二级横向菜单实现——ListView

实现类似于大众点评客户端的横向listview二级列表

这种横向的listview二级列表在手机软件上还不太常见，但是使用过平板的都应该知道，在平板上市比较常见的。可能是因为平板屏幕比较大，而且也能展现更多的内容。

下面来看一下我的实现步骤。

首先自定义一个listview，代码如下：

1. public class MyListView extends ListView implements Runnable {
2. private float mLastDownY = 0f;
3. private int mDistance = 0;
4. private int mStep = 10;
5. private boolean mPositive = false;
6. public MyListView (Context context, AttributeSet attrs) {
7. super(context, attrs);
8. }
9. public MyListView (Context context, AttributeSet attrs, int defStyle) {
10. super(context, attrs, defStyle);
11. }
12. public MyListView (Context context) {
13. super(context);
14. }
15. @Override
16. public boolean onTouchEvent(MotionEvent event) {
17. switch (event.getAction()) {
18. case MotionEvent.ACTION_DOWN:
19. if (mLastDownY == 0f && mDistance == 0) {
20. mLastDownY = event.getY();
21. return true;
22. }
23. break;
24. case MotionEvent.ACTION_CANCEL:
25. break;
26. case MotionEvent.ACTION_UP:
27. if (mDistance != 0) {
28. mStep = 1;
29. mPositive = (mDistance >= 0);
30. this.post(this);
31. return true;
32. }
33. mLastDownY = 0f;
34. mDistance = 0;
35. break;
36. case MotionEvent.ACTION_MOVE:
37. if (mLastDownY != 0f) {
38. mDistance = (int) (mLastDownY - event.getY());
39. if ((mDistance < 0 && getFirstVisiblePosition() == 0 && getChildAt(0).getTop() == 0) || (mDistance > 0 && getLastVisiblePosition() == getCount() - 1)) {
40. mDistance /= 2;
41. scrollTo(0, mDistance);
42. return true;
43. }
44. }
45. mDistance = 0;
46. break;
47. }
48. return super.onTouchEvent(event);
49. }
50. public void run() {
51. mDistance += mDistance > 0 ? -mStep : mStep;
52. scrollTo(0, mDistance);
53. if ((mPositive && mDistance <= 0) || (!mPositive && mDistance >= 0)) {
54. scrollTo(0, 0);
55. mDistance = 0;
56. mLastDownY = 0f;
57. return;
58. }
59. mStep += 1;
60. this.postDelayed(this, 10);
61. }
62. }

然后看一下xml的布局：

1. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
2. xmlns:tools="http://schemas.android.com/tools"
3. android:orientation="horizontal"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent" >
6. <com.example.multilistview.MyListView
7. android:id="@+id/listView"
8. android:layout_width="wrap_content"
9. android:layout_height="wrap_content"
10. android:layout_weight="1"
11. android:choiceMode="singleChoice"
12. android:scrollbars="none"
13. android:divider="@drawable/listitem_divide"
14. android:listSelector="#00000000"
15. android:background="#e4e3de"
16. >
17. </com.example.multilistview.MyListView>
18. <com.example.multilistview.MyListView
19. android:id="@+id/subListView"
20. android:layout_width="wrap_content"
21. android:layout_height="wrap_content"
22. android:layout_weight="1"
23. android:background="#e4e3de"
24. >
25. </com.example.multilistview.MyListView>
26. </LinearLayout>

两个自定义的listview  横向布局，然后是父listview的适配器

1. public class MyAdapter extends BaseAdapter {
2. Context context;
3. LayoutInflater inflater;
4. String [] foods;
5. int last_item;
6. int [] images;
7. private int selectedPosition = -1;
8. public MyAdapter(Context context,String [] foods,int[] images){
9. this.context = context;
10. this.foods = foods;
11. this.images = images;
12. inflater=LayoutInflater.from(context);
13. }
14. @Override
15. public int getCount() {
16. // TODO Auto-generated method stub
17. return foods.length;
18. }
19. @Override
20. public Object getItem(int position) {
21. // TODO Auto-generated method stub
22. return position;
23. }
24. @Override
25. public long getItemId(int position) {
26. // TODO Auto-generated method stub
27. return position;
28. }
29. @Override
30. public View getView(int position, View convertView, ViewGroup parent) {
31. // TODO Auto-generated method stub
32. ViewHolder  holder = null;
33. if(convertView==null){
34. convertView = inflater.inflate(R.layout.mylist_item, null);
35. holder = new ViewHolder();
36. holder.textView =(TextView)convertView.findViewById(R.id.textview);
37. holder.imageView =(ImageView)convertView.findViewById(R.id.imageview);
38. holder.layout=(LinearLayout)convertView.findViewById(R.id.colorlayout);
39. convertView.setTag(holder);
40. }
41. else{
42. holder=(ViewHolder)convertView.getTag();
43. }
44. // 设置选中效果
45. if(selectedPosition == position)
46. {
47. holder.textView.setTextColor(Color.BLUE);
48. holder.layout.setBackgroundColor(Color.LTGRAY);
49. } else {
50. holder.textView.setTextColor(Color.WHITE);
51. holder.layout.setBackgroundColor(Color.TRANSPARENT);
52. }
53. holder.textView.setText(foods[position]);
54. holder.textView.setTextColor(Color.BLACK);
55. holder.imageView.setBackgroundResource(images[position]);
56. return convertView;
57. }
58. public static class ViewHolder{
59. public TextView textView;
60. public ImageView  imageView;
61. public LinearLayout layout;
62. }
63. public void setSelectedPosition(int position) {
64. selectedPosition = position;
65. }
66. }

