用安卓编写简易论坛app 怎么实现发帖功能

import java.text.SimpleDateFormat;
import java.util.Date;

import com.example.Service.tieziS;
import com.example.project.tiezi;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;

public class FatieActivity extends Activity {

private tieziS tie;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_fatie);

    tie=new tieziS(this);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.fatie, menu);
    return true;
}

public void fatie(View v){
    tiezi item;

    EditText title = (EditText) findViewById(R.id.ftitle);
    EditText content = (EditText) findViewById(R.id.fleirong);

    SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd HH:mm");

    Date now=new Date();

    String faTime=sdf.format(now);


    item=new tiezi(title.getText().toString(), content.getText().toString(), faTime, faTime,getIntent().getExtras().getString("uid") ,1);

    tie.fatie(item);
}

}