android - 保存 TouchListView 并在下次应用打开时打开它

Question

我需要帮助如何在拖放后保存 ListView 的订单。我的列表有项目(谷歌和雅虎)，当用户按下它们时，它会打开 www.google.com 或 www.yahoo.com。

所以现在每次我重新排序我的 ListView 并关闭应用程序时，它都会忘记我之前制作的订单并打开默认订单。

我的代码:

    private static String[] items={
        "Google",
                "Yahoo"};

    private static String[] links={
        "http://google.com",
                "http://yahoo.com};

    private IconicAdapter adapter=null;

    private IconicAdapter1 adapter2=null;

    ArrayList<String> array= new ArrayList<String>(Arrays.asList(items));

    private ArrayList<String> array2=new ArrayList<String>(Arrays.asList(links));


    /** Called when the activity is first created. **/
   @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);



        TouchListView tlv=(TouchListView)getListView();
        adapter=new IconicAdapter();
        adapter2=new IconicAdapter1();
        setListAdapter(adapter);
        setListAdapter(adapter2);

        tlv.setOnItemClickListener(itemclick);
        tlv.setDropListener(onDrop);

   }



        private TouchListView.DropListener onDrop=new TouchListView.DropListener() {
            @Override
            public void drop(int from, int to) {
                    String item=(String) adapter.getItem(from);

                    adapter.remove(item);
                    adapter.insert(item, to);

                    String link=(String) adapter2.getItem(from);
                    adapter2.remove(link);
                    adapter2.insert(link, to);


            }
        };

        private TouchListView.OnItemClickListener itemclick= new TouchListView.OnItemClickListener(){
            public void onItemClick(AdapterView<?> parent, View view,
                int from, long id) {

                String item = adapter.getItem(from);

            Toast.makeText(getBaseContext(), "you pick: "+item, Toast.LENGTH_SHORT).show();

                String link = adapter2.getItem(from);
                Intent showContent = new Intent(getApplicationContext(),
                        Web.class);
                showContent.setData(Uri.parse(link));
                startActivity(showContent);
            }
        };

        class IconicAdapter extends ArrayAdapter<String> {
            IconicAdapter() {
                super(MainScreen.this, R.layout.row, array);
            }

            public View getView(int position, View convertView,
                                                    ViewGroup parent) {
                View row=convertView;

                    if (row==null) {                                                    
                    LayoutInflater inflater=getLayoutInflater();

                    row=inflater.inflate(R.layout.row, parent, false);
                }

                TextView label=(TextView)row.findViewById(R.id.label);

                label.setText(array.get(position));

                return(row);

            }
        };

            class IconicAdapter1 extends ArrayAdapter<String> {
                IconicAdapter1() {
                    super(MainScreen.this, R.layout.row, array2);
                }

                public View getView(int position, View convertView,
                                                        ViewGroup parent) {
                    View row=convertView;

                    if (row==null) {                                                    
                        LayoutInflater inflater=getLayoutInflater();

                        row=inflater.inflate(R.layout.row, parent, false);
                    }

                    TextView label=(TextView)row.findViewById(R.id.label);

                    label.setText(array.get(position));

                    return(row);

                }
            }

Answer 1

既然您关心的是将项目的状态存储在列表中，那么如何将您的数据存储在 SQLite database 中呢？并使用 CursorAdapter ？您可以将订单存储为数据库中的一列。

不过一般来说，您需要注意明确保存您的应用程序状态。在这里查看更多详细信息:http://developer.android.com/guide/topics/data/data-storage.html