS**
SMSContentObserver mObserver = new SMSContentObserver(getActivity(), new Handler(), mEt_auth_code);
// Register SMS change listener
mContext.getContentResolver().registerContentObserver(Uri.parse("content://sms/"), true, mObserver);

3. Declare permission to read SMS messages

<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.READ_SMS" />
<uses-permission android:name="android.permission.WRITE_SMS" />

4. In order to prevent memory leaks, remember to log out of the monitor

@Override
public void onDestroy() {
super.onDestroy ();
   //log out SMS monitor     
   mContext.getContentResolver().unregisterContentObserver(mObserver);
}

Summary:
Going to the SMS library to get text messages is less likely to be intercepted