Question

我有4x25 GridView。每个单元包含RadioButton＆amp; TextView的。

我的适配器：

public class FieldAdapter extends BaseAdapter {
Context context; TextView Cell_num; View Cell;  
LayoutInflater inflater;

  public FieldAdapter(Context context) 
     {
                    this.context=context;
                    inflater = ((Activity) context).getLayoutInflater();                 
     }
  @Override
  public long getItemId(int position) {
    return position;
  }

  @Override
  public Object getItem(int position) {
    return 0;
  }

  public int getCount() 
  {
               return 100;
  }

  @Override
     public View getView(int pos, View convertView, ViewGroup parent) 
     {  
      if (convertView == null) 
      {
        Cell = new View (context);
        Cell = inflater.inflate(R.layout.cell, parent, false);
        Cell_num = (TextView)Cell.findViewById(R.id.top_cell_text);
        Cell_num.setText(Integer.toString(pos));
        Log.d("Filled cell number",Integer.toString(pos));

      }
      else {
        Log.d("Else","View already exist");
        Cell = (View) convertView;                   
      }
        return Cell;
     }

}

我的活动类：

public class FieldActivity extends Activity {
    GridView Field; FieldAdapter FieldAdapter; MyMethods Method = new MyMethods();  

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.field);
        Field = (GridView) findViewById(R.id.Field);
        FieldAdapter = new FieldAdapter(this);
        Field.setAdapter(FieldAdapter);
        Method.CreateGrid (Field, this);//here i set numColumns & strechmode
      }//onCreate

}

创建网格后，我在屏幕上看到6行，共4列。它是24个元素（0-23）

我在LogCat中看到了什么（我在评论中添加了一些问题）：

05-08 19:07:57.584: D/Filled cell number(19267): 0
05-08 19:07:57.594: I/Adreno200-EGLSUB(19267): <ConfigWindowMatch:2087>: Format RGBA_8888.
05-08 19:07:57.604: D/Else(19267): View already exist /*why else condition was triggered?*/
05-08 19:07:57.614: D/Filled cell number(19267): 1
05-08 19:07:57.614: D/Filled cell number(19267): 2
05-08 19:07:57.624: D/Filled cell number(19267): 3
05-08 19:07:57.624: D/Filled cell number(19267): 4
05-08 19:07:57.634: D/Filled cell number(19267): 5
05-08 19:07:57.634: D/Filled cell number(19267): 6
05-08 19:07:57.644: D/Filled cell number(19267): 7
05-08 19:07:57.644: D/Filled cell number(19267): 8
05-08 19:07:57.644: D/Filled cell number(19267): 9
05-08 19:07:57.654: D/Filled cell number(19267): 10
05-08 19:07:57.664: D/Filled cell number(19267): 11
05-08 19:07:57.674: D/Filled cell number(19267): 12
05-08 19:07:57.684: D/Filled cell number(19267): 13
05-08 19:07:57.684: D/Filled cell number(19267): 14
05-08 19:07:57.694: D/Filled cell number(19267): 15
05-08 19:07:57.694: D/Filled cell number(19267): 16
05-08 19:07:57.704: D/Filled cell number(19267): 17
05-08 19:07:57.704: D/Filled cell number(19267): 18
05-08 19:07:57.704: D/Filled cell number(19267): 19
05-08 19:07:57.714: D/Filled cell number(19267): 20
05-08 19:07:57.714: D/Filled cell number(19267): 21
05-08 19:07:57.724: D/Filled cell number(19267): 22
05-08 19:07:57.724: D/Filled cell number(19267): 23
05-08 19:07:57.734: D/Filled cell number(19267): 0 /*Why again 0 number? Why not 24?*/

然后，如果我尝试向下滚动：

05-08 19:13:15.517: D/Else(19985): View already exist
05-08 19:13:15.527: D/Filled cell number(19985): 25
05-08 19:13:15.537: D/Filled cell number(19985): 26
05-08 19:13:15.537: D/Filled cell number(19985): 27
05-08 19:13:15.587: D/Else(19985): View already exist
05-08 19:13:15.587: D/Else(19985): View already exist
05-08 19:13:15.587: D/Else(19985): View already exist
05-08 19:13:15.587: D/Else(19985): View already exist
05-08 19:13:15.827: D/Else(19985): View already exist
05-08 19:13:15.827: D/Else(19985): View already exist
... etc

为什么只创建25 26 27个细胞？为什么单元格停止创建并开始重复（否则条件）

如果我尝试回滚我的GridView - 我看到相同的图片。我有这样的混蛋：

3  2  1  0
7  6  5  4
8  9  10  11  
...

需要帮助。

Answer 1

以下是此问题的解决方案。

适配器：

ArrayList <View> Cells = new ArrayList <View>();
...
...   
 public void FillArray(ViewGroup parent) {
      while (cellIndex < getCount()){
             Cells.add(inflater.inflate(R.layout.cell,parent, false)); 
             Log.d("ArrayList" + Integer.toString(cellIndex), "is null: " + (Cells.get(cellIndex) == null));
             cellIndex++;
         }   
  }
  public View getView(int pos, View convertView, ViewGroup parent) 
     {  
        FillArray(parent);
        Cell_num = (TextView)Cells.get(pos).findViewById(R.id.top_cell_text);
        Cell_num.setText(Integer.toString(pos));
        Log.d("Filled cell number",Integer.toString(pos));
        Log.d("ArrayList" + Integer.toString(pos), "is null: " + (Cells.get(pos) == null));            
        return Cells.get(pos);
     }

我使用ArrayList作为getView方法的View元素的源。即使滚动屏幕，它也会使每个单元格重新处于其状态。

然而，它使你的适配器在从屏幕边缘出现时重新填充单元格。

Android：GridView停止填充其单元格

1 个答案: