Question

基本上，我想获取一个字符串变量，然后检查我的Firebase数据库节点之一，以查看该字符串的子代是否存在，如果存在，我希望将特定于该字符串的值添加到我的数据库中，但是执行不会一个接一个地执行，循环不会总是等待整个检查字符串是否在数据库中作为子代存在，它有时会跳过它，因此应该添加的值并不全都是被添加

我正在

上在单独的线程上运行此操作

      count = i;
        Elements mShowUpdateName = doc.select("div[class=data main]").select("b").eq(i);
        mUpdateName = mShowUpdateName.text();


        Elements mShowEpisodeDate = doc.select("div[class=data main]").eq(i);
        mEpisodeDate = mShowEpisodeDate.text();


        int startIndex = mUpdateName.indexOf("-");

        mSeriesName = mEpisodeDate.substring(0,startIndex-1);
        Log.e("child" , mSeriesName);


        usersTVSeriesRef.addValueEventListener(new ValueEventListener() {


            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                String mString = mSeriesName.replace(".", "");
                if(dataSnapshot.hasChild(mString)){

                    int first = mEpisodeDate.indexOf("-");
                    int second = mEpisodeDate.indexOf("-", first + 1);

                    String season = mEpisodeDate.substring(first+1, second);


                    second = mEpisodeDate.indexOf("-", first + 1);
                    int last = mEpisodeDate.lastIndexOf("-");

                    String episode = mEpisodeDate.substring(second+1, last);

                    int startIndexDate = mEpisodeDate.indexOf("[");
                    int endIndexDate = mEpisodeDate.lastIndexOf("]");
                    String date = mEpisodeDate.substring(startIndexDate +1 , endIndexDate);


                    HashMap<String, Object> showsMap = new HashMap<>();

                    showsMap.put("date" , date);
                    showsMap.put("episode" , episode);
                    showsMap.put("season", season);
                    showsMap.put("string", mEpisodeDate);

                    showsMap.put("index", Integer.toString(count));
                    showsMap.put("name", mSeriesName);


                    updateRef.child(mString).child(episode).updateChildren(showsMap);

                    }
                else {
                    Log.e("no", "no new updates");
                    Log.e("no", mSeriesName);
                }
            }

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

            }

        });

我希望它始终检查数据库中是否存在该值，然后相应地执行

当前日志为

E/loop: Step 1. String: Will And Grace
E/loop: Step 1. String: The Grand Tour
E/loop: Step 1. String: The Good Fight
E/loop: Step 1. String: Hanna
E/loop: Step 1. String: What We Do in the Shadows
E/loop: Step 2. checking if the value exists in the database
    Step 3. value doesn't exist
    Step 2. checking if the value exists in the database
E/loop: Step 3. value doesn't exist
    Step 2. checking if the value exists in the database
    Step 3. value doesn't exist
E/loop: Step 1. String: Jane The Virgin
E/loop: Step 2. checking if the value exists in the database
E/loop: Step 3. adding value to database
E/loop: Step 1. String: Chicago PD
E/loop: Step 2. checking if the value exists in the database
E/loop: Step 3. adding value to database
E/loop: Step 2. checking if the value exists in the database
E/loop: Step 3. adding value to database
E/loop: Step 2. checking if the value exists in the database
E/loop: Step 3. adding value to database

我想要的是始终遵循第1、2、3步

E/loop: Step 1. String: Chicago Med
E/loop: Step 2. checking if the value exists in the database
E/loop: Step 3. adding value to database
E/loop: Step 1. String: Chicago Fire
E/loop: Step 2. checking if the value exists in the database
E/loop: Step 3. adding value to database
E/loop: Step 1. String: MotherFatherSon
E/loop: Step 2. checking if the value exists in the database
E/loop: Step 3. value doesn't exist

如何修复Android Studio中循环中跳过进程的问题

0 个答案: