Question

我想将editText1.getText（）。toString（）的值传递给基本适配器，以便将此值与“num”进行比较。 ¿我该怎么做？

以下是我的两项活动：

公共类MyActivity扩展了Activity {

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();


    }
}

}

公共类MyCustomAdapter扩展了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setData()中添加方法MyCustomAdapter，然后从您的主要活动中调用它。

public class MyCustomAdapter extends BaseAdapter {
    Vector listData = null;

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

将数据从主活动传递到基础适配器1

1 个答案: