weixin_43788944的博客

MyHelper页窜见数据库和方法public class MyHelper extends SQLiteOpenHelper { public MyHelper(Context context) { super(context, "itcast.db", null, 1); } @Override public void onCreate(SQL...

前端<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+requ...

pageContext.setAttribute("page", "page");//1request.setAttribute("requset", "requset");//2session.setAttribute("session", "session");//3application.setAttribute("application", "application");//4...

Collections是Collection的工具类集合遍历的方法map.entrySet();2次封装HashMap进Set；

ArrayList类的常用方法LinkedList迭代器Iterator<String> iterator=list.iterator(); while(iterator.hasNext()){ System.out.print(iterator.next()+" "); ｝

package day5;import java.util.Calendar;import java.util.Scanner;public class date { public static void main(String[] args) { System.out.println("输入年"); String weet[]={"星期7","星期1","星期2...

layout布局<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:to...

布局文件<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools=...

布局文件<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_heigh...

Handler是一种异步回调机制，主要负责与子线程进行通信。– Handler机制主要包括四个关键对象：• Message：消息，它由MessageQueue统一列队，由Handler处理。• Handler：处理者，主要负责Message的发送以及处理。• MessageQueue：消息队列，主要用来存放Handler发送过来的消息， 并且按照先入先出的规则执行。• Looper：消息...

text1 中PersonDBOpenHelper页面 创建数据public class PersonDBOpenHelper extends SQLiteOpenHelper { //构造方法，调用此方法新建一个person.db的数据库并返回一个数据库帮助类的对象 public PersonDBOpenHelper(Context context) { su...

信息封装类SmsInfopublic class SmsInfo { private int _id; // 短信的主键 private String address; // 发送地址 private int type; // 类型 private String body;...

一.Filesaveqq页面public class Filesaveqq { //保存用户信息 public static boolean saveUserinfo(Context context ,String name,String poss){ try { FileOutputStream fos= context.openFileOu...

weather2.json页面[ {"id":"sh","temp":"20/30","name":"上海"}, {"id":"xm","temp":"10/100","name":"厦门"}, {"id":"fz","temp":"5/10","name":"福州"}]weatherService 页面 对json数据进行解析并返回public class weatherS...

1、startService方式开启服务的生命周期服务会执行onCreate() 和onStartCommand()方法，服务处于运行状态， 直到自身调用stopSelf()方法或者其他组件调用stopService()方法时服务停止， 最终被系统销毁。服务会长期的在后台运行，并且服务的状态与开启者的状态没有关系。public class MainActivity extends AppCo...

创建AutoReceiver继承于BroadcastReceiverpublic class AutoReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { Intent i=new Intent(context,MainAc...

一.RecycleView：RecycleAdapter适配器public class RecycleAdapter extends RecyclerView.Adapter<RecycleAdapter.AppViewHolder> { private ArrayList<App>apps; public RecycleAdapter(ArrayLi...

URL getUrl =new URL("http://www.weather.com.cn/data/sk/101230201.html"); //创建URl连接 HttpURLConnection connection = (HttpURLConnection) getUrl.openConnection(); //建立连接 connection.connect...