我想在setAdapter()方法后对项目执行单击。
考虑一下,如果您已经在活动中全局声明并初始化了一个按钮,那么您可以从该活动的任何范围以编程方式对其执行单击,监听器将工作。我想要类似的东西,能够在我的gridview的任何项目上执行一次点击。
到目前为止,我已经一个接一个地尝试了下面所有的方法,但似乎没有一个有效,我尝试了不同的堆栈问题,但甚至没有一个答案对我有效。
iconsGrid.setSelection(2);
iconsGrid.setSelected(true);
iconsGrid.performClick();
iconsGrid.performItemClick(iconsGrid, 2, 2);
iconsGrid.performItemClick(iconsGrid, 2, iconsGrid.getItemIdAtPosition(2));

//Activity
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mTextView = (TextView) findViewById(R.id.txt);
    Integer[] resource_icons = {
            R.drawable.ic_attachment,
            R.drawable.ic_attachment,
            R.drawable.ic_attachment,
            R.drawable.ic_attachment,
            R.drawable.ic_attachment,
            R.drawable.ic_attachment };

    GridView iconsGrid = (GridView) findViewById(R.id.gv_icons);
    IconGridAdapter iconAdapter = new IconGridAdapter(this, resource_icons);
    iconsGrid.setAdapter(iconAdapter);
   /*
    * I want to perform a click here
    */
}

//Adapter
@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater li;
    View grid;
    if (convertView == null) {
        grid = new View(mContext);
        li = ((Activity) mContext).getLayoutInflater();
        grid = li.inflate(R.layout.grid_cell_imageview, parent, false);
    } else {
        grid = (View) convertView;
    }

    ImageView imageView = (ImageView) grid.findViewById(R.id.image);
    imageView.setImageResource(imageId[position]);

    return grid;
}

最佳答案

好吧,我们这样做吧
在适配器中声明一个字段

private int selectedPosition=-1;

现在为这个创建一个setter
private void setSelectedPosition(int position)
{
selectedPosition=position;
}

现在在getview方法中
if(position==selectedPosition)
    {
    grid.setSelected(true);

    //OR

    grid.setBackgroundColor(<Some Color>);
    }

现在在设置适配器之后
adapter.setSelectedPosition(<your desired selected item position>);

adapter.notifyDataSetChanged();

09-13 11:56