pull+banner

Main_Activity

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.day1121.MainActivity">

    <com.handmark.pulltorefresh.library.PullToRefreshScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/pull">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
        <com.youth.banner.Banner
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:id="@+id/banner"></com.youth.banner.Banner>

        <com.example.day1121.Mylistview
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/lv">
        </com.example.day1121.Mylistview>
    </LinearLayout>

</com.handmark.pulltorefresh.library.PullToRefreshScrollView>


</LinearLayout>



main

package com.example.day1121;

import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.ScrollView;

import com.example.day1121.Adapter.MyAdapter;
import com.example.day1121.Bean.Result;
import com.example.day1121.Utils.MimageLoader;
import com.example.day1121.Utils.MyTask;
import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.ILoadingLayout;
import com.handmark.pulltorefresh.library.IPullToRefresh;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.handmark.pulltorefresh.library.PullToRefreshScrollView;
import com.youth.banner.Banner;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private Banner banner;
    private ListView lv;
    private PullToRefreshScrollView scrollview;
    private List<String> img_list;
    private List<Result.DataBean>list=new ArrayList<>();
    private MyAdapter myAdapter;

    private int startNum;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        banner=(Banner)findViewById(R.id.banner);
       lv=(ListView) findViewById(R.id.lv);
        scrollview=(PullToRefreshScrollView)findViewById(R.id.pull);

        bann();
        init();
        initRefreshScrollView();

        //请求数据
        addToTop();
    }

    private void addToTop() {
        MyTask myTask = new MyTask(new MyTask.Icallbacks() {
            @Override
            public void updataUiByjson(String jsonstr) {

                Gson gson = new Gson();
                Result result = gson.fromJson(jsonstr, Result.class);

                list = result.getData();

                setAdapter();
            }
        });
        myTask.execute("http://api.expoon.com/AppNews/getNewsList/type/1/p/1");
    }



    private void initRefreshScrollView() {
        scrollview.setMode(PullToRefreshBase.Mode.BOTH);
        //设置头尾布局显示的文本
        ILoadingLayout headerLables=scrollview.getLoadingLayoutProxy(true,false);
        headerLables.setPullLabel("下拉刷新");
        headerLables.setRefreshingLabel("正在刷新");
        headerLables.setReleaseLabel("松开刷新");

        ILoadingLayout footerLables=scrollview.getLoadingLayoutProxy(false,true);
        footerLables.setPullLabel("上拉加载");
        footerLables.setRefreshingLabel("正在加载");
        footerLables.setReleaseLabel("松开加载");

        //设置监听事件
      scrollview.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ScrollView>() {
            @Override
            public void onPullDownToRefresh(PullToRefreshBase<ScrollView> refreshView) {
                //下拉刷新
                addToTop();
                closeRefresh();
            }
            @Override
            public void onPullUpToRefresh(PullToRefreshBase<ScrollView> refreshView) {
                //上拉加载更多
                addToBottom();
                closeRefresh();
            }
        });
        }
    public void addToBottom(){
        startNum=startNum+20;
        MyTask myTask = new MyTask(new MyTask.Icallbacks() {
            @Override
            public void updataUiByjson(String jsonstr) {
                // Log.i("zzz",jsonstr);
                //创建Gson
                Gson gson = new Gson();
                Result result = gson.fromJson(jsonstr, Result.class);
                //将集合添加到list集合
                list = result.getData();
                // Log.i("aaa",list.toString());

                setAdapter();
            }
        });
        myTask.execute("http://api.expoon.com/AppNews/getNewsList/type/1/p/"+startNum);
    }

    public void closeRefresh(){
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                scrollview.onRefreshComplete();
            }
        },1000);
    }

    private void bann() {
        img_list = new ArrayList<>();
        img_list.add("http://pic8.nipic.com/20100701/5290458_114840036316_2.jpg");
        img_list.add("http://pic2.nipic.com/20090424/1468853_230119053_2.jpg");
        img_list.add("http://img3.3lian.com/2013/s1/20/d/57.jpg");
        img_list.add("http://pic39.nipic.com/20140226/18071023_164300608000_2.jpg");
        img_list.add("http://a0.att.hudong.com/15/08/300218769736132194086202411_950.jpg");

        banner.setImageLoader(new MimageLoader());
        banner.setImages(img_list);
        banner.setDelayTime(2000);
        banner.isAutoPlay(true);
        banner.start();

