android - 无法将 POJO 写入 Firebase 数据库

Question

我这里有一个简单的 POJO 类:

@IgnoreExtraProperties
public class Poll {

private String Question;
private String Image_URL;

public Poll() {
}

public Poll(String Question, String Image_URL){
    this.Question = Question;
    this.Image_URL = Image_URL;
}


public String getQuestion() {
    return Question;
}

public void setQuestion(String question) {
    Question = question;
}

public String getImage_URL() {
    return Image_URL;
}

public void setImage_URL(String image_URL) {
    Image_URL = image_URL;
     }
}

我正在尝试通过以下方法写入 Firebase，但 Firebase 数据库中没有发生任何事情，因此它没有写入或识别引用。这可能与我的 Firebase/POJO 映射有关，但我无法确定原因:

    mSubmitPollCreation.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

//                //TODO: Need to determine if this is proper epoch - i.e. does it account for time zones
//                Calendar c = Calendar.getInstance();
//                final String epochTime = String.valueOf(c.getTimeInMillis());
//                mEpochRef = mBaseRef.child("Poll").child(epochTime);

                //TODO: Need to check if poll requirements are added, i.e. Question, Answer, ......
                //check if image has been loaded first
                if (resultImageURL != null){
                    Map<String, Object> imageURL = new HashMap<String, Object>();
                    imageURL.put("Image_URL", resultImageURL);
//                    mEpochRef.updateChildren(imageURL);
                } else {
                    Toast.makeText(getApplicationContext(),getResources().getString(R.string.no_image_selected),Toast.LENGTH_LONG).show();
                    return;
                }

                Poll poll = new Poll(mCreatePollQuestion.getText().toString(), resultImageURL);
                        mBaseRef = FirebaseDatabase.getInstance().getReference();

                mBaseRef.child("Polls").push().setValue(poll);
   }

Answer 1

首先查看安全规则，是否开启了写入权限...如果没有开启写入权限...在下面的链接中找到如何设置权限... https://firebase.google.com/docs/database/security/quickstart