Android短信验证码监听解决onChange多次调用的方法

先说一句：MIUI请放弃治疗！这里给个传送门：

MIUI通知类短信权限的坑

识别短信验证码并提取还是挺常见的一个需求。所要解决的问题主要有：

1、如何监听

2、如何提取短信中的验证码

3、监听多次调用问题

直接看下面代码吧，很明了。需要注意的点有就是onChange会多次调用。其实打Log就看的出了，收到一条短信会调用两次onChange，Log结果如下：

mUri===content://sms/raw/20
mUri===content://sms/inbox/20

安卓7.0以上系统，点击标记为已读，也会调用一次

mUri===content://sms

收到一条短信都是uri后面都会有确定的一个数字，对应数据库的_id，比如上面的20

public static class SMSCodeObserver extends ContentObserver {
    private Activity mActivity;
    private static final String TAG = "SMSCodeObserver";
    private SMSCodeListener mSMSCodeListener;
    private Uri mUri;

    public void setSMSCodeListener(SMSCodeListener SMSCodeListener) {
      mSMSCodeListener = SMSCodeListener;
    }

    public interface SMSCodeListener {
      void onResult(String code);
    }

    public SMSCodeObserver(Handler handler, Activity activity) {
      super(handler);
      mActivity = activity;
    }


    public void register() {
      mActivity.getContentResolver().registerContentObserver(
          Uri.parse("content://sms/"), true, this);
    }

    public void unRegister() {
      mActivity.getContentResolver().unregisterContentObserver(this);
    }

    @Override
    public void onChange(boolean selfChange, Uri uri) {
      super.onChange(selfChange, uri);
      if (uri == null) {
        mUri = Uri.parse("content://sms/inbox");
      } else {
        mUri = uri;
      }
      if (mUri.toString().contains("content://sms/raw") || mUri.toString().equals("content://sms")) {
        return;
      }
      LogUtils.d(TAG, "mUri===" + mUri.toString());
      AndPermission.with(mActivity)
          .permission(Manifest.permission.READ_SMS)
          .requestCode(100)
          .callback(this)
          .rationale(new RationaleListener() {
            @Override
            public void showRequestPermissionRationale(int requestCode, Rationale rationale) {
              AndPermission.rationaleDialog(mActivity, rationale)
                  .show();
            }
          })
          .start();
    }

    @PermissionYes(100)
    @SuppressWarnings("unused")
    private void getPermissionYes(List<String> grantedPermissions) {
      handleSMS();
    }

    @PermissionNo(100)
    @SuppressWarnings("unused")
    private void getPermissionNo(List<String> deniedPermissions) {
      if (AndPermission.hasPermission(mActivity, Manifest.permission.READ_SMS)) {
        handleSMS();
      } else {
        AndPermission.defaultSettingDialog(mActivity)
            .show();
      }
    }

    private void handleSMS() {

       /* 按照日期倒序排序 */
      Cursor cursor = mActivity.getContentResolver().query(mUri, null, null, null, "date desc");
      if (cursor != null) {
        if (cursor.moveToFirst()) {//游标移动到first位置
          /* 发件人的号码 */
          String address = cursor.getString(cursor.getColumnIndex("address"));
          /* 短信内容 */
          String body = cursor.getString(cursor.getColumnIndex("body"));
          LogUtils.d(TAG, "address:" + address + ",body:" + body);
          if (!body.contains("验证码")) {
            return;
          }

          /* 利用正则提取验证码（根据实际情况修改） */
          String code = getSMSCode(body);
          if (code != null) {
            if (mSMSCodeListener != null) {
              mSMSCodeListener.onResult(code);
            }
            LogUtils.d(TAG, "code:" + code);
          }
        }
        cursor.close();
      }
    }

    private static String getSMSCode(String msg) {
      /*提取正则表达式，需按需修改*/
      Pattern p = Pattern.compile("(?<![0-9])([0-9]{6})(?![0-9])");
      Matcher m = p.matcher(msg);
      if (m.find()) {
        LogUtils.d(TAG, m.group());
        return m.group(0);
      }
      return null;
    }
  }

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