保存数据从CSV到境界

Question

我一直在创造一个字典应用程序，我已经保存在的.csv文件所有单词
当应用程序在运行第一次，这种方法应该保存所有的话境界分贝，但只有节约少数。

任务java.util.concurrent.FutureTask@286858df从io.realm.internal.async.RealmThreadPoolExecutor@273caff5 [拒绝运行，池大小= 13，活动线程= 13，队列任务= 100，已完成的任务= 1]

realm = Realm.getDefaultInstance(); 



    //adding to db satrt 
    if (!(realm.isEmpty())) { 
     Log.v("DB","already there!!"); 
    } else { 
     Log.v("DB","Not Found!!"); 
     String csvFile = "longevity.csv"; 
     BufferedReader br = null; 
     String line = ""; 
     String cvsSplitBy = ","; 

     try { 

      br = new BufferedReader(new InputStreamReader(getAssets().open(csvFile))); 
      while ((line = br.readLine()) != null) { 

       // use comma as separator 
       final String[] oneWord= line.split(cvsSplitBy); 



       realm.executeTransactionAsync(new Realm.Transaction() { 
        @Override 
        public void execute(Realm bgRealm) { 
         Word user = bgRealm.createObject(Word.class); 
         user.setWord(oneWord[1]); 
         user.setMeaning(oneWord[2]); 
         user.setSynonyms(oneWord[3]); 
        } 
       }, new Realm.Transaction.OnSuccess() { 
        @Override 
        public void onSuccess() { 
         Log.v("TAGGED","SAVED"); 
        } 
       }, new Realm.Transaction.OnError() { 
        @Override 
        public void onError(Throwable error) { 
         Log.v("TAGGED","FAILED"); 
        } 
       }); 
      } 

     } catch (FileNotFoundException e) { 
      e.printStackTrace(); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } finally { 
      if (br != null) { 
       try { 
        br.close(); 
       } catch (IOException e) { 
        e.printStackTrace(); 
       } 
      } 
     } 

    } 

有出货预填充Relam数据库与Android更好的办法， 我有146800分的话时保存应用程序正在运行第一次，这种方法只保存几句话然后给错误分贝以上显示！

Answer 1

使用1次交易而不是146800次交易。另请考虑使用1个实例保存您的Realm对象，而不是创建146800个对象。

realm.executeTransactionAsync(new Realm.Transaction() { 
     @Override 
     public void execute(Realm bgRealm) { 
      String csvFile = "longevity.csv"; 
      BufferedReader br = null; 
      String line = ""; 
      String cvsSplitBy = ","; 
      try { 
       br = new BufferedReader(new InputStreamReader(getAssets().open(csvFile))); 
       Word user = new Word(); 
       while((line = br.readLine()) != null) { 
        // use comma as separator 
        final String[] oneWord = line.split(cvsSplitBy); 
        user.setWord(oneWord[1]); 
        user.setMeaning(oneWord[2]); 
        user.setSynonyms(oneWord[3]); 
        bgRealm.insert(user); 
       } 
      } catch(Throwable e) { 
       e.printStackTrace(); 
       throw e; 
      } finally { 
       if(br != null) { 
        try { 
         br.close(); 
        } catch(IOException e) { 
         e.printStackTrace(); 
        } 
       } 
      } 
     } 
    }, new Realm.Transaction.OnSuccess() { 
     @Override 
     public void onSuccess() { 
      Log.v("TAGGED", "SAVED"); 
     } 
    }, new Realm.Transaction.OnError() { 
     @Override 
     public void onError(Throwable error) { 
      Log.v("TAGGED", "FAILED"); 
     } 
    }); 

编辑：你应该考虑使用CSV parser library，因为String.split()是内存密集型。

代替

while ((line = br.readLine()) != null) { 

考虑这个

final CSVParser parser = new CSVParser(reader, CSVFormat.EXCEL.withHeader()); 
for (final CSVRecord record : parser) { 
    ...