ArrayAdapter <HashMap<,,>>與commonsguy EndlessAdapter類

Question

如何使用ArrayAdapter-HashMap-與EndlessAdapter類？

class DemoAdapter extends EndlessAdapter { 
     private RotateAnimation rotate=null; 

     @SuppressWarnings("unchecked") 
     ArrayAdapter<HashMap<String,String>> a=(ArrayAdapter<HashMap<String,String>>)getWrappedAdapter(); 

     DemoAdapter(ArrayList<HashMap<String, String>> items) { 
     super(new ArrayAdapter<HashMap<String, String>>(Base.this, 
              R.layout.row, 
              android.R.id.text1, <------ ???? 
              items)); <------ ???? 

我有我行R.layout.text1和R.layout.text2兩列。

我看到幾個例子PROJECTION_COLUMNS和VIEW_MAPPINGS，但不知道如何正確使用它。

下面是完整的代碼，它的工作，但我得到的列表視圖（文本）類似{test2的= dasdasd，TEST1 = asdasd}：

import com.commonsware.cwac.endless.EndlessAdapter; 

import java.util.ArrayList; 
import java.util.HashMap; 

public class Read extends ListActivity { 

     EndlessAdapter x; 
     SQLiteDatabase Db;  
     public Cursor c; 
     Integer cx; 

     String Hash; 

     @Override 
     public void onCreate(Bundle icicle) { 
     super.onCreate(icicle); 
     setContentView(R.layout.readmain); 

     Hash = getIntent().getStringExtra("Hash"); 
     cx = getIntent().getIntExtra("Count", 0); 

     Db = openOrCreateDatabase("/sdcard/test.db", SQLiteDatabase.CREATE_IF_NECESSARY, null); 

     ArrayList<HashMap<String,String>> items=new ArrayList<HashMap<String,String>>(); 

     x = new DemoAdapter(items); 
     setListAdapter(x); 
     } 


     class DemoAdapter extends EndlessAdapter { 
     private RotateAnimation rotate=null; 

     @SuppressWarnings("unchecked") 
     ArrayAdapter<HashMap<String,String>> a=(ArrayAdapter<HashMap<String,String>>)getWrappedAdapter(); 


      DemoAdapter(ArrayList<HashMap<String, String>> items) { 


      super(new ArrayAdapter<HashMap<String, String>>(ReadChat.this, 
              R.layout.row, 
              R.id.textas1, 
              items)); 

      rotate=new RotateAnimation(0f, 360f, Animation.RELATIVE_TO_SELF, 
             0.5f, Animation.RELATIVE_TO_SELF, 
             0.5f); 
      rotate.setDuration(600); 
      rotate.setRepeatMode(Animation.RESTART); 
      rotate.setRepeatCount(Animation.INFINITE); 
     } 

     @Override 
     protected View getPendingView(ViewGroup parent) { 
      View row=getLayoutInflater().inflate(R.layout.row, null); 

      View child=row.findViewById(R.id.textas1); 

      child.setVisibility(View.GONE); 

      child=row.findViewById(R.id.throbber); 
      child.setVisibility(View.VISIBLE); 
      child.startAnimation(rotate); 

      return(row); 
     } 

     @Override 
     protected boolean cacheInBackground() { 
      c = Db.rawQuery("SELECT a, b FROM TableLIMIT "+a.getCount()+", 15",null); 

      return(getWrappedAdapter().getCount()< cx); 
     } 

     @Override 
     protected void appendCachedData() { 

      String a; 
       String b; 

      if (c != null) { 
       if (c.moveToFirst()) { 
         do { 
          a = c.getString(c.getColumnIndex("a")); 
          b = c.getString(c.getColumnIndex("b")); 

          HashMap<String, String> temp = new HashMap<String, String>();       
           temp.put("test1", a); 
           temp.put("test2", b);       
           a.add(temp); 

        } while (c.moveToNext()); 
       } 
      } 
     } 
     } 
    } 

Answer 1

你的問題都無關EndlessAdapter。

首先，讓你的代碼與ArrayAdapter工作，現在忽略EndlessAdapter。這將要求您學習如何創建自定義ArrayAdapter，因爲您很快就會發現ArrayAdapter對如何使用HashMap<String, String>知之甚少。您將需要擴展ArrayAdapter你自己WhateverThisIsAdapter，在那裏你重寫getView()處理來自您的HashMap<String, String>澆數據到膨脹行，妥善處理你的行回收。 This free excerpt從one of my books將演示這一些。

那時，只有到那時，在EndlessAdapter換工作ArrayAdapter。

另外，不要硬線路徑，爲/sdcard是錯誤的大多數Android設備上。