    }
            public void setAdapter(){
                if(myAdapter==null){
                    myAdapter = new MyAdapter(MainActivity.this,list);
                    lv.setAdapter(myAdapter);
                }else{
                    myAdapter.notifyDataSetChanged();
                }

            }
    private void init() {
        MyTask myTask = new MyTask(new MyTask.Icallbacks() {
            @Override
            public void updataUiByjson(String jsonstr) {
                // Log.i("zzz",jsonstr);
                //创建Gson
                Gson gson = new Gson();
                Result result = gson.fromJson(jsonstr, Result.class);
                //将集合添加到list集合
                list = result.getData();
                // Log.i("aaa",list.toString());
                //设置适配器
                setAdapter();
            }
        });
        myTask.execute("http://api.expoon.com/AppNews/getNewsList/type/1/p/1");

    }


}



Mylistview
package com.example.day1121;

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ListView;

/**
 * Created by DELL on 2017/10/24.
 */

public class Mylistview extends ListView {
    public Mylistview(Context context) {
        super(context);
    }

    public Mylistview(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public Mylistview(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
                MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }
}




Myadapter

package com.example.day1121.Adapter;

import android.content.Context;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.example.day1121.Bean.Result;
import com.example.day1121.R;
import com.example.day1121.Utils.ImageloaderUtil;
import com.nostra13.universalimageloader.core.ImageLoader;

import java.util.List;

/**
 * Created by 张世祥 on 2017/11/21.
 */

public class MyAdapter extends BaseAdapter {

    private List<Result.DataBean> list;
    private Context context;

    public MyAdapter(Context context, List<Result.DataBean> list) {
        this.list = list;
        this.context = context;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int i) {
        return list.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public View getView(int i, View convertView, ViewGroup viewGroup) {
        ViewHolder vh;
        if (convertView == null) {
            vh = new ViewHolder();
            convertView = View.inflate(context, R.layout.item_layout, null);
            vh.img = (ImageView) convertView.findViewById(R.id.image_view);
            vh.tv = (TextView) convertView.findViewById(R.id.text_title);
            convertView.setTag(vh);
        } else {
            vh = (ViewHolder) convertView.getTag();
        }

        vh.tv.setText(list.get(i).getNews_title());
        ImageLoader.getInstance().displayImage(list.get(i).getPic_url(), vh.img, ImageloaderUtil.getImageOptions());


        return convertView;
    }


    class ViewHolder {
        private ImageView img;
        private TextView tv;

    }
}

一、综合实战—使用极轴追踪方式绘制信号灯 实战目标:利用对象捕捉追踪和极轴追踪功能创建信号灯图形 技术要点:结合两种追踪方式实现精确绘图,适用于工程制图中需要精确定位的场景 1. 切换至AutoCAD 操作步骤: 启动AutoCAD 2016软件 打开随书光盘中的素材文件 确认工作空间为"草图与注释"模式 2. 绘图设置 1)草图设置对话框 打开方式:通过"工具→绘图设置"菜单命令 功能定位:该对话框包含捕捉、追踪等核心绘图辅助功能设置 2)对象捕捉设置 关键配置: 启用对象捕捉(F3快捷键) 启用对象捕捉追踪(F11快捷键) 勾选端点、中心、圆心、象限点等常用捕捉模式 追踪原理:命令执行时悬停光标可显示追踪矢量,再次悬停可停止追踪 3)极轴追踪设置 参数设置: 启用极轴追踪功能 设置角度增量为45度 确认后退出对话框 3. 绘制信号灯 1)绘制圆形 执行命令:"绘图→圆→圆心、半径"命令 绘制过程: 使用对象捕捉追踪定位矩形中心作为圆心 输入半径值30并按Enter确认 通过象限点捕捉确保圆形位置准确 2)绘制直线 操作要点: 选择"绘图→直线"命令 捕捉矩形上边中点作为起点 捕捉圆的上象限点作为终点 按Enter结束当前直线命令 重复技巧: 按Enter可重复最近使用的直线命令 通过圆心捕捉和极轴追踪绘制放射状直线 最终形成完整的信号灯指示图案 3)完成绘制 验证要点: 检查所有直线是否准确连接圆心和象限点 确认极轴追踪的45度增量是否体现 保存绘图文件(快捷键Ctrl+S)
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