1.網格視圖（GridView）
GridView用於在界面上按行、列分佈的方式來顯示多個組件。
GridView和ListView有共同的父類：AbsListView，所以它們有很高的相似性。ListView相當於一種特殊的GridView。
GridView也需要Adapter來提供顯示的數據。
實例：帶預覽的圖片瀏覽器
界面佈局文件代碼：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
>
<!-- 定義一個GridView組件 -->
<GridView
android:id="@+id/grid1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:horizontalSpacing="1pt"
android:verticalSpacing="1pt"
android:numColumns="4"
android:gravity="center"
></GridView>
<!-- 定義一個ImageView組件 -->
<ImageView
android:id="@+id/image1"
android:layout_width="240dp"
android:layout_height="240dp"
android:layout_gravity="center_horizontal"
/>
</LinearLayout>PS：以上代碼簡單定義了一個GridView、一個ImageView。屬性android：numColumns=“4”，
意味着網格包含4列，行數由Adapter決定。
Activity代碼清單：
public class GridViewT extends Activity {
GridView grid1;
ImageView image1;
int[] imageIds = new int[]
{
R.drawable.p00, R.drawable.p01, R.drawable.p02,
R.drawable.p03, R.drawable.p04, R.drawable.p05,
R.drawable.p06, R.drawable.p07, R.drawable.p08,
R.drawable.p09, R.drawable.p10, R.drawable.p11
};
@Override
protected voidonCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.grid_view_t);
//創建一個List對象，List對象的元素是Map
List<Map<String, Object>>listItems =
new ArrayList<Map<String,Object>>();
for(int i = 0; i< imageIds.length; i++)
{
Map<String, Object> listItem =new HashMap<String, Object>();
listItem.put("image", imageIds[i]);
listItems.add(listItem);
}
//獲取顯示圖片的ImageView
image1 = (ImageView) findViewById(R.id.image1);
image1.setImageResource(imageIds[0]);
//創建SimpleAdapter
SimpleAdapter simpleAdapter = new SimpleAdapter(this,
listItems,
//使用cell.xml文件作爲界面佈局
R.layout.cell, new String[] {"image"},
new int[]{R.id.image});
grid1 = (GridView) findViewById(R.id.grid1);
grid1.setAdapter(simpleAdapter);
//添加列表項被選中的監聽器
grid1.setOnItemSelectedListener(new OnItemSelectedListener()
{
@Override
public void onItemSelected(AdapterView<?> parent, View view,
int position, long id) {
// 顯示當前被選中的圖片
image1.setImageResource(imageIds[position + 1]);
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
//添加列表項被單擊的監聽器
grid1.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
//顯示被單擊的圖片
image1.setImageResource(imageIds[position]);
}
});
}
}Ps:在layout目錄下定義一個cell.xml界面佈局，包含一個簡單ImageView組件。
顯示效果：
2.可展開的列表組件（ExpandableListView）
ExpandableListView是ListView的子類，它把應用中的列表項分成幾組，每組裏又可包含多個列表項。列表項由ExpandableListAdapter提供。
實例：
界面佈局文件:在LinearLayout內定義一個ExpandableListView
Activity代碼清單：
public class ExpandableLiestViewT extends Activity {
@Override
protected voidonCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.expandable_liest_view_t);
//創建一個BaseExpandableListAdapter對象
ExpandableListAdapter adapter = new BaseExpandableListAdapter()
{
int[] logos = new int[]
{
R.drawable.p,
R.drawable.z,
R.drawable.t
};
private String[] armTypes = new String[]
{"神族兵種", "蟲族兵種", "人族兵種"};
private String[][] arms = new String[][]
{
{"狂戰士", "龍騎士", "黑暗聖堂", "閃電兵"},
{"天狗", "刺蛇", "飛龍", "自爆精靈"},
{"機槍兵", "護士mm", "幽靈"},
};
//獲取指定組件位置、指定子列表處的子列表數據
@Override
public Object getChild(int groundPosition, int childPosition)
{
return arms[groundPosition][childPosition];
}
@Override
public long getChildId(int groupPosion, int childPosion)
{
return childPosion;
}
@Override
public int getChildrenCount(int groupPosition){
return arms[groupPosition].length;
}
private TextView getTextView()
{
AbsListView.LayoutParams lp = new AbsListView.LayoutParams(
ViewGroup.LayoutParams.MATCH_PARENT, 64);
TextView textView = new TextView(ExpandableLiestViewT.this);
textView.setLayoutParams(lp);
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.LEFT);
textView.setPadding(36, 0, 0,0);
textView.setTextSize(20);
return textView;
}
//該方法決定每個子選項的外觀
@Override
public View getChildView(int groupPosition, int childPosition,
boolean isLastChild, View convertView, ViewGroupparent) {
TextView textView =getTextView();
textView.setText(getChild(groupPosition,childPosition).toString());
return textView;
}
//獲取指定組位置處的組數據
@Override
public Object getGroup(int groupPosition) {
return armTypes[groupPosition];
}
@Override
public int getGroupCount() {
return armTypes.length;
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
//該方法決定每個組選項的外觀
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroupparent) {
LinearLayout ll = new LinearLayout(ExpandableLiestViewT.this);
ll.setOrientation(0);
ImageView logo = new ImageView(ExpandableLiestViewT.this);
logo.setImageResource(logos[groupPosition]);
ll.addView(logo);
TextView textView =getTextView();
textView.setText(getGroup(groupPosition).toString());
ll.addView(textView);
return ll;
}
@Override
public boolean hasStableIds() {
return true;
}
@Override
public boolean isChildSelectable(int groupPosition,
int childPosition) {
return true;
}
};
ExpandableListView expandableListView =(ExpandableListView) findViewById
(R.id.list);
expandableListView.setAdapter(adapter);
}
}PS：上面代碼通過擴展BaseExpandableListAdapter來實現ExpandableListAdapter, 擴展BaseExpandableListAdapter時關鍵有如下四個方法：
l getGroupCount():該方法返回包含的組列表項的數量
l getGroupView():該方法返回的View對象將作爲組列表項
l getChildrenCount():該方法返回特定組所包含的子列表項的數量
l getChildView():該方法返回的View對象將作爲特定組、特定位置的子列表項
由於在界面佈局文件的ExpandableListView中添加了android:childIndicator="@drawable/ic_launcher"， 所以在子列表項左邊會有圖標。
顯示效果：
