进行api调用和android应用时出错

Question

i am new to android, im trying to api call with php , i have done one example for it, that work on another computer fine but same app package gives error in eclipse on my laptop.

public void postData() {
    // Create a new HttpClient and Post Header
    HttpClient httpclient = new DefaultHttpClient();
    HttpPost httppost = new HttpPost("http://www.yoursite.com/script.php");

    try {
        // Add your data
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
        nameValuePairs.add(new BasicNameValuePair("id", "12345"));
        nameValuePairs.add(new BasicNameValuePair("stringdata", "Hi"));
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

        // Execute HTTP Post Request
        HttpResponse response = httpclient.execute(httppost);

    } catch (ClientProtocolException e) {
        // TODO Auto-generated catch block
    } catch (IOException e) {
        // TODO Auto-generated catch block
    }
} ` 

hear is my error log, i got this much of errors.

Answer 1

//Try following way    
//List<NameValuePair> nameValuePairs 
HttpClient hc = new DefaultHttpClient();
HttpPost hp = new HttpPost(url);
UrlEncodedFormEntity obj=new UrlEncodedFormEntity(nameValuePairs);
obj.setChunked(true);
hp.setEntity(obj);
HttpResponse hr = hc.execute(hp);   
HttpEntity he = hr.getEntity(); 

Answer 2

Logcat is clear: Could not find a method postData(View) in the activity class . I guess you've used xml layout for setting button action.

In this case, just change your

public void postData() {
}

to

public void postData(View view) {
}

Note: setting button listeners this way isn't efficient.

Also, you should perform network operations on another thread - using network on main thread will raise NetworkOnMainThreadException on Android 3.0+