Question

我正在用字符串填充列表视图，用户可以通过单击按钮添加项目，然后将其保存到SharedPreferences，并在onCreate上加载SharesPreferences字符串。我的问题是它仅加载一个listView项。

这就是我所拥有的

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    preferences = PreferenceManager.getDefaultSharedPreferences(this);
    listView = (ListView) findViewById(R.id.lview);
    date = new 
    SimpleDateFormat("dd/MM/yyyy",Locale.getDefault()).format(new Date()); 

//Load strings from SharedPreferences 
   try {
        isanswer = preferences.getBoolean("dialogOptions", false);
        times = preferences.getString("day", null);
        humeur = preferences.getString("humour", null);
        test = preferences.getString("draw", null);
        imgit = getResources().getIdentifier(test, "drawable", 
        getPackageName());
    }catch (Exception e){
//If there is nothing then 
        isanswer = false;
        times = null;
        humeur = null;
        test = null;
    }

// An initial answer it works with a boolen
    if (!isanswer) {
        dialogOne();
    } else {
        dialogTwoo();
    }

 //Defining ArrayLists 
    imgadt = new ArrayList<Integer>(Arrays.asList(imgit));
    listadapt = new ArrayList<String>(Arrays.asList(times));
    descradapt= new ArrayList<String>(Arrays.asList(humeur));

    adapter = new costomAdapter(this, R.layout.lviewcostom, listadapt, 
    descradapt, imgadt);

    listView.setAdapter(adapter);
    adapter.notifyDataSetChanged(); 

 }
 //i've tried this to get all strings in ArrayList and put them as ListView Items. 


 public void onResume(){
     super.onResume();


    for (int i = 0; i < imgl.size(); i++) {
        imgadt = new ArrayList<Integer>(imgl.get(i) + i);
    }

    for (int i = 0; i < stringList.size(); i++) {
       listadapt = new ArrayList<String>(stringList.get(i) + i);
    }
    for (int i = 0; i < descriptionl.size(); i++) {
        descradapt = new ArrayList<String>(descriptionl.get(i) + i);
    }


   adapter.notifyDataSetChanged();
}

// and this


  public void onResume(){
       super.onResume();

       imgadt = new ArrayList<Integer>(imgl.get(0));
       listadapt = new ArrayList<String>(stringList.get(0))
       descradapt = new ArrayList<String>(descriptionl.get(0));

       adapter.notifyDataSetChanged();
}

// and my ClickListener

  btn.setOnClickListener(new View.OnClickListener() {
               @Override
               public void onClick(View view) {


                   if (times == null) {
                       times =  date;
                       humeur =  "Sick";
                       test = "sick" ;
                       times = date;
                       humeur = "Heureux";
                       test = "happy";
                       imgadt = new ArrayList<Integer> (Arrays.asList(R.drawable.happy));
                    listadapt = new ArrayList<String>(Arrays.asList(date));
                    descradapt= new ArrayList<String>(Arrays.asList("Heureux"));
                   } else {
                       imgadt.add(R.drawable.sick);
                       listadapt.add(date);
                       descradapt.add("Sick");
                       times = times + "\n" +  date";
                       humeur = humeur + "\n"  + "Sick" ;
                       test = test +  "," + "sick";
                   }


               }
           });

添加到共享首选项

 okit.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {

                preferences.edit().putString("day", times).commit();
                preferences.edit().putString("humour", humeur).commit();
                preferences.edit().putString("draw", test).commit();
                adapter.notifyDataSetChanged();

                if(empty){
                    adapter = new costomAdapter(Main.this, 
                     R.layout.lviewcostom, listadapt, descradapt, imgadt);
                    listView.setAdapter(adapter);

                }

            }

 });

通常我是这样的：String[] string = {"New Test", "New Test 2"};

但是我想从共享的首选项中获取此信息，这就是为什么我要这样做：String [] strings = new String [] {times};

有什么办法吗？

编辑：

我自己做到的：D

对于正在搜索它的其他人，这是我所做的：

   String str1,
   String[] str;
   ArrayList<String> listadapt;
   Integer allItems;
   ListView listView;
   Custom Adapter adapter;

和onCreate

//load from SharedPreferences

   times = preferences.getString("day", null);
   allItems = preferences.getInt("all", 0);
   str = times.split(",");

// Définir ListView custom ArrayAdapter 
   listadapt = new ArrayList<String>();
   adapter = new customAdapter(Main.this, listadapt, descradapt, imgadt);
   defineThem();
   listView.setAdapter(adapter);
   adapter.notifyDataSetChanged();

///以str加载所有字符串（时间不包含“，”或“ \ n”或其他）公共无效define（）{

 //If there is only one String on str
    if (allItems == 1){
        str1 = str[0];

        listadapt.add(str1);

    }

 //If there is twoo Strings on str
    if (allItems == 2){
        str1 = str[0];
        str2 = str[1];

 //Add items to adapter
        listadapt.add(str1);
        listadapt.add(str2);

   }

如果您想装载很多物品，那么上面的那个不是一个好的解决方案。

如果您想加载很多字符串，我会发现另一种方式：

for(int i = 0 ; i < str.lenght; i++){
   listadapt.add(string[0] ) 
}

可以关闭

如何用字符串填充listview

0 个答案: