Question

我想在每一行中创建一个ListView，其中包含动态改变其大小的每一行中的图像和文本（例如，在开始时listView将不显示任何内容，然后，我将可以向listView添加条目），我也想要listView可以加载位图图像列表而不是可绘制图像。

我创建了这段代码，但代码只从drawable加载图片并创建一次（意味着我无法动态更改列表 - 添加或删除listView条目）

String[] text = { "One", "Two", "Three", "Four", "Five", "Six", "Seven",
       "Eight", "Nine", "Ten" };

     int[] image = { R.drawable.logo, R.drawable.logo, R.drawable.logo,
       R.drawable.logo, R.drawable.logo, R.drawable.logo, R.drawable.logo,
       R.drawable.logo, R.drawable.logo, R.drawable.logo };

    public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
 lv.setAdapter(new MyCustomAdapter(text, listImages));
          edittext= (EditText) findViewById(R.id.EditText01);

          edittext.addTextChangedListener(new TextWatcher()
          {

           public void afterTextChanged(Editable s)
           {

           }

           public void beforeTextChanged(CharSequence s, int start,
            int count, int after)
           {

           }

           public void onTextChanged(CharSequence s, int start,
            int before, int count)
           {

            textlength = edittext.getText().length();
            text_sort.clear();
            image_sort.clear();

            for (int i = 0; i < text.length; i++)
            {
             if (textlength <= text[i].length())
             {
              if (edittext.getText().toString().
           equalsIgnoreCase((String) text[i].subSequence(0, textlength)))
              {
               text_sort.add(text[i]);
              // image_sort.add(image[i]);
              }
             }
            }

            lv.setAdapter(new MyCustomAdapter
             (text_sort, image_sort));

           }
          });
         }

Answer 1

检查listview http://www.java2s.com/Code/Android/UI/Demonstratestheusingalistviewintranscriptmode.htm

的此实现

查看本教程，了解如何使用自定义列表视图项http://www.framentos.com/en/android-tutorial/2012/07/16/listview-in-android-using-custom-listadapter-and-viewcache/

Eidt：使用此适配器类：

  class MyCustomAdapter extends BaseAdapter{
      public static  ArrayList text_array = new ArrayList();
      public static  ArrayList image_array = new ArrayList();
      public int getCount(){
           return text_array..size();
      }
      public long getItemId(int position){
           return position;
      }
      public String getItem(int position){
           return null;
      }
      public View getView(final int position, View convertView, ViewGroup parent) {
        LayoutInflater inflate = getLayoutInflater();
        View v = inflate.inflate(R.layout.listview, parent, false);
        final ImageView image = (ImageView) v.findViewById(R.id.ImageView01);

         if(listImages.get(position) != null) {
                     image.setImageBitmap(image_array.get(position));
                     image.setVisibility(View.VISIBLE);
          } else {
                     image.setVisibility(View.GONE);
                     image.setImageBitmap(null);
                      image.setVisibility(View.VISIBLE);
      }
     return v;

    }
     public void addObject(String text, Bitmap bitmap) {
    text_array.add(text);
        image_array.add(bitmap);
        notifyDataSetChanged();
     } 
}

从您的活动类调用addObject函数以在列表视图中添加新项

动态更改ListView大小并加载图像

1 个答案: