Question

我有这个错误
Cannot make a static reference to the non-static method findViewById(int) from the type Activity" in a second activity

第二项活动代码：

public class sendQuery extends main  {
/////////// Public method to send Query ///////////
public static String send(String query,Activity main) {
    String result = "0";
    InputStream is = null;
    String weekDayVal=null;
    //the query to send
    ArrayList<NameValuePair> querySend = new ArrayList<NameValuePair>();

    querySend.add(new BasicNameValuePair("querySend",query));

    //http post
    try{
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost("http://locali.altervista.org/php/locali.php");
        httppost.setEntity(new UrlEncodedFormEntity(querySend));
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        is = entity.getContent();
    }catch(Exception e){
        Log.e("log_tag", "Error in http connection "+e.toString());
    }

    //convert response to string
    try{
        BufferedReader reader = new BufferedReader(
                new InputStreamReader(is,"iso-8859-1"),8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
        is.close();
        result=sb.toString();
        try{
            JSONArray weekDetails = new JSONArray ( result); // Your response string
            for(int index=0;index < weekDetails.length();index++)
            {
            JSONObject tempWeekDetail = weekDetails.getJSONObject(index);
            weekDayVal = tempWeekDetail.getString("Lunedi");// Value for Monday
            //added this Log which you can view from LogCat. also changed above variable name
            Log.i("Resp Value","Moday Value "+weekDayVal);
            }
            }catch(Exception e)
            {

                TextView text = (TextView) main.findViewById(R.id.textView10);
                text.setText(weekDayVal);
            }
    }catch(Exception e){
        Log.e("log_tag", "Error converting result: "+e.toString());
    }

    Log.i("SendQUERY", result);
    return result;
}
  }

我是否首先将值传递给主要活动？
为什么我得到这个错误？
请帮我！感谢

修改

我有修改代码，现在是否正确？因为我没有在TextView中看到写作

Answer 1

您已将此方法声明为静态。

您的代码行

 TextView text = (TextView) findViewById(R.id.textView10);

这个

findViewById(int id)

来自Activity类，需要此类的实例才能使用。

Activity.findViewById(int id)

<强>解决方案：

您可以做的是为您的方法添加一个参数，如：

public static String send(String query,Activity yourActivity)

然后使用

 TextView text = (TextView) yourActivity.findViewById(R.id.textView10);

Answer 2

如果你有静态方法，你不能调用非静态方法。静态方法“存在”没有类的实例。非静态方法是类实例的“部分”。

Pass View，您要在其中查找View作为静态方法的参数。

public static String send(String query, View view) {
   ....

   view.findViewById(R.id.some_id);
   ....
}

无法对非静态方法findviewbyid（int）TextView进行静态引用

2 个答案: