我正在尝试在按钮单击的子项中创建一个随机键，并在该键中插入数据

但当我点击这个按钮时，它会创建多个具有相同数据的键，并且一直持续到我在后台关闭应用程序为止

上面的问题是在postreview()方法中，在我的代码中，我在按钮clcik上调用这个方法

  
    public class DisplayStory extends AppCompatActivity {
    TextView Tittle;
    WebView webView;
    String story;
    String storyname;
    String catagory;
    String TAG = "display";
    DatabaseReference storyref;
    DatabaseReference ratingref;
    RatingObject ratingObject;
    // review stuff
    RatingBar user_ratingBar;
    EditText comment_EditText;
    EditText senderName_editText;
    Button submit;




    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_display_story);
        Tittle = findViewById(R.id.TITLE);
        webView = findViewById(R.id.webview);
        // review stuff
        user_ratingBar = findViewById(R.id.ratings_to_submit);
        comment_EditText = findViewById(R.id.comment_to_submit);
        senderName_editText = findViewById(R.id.sender_name);
        submit = findViewById(R.id.submit_btn);

        storyname = getIntent().getStringExtra("tittle");
        catagory = getIntent().getStringExtra("catagory");

        Log.d(TAG,"storyname "+storyname);
        Log.d(TAG,"storyname "+catagory);

        Tittle.setText(storyname);
        storyref = FirebaseDatabase.getInstance().getReference(catagory).child(storyname);
        ratingref = FirebaseDatabase.getInstance().getReference(catagory).child(storyname).child("rating");
        submit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                PostReview();
            }
        });


        storyref.child("story").addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                if (dataSnapshot.exists()){
                    story = dataSnapshot.getValue().toString();
                    webView.loadData(story,"text/html", "UTF-8");
                    webView.getSettings().setBuiltInZoomControls(true);
                    webView.getSettings().setDisplayZoomControls(false);
                    Log.d(TAG,"story exist ");
                    Log.d(TAG,"story "+story);

                }
                else {
                    Log.d(TAG,"no story exist ");

                }



            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });




    }

    public void PostReview(){
        final String name,comment;
        final float rating;
        name = senderName_editText.getText().toString();
        comment = comment_EditText.getText().toString();
        rating = user_ratingBar.getRating();
        ratingref.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                 ratingObject =
                        new RatingObject(name,comment,rating);
                ratingref.push().setValue(ratingObject);



            }

            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {

            }
        });

    }

}