java - 我如何让按钮执行这个方法

Question

这可能是一个 super 简单的答案，但当我按下按钮时，我的应用程序崩溃了。这是我尝试运行单击按钮的方法:

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", "AndDev is Cool!"));
        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
    }
} 

我确定我有:

 <uses-permission android:name="android.permission.INTERNET"></uses-permission>

这是我的主要 Activity :

 <Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/textView1"
    android:layout_below="@+id/textView1"
    android:layout_marginTop="16dp"
    android:onClick="postData"
    android:text="Button" />

Answer 1

方法的签名应该是

public void postData(View v)

另一件事，你不能在主 UI 线程中执行网络操作。使用AsyncTask相反