The dropdown is displaying correctly,but when I select any item from dropdown,is not displayed in the Box.

而且奇怪的是,该功能在6.0.1之前的所有Android操作系统(即6.0.0和之前版本)上都有效.
我也试过AppCompatSpinner,结果是一样的.

main.xml中：

<Spinner
    android:id="@+id/spinner"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_weight="0.3"
    android:entries="@array/values" />

Main.java：

Spinner spinner = (Spinner) findViewById(R.id.spinner);
spinner.setSelection(5); // Not displaying 5th item,Yes! there are more than 5 items.
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView<?> parent,View view,int position,long id) {
        spinner.setSelection(position);
    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {
        spinner.setSelection(5);
    }
});