replyComment.java

private void replyComment() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    if (mAccessToken == null) {
                        Log.d(TAG, "need to sign in first");
                        return;
                    }
                    if (fileSearched == null) {
                        Log.d(TAG, "query file first");
                        return;
                    }
                    if (mComment == null) {
                        Log.d(TAG, "comment the file first");
                        return;
                    }
                    if (StringUtils.isNullOrEmpty(et_replyComment.getText().toString())) {
                        Log.d(TAG, "comment is required to reply");
                        return;
                    }

                    Drive drive = buildDrive();
                    Reply reply = new Reply();
                    reply.setDescription(et_replyComment.getText().toString());
                    mReply = drive.replies()
                            .create(fileSearched.getId(), mComment.getId(), reply)
                            .setFields("*")
                            .execute();

                    if (mReply != null && mReply.getId() != null) {
                        Log.d(TAG, "reply comment success");
                    } else {
                        Log.d(TAG, "reply comment failed");
                    }
                } catch (Exception e) {
                    Log.d(TAG, "reply comment error", e);
                }
            }
        }).start();
    }