getgroupview中的convertview无法正常工作

时间:2013-06-25 14:04:08

标签: android android-listview expandablelistview expandablelistadapter convertview

我正在制作一个使用listview和listadapters的应用。它工作正常,但我在getgroupview方法中发现了一个内存漏洞。在我每次充气xml文件之前导致泄漏。

 groupRow = inflater.inflate(R.layout.activity_phrase, parent, false);

换句话说 - 我没有使用convertview。所以我将语法改为:

if (convertView == null) {
          groupRow = inflater.inflate(R.layout.activity_phrase, parent, false);
}
else {
     groupRow = convertView;
} 

在此更改后,我遇到了复选框问题。如果我单击一个复选框并向下滚动,则会检查越来越多的框。在这里,当我只检查一个项目并上下滚动一段时间时,我会显示列表的图像listview

以下是重写方法getChildView

中的所有代码
 public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
     //LayoutInflater inflater = (LayoutInflater) weakContext.get().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     //WeakReference <LayoutInflater> inflaterW = new WeakReference <LayoutInflater> (inflater);

     if (convertView == null) {
         LayoutInflater inflater = (LayoutInflater) weakContext.get().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     }
     else {
         groupRow = convertView;
     } 
     final View theRow = groupRow;

     final int group_Position = groupPosition;

     TextView textView;
     if (isExpanded) {
         textView = (TextView) theRow.findViewById(R.id.groupTitle); // fetstil för grupptitel om expanderad
         textView.setTypeface(null, Typeface.BOLD);
         textView.setText(titles[groupPosition]);
     }
     else {
         textView = (TextView) theRow.findViewById(R.id.groupTitle);
         textView.setText(titles[groupPosition]);
         textView.setTypeface(null, Typeface.ITALIC);
     }

     System.out.println("grupppos: " + groupPosition);
     System.out.println("size checked list: " + checked.size());
     CheckBox cb = (CheckBox) theRow.findViewById(R.id.check);
     for (int i = 0; i < checked.size(); i++) {   // kontrollera om aktuell grupp som visas i vyn är tillagd i favoriter. 
         if (checked.get(i) == groupPosition) {
             cb.setChecked(true);
             System.out.println("TRUE");
         }
         else {

         }
     }


     // Lyssnare till checkboxobjektet. 
     cb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
         @Override
         public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
             if (isChecked) { // Tillagd i favoriter
                 checked.add(group_Position); // registrera att denna position är tillagd som favorit
                    System.out.println("I SETONCHECKEDCHANGELISTENER"); 
                 // Lägger in nödvändiga parametrar i mysqlLite.
                 int n_childs = contents[group_Position].length;

                 switch(n_childs) { // om båda könen
                    case 1: sql.addPhrase(group_Position, category, titles[group_Position], contents[group_Position][0], 
                             sound[group_Position][0]);
                        break;
                    case 2:  sql.addPhrases(group_Position, category, titles[group_Position], contents[group_Position][0], // om kap o ka
                             contents[group_Position][1], sound[group_Position][0], sound[group_Position][1]);
                        break;
                 }
             }
             else { // avregistrerad från favoriter
                 for (int i = 0; i < checked.size(); i++) {
                     if (checked.get(i) == group_Position) {
                         checked.remove(i); 
                     }
                 }

                int n_phrases = sql.getRowCount();
                Object[][] phrase = sql.getPhraseList();
                int id = -1;
                for (int i = 0; i < n_phrases; i++) {
                    if ((Integer) phrase[i][1] == group_Position && (Integer) phrase[i][2] == category) {
                        id = (Integer) phrase[i][0];
                    }
                }
                sql.deletePhrase(id); // radera fras från mysqlLite m.a.p. primärnyckel-id.     
            }

          }
          });

     return theRow;
 }

很乐于帮助!!!!!

1 个答案:

答案 0 :(得分:1)

您致电cb.setChecked(true),您还应在相应的其他分支中拨打cb.setChecked(false)。由于视图被回收,视图状态也被回收,您必须自己重置。

此外,似乎没有任何代码首先让您对视图进行充气(如果convertView为空),但这可能只是这个问题的问题。