สอบถามหน่อยครับเกี่ยวกับ android ปัญหาการใช้ edittext กับ Spinner ร่วมกันในการ search ข้อมูล ผ่าน webserver

package com.app.mobilerest;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class OrderDetail extends Activity {


	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.ECLAIR
				&& (keyCode == KeyEvent.KEYCODE_BACK)
				&& event.getRepeatCount() == 0) {
			onBackPressed();
		}
		return super.onKeyDown(keyCode, event);
	}

	@Override
	public void onBackPressed() {
		Toast.makeText(OrderDetail.this, "Back", Toast.LENGTH_SHORT).show();
		Intent newActivity = new Intent(OrderDetail.this, TakeOrder.class);
		startActivity(newActivity);
		finish();

		return;
	}

	public String rUserID,rProductCode,rProductName,rOrderUnit,rOrderPrice,rOrderQty,rProductUrl,rRemark;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.order_detail);
		Intent intent= getIntent();
    	rUserID = intent.getStringExtra("sUserID"); 
    	rProductCode = intent.getStringExtra("sProductCode"); 
    	rProductName = intent.getStringExtra("sProductName"); 
    	rOrderUnit = intent.getStringExtra("sOrderUnit"); 
    	rOrderPrice = intent.getStringExtra("sOrderPrice"); 
    	rOrderQty = intent.getStringExtra("sOrderQty");  	
    	rProductUrl = intent.getStringExtra("sProductUrl"); 
    	rRemark = intent.getStringExtra("sRemark");

    	// Product Name
    	TextView txtName = (TextView)findViewById(R.id.textView2);
    	txtName.setText(rProductName+"("+rOrderUnit+")");
    	
    	// Product Price
    	TextView txtPrice = (TextView)findViewById(R.id.textView4);
    	txtPrice.setText(rOrderPrice);

    	
    	ImageView image = (ImageView) findViewById(R.id.imageView1);   	
        image.setImageBitmap((Bitmap)loadBitmap(rProductUrl));
        
       	// Product Order Qty
    	TextView txtOrderQty = (TextView)findViewById(R.id.edtOrderQty);
    	txtOrderQty.setText(rOrderQty);

    	
       	// Product Order Qty
    	TextView txtRemark = (TextView)findViewById(R.id.edtRemark);
    	txtRemark.setText(rRemark);

        // Incress Order Quantity
        final Button btnInc = (Button) findViewById(R.id.bntInc);
        // Perform action on click
        btnInc.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	// to do
            	TextView txtOrderQty = (TextView)findViewById(R.id.edtOrderQty);
            	txtOrderQty.setText(rOrderQty+1);

            	
            }        
        });   
        
        // Decress Order Quantity
        final Button btnDec = (Button) findViewById(R.id.bntInc);
        // Perform action on click
        btnInc.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            	// to do
            	TextView txtOrderQty = (TextView)findViewById(R.id.edtOrderQty);
            	txtOrderQty.setText(rOrderQty+1);

            	
            }        
        });    	


	}
	
  	/***** Get Image Resource from URL (Start) *****/
	private static final String TAG = "Image";
	private static final int IO_BUFFER_SIZE = 4 * 1024;
	public static Bitmap loadBitmap(String url) {
	    Bitmap bitmap = null;
	    InputStream in = null;
	    BufferedOutputStream out = null; 

	    try {
	        in = new BufferedInputStream(new URL(url).openStream(), IO_BUFFER_SIZE);

	        final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
	        out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
	        copy(in, out);
	        out.flush();

	        final byte[] data = dataStream.toByteArray();
	        BitmapFactory.Options options = new BitmapFactory.Options();
	        //options.inSampleSize = 1;

	        bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
	    } catch (IOException e) {
	        Log.e(TAG, "Could not load Bitmap from: " + url);
	    } finally {
	        closeStream(in);
	        closeStream(out);
	    }

	    return bitmap;
	}

	 private static void closeStream(Closeable stream) {
	        if (stream != null) {
	            try {
	                stream.close();
	            } catch (IOException e) {
	                android.util.Log.e(TAG, "Could not close stream", e);
	            }
	        }
	    }
	 
	 private static void copy(InputStream in, OutputStream out) throws IOException {
     byte[] b = new byte[IO_BUFFER_SIZE];
     int read;
     while ((read = in.read(b)) != -1) {
         out.write(b, 0, read);
     }
 }
	 /***** Get Image Resource from URL (End) *****/

	 
	// end main
}