Android(安卓)应用软件开发（九）控件续

TextView

EditBox

Button

RadioGroup

RadioBox

CheckBox

ProgressBar

ListView

下面是关于RadioBox和CheckBox的用法

注意控件使用的顺序：

1. 什么控件变量

2. 通过控件的ID获取控件句柄

3. 绑定监听器（注意RadioGroup是使用自己定义的内部类而CheckBox是使用公用的CompoundButton的公用类）

<RadioGroup     android:id="@+id/genderGroup"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_below="@+id/cancel"    android:orientation="vertical">    <RadioButton     android:id="@+id/maleButton"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="@string/male"    />    <RadioButton     android:id="@+id/femaleButton"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="@string/female"    /></RadioGroup><CheckBox     android:id="@+id/swim"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_below="@+id/genderGroup"    android:text="swim"/><ProgressBar     android:id="@+id/firstBar"    style="?android:attr/progressBarStyleHorizontal"    android:layout_width="200dp"    android:layout_height="wrap_content"    android:layout_below="@+id/swim"    android:max="200"    android:visibility="gone"/><ProgressBar     android:id="@+id/secondBar"    style="?android:attr/progressBarStyle"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_below="@+id/firstBar"    android:visibility="gone"/><Button     android:id="@+id/beginButton"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:layout_below="@+id/secondBar"    android:text="begin"/>

genderGroup = (RadioGroup)findViewById(R.id.genderGroup);femaleButton = (RadioButton)findViewById(R.id.femaleButton);maleButton = (RadioButton)findViewById(R.id.maleButton);swim = (CheckBox)findViewById(R.id.swim);        genderGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(RadioGroup group, int checkedId) {// TODO Auto-generated method stubif(femaleButton.getId()==checkedId){System.out.println("female");Toast.makeText(TableTestActivity.this,"female",Toast.LENGTH_SHORT).show();}else if(maleButton.getId()==checkedId){System.out.println("male");}}});swim.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {// TODO Auto-generated method stubif(isChecked)System.out.println("swim button has been selected");elseSystem.out.println("swim button has not been selected");}});

class beginListener implements OnClickListener{@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubif(0==i){firstBar.setProgress(i);//firstBar.setSecondaryProgress(i+2);secondBar.setProgress(i);firstBar.setVisibility(View.VISIBLE);secondBar.setVisibility(View.VISIBLE);}else if(i<200){firstBar.setProgress(i);//firstBar.setSecondaryProgress(i+2);secondBar.setProgress(i);}else{firstBar.setVisibility(View.INVISIBLE);secondBar.setVisibility(View.INVISIBLE);i=-10;}i=i+10;}

ListView控件的用法比较特殊

1. 需要至少两个布局文件，一个用于窗口的整体布局，一个用于ListView内部的布局

2. 其Activity需要继承自ListActivity

见下例

main.xml:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <ListView        android:id="@+id/android:list"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:drawSelectorOnTop="false"        android:scrollbars="vertical"/></LinearLayout>

user.xml:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="horizontal"    android:paddingLeft="1dip"    android:paddingRight="10dip"    android:paddingTop="1dip"    android:paddingBottom="1dip">    <TextView        android:id="@+id/user_name"        android:layout_width="180dip"        android:layout_height="30dip"        android:textSize="10pt"        android:singleLine="true"/>    <TextView        android:id="@+id/user_id"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:textSize="10pt"        android:gravity="right"/></LinearLayout>

Activity05.java:

package my.activity;import java.util.ArrayList;import java.util.HashMap;import android.app.ListActivity;import android.os.Bundle;import android.view.View;import android.widget.ListView;import android.widget.SimpleAdapter;public class Activity05 extends ListActivity {    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        ArrayList<HashMap<String,String>> list= new ArrayList<HashMap<String,String>>();        HashMap<String,String> map1=new HashMap<String,String>();        HashMap<String,String> map2=new HashMap<String,String>();        HashMap<String,String> map3=new HashMap<String,String>();        map1.put("user_name", "zhangsan");        map1.put("user_id", "192.168.0.1");        map2.put("user_name", "lisi");        map2.put("user_id", "192.168.0.2");        map3.put("user_name", "wangwu");        map3.put("user_id", "192.168.0.3");        list.add(map1);        list.add(map2);        list.add(map3);        SimpleAdapter listAdapter = new SimpleAdapter(this, list,         R.layout.user, new String[]{"user_name","user_id"},         new int[]{R.id.user_name,R.id.user_id});        setListAdapter(listAdapter);    }@Overrideprotected void onListItemClick(ListView l, View v, int position, long id) {// TODO Auto-generated method stubsuper.onListItemClick(l, v, position, id);System.out.println("position~~~~~~~~~~"+position);System.out.println("id~~~~~~~~~~~~~~~~"+id);}}

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