java - Android:Spinner onItemSelect 膨胀另一个 Spinner

Question

我有一个微调器 onItemSelect 我需要根据第一个选择打开另一个微调器。这是代码......我能够给第一个微调器充气但是在选择一个条目时没有任何反应

Spinner filterSpinner = new Spinner(SearchResultsActivity.this);
            filterSpinner.setPrompt("Filter By");
            ArrayAdapter<String> filterSpinnerArrayAdapter = new ArrayAdapter<String>(
                    SearchResultsActivity.this,
                    android.R.layout.simple_spinner_item,
                    filterSpinnerArray);
            filterSpinnerArrayAdapter
                    .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            filterSpinner.setAdapter(filterSpinnerArrayAdapter);
            filterSpinner.performClick();
            filterSpinner.setOnItemSelectedListener(new FilterItemSelectedListener());

这是处理微调器 onItemSelected 的代码:

public class FilterItemSelectedListener implements OnItemSelectedListener {

    public void onItemSelected(AdapterView<?> parent, View view, int pos,
            long id) {
        switch (pos) {
        case 0:

            Spinner filterBusSpinner = new Spinner(SearchResultsActivity.this);
            filterBusSpinner.setPrompt("Filter Buses By");
            ArrayAdapter<String> filterBusSpinnerArrayAdapter = new ArrayAdapter<String>(
                    SearchResultsActivity.this,
                    android.R.layout.simple_spinner_item,
                    filterByBusSpinnerArray);
            filterBusSpinnerArrayAdapter
                    .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            filterBusSpinner.setAdapter(filterBusSpinnerArrayAdapter);
            filterBusSpinner.performClick();
            break;
        case 1:
            Spinner filterTimeSpinner = new Spinner(SearchResultsActivity.this);
            filterTimeSpinner.setPrompt("Filter By Time");
            ArrayAdapter<String> filterTimeSpinnerArrayAdapter = new ArrayAdapter<String>(
                    SearchResultsActivity.this,
                    android.R.layout.simple_spinner_item,
                    filterByBusSpinnerArray);
            filterTimeSpinnerArrayAdapter
                    .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            filterTimeSpinner.setAdapter(filterTimeSpinnerArrayAdapter);
            filterTimeSpinner.performClick();
            break;
        }
    }

    public void onNothingSelected(AdapterView parent) {
        // Do nothing.
    }
}

任何帮助将不胜感激......

Answer 1

据我所知，微调器不会打开，除非它被绘制在屏幕上。所以在 filterTimeSpinner.performClick() 之前，您应该将新的微调器附加到一些现有的布局上。

但是，我已经通过上下文菜单做了一些与您的需求类似的事情。

i register a context menu to the spinner (which can be designed to look just like spinner rows if needed), and when an item is selected, i open the context menu. (不是一样的效果吗？)

希望对你有帮助。
弗拉德