Question

情况：

我的appcompat工具栏中有一个searchview小部件，它允许通过sqlitedatabase提供自定义建议。

问题：

我无法将下拉建议列表扩展为屏幕的整个宽度。最好，列表宽度几乎是屏幕的宽度，除了左侧和右侧的小边距/填充问题。如何使下拉列表与屏幕具有相同的宽度？

我尝试过的事情：

AutoCompleteText的setPadding，setRight / setLeft，setDropDownHorizontalOffset，设置布局参数，并将宽度设置为match_parent。

菜单/ search.xml

<item
    android:id="@+id/search_restaurant"
    android:title="Search"
    android:icon="@drawable/search"
    android:orderInCategory="2"
    app:actionViewClass="android.support.v7.widget.SearchView"
    app:showAsAction="always"/>

RES / search_view_suggestions_list_item

<TextView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/text1"
    android:layout_width="match_parent"
    android:layout_height="48dp"
    android:textAppearance="?android:attr/textAppearanceListItemSmall"
    android:background="@android:color/white"
    android:gravity="center_vertical"
    android:paddingLeft="16dp"
    android:paddingRight="16dp"
    android:minHeight="?android:attr/listPreferredItemHeightSmall"/>

活性/ Activity.java

    MenuItem searchItem = menu.findItem(R.id.search_restaurant);
    searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
    searchView.setQueryHint("Search Restaurant");
    searchView.setOnQueryTextListener(this);
    searchView.setOnSuggestionListener(this);
    final AutoCompleteTextView searchAutoCompleteTextView = (AutoCompleteTextView) searchView
            .findViewById(R.id.search_src_text);
    searchAutoCompleteTextView.setThreshold(1);
    searchAutoCompleteTextView.setDropDownWidth(ViewGroup.LayoutParams.MATCH_PARENT);

    // Tried to change margins/padding here
    LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)
            searchAutoCompleteTextView.getLayoutParams();
    params.setMargins(0, 0, 0, 0);
    searchAutoCompleteTextView.setLayoutParams(params);
    searchAutoCompleteTextView.setPadding(0, 0, 0, 0);

    searchAutoCompleteTextView.setDropDownHorizontalOffset(-100);
    searchAutoCompleteTextView.setPadding(0,0,0,0);
    searchAutoCompleteTextView.setLeft(0);

    final View dropDownSuggestions = searchView.findViewById(searchAutoCompleteTextView
            .getDropDownAnchor());
    if (dropDownSuggestions != null) {
        dropDownSuggestions.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
            @Override
            public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) {
                int point[] = new int[2];

                dropDownSuggestions.getLocationOnScreen(point);
                int dropDownPadding = point[0] + searchAutoCompleteTextView
                        .getDropDownHorizontalOffset();

                Rect screenSize = new Rect();
                getWindowManager().getDefaultDisplay().getRectSize(screenSize);
                int screenWidth = screenSize.width();
                searchAutoCompleteTextView.setDropDownWidth(screenWidth * 2);
            }
        });
    }

Answer 1

您想要的宽度大小可以通过使用换行内容来实现。试试这段代码： searchAutoCompleteTextView.setDropDownWidth（ViewGroup.LayoutParams.WRAP_CONTENT）;

当我通过这个链接时，我得到了这个答案：

https://www.youtube.com/watch?v=408pMAQFnvs

Answer 2

您必须参考SearchView使用的SearchAutoComplete对象，然后设置其大小并更改具有填充的背景资源，请参阅我的答案：

https://stackoverflow.com/a/43481639/5255624

Android searchView下拉菜单屏幕宽度

2 个答案: