Android automatically obtains verification code using ContentObserver method

/**
 * Created by weifeiyang on 2016/7/29 0029.
 */

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/**
  * Read the SMS verification code and set the verification code
  * Created by cool on 2016/1/4.
  */
public class ReadSmsContent extends ContentObserver {
 private Cursor cursor = null;
 private Activity mActivity;
 private EditText mEditText;

 public ReadSmsContent(Handler handler, Activity activity, EditText editText) {
  super(handler);
   = activity;
   = editText;
 }

 @Override
 public void onChange(boolean selfChange, Uri uri) {

 /*
   The first callback is not what we want. Return directly
   It is currently found that every time I receive a new text message, I will go onChange() several times,
   This method can be used to make the method in onChange only go once.
  */
  if (().equals("content://sms/raw")) {
   return;
  }

  /*
    Read text messages in your inbox

    address Sender's mobile number:
    body information content:
    read:
    date Send time:
    */
  cursor = ().query(("content://sms/inbox"),
    new String[]{"_id", "address", "body", "read"}, null, null, "_id desc");//Sort in descending order
// Specify the number//  (("content://sms/inbox"),
//    new String[]{"_id", "address", "body", "read"}, "address=? and read=?", new String[]{"10086", "0"}, "_id desc");

  if (null != cursor && () > 0) {
   ();//Point to the first place   int smsbodyColumn = ("body");//body location   String smsBody = (smsbodyColumn);//Get content   String verifyCode = getDynamicPassword(smsBody);
   if ((verifyCode)) {
    return;
   }
   if (mEditText == null) {
    throw new RuntimeException("The EditText you passed is empty");
   }
   if (("The verification code you got from the server"))) {
    (verifyCode);
    //EditText gets the focus, 3 properties must be set at the same time    (true);
    (true);
    ();
    (());//Set the cursor position   }

  }
  if (!()) {
   ();
  }
 }

 /**
   * Snap 4 consecutive digits from a string
   * Used to get dynamic passwords from text messages
   *
   * @param str SMS content
   * @return The obtained 4-digit dynamic password
   */
 public static String getDynamicPassword(String str) {
  Pattern continuousNumberPattern = ("[0-9\\.]+");
  Matcher m = (str);
  String dynamicPassword = "";
  while (()) {
   if (().length() == 4) {
    dynamicPassword = ();
   }
  }

  return dynamicPassword;
 }
}

 /**
   * Initialize the SMS listening database
   */
 private void initSmSContentObserver() {
  readSmsContent = new ReadSmsContent(new Handler(), this, seCodeEditText);
  //Register SMS content monitoring  ().registerContentObserver(("content://sms/"), true, readSmsContent);

 }