android - 以编程方式在可扩展列表中扩展组行

我正在使用expandablelistview。无论如何，单击内部图像后，我是否可以展开组行？我知道要让图像响应点击，我必须设置其焦点。现在，一旦该图像响应了单击(在我的客户适配器内部)，我如何以编程方式扩展/折叠它所属的特定组行？

谢谢

最佳答案

在适配器中

private OnItemSelectedListener onItemSelectedCallback;

public interface OnItemsSelectedListener {
    public void onImageSelected(int groupPos);
}

public YourAdapter(Context context) {
    try {
        this.onItemSelectedCallback = (OnItemSelectedListener ) context;
    }
    catch (ClassCastException e) {
        throw new ClassCastException(context.toString() + " must implement OnItemSelectedListener ");
    }
}

在getView()中添加它

ImageView imageView = new ImageView();
imageView.setTag(R.id.tagGroupPosition, groupPosition);
imageView.setOnClickListener(onClickListener);

在OnClickListener中添加

OnClickListener onClickListener = new OnClickListener() {
    @Override
    public void onClick(View v) {
        int groupPos = ((ImageView) v).getTagId(R.id.tagGroupPosition);
        onItemSelectedCallback.onImageSelected(groupPos);
    }
}

然后在 Activity 中，您必须实现YourAdapter.OnItemsSelectedListener重写onImageSelected

@Override
public void onImageSelected(int groupPos){
    if(expandableList.isGroupExpanded(groupPos)){
        expandableList.collapseGroup(groupPos);
    }else{
        expandableList.expandGroup(groupPos);
    }
}