Android[初级教程]第四篇 Spinner控件

还是接上一篇,这次妖精们说了,不要用RadioButton控件了,不好看,还占地方,抓一个人,要占四个地方,那我抓一个人只要占一个地方就行了,于是用了Spinner控件,还是一次抓一个

main.xml如下

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</pre><pre class="html" name="code"><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <Spinner android:layout_height="wrap_content" android:id="@+id/spinner"
        android:layout_width="wrap_content"></Spinner>
    <TextView android:layout_height="wrap_content"
        android:layout_width="fill_parent" android:text="@string/hello"
        android:id="@+id/text"></TextView>
</LinearLayout>

Activity的java代码如下:

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import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;

public class ButtonDemoActivity extends Activity implements OnItemSelectedListener
{
    private TextView text = null;
    private Spinner spinner;
    private String[] item = { "唐僧", "孙悟空 ", "猪八戒", "沙和尚" };

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // 通过ID查找到main.xml中的TextView控件
        text = (TextView) findViewById(R.id.text);

        // 通过ID查找到main.xml中的Spinner控件
        spinner = (Spinner) findViewById(R.id.spinner);

        //设定一个Array适配器,将数组数据放入适配器中
        ArrayAdapter adapter = new ArrayAdapter(this,
                android.R.layout.易做图_spinner_item, item);
        //设置下拉列表的样式
        adapter.setDropDownViewResource(android.R.layout.易做图_spinner_dropdown_item);

        //对Spinner进行适配
        spinner.setAdapter(adapter);

        //Spinner中事件选择的监听
        spinner.setOnItemSelectedListener(this);

    }

    private void updateText(String string)
    {
        // 将文本信息设置给TextView控件显示出来
        text.setText(string);
    }

    @Override
    public void onItemSelected(AdapterView<?> arg0, View arg1, int position,
            long arg3)
    {
        String str = "这次妖精把" + item[position] + "抓住了!";
        updateText(str);

    }

    @Override
    public void onNothingSelected(AdapterView<?> arg0)
    {
        // TODO Auto-generated method stub

    }

}
你要说妖精们的事还真多,一会这样,一会那样的,用我们现在的话来说就叫"众口难调"啊,毕竟妖精多了去了,

摘自：kangkangz4的专栏

补充：移动开发 , Android ,