模拟新浪微博随便看看栏目ListView

  最近学习了ListView，想要尝试做一个“模拟新浪微博随便看看栏目”,希望可以和你们一起，愿我们在学习安卓的道路上越走越远······

   下载源代码：http://download.csdn.net/detail/hou1620089770/8656693点击打开链接

MainActivity.java

package bzu.edu.hou;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Random;

import bzu.edu.hou.adapter.ArticleAdapter;
import bzu.edu.hou.adapter.Messages;
import bzu.edu.hou.view.MyListView;
import android.R.integer;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;


import android.app.Activity;
import android.content.res.TypedArray;
import android.view.Menu;
import android.view.Window;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.LinearLayout;

public class MainActivity extends Activity {
	
	private MyListView mylistview=null;
	private List<Messages> list_msg=null;
	private BaseAdapter adapter=null;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_main);
		
		init();
		if(list_msg==null){
			getData();
		}
		
		
		adapter=new ArticleAdapter(this,list_msg);
		
		mylistview.setOnRershListener(new OnRershListener());//设置监听器
		mylistview.setAdapter(adapter);
	}
		


	private void getData() {
		// TODO Auto-generated method stub
		//获得xml的资源
		String names[];
		String article[];
		TypedArray img;
		int i;
		
		names=getResources().getStringArray(R.array.name);
		article=getResources().getStringArray(R.array.article);
		img=getResources().obtainTypedArray(R.array.head_photo);
		
		list_msg=new ArrayList<Messages>();
		for(i=0;i<names.length;i++){
			Messages message=new Messages();
			message.setImg(img.getDrawable(i));
			message.setName(names[i]);
			message.setArticel(article[i]);
			message.setRq("人气:"+String.valueOf(new Random().nextInt(1000)));
			Date date=new Date();
			SimpleDateFormat simple=new SimpleDateFormat("MM-dd");
			message.setTime(simple.format(date));
			list_msg.add(message);
		}
	}
	private void init() {
		// TODO Auto-generated method stub
		mylistview=(MyListView)findViewById(R.id.myListView1);
			}



	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	
	
	
	Handler handler=new Handler(new Handler.Callback() {
		@Override
		public boolean handleMessage(Message arg0) {
			// TODO Auto-generated method stub
			if(arg0.what==0){				
				//结束刷新
				mylistview.endOnRersh();
			}
			return false;
		}
	});
	
	//刷新接口实现类
	class OnRershListener implements OnRersh{
	    //实现刷新接口的 方法，，在MyList中会回调该方法。
		//模拟
		@Override
		public void OnRershListener() {
			// TODO Auto-generated method stub
			new Thread(new Run()).start();//启动一个线程
		}
	}

	//线程接口实现类
	class Run implements Runnable{
		@Override
		public void run() {
			// TODO Auto-generated method stub
			try {
				Thread.sleep(2000);
			} catch (Exception e) {
				// TODO: handle exception
				e.printStackTrace();
			}
			handler.sendEmptyMessage(0);
		}
	}

}
           

ArticleAdapter.java

package bzu.edu.hou.adapter;

import java.util.List;

import bzu.edu.hou.R;


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

public class ArticleAdapter extends BaseAdapter {
	private List<Messages> list_mes=null;
	private Context context;
	
	public ArticleAdapter(Context context,List<Messages> list_mes) {
		// TODO Auto-generated constructor stub
		this.list_mes=list_mes;
		this.context=context;
	}

	@Override
	public int getCount() {
		// TODO Auto-generated method stub
		return list_mes.size();
	}

	@Override
	public Object getItem(int position) {
		// TODO Auto-generated method stub
		return list_mes.get(position);
	}

	@Override
	public long getItemId(int position) {
		// TODO Auto-generated method stub
		return position;
	}

	@Override
	public View getView(int position, View convertView, ViewGroup parent) {
		// TODO Auto-generated method stub
		ListItem listitem;
		if(convertView==null)
		{
			convertView=(LinearLayout)LayoutInflater.from(context).inflate(R.layout.list_layout, null);
			
			listitem=new ListItem();
			listitem.img=(ImageView)convertView.findViewById(R.id.head_img);
			listitem.name=(TextView)convertView.findViewById(R.id.name);
			listitem.time=(TextView)convertView.findViewById(R.id.time);
			listitem.rq=(TextView)convertView.findViewById(R.id.rq);
			listitem.article=(TextView)convertView.findViewById(R.id.article);
		
			convertView.setTag(listitem);
		}else {
			listitem=(ListItem)convertView.getTag();
		}
		
		listitem.img.setImageDrawable(list_mes.get(position).getImg());
		listitem.name.setText(list_mes.get(position).getName());
		listitem.time.setText(list_mes.get(position).getTime());
		listitem.rq.setText(list_mes.get(position).getRq());
		listitem.article.setText(list_mes.get(position).getArticel());
		return convertView;
	}
	
	public class ListItem{
		ImageView img;
		TextView name;
		TextView time;
		TextView rq;
		TextView article;
	}
}
           

HeaderView.java

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

import bzu.edu.hou.R;
import android.content.Context;
import android.opengl.Visibility;

import android.view.LayoutInflater;
import android.view.View;
import android.view.animation.RotateAnimation;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.TextView;

public class HeaderView extends LinearLayout {
	private LinearLayout linear=null;
	
