像编辑文本一样的旋转器

我有一个带有 TextInputLayout+TextInputEditText 和微调器的表单。我想要微调器高度换行文本，但下拉列表中有大项目。问题是微调器的高度取决于下拉项的高度（simple_spinner_dropdown_item）。 我设置 style="@style/Base.Widget.AppCompat.Spinner.Underlined" 以便在微调器下方添加行。

有什么解决办法吗？

像编辑文本一样的旋转器

如果你想要像 edittext 这样的微调器，就像自动完成文本视图.您可以定制您的AppCompatAutoCompleteTextView像那样：

public class AutoCompleteDropDown extends AppCompatAutoCompleteTextView {
    //    implements AdapterView.OnItemClickListener
    private static final int MAX_CLICK_DURATION = 200;
    private long startClickTime;
    private boolean isPopup;
    private int mPosition = ListView.INVALID_POSITION;

    public AutoCompleteDropDown(Context context) {
        super(context);
//        setOnItemClickListener(this);
    }

    public AutoCompleteDropDown(Context arg0, AttributeSet arg1) {
        super(arg0, arg1);
//        setOnItemClickListener(this);
    }

    public AutoCompleteDropDown(Context arg0, AttributeSet arg1, int arg2) {
        super(arg0, arg1, arg2);
//        setOnItemClickListener(this);
    }

    @Override
    public boolean enoughToFilter() {
        return true;
    }

    @Override
    protected void onFocusChanged(boolean focused, int direction,
                                  Rect previouslyFocusedRect) {
        super.onFocusChanged(focused, direction, previouslyFocusedRect);
        if (focused) {
            performFiltering("", 0);
            InputMethodManager imm = (InputMethodManager) getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(getWindowToken(), 0);
            setKeyListener(null);
            dismissDropDown();
        } else {
            isPopup = false;
        }
    }


    @Override
    public boolean onTouchEvent(MotionEvent event) {

        switch (event.getAction()) {
            case MotionEvent.ACTION_UP: {
                if (isPopup) {
                    dismissDropDown();
                } else {
                    requestFocus();
                    showDropDown();
                }
                break;
            }
        }

        return super.onTouchEvent(event);
    }

    @Override
    public void showDropDown() {
        super.showDropDown();
        isPopup = true;
    }

    @Override
    public void dismissDropDown() {
        super.dismissDropDown();
        isPopup = false;
    }



    @Override
    public void setCompoundDrawablesWithIntrinsicBounds(Drawable left, Drawable top, Drawable right, Drawable bottom) {
        Drawable dropdownIcon = ContextCompat.getDrawable(getContext(), R.drawable.ic_expand_more_black_18dp);
        if (dropdownIcon != null) {
            right = dropdownIcon;
            right.mutate().setAlpha(66);
        }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            super.setCompoundDrawablesRelativeWithIntrinsicBounds(left, top, right, bottom);
        } else {
            super.setCompoundDrawablesWithIntrinsicBounds(left, top, right, bottom);
        }

    }



    public int getPosition() {
        return mPosition;
    }
}

And ic_expand_more_black_18dp.png是这样的图像：

Layout:

<android.support.design.widget.TextInputLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:textColorHint="@color/gray_text_hint"
        app:hintTextAppearance="@style/TextAppearance.App.TextInputLayout.Dark">

        <yourpackage.AutoCompleteDropDown
            android:id="@+id/edtBloodType"
            style="@style/edt_dark"
            android:hint="Blood Type"
            android:inputType="textNoSuggestions" />
    </android.support.design.widget.TextInputLayout>

结果（您可以为 AutoCompleteTextView 设置适配器）