從主要活動傳遞數據到基礎適配器一個

Question

我想將editText1.getText（）。toString（）的值傳遞給基礎適配器，以便將此值與「num」進行比較。 ¿我該怎麼做？

這裏是我的2個活動：

公共類MyActivity延伸活動{

private ListView mList; 
private ArrayList<String> arrayList; 
private MyCustomAdapter mAdapter; 
private TCPClient mTcpClient; 
private Double comp; 


String info; 

@Override 
public void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 




    final EditText editText1 = (EditText) findViewById(R.id.editText1); 

      editText1.setOnKeyListener(new OnKeyListener() { 

       @Override 
       public boolean onKey(View arg0, int arg1, KeyEvent arg2) { 
       if (arg1 == KeyEvent.KEYCODE_ENTER){ 
        Toast.makeText(
          editText1.getContext() 
          , "Write: " + editText1.getText().toString() 
          , Toast.LENGTH_SHORT) 
          .show(); 
        return true; 
       } 
       return false; 
       } 
      }); 
    double comp=Double.parseDouble(editText1.getText().toString()); 

    arrayList = new ArrayList<String>(); 





    //relate the listView from java to the one created in xml 
    mList = (ListView)findViewById(R.id.list); 
    mAdapter = new MyCustomAdapter(this, arrayList, comp); 
    mList.setAdapter(mAdapter); 

    // connect to the server 
    new connectTask().execute(""); 





} 



public class connectTask extends AsyncTask<String,String,TCPClient> { 

    @Override 
    protected TCPClient doInBackground(String... message) { 

     //we create a TCPClient object and 
     mTcpClient = new TCPClient(new TCPClient.OnMessageReceived() { 
      @Override 
      //here the messageReceived method is implemented -->TCPClient.java 
      public void messageReceived(String message) { 
       //this method calls the onProgressUpdate 
       publishProgress(message); 
      } 
     }); 
     mTcpClient.run(); 

     return null; 
    } 

    @Override 
    protected void onProgressUpdate(String... values) { 
     super.onProgressUpdate(values); 


     //in the arrayList we add the messaged received from server 
     arrayList.add(values[0]); 
     // notify the adapter that the data set has changed. This means that new message received 
     // from server was added to the list 
     mAdapter.notifyDataSetChanged(); 


    } 
} 

}

公共類MyCustomAdapter延伸BaseAdapter {

private ArrayList<String> mListItems; 
private LayoutInflater mLayoutInflater; 
private Double comp; 



public MyCustomAdapter(Context context, ArrayList<String> arrayList, Double compa){ 

    mListItems = arrayList; 

    comp = compa; 
    //get the layout inflater 
    mLayoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 


} 

@Override 
public int getCount() { 
    //getCount() represents how many items are in the list 
    return mListItems.size(); 
} 


@Override 
    //get the data of an item from a specific position 
    //i represents the position of the item in the list 
public Object getItem(int i) { 
    return null; 
} 

@Override 
    //get the position id of the item from the list 
public long getItemId(int i) { 
    return 0; 
} 






@Override 


public View getView(int position, View view, ViewGroup viewGroup) { 


    //check to see if the reused view is null or not, if is not null then reuse it 
    if (view == null) { 
     view = mLayoutInflater.inflate(R.layout.list_item, null); 
    } 

    //get the string item from the position "position" from array list to put it on the TextView 
    String stringItem = mListItems.get(position); 



    if (stringItem != null) { 

     TextView itemName = (TextView) view.findViewById(R.id.list_item_text_view); 


     if (itemName != null) { 
      //set the item name on the TextView 
      itemName.setText(stringItem); 
      double num=Double.parseDouble(stringItem); 
      if (num>comp) { 

       itemName.setText(stringItem); 

      } 


      else { 
       itemName.setBackgroundColor(Color.BLUE); 
       itemName.setText(stringItem); 

      } 
     } 
    } 

    //this method must return the view corresponding to the data at the specified position. 
    return view; 

} 

}

Answer 1

在您的MyCustomAdapter中添加方法setData()，並從您的主要活動中調用它。

public class MyCustomAdapter extends BaseAdapter { 
    Vector listData = null; 

    public void setData(Vector data) { 
     listData = data; 
    } 
}