我们先来看下面这张图片：
这张图片显示了Android提供的Activity类。
下面是程序清单：
Ex003_06Activity Java code
public class ExpandableListActivityTest extends ExpandableListActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ExpandableListAdapter adapter = new BaseExpandableListAdapter() {
int[] logos = new int[] { R.drawable.p, R.drawable.z, R.drawable.t };
private String[] armTypes = new String[] { "神族兵种", "虫族兵种", "人族兵种" };
private String[][] arms = new String[][] {
{ "狂战士", "龙骑士", "黑暗圣堂", "电兵" },
{ "小狗", "刺蛇", "飞龙", "自爆飞机" }, { "机枪兵", "护士MM", "幽灵" } };
// 获取指定组位置、指定子列表项处的子列表项数据
@Override
public Object getChild(int groupPosition, int childPosition) {
return arms[groupPosition][childPosition];
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public int getChildrenCount(int groupPosition) {
return arms[groupPosition].length;
}
private TextView getTextView() {
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, 64);
TextView textView = new TextView(
ExpandableListActivityTest.this);
textView.setLayoutParams(lp);
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
textView.setPadding(36, 0, 0, 0);
textView.setTextSize(20);
return textView;
}
// 该方法决定每个子选项的外观
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
TextView textView = getTextView();
textView.setText(getChild(groupPosition, childPosition)
.toString());
return textView;
}
// 获取指定组位置处的组数据
@Override
public Object getGroup(int groupPosition) {
return armTypes[groupPosition];
}
@Override
public int getGroupCount() {
return armTypes.length;
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
// 该方法决定每个组选项的外观
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
LinearLayout ll = new LinearLayout(
ExpandableListActivityTest.this);
ll.setOrientation(0);
ImageView logo = new ImageView(ExpandableListActivityTest.this);
logo.setImageResource(logos[groupPosition]);
ll.addView(logo);
TextView textView = getTextView();
textView.setText(getGroup(groupPosition).toString());
ll.addView(textView);
return ll;
}
@Override
public boolean isChildSelectable(int groupPosition,
int childPosition) {
return true;
}
@Override
public boolean hasStableIds() {
return true;
}
};
// 设置该窗口显示列表
setListAdapter(adapter);
}
}
ExpandableListActivityTest Java code
public class ExpandableListActivityTest extends ExpandableListActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ExpandableListAdapter adapter = new BaseExpandableListAdapter() {
int[] logos = new int[] { R.drawable.p, R.drawable.z, R.drawable.t };
private String[] armTypes = new String[] { "神族兵种", "虫族兵种", "人族兵种" };
private String[][] arms = new String[][] {
{ "狂战士", "龙骑士", "黑暗圣堂", "电兵" },
{ "小狗", "刺蛇", "飞龙", "自爆飞机" }, { "机枪兵", "护士MM", "幽灵" } };
// 获取指定组位置、指定子列表项处的子列表项数据
@Override
public Object getChild(int groupPosition, int childPosition) {
return arms[groupPosition][childPosition];
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public int getChildrenCount(int groupPosition) {
return arms[groupPosition].length;
}
private TextView getTextView() {
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.FILL_PARENT, 64);
TextView textView = new TextView(
ExpandableListActivityTest.this);
textView.setLayoutParams(lp);
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
textView.setPadding(36, 0, 0, 0);
textView.setTextSize(20);
return textView;
}
// 该方法决定每个子选项的外观
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
TextView textView = getTextView();
textView.setText(getChild(groupPosition, childPosition)
.toString());
return textView;
}
// 获取指定组位置处的组数据
@Override
public Object getGroup(int groupPosition) {
return armTypes[groupPosition];
}
@Override
public int getGroupCount() {
return armTypes.length;
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
// 该方法决定每个组选项的外观
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
LinearLayout ll = new LinearLayout(
ExpandableListActivityTest.this);
ll.setOrientation(0);
ImageView logo = new ImageView(ExpandableListActivityTest.this);
logo.setImageResource(logos[groupPosition]);
ll.addView(logo);
TextView textView = getTextView();
textView.setText(getGroup(groupPosition).toString());
ll.addView(textView);
return ll;
}
@Override
public boolean isChildSelectable(int groupPosition,
int childPosition) {
return true;
}
@Override
public boolean hasStableIds() {
return true;
}
};
// 设置该窗口显示列表
setListAdapter(adapter);
}
}
PreferenceActivityTest Java code
public class PreferenceActivityTest extends PreferenceActivity
{
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// 设置显示参数设置布局。
addPreferencesFromResource(R.xml.preferences);
}
}
preferences.xml code
<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >
<!-- 设置系统铃声 -->
<RingtonePreference
android:key="ring_key"
android:ringtoneType="all"
android:showDefault="true"
android:showSilent="true"
android:summary="选择铃声（测试RingtonePreference)"
android:title="设置铃声" >
</RingtonePreference>
<PreferenceCategory android:title="个人信息设置zu" >
<!-- 通过输入框填写用户名 -->
<EditTextPreference
android:dialogTitle="您所使用的用户名为："
android:key="name"
android:summary="填写您的用户名（测试EditTextPreference)"
android:title="填写用户名" />
<!-- 通过列表框选择性别 -->
<ListPreference
android:dialogTitle="ListPreference"
android:entries="@array/gender_name_list"
android:entryValues="@array/gender_value_list"
android:key="gender"
android:summary="选择您的性别（测试ListPreference）"
android:title="性别" />
</PreferenceCategory>
<PreferenceCategory android:title="系统功能设置组 " >
<CheckBoxPreference
android:defaultValue="true"
android:key="autoSave"
android:summaryOff="自动保存: 关闭"
android:summaryOn="自动保存: 开启"
android:title="自动保存进度" />
</PreferenceCategory>
</PreferenceScreen>
preferences.xml定义了一个参数设置界面
我们还需要在AndroidManifest.xml文件中设置下：
<!-- 定义两个Activity -->
<activity
android:name=".ExpandableListActivityTest"
android:label="查看星际兵种" >
</activity>
<activity
android:name=".PreferenceActivityTest"
android:label="设置程序参数" >
</activity>
下面我们来看下程序运行后的结果：
点击设置参数后的界面是：
点击查看星际兵种的界面是：
本程序运行后将会在data/data/com.android.Ex003_06/shared_prefs/路径下生成一个/com.android.Ex003_06_preferences.xml文件。打开DDMS的File Explorer面板即可在里面找到。