当我按下按钮时，我试图检索 TextBox 值，但它不起作用。这是我的代码。任何的想法？
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.httpxml);
httpstuff = (TextView) findViewById(R.id.http);
client = new DefaultHttpClient();
button = (Button)findViewById(R.id.shoppingprice);
button.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
//shoppingapi price = new shoppingapi();
et=(EditText)findViewById(R.id.text);
txt=et.getText().toString();
}
});
new Read().execute("displayprice");
}
@SuppressLint("ShowToast")
public JSONObject productprice(String productname) throws ClientProtocolException,IOException,JSONException
{
StringBuilder url = new StringBuilder(URL);
url.append(productname);
url.append("&searchType=keyword&contentType=json");
HttpGet get = new HttpGet(url.toString());
HttpResponse r = client.execute(get);
int status = r.getStatusLine().getStatusCode();
Log.d("Price", "asdasd");
if(status == 200){
HttpEntity e = r.getEntity();
String data = EntityUtils.toString(e);
jObj = new JSONObject(data);
JSONObject jsonData = jObj.getJSONObject("mercadoresult");
JSONObject jsonProducts = jsonData.getJSONObject("products");
JSONArray jsonArray = jsonProducts.getJSONArray("product");
jsonArray = (JSONArray) jsonArray.get(1);
jObj = (JSONObject)jsonArray.get(0);
return jObj;
}
else
{
Toast.makeText(MainActivity.this,"error",Toast.LENGTH_LONG).show();
return null;
}
}
public class Read extends AsyncTask<String,Integer,String>
{
@Override
protected String doInBackground(String... params) {
try {
json = productprice(txt);
return json.getString("displayprice");
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
//e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
//e.printStackTrace();
} catch (JSONException e) {
// TODO Auto-generated catch block
//e.printStackTrace();
}
// TODO Auto-generated method stub
return null;
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
//super.onPostExecute(result);
//httpstuff.setText("The price of the Product is ");
httpstuff.setText(result);
httpstuff.setText(txt);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
它没有显示错误，但将txt值显示为空白