Android Spinner下拉框使用

Posted 2021-10-28 彬sir哥

Spinner下拉框效果如下：


1.activity_main.xml，Spinner下拉框

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="黑色色块：" />

    <Spinner
        android:id="@+id/sp_color_black"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:entries="@array/spinarr_color_black" />

    <TextView
        android:id="@+id/textview"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textColor="#000000"
        android:text="666666"/>

</LinearLayout>

在res的values目录下创建array.xml文件
array.xml文件内容：

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string-array name="spinarr_color_black">
        <item>黑色</item>
        <item>白色</item>
        <item>蓝色</item>
        <item>绿色</item>
        <item>黄色</item>
        <item>红色</item>
        <item>紫色</item>
        <item>粉红色</item>
        <item>薄荷色</item>
    </string-array>
</resources>

2.MainActivity.java，Spinner下拉框使用

public class MainActivity extends AppCompatActivity {
    private Spinner sp_color_black;
    private TextView mtextview;
    private int color_black;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        sp_color_black = (Spinner) findViewById(R.id.sp_color_black);
        mtextview = (TextView) findViewById(R.id.textview);
        sp_color_black.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                String str_color_black = getResources().getStringArray(R.array.spinarr_color_black)[position];
                if (str_color_black.equals("黑色")) {
                    color_black = Color.BLACK;
                } else if (str_color_black.equals("白色")) {
                    color_black = Color.WHITE;
                } else if (str_color_black.equals("蓝色")) {
                    color_black = Color.BLUE;
                } else if (str_color_black.equals("绿色")) {
                    color_black = Color.GREEN;
                } else if (str_color_black.equals("黄色")) {
                    color_black = Color.YELLOW;
                } else if (str_color_black.equals("红色")) {
                    color_black = Color.RED;
                } else if (str_color_black.equals("紫色")) {
                    color_black = Color.parseColor("#9370DB");
                } else if (str_color_black.equals("粉红色")) {
                    color_black = Color.parseColor("#ffc0cb");
                } else if (str_color_black.equals("薄荷色")) {
                    color_black = Color.parseColor("#BDFCC9");
                } else {
                    color_black = Color.BLACK;
                }
                mtextview.setTextColor(color_black);
            }
            @Override
            public void onNothingSelected(AdapterView<?> parent) {
            }
        });
    }
}