更改工具栏上的微调器颜色

Question

我正在开发一个示例 Android 应用程序，其工具栏带有微调器 "filter news"，我想使用项目过滤器。

我需要：

更改工具栏上微调器文本的颜色（图 2）
更改项目列表的背景颜色（图3）

完整代码可在 GitHub、here 上获得。一些 xml 代码：

activity_main.xml

  [...]
  <android.support.design.widget.AppBarLayout
    android:id="@+id/appbar"
    android:layout_width="match_parent"
    android:layout_height="@dimen/detail_backdrop_height"
    android:fitsSystemWindows="true"
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

    <android.support.design.widget.CollapsingToolbarLayout
        android:id="@+id/collapsing_toolbar"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        app:contentScrim="?attr/colorPrimary"
        app:expandedTitleMarginEnd="64dp"
        app:expandedTitleMarginStart="48dp"
        app:expandedTitleTextAppearance="@android:color/transparent"
        app:layout_scrollFlags="scroll|exitUntilCollapsed">

        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">

            <ImageView
                android:id="@+id/backdrop"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:fitsSystemWindows="true"
                android:scaleType="centerCrop"
                app:layout_collapseMode="parallax" />

            <LinearLayout
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:gravity="center_horizontal"
                android:orientation="vertical">

                <TextView
                    android:id="@+id/love_music"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    tools:text="@string/backdrop_title"
                    android:textColor="@android:color/white"
                    android:textSize="@dimen/backdrop_title" />

                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    tools:text="@string/backdrop_subtitle"
                    android:textColor="@android:color/white"
                    android:textSize="@dimen/backdrop_subtitle" />

            </LinearLayout>
        </RelativeLayout>

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:layout_collapseMode="pin"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

    </android.support.design.widget.CollapsingToolbarLayout>

</android.support.design.widget.AppBarLayout>
[...]

spinner_dropdown_item.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/text1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorPrimary"
    android:gravity="center_vertical"
    android:minHeight="?android:attr/listPreferredItemHeightSmall"
    android:paddingLeft="12dp"
    android:paddingRight="12dp"
    ></TextView>

和styles.xml

<resources>
    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <style name="AppTheme.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
    </style>

    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

</resources>

提前致谢。

Answer 1

您需要创建一个自定义 java class 扩展 ArrayAdapter 并应用那里的逻辑来更改文本颜色。

public class SpinnerAdapter extends ArrayAdapter<String> {

private Context mContext;
private List<String> mStringList;

public SpinnerAdapter(@NonNull Context context, int resource, @NonNull List<String> spinnerItems) {
    super(context, resource, spinnerItems);
    mContext = context;
    mStringList = spinnerItems;
}

@Override
public View getDropDownView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
    return spinnerView(position, convertView, parent);
}

@Override
public int getCount() {
    return super.getCount();
}

@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
    return spinnerView(position, convertView, parent);
}

private View spinnerView(int position, View convertView, ViewGroup parent){

    ViewHolder holder;
    if (convertView == null){
        holder = new ViewHolder();
        // Your spinner dropdown item xml here
        convertView = LayoutInflater.from(mContext). inflate(R.layout.spinner_dropdown_item, parent, false);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    //Custom logic here, example below
    String matchDay = mStringList.get(position);
    holder.mMatchday = convertView.findViewById(R.id.matchday);
    holder.mDates = convertView.findViewById(R.id.spinner_dates);
    holder.mMatchday.setText(matchDay);


    return convertView;
}

private class ViewHolder {

    private TextView mMatchday, mDates;

}

乌尔Activity

List<String> stringList= new ArrayList<>();
    for (int i = 0; i < 20; i++){
        stringList.add("String " + (i + 1));
    }

SpinnerAdapter dataAdapter = new SpinnerAdapter(getContext(), R.layout.format_home_spinner, stringList);
    mSpinner.setAdapter(dataAdapter);

Answer 2

最后，我找到了解决方案：我对微调器及其项目使用了旧的布局样式。在以下位置更改 MainActivity 微调器声明：

...
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getApplicationContext(),
                R.array.article_filter_text, R.layout.spinner_dropdown_item);
        adapter.setDropDownViewResource( R.layout.spinner_dropdown_item);
...

并且有 spinner_dropdown_item.xml:

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@android:id/text1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/colorPrimary"
    android:textColor="@color/white"
    android:gravity="center_vertical"
    android:minHeight="?android:attr/listPreferredItemHeightSmall"
    android:paddingLeft="12dp"
    android:paddingRight="12dp"
    ></TextView>

我得到了：

并且：

更改工具栏上的微调器颜色

Change spinner color on a toolbar

android

android-appcompat

android-layout

android-styles