Android入门（九）：CheckBox多选清单和ScrollView滚动条

　　字符串资源文件strings.xml:

<resources>
    <string name="hello">主类main</string>
    <string name="app_name">选项</string>
    <string name="music">音乐</string>
    <string name="sing">唱歌</string>
    <string name="dance">跳舞</string>
    <string name="travel">旅行</string>
    <string name="reading">阅读</string>
    <string name="writing">写作</string>
    <string name="climbing">爬山</string>
    <string name="swim">游泳</string>
    <string name="exercise">运动</string>
    <string name="fitness">健身</string>
    <string name="photo">摄影</string>
    <string name="eating">美食</string>
    <string name="painting">画画</string>
    <string name="promptSelOK">确定</string>
    <string name="hobList">你的兴趣爱好：</string>
</resources>

界面布局文件main.xml

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

        <CheckBox android:id="@+id/chbMusic"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/music"/>
        <CheckBox android:id="@+id/chbSing"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/sing"/>
        <CheckBox android:id="@+id/chbDance"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/dance"/>
        <CheckBox android:id="@+id/chbTravel"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/travel"/>
        <CheckBox android:id="@+id/chbReading"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/reading"/>
        <CheckBox android:id="@+id/chbWriting"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/writing"/>
        <CheckBox android:id="@+id/chbClimbing"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/climbing"/>
        <CheckBox android:id="@+id/chbSwim"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/swim"/>
        <CheckBox android:id="@+id/chbExercise"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/exercise"/>
        <CheckBox android:id="@+id/chbFitness"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/fitness"/>
        <CheckBox android:id="@+id/chbPhoto"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/photo"/>
        <CheckBox android:id="@+id/chbEating"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/eating"/>
        <CheckBox android:id="@+id/chbPainting"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/painting"/>
        <Button android:id="@+id/btnSelOK"
            android:layout_width="200dp"
            android:layout_height="wrap_content"
            android:textSize="30sp"
            android:text="@string/promptSelOK"/>
        <TextView android:id="@+id/txtHobList"
            android:layout_width="300dp"
            android:layout_height="wrap_content"
            android:textSize="20sp"
            android:text="@string/hobList"/>
    </LinearLayout>
</ScrollView>

程序代码：

public class MainActivity extends Activity {

    private CheckBox chbMusic, chbSing, chbDance, chbTravel, chbReading, chbWriting, chbClimbing,
            chbSwim, chbExercise, chbFitness, chbPhoto, chbEating, chbPainting;

    private Button btnSelOK;
    private TextView txtHobList;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        setupViewComponent();
    }

    private void setupViewComponent()
    {
        chbMusic = (CheckBox)findViewById(R.id.chbMusic);
        chbSing = (CheckBox)findViewById(R.id.chbSing);
        chbDance = (CheckBox)findViewById(R.id.chbDance);
        chbTravel = (CheckBox)findViewById(R.id.chbTravel);
        chbReading = (CheckBox)findViewById(R.id.chbReading);
        chbWriting = (CheckBox)findViewById(R.id.chbWriting);
        chbClimbing = (CheckBox)findViewById(R.id.chbClimbing);
        chbSwim = (CheckBox)findViewById(R.id.chbSwim);
        chbExercise = (CheckBox)findViewById(R.id.chbExercise);
        chbFitness = (CheckBox)findViewById(R.id.chbFitness);
        chbPhoto = (CheckBox)findViewById(R.id.chbPhoto);
        chbEating = (CheckBox)findViewById(R.id.chbEating);
        chbPainting = (CheckBox)findViewById(R.id.chbPainting);
        btnSelOK = (Button) findViewById(R.id.btnSelOK);
        txtHobList = (TextView) findViewById(R.id.txtHobList);

        btnSelOK.setOnClickListener(btnSelOKOnClick);
    }

    private Button.OnClickListener btnSelOKOnClick = new Button.OnClickListener()
    {
        public void onClick(View v)
        {
            String s = getString(R.string.hobList);
            if(chbMusic.isChecked())
            {
                s += chbMusic.getText().toString();
            }

            if(chbSing.isChecked())
            {
                s += chbSing.getText().toString();
            }

            if(chbDance.isChecked())
            {
                s += chbDance.getText().toString();
            }

            if(chbTravel.isChecked())
            {
                s += chbTravel.getText().toString();
            }

            if(chbReading.isChecked())
            {
                s += chbReading.getText().toString();
            }

            if(chbWriting.isChecked())
            {
                s += chbWriting.getText().toString();
            }

            if(chbClimbing.isChecked())
            {
                s += chbClimbing.getText().toString();
            }

            if(chbSwim.isChecked())
            {
                s += chbSwim.getText().toString();
            }

            if(chbExercise.isChecked())
            {
                s += chbExercise.getText().toString();
            }

            if(chbFitness.isChecked())
            {
                s += chbFitness.getText().toString();
            }

            if(chbPhoto.isChecked())
            {
                s += chbPhoto.getText().toString();
            }

            if(chbEating.isChecked())
            {
                s += chbEating.getText().toString();
            }

            if(chbPainting.isChecked())
            {
                s += chbPainting.getText().toString();
            }

            txtHobList.setText(s);
        }
    };
}

效果图：