Question

我从数据库中检索我的游泳表现。我想根据他的价值改变一个字段的背景颜色。例如，如果我游泳4圈我想要彩色背景。我尝试使用正确设置背景但文本消失的代码。

        String[] columns = new String[] { "swimm_pos", "swimm_date","swimm_lap", "swimm_stroke", "swimm_time", "swimm_media", "swimm_efficiency", "swimm_note" };
        int[] to = new int[] { R.id.row_counter, R.id.swimm_date, R.id.swimm_lap, R.id.swimm_stroke, R.id.swimm_time, R.id.swimm_medialap, R.id.swimm_efficiency, R.id.swimm_note};

        SimpleCursorAdapter adapter = new SimpleCursorAdapter(
            this, 
            R.layout.contacto_list_item, 
            cursor, 
            columns, 
            to);

        adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
            public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
              if (view.getId() == R.id.swimm_lap)
                { 
                  int color = cursor.getInt(columnIndex);
                  String s = String.valueOf(color);
                  if (s.equals("4")) {
                  TextView tv = (TextView)view;
                  tv.setBackgroundColor(0xFF558866);}
                 return true;

            }
              return false;}

        });

并且也有可能，当lap等于另一个字段的4设置背景颜色时，例如在我的代码中：R.id.swimm_pos？谢谢。

Answer 1

从ViewBinder返回true意味着您还将数据绑定到View。

但在你的情况下，你没有设置R.id.swimm_lap的文本。

所以在return语句

之前添加setText

tv.setText(s);
return true;

编辑：对于第二个问题，假设您想根据泳圈改变R.id.row_counter的背景，然后添加

else if (view.getId() == R.id.row_counter){ 
 int color = cursor.getString(cursor.getColumnIndex("swimm_lap")); 
 if (s.equals("4")) {
     view.setBackgroundColor(0xFF558866);
 }
}

Answer 2

解决了，这里是正确的代码：

         adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() {
            public boolean setViewValue(View view, Cursor cursor, int columnIndex) {
              if (view.getId() == R.id.row_counter)
                { 
                  int color = cursor.getInt(cursor.getColumnIndex("swimm_lap"));
                  String s = String.valueOf(color);
                  if (s.equals("4")) {
                  TextView tv = (TextView)view;
                  tv.setBackgroundColor(0xFF558866);
                              }
                 return true;
            }
              return false;}
        });
    this.setListAdapter(adapter);
    datasource.close();
}

Android - SimpleCursorAdapter.ViewBinder - 设置背景颜色

2 个答案: