Question

现在我从EditText MainActivity中提取一个值，并将其作为字符串放在sharedpref中。在后来的活动中，我收到了这个值，并试图将它添加到一个正在增长的数组的末尾。要将Array存储在稍后的活动中以便稍后接收以继续添加，我使用了JSON数组。因此，基本上我在计数器为0时创建一个字符串数组（用户自清理后首先输入）并从MainActivity EditText接收字符串值并将其作为字符串数组中的第一个值添加，然后将其存储为JSON数组。当我稍后收到它（当计数器大于0时）并将其转换回字符串数组时，我的TextView中对于数组中任何给定位置的outPut是[L.java.lang.String; @ 42a5e438，。下面是我的代码，如果coutner == 0和counter＆gt; 0;有谁知道解决方案是什么？ int placeCounterExplanation = pref.getInt（＆＃34; placeCounterExplanation＆＃34;，0）; //获得新项目 String explanationItem = pref.getString（＆＃34; explanationItem＆＃34;，null）;

         if(placeCounterExplanation > 0){

         ///////////////////////////////////// RECEIVE//    

                    //pull existing array
                    JSONArray explanationjArray;
                    try {
                        explanationjArray = new JSONArray(settings.getString("jArray", ""));
                    //converting from json back to workable string array
                  // String []ExplanationDetailArray = new String[explanationjArray.length()];
                        String []ExplanationDetailArray = new String[100];
                    //matching them/converting
                    for(int i = 0, count = explanationjArray.length(); i<= count; i++)
                    {
                        try {
                            String jsonString = explanationjArray.getString(i);

                            ExplanationDetailArray[i] = jsonString;

                        }
                        catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                    //after matching^ it adds newest value
                    ExplanationDetailArray[placeCounterExplanation] = explanationItem;
                    ////////////////////////////////////////////////////////////////////////
                    Intent i = getIntent();
                    // getting attached intent data
                    String product = i.getStringExtra("product");
                    // displaying selected product name
                     txtProduct.setText(product);

                    if (product.equals("Alcohol")){



                        test.setText(ExplanationDetailArray[0]);
                        String placeCount = Integer.toString(placeCounterExplanation);


                    test2.setText(ExplanationDetailArray[1]);

                    //  test3.setText(placeCounterExplanation - 1);

                    }


                    //////////////////////////////////////////////////////////////////////////
                    /////STORE
                    explanationjArray.put(Arrays.toString(ExplanationDetailArray));
                   // explanationjArray.put(ExplanationDetailArray);

                    editor2.putString("jArray", explanationjArray.toString());
                    editor2.commit();

                    } catch (JSONException e1) {
                        // TODO Auto-generated catch block
                        e1.printStackTrace();
                    }

         }











         if (placeCounterExplanation == 0){
             ExplanationDetailArray = new String[100];
             ExplanationDetailArray[0] = explanationItem;
             JSONArray explanationjArray = new JSONArray();
            //////////////////////////////  



            // String sC =  Integer.toString(spotCounter);




                Intent i = getIntent();
                // getting attached intent data
                String product = i.getStringExtra("product");
                // displaying selected product name
                 txtProduct.setText(product);

                if (product.equals("Alcohol")){


                    test.setText(ExplanationDetailArray[0]);
                //  test2.setText(ExplanationDetailArray[1]);

                //  test3.setText(placeCounterExplanation - 1);

                }






             ///////////////////////////////
             //STORING MIGHT NOT NEED THIS INSIDE HERE
            // explanationjArray.put(ExplanationDetailArray);
              explanationjArray.put(Arrays.toString(ExplanationDetailArray));

            editor2.putString("jArray", explanationjArray.toString());
            editor2.commit();

        //  placeCounterExplanation = placeCounterExplanation + 1;
            // editor.putInt("placeCounterExplanation",placeCounterExplanation);
             //editor.commit();

         }


         //after either IF Statement catches teh program, it advances the counter.
         placeCounterExplanation = placeCounterExplanation + 1;
         editor.putInt("placeCounterExplanation",placeCounterExplanation);
         editor.commit();

Answer 1

我相信您的问题来自代码中的以下行： explanationjArray.put（ExplanationDetailArray）;

这会将对象的文本表示插入到JSON数组中。相反，你可以这样做： explanationjArray.put（Arrays.toString（ExplanationDetailArray））; 或者您自己的将字符串数组转换为串联字符串集的实现。

将String Array存储为JSON Array然后在尝试接收并将TextView设置为值时获取Ljava.lang.String @

1 个答案: