android - 如何将加载指示器添加到 AutoCompleteTextView

Question

我想在从网络服务加载数据时在 AutoCompleteTextView 中显示加载指示器。最好它应该显示在自动完成的右侧(f.i. 动画，如正在进行的控制 - 纺车)。如何做到这一点？

Answer 1

I would like to show loading indicator in AutoCompleteTextView while loading data from web-service.

在小部件的右侧放置一个具有不确定外观的 ProgressBar 并像这样扩展 AutoCompleTextView 类:

public class AutoCompleteLoadding extends AutoCompleteTextView {

    private ProgressBar mLoadingIndicator;

    public void setLoadingIndicator(ProgressBar view) {
        mLoadingIndicator = view;
    }

    @Override
    protected void performFiltering(CharSequence text, int keyCode) {
        // the AutoCompleteTextview is about to start the filtering so show
        // the ProgressPager
        mLoadingIndicator.setVisibility(View.VISIBLE);
        super.performFiltering(text, keyCode);
    }

    @Override
    public void onFilterComplete(int count) {
        // the AutoCompleteTextView has done its job and it's about to show
        // the drop down so close/hide the ProgreeBar
        mLoadingIndicator.setVisibility(View.INVISIBLE);
        super.onFilterComplete(count);
    }

}

使用 setLoadingIndicator() 方法将引用传递给 ProgressBar。这假定您在适配器(AutoCompleteTextView)/适配器的过滤器中发出 Web 服务请求。