对应的 item布局：

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:id="@+id/colorlayout"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent" >
6. <ImageView
7. android:id="@+id/imageview"
8. android:layout_width="wrap_content"
9. android:layout_height="wrap_content"
10. android:layout_marginLeft="10dip"
11. android:layout_marginTop="5dip"
12. />
13. <TextView
14. android:id="@+id/textview"
15. android:layout_width="wrap_content"
16. android:layout_height="wrap_content"
17. android:text=""
18. android:textSize="16dip"
19. android:layout_marginTop="8dip"
20. android:layout_marginLeft="8dip"
21. android:layout_marginBottom="8dip"/>
22. <!--  android:background="@drawable/selector"  自定义listview 样式-->
23. </LinearLayout>

然后是子适配器代码：

1. public class SubAdapter extends BaseAdapter {
2. Context context;
3. LayoutInflater layoutInflater;
4. String[][] cities;
5. public int foodpoition;
6. public SubAdapter(Context context, String[][] cities,int position) {
7. this.context = context;
8. this.cities = cities;
9. layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
10. this.foodpoition = position;
11. }
12. @Override
13. public int getCount() {
14. // TODO Auto-generated method stub
15. return cities.length;
16. }
17. @Override
18. public Object getItem(int position) {
19. // TODO Auto-generated method stub
20. return getItem(position);
21. }
22. @Override
23. public long getItemId(int position) {
24. // TODO Auto-generated method stub
25. return position;
26. }
27. @Override
28. public View getView(int position, View convertView, ViewGroup parent) {
29. // TODO Auto-generated method stub
30. ViewHolder viewHolder = null;
31. final int location=position;
32. if (convertView == null) {
33. convertView = layoutInflater.inflate(R.layout.sublist_item, null);
34. viewHolder = new ViewHolder();
35. viewHolder.textView = (TextView) convertView
36. .findViewById(R.id.textview1);
37. convertView.setTag(viewHolder);
38. } else {
39. viewHolder = (ViewHolder) convertView.getTag();
40. }
41. viewHolder.textView.setText(cities[foodpoition][position]);
42. viewHolder.textView.setTextColor(Color.BLACK);
43. return convertView;
44. }
45. public static class ViewHolder {
46. public TextView textView;
47. }
48. }

对应的xml布局：

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:layout_width="wrap_content"
4. android:layout_height="wrap_content"
5. >
6. <TextView
7. android:id="@+id/textview1"
8. android:layout_width="wrap_content"
9. android:layout_height="wrap_content"
10. android:text="aaaaa"
11. android:textSize="16dip"
12. android:layout_marginTop="10dip"
13. android:layout_marginLeft="8dip"
14. android:layout_marginBottom="8dip"/>
15. </LinearLayout>

