Android 防止多次点击提交数据

package com.test1.test;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;


public class MainActivity
        extends
        Activity
        implements
        OnClickListener
{
    private Button btn;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn = (Button) findViewById(R.id.test);
        btn.setOnClickListener(this);
    }
    
    long lastClick;
    
    @Override
    public void onClick(View v) {
        //大于一秒方个通过
        if (System.currentTimeMillis() - lastClick <= 1000)
        {
            showToast("点那么快干什么!!!");
            return;
        }
        lastClick = System.currentTimeMillis();
        showToast("是你点的我么...");
    }
    
    public void showToast(String str) {
        Toast.makeText(this, str, Toast.LENGTH_SHORT).show();
        
    }
}