在我的Android应用程序中,我正在使用旋转器,我已经从SQLite数据库加载数据到旋转器中,它工作正常。这是它的代码。

Spinner spinner = (Spinner) this.findViewById(R.id.spinner1);
List<String> list = new ArrayList<String>();
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>  (this,android.R.layout.simple_spinner_item, list);
cursor.moveToFirst();

list.add("All Lists");

if (cursor.getCount() > 0) {
    for (int i = 0; i < cursor.getCount(); i++) {
        keyList[i] = cursor.getString(cursor.getColumnIndex(AndroidOpenDbHelper.KEYWORD));
        list.add(keyList[i]);
        cursor.moveToNext();
    }
}
Database.close();
cursor.close();
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(dataAdapter);

现在我想要改变旋转数据的文本颜色和文本大小。我在XML文件上使用了以下XML行作为旋转标记,但它不起作用。

android:textColor="@android:color/white"
android:textSize="11dp"

我如何改变我的转轮的文本颜色和文本大小?


当前回答

我们可以像这样改变旋转器的textview设置主题的样式:

styles.xml:

<style name="mySpinnerItemStyle" parent="@android:style/Widget.Holo.DropDownItem.Spinner">
    <item name="android:textSize">@dimen/_11ssp</item>
    <item name="android:textColor">@color/blue</item>
    <item name=...</item>
</style>

then

<Spinner
                    android:theme="@style/mySpinnerItemStyle"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"/>

如果你想改变纺纱机的textview属性编程式:

编程:

val textView = (view.getChildAt(0) as TextView)
textView.setTextColor(resources.getColor(R.color.dark_mode))

其他回答

Ashraf的另一个解决方案是确保你考虑到屏幕尺寸。你需要在onCreate中获得旋转器,并在设置适配器后设置监听器:

//set your adapter with default or custom spinner cell, then://
serverSpinner.setOnItemSelectedListener(spinnerSelector);
serverSpinner.setSelection(defaultServer);

然后你可以开始改变在旋转器被点击之前显示的视图的文本大小:

private AdapterView.OnItemSelectedListener spinnerSelector = new AdapterView.OnItemSelectedListener() {
    public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
        boolean tabletSize = getResources().getBoolean(R.bool.isTablet);
        boolean largeTablet = getResources().getBoolean(R.bool.isLargeTablet);
        if (tabletSize) { ((TextView)parent.getChildAt(0)).setTextSize(16); }
        else if (largeTablet) { ((TextView)parent.getChildAt(0)).setTextSize(18); }
        else { ((TextView)parent.getChildAt(0)).setTextSize(12); }
    }
    public void onNothingSelected(AdapterView<?> parent) {

    }
};

你所需要做的就是创建如下布局的特定文件夹:

values-sw360dp values-sw600dp values-sw800dp

然后在每个文件夹中添加一个名为“bol . XML”的XML文件:

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <bool name="isTablet">false</bool>
    <bool name="isLargeTablet">false</bool>
</resources>

我们可以像这样改变旋转器的textview设置主题的样式:

styles.xml:

<style name="mySpinnerItemStyle" parent="@android:style/Widget.Holo.DropDownItem.Spinner">
    <item name="android:textSize">@dimen/_11ssp</item>
    <item name="android:textColor">@color/blue</item>
    <item name=...</item>
</style>

then

<Spinner
                    android:theme="@style/mySpinnerItemStyle"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"/>

如果你想改变纺纱机的textview属性编程式:

编程:

val textView = (view.getChildAt(0) as TextView)
textView.setTextColor(resources.getColor(R.color.dark_mode))

只需添加新的样式,像这样:

<style name="mySpinnerItemStyle" parent="ThemeOverlay.AppCompat.Dark">
    <item name="android:textColor">#000</item>
    <item name="android:color">#000</item>
</style>

并使用它:

<Spinner
      android:id="@+id/spinnerCategories"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      style="@style/mySpinnerItemStyle"
      android:layout_margin="5dp" />

可以通过重写getView方法更改文本颜色,如下所示:

 new ArrayAdapter<String>(getContext(), android.R.layout.simple_spinner_dropdown_item, list()){
                @Override
                public View getView(int position, View convertView, @NonNull ViewGroup parent) {
                    View view = super.getView(position, convertView, parent);
                    //change the color to which ever you want                    
                    ((CheckedTextView) view).setTextColor(Color.RED);
                    //change the size to which ever you want                    
                    ((CheckedTextView) view).setTextSize(5);
                    //for using sp values use setTextSize(TypedValue.COMPLEX_UNIT_SP, 16);
                    return view;
                }
    }

简单而干脆……

private OnItemSelectedListener OnCatSpinnerCL = new AdapterView.OnItemSelectedListener() {
    public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {

       ((TextView) parent.getChildAt(0)).setTextColor(Color.BLUE);
       ((TextView) parent.getChildAt(0)).setTextSize(5);

    }

    public void onNothingSelected(AdapterView<?> parent) {

    }
};