如何更改Android Spinner项目的文本大小

Question

我正在访问Java文件中的一个Spinner，设置它的输入为字符串数组，其中包含美国各州的名称。我想要给Spinner中选定的状态指定自定义大小。如何实现？以下是代码：

Spinner state = (Spinner) findViewById(R.id.state);
            ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
                    this, R.array.state, android.R.layout.simple_spinner_item);
            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            state.setAdapter(adapter);

Xml：

<Spinner
android:id="@+id/state"
android:layout_width="wrap_content"
android:layout_height="60dip"
android:layout_marginLeft="10dip"
android:addStatesFromChildren="true" >
</Spinner>

字符串数组以在下拉框中显示：

<string-array name="state">

        <item>Select State</item>
        <item>Alabama</item>
        <item>Alaska</item>
        <item>American Samoa</item>
        <item>Arizona</item>
        <item>Arkansas</item>
        <item>California</item>
        <item>Colorado</item>
        <item>Connecticut</item>
        <item>Delaware</item>
        <item>District of Columbia</item>
        <item>Florida</item>
        <item>Georgia</item>
        <item>Guam</item>
        <item>Hawaii</item>
        <item>Idaho</item>
        <item>Illinois</item>
        <item>Indiana</item>
        <item>Iowa</item>
        <item>Kansas</item>
        <item>Kentucky</item>
        <item>Louisiana</item>
        <item>Maine</item>
        <item>Maryland</item>
        <item>Massachusetts</item>
        <item>Michigan</item>
        <item>Minnesota</item>
        <item>Mississippi</item>
        <item>Missouri</item>
        <item>Montana</item>
        <item>Nebraska</item>
        <item>Nevada</item>
        <item>New Hampshire</item>
        <item>New Jersey</item>
        <item>New Mexico</item>
        <item>New York</item>
        <item>North Carolina</item>
        <item>North Dakota</item>
        <item>Northern Marianas Islands</item>
        <item>Ohio</item>
        <item>Oklahoma</item>
        <item>Oregon</item>
        <item>Pennsylvania</item>
        <item>Puerto Rico</item>
        <item>Rhode Island</item>
        <item>South Carolina</item>
        <item>South Dakota</item>
        <item>Tennessee</item>
        <item>Texas</item>
        <item>Utah</item>
        <item>Vermont</item>
        <item>Virginia</item>
        <item>Virgin Islands</item>
        <item>Washington</item>
        <item>West Virginia</item>
        <item>Wisconsin</item>
        <item>Wyoming</item>
    </string-array>

- aalionline

Answer 1

您可以使用

标签进行排版

。

adapter.setDropDownViewResource(android.R.layout.simple_list_item_1);

或者您可以自己定制布局：

adapter.setDropDownViewResource(R.layout.my_layout);

你的my_layout.xml应该像这样：

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+android:id/text1" android:layout_marginTop="5dp"
        android:layout_marginBottom="5dp" android:padding="3dp"
        android:layout_width="fill_parent" android:layout_height="wrap_content"
        android:gravity="center_horizontal"/> 

- Adil Soomro

Answer 2

尝试使用这样的定制适配器：

        ArrayAdapter<String> spinner_adapter = new ArrayAdapter<String>(getParent()
                .getApplicationContext(), R.layout.my_spinner_style,spinner_values) {

            public View getView(int position, View convertView, ViewGroup parent) {
                View v = super.getView(position, convertView, parent);
                ((TextView) v).setTextSize(18);

                return v;
            }

            public View getDropDownView(int position, View convertView,
                    ViewGroup parent) {
                View v = super.getDropDownView(position, convertView, parent);
                v.setBackgroundResource(R.drawable.spinner_drop_down);
                ((TextView) v).setTextColor(Color
                        .parseColor(config.sort_by_label_color));
                return v;
            }
        };

R.layout.my_spinner_style

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@+android:id/text1"
style="?android:attr/spinnerItemStyle"
android:paddingLeft="5dip"
android:singleLine="true"
android:textColor="#ffffff"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:ellipsize="marquee" />

把适配器设置到你的下拉列表中：

        spinner.setAdapter(spinner_adapter);

- Andro Selva