當一個微調項目被選中列表不會改變

Question

我有一個活動，有一個微調選擇一天和一個列表，應顯示列表項目根據從微調選擇的項目列表項目。

我在查詢sqlite數據庫，不同的查詢必須用於微調器上選擇的不同項目。

我正在使用一個簡單的遊標適配器。

我爲我的微調器設置了onItemSelected(AdapterView<?> parent，View view，int position，long id）。在此我檢查選定的微調項目是否等於今天。

如果是這樣，我需要更改顯示的列表。

我的問題是無論選擇什麼微調項目，列表都會保持不變。它不會改變。

請注意，我的微調和列表在同一頁上。有人能爲此提出一個解決方案嗎？

public class RecentJobListActivity extends Activity { 

    ListView listView ; 
    private Spinner spinner; 
    private TakenJobDataBaseOpenHelper jobDatabaseHelper; 
    private Cursor cursor; 
    SimpleCursorAdapter cursoradapter; 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_recent_job_list); 

     addItemsOnSpinner(); 

     //This is the database helper class  
     jobDatabaseHelper = new TakenJobDataBaseOpenHelper(this); 


     String[] fromColumns = {TakenJobDataBaseOpenHelper.TAKENJOBS_COLUMN_RequestID,TakenJobDataBaseOpenHelper.TAKENJOBS_COLUMN_Destination,TakenJobDataBaseOpenHelper.TAKENJOBS_COLUMN_CustomerName}; 
     int[] toViews = {R.id.singleRequestID, R.id.singleDestination,R.id.singleCustomerName}; 

       //when the page first loads the result of queru getAlljobs() will be shown.this works 
      cursor = jobDatabaseHelper.getAllJobs(); 


      cursoradapter = new SimpleCursorAdapter(this, 
       R.layout.single_job_activity, cursor, fromColumns, toViews, 0); 

     listView = (ListView)findViewById(R.id.activities_list); 
     listView.setAdapter(cursoradapter); 

    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 

     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.recent_job_list, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 
     if (id == R.id.action_settings) { 
      return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 

public void addItemsOnSpinner(){ 

     spinner = (Spinner) findViewById(R.id.time_periods_spinner);  
     ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, 
       R.array.time_periods_array, android.R.layout.simple_spinner_item); 
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
     // Apply the adapter to the spinner 
     spinner.setAdapter(adapter); 

     spinner.setOnItemSelectedListener(new OnItemSelectedListener() { 

      @Override 
      public void onItemSelected(AdapterView<?> parent, View view, 
        int position, long id) { 
       // TODO Auto-generated method stub 

       String s = parent.getItemAtPosition(position).toString(); 

       //even the log doesn't show. 
       if(s.equals("Today")){ 
        Log.d("today","today"); 
        cursor = jobDatabaseHelper.getTodayJobs(); 
        cursoradapter.notifyDataSetChanged(); 

       } 


      } 

      @Override 
      public void onNothingSelected(AdapterView<?> arg0) { 
       // TODO Auto-generated method stub 

      } 
     }); 


    } 

} 

謝謝！

Answer 1

嘗試使用CursorAdapter.swapCursor（）。這應該工作。