我正在尝试创建一个嵌套类以使用 AsyncTask，但是 eclipse 在类 SendData 上给我一个错误，说“令牌“类”上的语法错误，无效类型”为什么它给我那个错误？
package com.example.myfirstapp;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import android.os.Bundle;
import android.app.Activity;
import android.view.MenuItem;
import android.support.v4.app.NavUtils;
import android.content.Intent;
import android.widget.TextView;
public class DisplayMessageActivity extends Activity {
String url = "http://www.mySIte.com/phpFIle";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
String message = intent.getStringExtra(MainActivity.EXTRA_MESSAGE);
TextView textView = new TextView(this);
textView.setTextSize(40);
textView.setText(message);
setContentView(textView);
new SendData().execute();
}
private class SendData() extends AsyncTask<Void, Void, Void>{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(url);
try{
List<NameValuePair> nameValues = new ArrayList<NameValuePair>(1);
nameValues.add(new BasicNameValuePair("id", "12345"));
httppost.setEntity(new UrlEncodedFormEntity(nameValues));
System.out.println("Before response");
HttpResponse response = httpclient.execute(httppost);
System.out.println("After response");
}catch(ClientProtocolException e){
e.printStackTrace();
}catch(IOException e){
e.printStackTrace();
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
}