Question

我在将值从对话框中的textview传递到asynctask以添加到数据库时遇到问题，这里是代码：

public void addfooddialog(View v){
     final Dialog dialog = new Dialog(context);
     dialog.setContentView(R.layout.addfooddialog);
     dialog.setTitle("Insert food");
     dialog.setCancelable(false);
     dialog.show();
     Button b = (Button)dialog.findViewById(R.id.addfood);
     b.setOnClickListener(new OnClickListener(){
             public void onClick(View v) {
              new add().execute();
               }
         });
    }

这是扩展AsyncTask的类

   class add extends AsyncTask<String, String, String> {
    Dialog d= new Dialog(context);
    @Override
    protected void onPreExecute() {
       super.onPreExecute();
       d.setContentView(R.layout.addfooddialog);
       Log.i("","ata3 men hon");

    }

    @Override
    protected String doInBackground(String... arg0) {

        TextView title= (TextView)d.findViewById(R.id.plattername);
        TextView description= (TextView) d.findViewById(R.id.description);
        TextView price= (TextView)d. findViewById(R.id.price);
            String foodname = title.getText().toString();
            String fooddescription = description.getText().toString();
                    String foodprice = price.getText().toString();

        // Building Parameters
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("title", foodname));
        params.add(new BasicNameValuePair("description", fooddescription));
        params.add(new BasicNameValuePair("price", foodprice));

        // getting JSON Object
        // Note that create product url accepts POST method
        JSONObject json = jsonParser.makeHttpRequest(url_add,
                "POST", params);
        final String TAG_SUCCESS = "success";

        // check log cat fro response
        Log.d("Create Response", json.toString());

        // check for success tag
        try {
            int success = json.getInt(TAG_SUCCESS);

            if (success == 1) {
                // successfully created product
                Log.i("sucees","---------------------------------");

                // closing this screen
                finish();
            } else {
                // failed to create product
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }

        return null;
    }

}
   }

现在我知道正在重新创建对话框，这就是值返回null的原因，但是如何将值直接传递给asynctask类？

提前谢谢

Answer 1

你可以创建全局变量，从EditText获取值并使用AsyncTask类中的变量

将Textview中的值传递给Asynctask

1 个答案: