城市选择

Java代码

public class MainActivity extends Activity {    private ListView citylist_lft;    private ListView citylist_right;    List<String> list = new ArrayList<>();    String[] letter = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K",            "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X",            "Y", "Z" };    String[] city = { "C", "B", "H", "G", "W", "C", "S", "S", "C", "W", "H",            "Z", "C", "D", "N", "L", "Q", "S", "S", "L", "N", "H", "X", "H",            "S", "Z", "G", "N", "J", "T", "S", "X", "A" };    String[] cityName = { "长沙", "北京", "杭州", "广州", "武汉", "重庆", "上海", "深圳", "长春",            "乌鲁木齐", "哈尔滨", "郑州", "成都", "大连", "南昌", "兰州", "齐齐哈尔", "汕头", "苏州",            "拉萨", "南京", "呼和浩特", "厦门", "合肥", "沈阳", "张家界", "贵州", "宁夏", "济南",            "天津", "石家庄", "西安", "澳门" };    private void initData() {        for (int i = 0; i < letter.length; i++) {            boolean flag = false;            for (int j = 0; j < city.length; j++) {                if (letter[i].equals(city[j])) {                    if (!flag) {                        flag = true;                        list.add(letter[i]);                    }                    list.add(cityName[j]);                }            }        }    }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        // 隐藏标题栏        requestWindowFeature(Window.FEATURE_NO_TITLE);        setContentView(R.layout.activity_main);        init();        initData();        citylist_lft.setAdapter(new MyBaseAdapter());        citylist_right.setAdapter(new MyBaseAdapter1());        citylist_lft.setOnItemClickListener(new OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view,                    int position, long id) {                boolean flag = true;                for (int i = 0; i < letter.length; i++) {                    if (letter[i].equals(list.get(position))) {                        flag = false;                        break;                    }                }                if (flag) {                    Toast.makeText(MainActivity.this, list.get(position), 0)                            .show();                }            }        });        citylist_right.setOnItemClickListener(new OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view,                    int position, long id) {                for (int i = 0; i < list.size(); i++) {                    if (letter[position].equals(list.get(i))) {                        // 根据索引跳到指定的位置                        citylist_lft.setSelection(i);                    }                }            }        });    }    /**     * 初始化控件     */    private void init() {        citylist_lft = (ListView) findViewById(R.id.citylist_lft);        citylist_right = (ListView) findViewById(R.id.citylist_right);    }    class MyBaseAdapter extends BaseAdapter {        @Override        public int getCount() {            return list.size();        }        @Override        public Object getItem(int position) {            return null;        }        @Override        public long getItemId(int position) {            return 0;        }        @Override        public int getItemViewType(int position) {            for (int i = 0; i < letter.length; i++) {                if (letter[i].equals(list.get(position))) {                    return 1;                }            }            return 2;        }        @Override        public int getViewTypeCount() {            // TODO Auto-generated method stub            return 5;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            String str = list.get(position);            int type = getItemViewType(position);            System.out.println(type + "");            ViewHolder1 vh1 = null;            ViewHolder2 vh2 = null;            if (convertView == null) {                switch (type) {                case 1:                    vh1 = new ViewHolder1();                    convertView = View.inflate(MainActivity.this,                            R.layout.item1, null);                    vh1.tv1 = (TextView) convertView                            .findViewById(R.id.item1_textview);                    convertView.setTag(vh1);                    break;                case 2:                    vh2 = new ViewHolder2();                    convertView = View.inflate(MainActivity.this,                            R.layout.item2, null);                    vh2.tv2 = (TextView) convertView                            .findViewById(R.id.item2_textview);                    convertView.setTag(vh2);                    break;                }            } else {                switch (type) {                case 1:                    vh1 = (ViewHolder1) convertView.getTag();                    break;                case 2:                    vh2 = (ViewHolder2) convertView.getTag();                    break;                }            }            switch (type) {            case 1:                System.out.println(vh1 + "vh1");                vh1.tv1.setText(str);                break;            case 2:                vh2.tv2.setText(str);                break;            default:                break;            }            System.out.println(convertView + "convertView");            return convertView;        }        class ViewHolder1 {            TextView tv1;        }        class ViewHolder2 {            TextView tv2;        }    }    class MyBaseAdapter1 extends BaseAdapter {        @Override        public int getCount() {            // TODO Auto-generated method stub            return letter.length;        }        @Override        public Object getItem(int position) {            // TODO Auto-generated method stub            return null;        }        @Override        public long getItemId(int position) {            // TODO Auto-generated method stub            return 0;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            String str = letter[position];            ViewHolder vh = null;            if (convertView == null) {                vh = new ViewHolder();                convertView = View.inflate(MainActivity.this, R.layout.item3,                        null);                vh.tv = (TextView) convertView                        .findViewById(R.id.item3_textview);                convertView.setTag(vh);            } else {                vh = (ViewHolder) convertView.getTag();            }            vh.tv.setText(str);            return convertView;        }        class ViewHolder {            TextView tv;        }    }}

布局文件
item1

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:minHeight="40dp"     android:background="#cccccc"    android:orientation="vertical" >    <TextView        android:id="@+id/item1_textview"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="123"         /></LinearLayout>

item2

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:minHeight="40dp"    android:orientation="vertical" >    <TextView        android:id="@+id/item2_textview"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="123"         /></LinearLayout>

item3

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:minHeight="40dp"    android:orientation="vertical" >    <TextView        android:layout_gravity="center_horizontal"        android:id="@+id/item3_textview"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="123"         /></LinearLayout>

效果图