最后看下主activity的实现代码

1. public class MainActivity extends Activity {
2. private MyListView listView;
3. private MyListView subListView;
4. private MyAdapter myAdapter;
5. private SubAdapter subAdapter;
6. String cities[][] = new String[][] {
7. new String[] {"全部美食", "本帮江浙菜", "川菜", "粤菜", "湘菜","东北菜","台湾菜","新疆/清真","素菜","火锅","自助餐","小吃快餐","日本","韩国料理",
8. "东南亚菜","西餐","面包甜点","其他"},
9. new String[] {"全部休闲娱乐","咖啡厅","酒吧","茶馆","KTV","电影院","游乐游艺","公园","景点/郊游","洗浴","足浴按摩","文化艺术",
10. "DIY手工坊","桌球馆","桌面游戏","更多休闲娱乐"},
11. new String[] {"全部购物", "综合商场", "服饰鞋包", "运动户外","珠宝饰品","化妆品","数码家电","亲子购物","家居建材"
12. ,"书店","书店","眼镜店","特色集市","更多购物场所","食品茶酒","超市/便利店","药店"},
13. new String[] {"全部休闲娱乐","咖啡厅","酒吧","茶馆","KTV","电影院","游乐游艺","公园","景点/郊游","洗浴","足浴按摩","文化艺术",
14. "DIY手工坊","桌球馆","桌面游戏","更多休闲娱乐"},
15. new String[] {"全","咖啡厅","酒吧","茶馆","KTV","游乐游艺","公园","景点/郊游","洗浴","足浴按摩","文化艺术",
16. "DIY手工坊","桌球馆","桌面游戏","更多休闲娱乐"},
17. new String[] {"全部","咖啡厅","酒吧","茶馆","电影院","游乐游艺","公园","景点/郊游","洗浴","足浴按摩","文化艺术",
18. "DIY手工坊","桌球馆","桌面游戏","更多休闲娱乐"},
19. new String[] {"全部休","咖啡厅","酒吧","茶馆","KTV","电影院","游乐游艺","公园","景点/郊游","洗浴","足浴按摩","文化艺术",
20. "DIY手工坊","桌球馆","桌面游戏","更多休闲娱乐"},
21. new String[] {"全部休闲","咖啡厅","酒吧","茶馆","KTV","电影院","游乐游艺","公园","景点/郊游","洗浴","足浴按摩","文化艺术",
22. "DIY手工坊","桌球馆","桌面游戏","更多休闲娱乐"},
23. new String[] {"全部休闲娱","咖啡厅","酒吧","茶馆","KTV","电影院","游乐游艺","公园","景点/郊游","洗浴","足浴按摩","文化艺术",
24. "DIY手工坊","桌球馆","桌面游戏"},
25. new String[] {"全部休闲娱乐","咖啡厅","酒吧","茶馆","KTV","电影院","游乐游艺","公园","景点/郊游","洗浴","足浴按摩","文化艺术",
26. "DIY手工坊","桌球馆","桌面游戏","更多休闲娱乐"},
27. new String[] {"全部休闲aaa","咖啡厅","酒吧","茶馆","KTV","电影院","游乐游艺","公园","景点/郊游","洗浴","足浴按摩","文化艺术",
28. "DIY手工坊","桌球馆","桌面游戏"},
29. };
30. String foods[] =new String []{"全部频道","美食","休闲娱乐","购物","酒店","丽人","运动健身","结婚","亲子","爱车","生活服务"};
31. int images[] = new int[]{R.drawable.ic_category_0,R.drawable.ic_category_10,R.drawable.ic_category_30,R.drawable.ic_category_20
32. ,R.drawable.ic_category_60,R.drawable.ic_category_50,R.drawable.ic_category_45,R.drawable.ic_category_50,R.drawable.ic_category_70,
33. R.drawable.ic_category_65,R.drawable.ic_category_80};
34. @Override
35. public void onCreate(Bundle savedInstanceState) {
36. super.onCreate(savedInstanceState);
37. setContentView(R.layout.activity_main);
38. init();
39. myAdapter=new MyAdapter(getApplicationContext(), foods, images);
40. listView.setAdapter(myAdapter);
41. selectDefult();
42. listView.setOnItemClickListener(new OnItemClickListener() {
43. @Override
44. public void onItemClick(AdapterView<?> arg0, View arg1, int position,
45. long arg3) {
46. // TODO Auto-generated method stub
47. final int location=position;
48. myAdapter.setSelectedPosition(position);
49. myAdapter.notifyDataSetInvalidated();
50. subAdapter=new SubAdapter(getApplicationContext(), cities, position);
51. subListView.setAdapter(subAdapter);
52. subListView.setOnItemClickListener(new OnItemClickListener() {
53. @Override
54. public void onItemClick(AdapterView<?> arg0, View arg1,
55. int position, long arg3) {
56. // TODO Auto-generated method stub
57. Toast.makeText(getApplicationContext(), cities[location][position], Toast.LENGTH_SHORT).show();
58. }
59. });
60. }
61. });
62. }
63. private void init(){
64. listView=(MyListView) findViewById(R.id.listView);
65. subListView=(MyListView) findViewById(R.id.subListView);
66. }
67. private void selectDefult(){
68. final int location=0;
69. myAdapter.setSelectedPosition(0);
70. myAdapter.notifyDataSetInvalidated();
71. subAdapter=new SubAdapter(getApplicationContext(), cities, 0);
72. subListView.setAdapter(subAdapter);
73. subListView.setOnItemClickListener(new OnItemClickListener() {
74. @Override
75. public void onItemClick(AdapterView<?> arg0, View arg1,
76. int position, long arg3) {
77. // TODO Auto-generated method stub
78. Toast.makeText(getApplicationContext(), cities[location][position], Toast.LENGTH_SHORT).show();
79. }
80. });
81. }
82. }

默认我选中了第0个，下面看一下运行效果：

【转】http://blog.csdn.net/wangkuifeng0118/article/details/8446661