android 小例之兩列菜單關聯

標籤：

因為項目需要，做了個簡單的菜單關聯，其實很簡單 左側是個listview 選中的時候重新整理右側關聯資料，類似網易新聞選擇訂閱頁面

這裡需要注意的是 在點擊完左側菜單列表的時候 直接右側重新整理會不一定出來資料，這個時候 將重新整理放到adapter裡面處理就可以了

廢話不說 直接代碼，代碼裡面有詳細備忘

// 總資料來源 選中顏色 左右列表適配器List<TwoListData> twoListDatas = new ArrayList<TwoListData>();private ColorStateList red;private ColorStateList black;private MyAdapter leftMyAdapter;private MyAdapter rightMyAdapter;// 左側和右側關聯資料List<String> leftString = new ArrayList<String>();List<String> rightString = new ArrayList<String>();// 右側列表private ListView lv_right;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.activity_two_list);Resources resource = (Resources) getResources();red = (ColorStateList) resource.getColorStateList(R.color.color_ff0000);black = (ColorStateList) resource.getColorStateList(R.color.color_000000);ListView lv_left = (ListView) this.findViewById(R.id.lv_regison);lv_right = (ListView) this.findViewById(R.id.lv_block);for (int i = 0; i < 10; i++) {twoListDatas.add(new TwoListData("left" + i));}leftString = getLeftData();rightString = twoListDatas.get(0).getRightDataList();leftMyAdapter = new MyAdapter(getLeftData());rightMyAdapter = new MyAdapter(rightString);lv_left.setAdapter(leftMyAdapter);lv_right.setAdapter(rightMyAdapter);// 左側列表選中時候 及時重新整理右側列表關聯資料lv_left.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {leftMyAdapter.setSelected(arg2);rightString = twoListDatas.get(arg2).getRightDataList();rightMyAdapter.setMydata(rightString);}});// 右側列表選中 顯示對應關聯資料lv_right.setOnItemClickListener(new OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {rightMyAdapter.setSelected(arg2);Toast.makeText(TwoListActivity.this,"選中了左邊第" + leftMyAdapter.selectedPos + "位置   右側的第" + arg2+"位置",Toast.LENGTH_LONG).show();}});}/** * 擷取左側資料 *  * @return */public List<String> getLeftData() {List<String> leftDataList = new ArrayList<String>();for (TwoListData mTwoListData : twoListDatas) {leftDataList.add(mTwoListData.getName());}return leftDataList;}/** * 適配器 *  * @author zxc *  */public class MyAdapter extends BaseAdapter {int selectedPos = 0;// 標識選中public List<String> getMydata() {return mydata;}public void setMydata(List<String> mydata) {this.mydata = mydata;notifyDataSetChanged();}private List<String> mydata;public MyAdapter(List<String> mydata) {this.mydata = mydata;}@Overridepublic int getCount() {return mydata.size();}@Overridepublic Object getItem(int position) {// TODO Auto-generated method stubreturn mydata.get(position);}@Overridepublic long getItemId(int position) {// TODO Auto-generated method stubreturn position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ViewHolder holder;if (convertView == null) {holder = new ViewHolder();convertView = LayoutInflater.from(TwoListActivity.this).inflate(R.layout.adp_two_list, null);holder.iv_title = (TextView) convertView.findViewById(R.id.adptv_title);convertView.setTag(holder);} else {holder = (ViewHolder) convertView.getTag();}holder.iv_title.setText(mydata.get(position));if (selectedPos == position) {holder.iv_title.setTextColor(red);} else {holder.iv_title.setTextColor(black);}return convertView;}private class ViewHolder {private TextView iv_title;}/** * 標識選中並重新整理 *  * @param po */public void setSelected(int po) {selectedPos = po;notifyDataSetChanged();}}

　　資料模型如下

public class TwoListData {private String name;// 標註private List<String> rightDataList;public TwoListData(String name) {this.name = name;setRightData(name, new Random().nextInt(15) + 1);// 隨機1到15}/** * 根據標註 添加右側關聯資料 *  * @param name * @param num */public void setRightData(String name, int num) {List<String> rightDataList = new ArrayList<String>();for (int i = 0; i < num; i++) {rightDataList.add(name + i);}setRightDataList(rightDataList);}public String getName() {return name;}public void setName(String name) {this.name = name;}public List<String> getRightDataList() {return rightDataList;}public void setRightDataList(List<String> rightDataList) {this.rightDataList = rightDataList;}}

　　

效果 

android 小例之兩列菜單關聯