	//当前状态
	private int STATE=DOWN;
	//下拉状态
	public static final int DOWN=0;
	//上拉状态
	public static final int UP=1;
	//刷新状态
	public static final int UPDATA=2;
	
	//布局控件
	private TextView t1,t2=null;
	private ImageView img=null;
	private ProgressBar probar=null;
	
	//旋转动画对象
	private RotateAnimation rotate1,rotate2=null;
	
	public HeaderView(Context context) {
		super(context);
		// TODO Auto-generated constructor stub
		//初始化刷新头部
		initView(context);
	}

	private void initView(Context context) {
		// TODO Auto-generated method stub
		/*
		 1,加载header_view布局
		 2，初始化创建动画对象
		 * */
		linear=(LinearLayout)LayoutInflater.from(context).inflate(R.layout.header_view, null);//加载布局，第二个对象表示根视图，null表示此布局是根视图。
		LinearLayout.LayoutParams layoutparams=new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, 0);
		this.addView(linear, layoutparams);
		
		//初始化布局控件
		t1=(TextView)linear.findViewById(R.id.text);
		t2=(TextView)linear.findViewById(R.id.text1);
		img=(ImageView)linear.findViewById(R.id.pull);
		probar=(ProgressBar)linear.findViewById(R.id.progress);
		
		//创建动画对象
		rotate1 = new RotateAnimation(0, -180, 1, 0.5f, 1, 0.5f);//中点逆时针旋转180度。
		rotate2 = new RotateAnimation(-180, 0, 1, 0.5f, 1, 0.5f);
		rotate1.setDuration(200);
		rotate2.setDuration(200);
		rotate1.setFillAfter(true);
		rotate2.setFillAfter(true);
	}
	
	/**
	 * 设置view的高度
	 * */
	public void setHeaderViewHight(int height){
		if(height<0){
			height=0;
		}
		//获得HeaderView的布局设置
		LinearLayout.LayoutParams layp=(LayoutParams)linear.getLayoutParams();
		layp.height=height;
		//设置HeaderView的高度
		linear.setLayoutParams(layp);
	}

	public int getSTATE() {
		return STATE;
	}

	/**
	 * 根据父容器MyListView的触摸位移
	 * 设置HeaderView的显示条的状态
	 * */
	public void setSTATE(int sTATE) {
		//显示条的3种状态
		/*
		 * 1，下拉状态：
		 * 		显示img，隐藏进度条
		 * 		判断上一个状态，如果是上拉则开始动画2,回到原始状态（触摸移动发生时，有向上移动）。
		 * 2，刷新状态
		 * 		隐藏img，显示进度条
		 * 3，上拉状态
		 * 		显示img，隐藏进度条
		 * 		判断上一个状态，如果是下拉则开始动画1.
		 * */
		switch (sTATE) {
		case DOWN://下拉状态
			t1.setText("下拉刷新");
			
			img.setVisibility(View.VISIBLE);
			probar.setVisibility(View.GONE);
			switch (STATE) {//某一时刻  开始动画。
				case DOWN:
					break;
				case UP:
					img.startAnimation(rotate2);//如果上一个状态是下拉，则返回原始
					break;
			}
			break;
			
		case UPDATA:
			t1.setText("正在刷新");
			img.clearAnimation();//清除动画
			img.setVisibility(View.GONE);
			probar.setVisibility(View.VISIBLE);
			switch (STATE) {
				case DOWN:
					break;
				case UPDATA:
					break;
				case UP:
					break;
			}
			break;
		case UP:
			t1.setText("松开刷新");
			img.setVisibility(View.VISIBLE);
			probar.setVisibility(View.GONE);
			switch (STATE) {
				case DOWN:
					img.startAnimation(rotate1);//如果上一个状态是旋转上拉动画，
					break;
				case UPDATA:
					break;
				case UP:
					break;
		}
		break;
		}
		STATE = sTATE;//设置当前的状态
	}

	/**获得header的高度*/
	public float getHeaderViewHight() {
		// TODO Auto-generated method stub
		return linear.getHeight();
	}
	public void setTime(){
		Date date=new Date();
		SimpleDateFormat simple=new SimpleDateFormat("yyyy/MM/dd hh:mm:ss");
		String datatime=simple.format(date);
		t2.setText("刷新时间:"+datatime);
	}
}
           

MyListView.java

package bzu.edu.hou.view;

import bzu.edu.hou.OnRersh;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ListView;

public class MyListView extends ListView {
	
	private HeaderView head_view=null;
	//起始的y坐标
	private float pageY = 0f;
	//阻尼器
	private float DAMPER=1.25f;
	private OnRersh onRershListener=null;

	public MyListView(Context context, AttributeSet attrs) {
		super(context, attrs);
		// TODO Auto-generated constructor stub
		initView(context);
	}

	private void initView(Context context) {
		// TODO Auto-generated method stub
		head_view=new HeaderView(context);
		this.addHeaderView(head_view);
	}

	//触摸事件方法，发生屏幕按下、抬起、滑动，程序都回调该方法
	@Override
	public boolean onTouchEvent(MotionEvent ev) {
		// TODO Auto-generated method stub
		/**
		 一,判断用户触发事件的三种状态
		 	1，屏幕按下事件：
		 		屏幕按下时，获得用户在屏幕的起始y坐标
		 	2，屏幕移动事件：
		 		屏幕移动时，动态的变化HeaderVeiw的状态
		 		（1）获得移动的距离
		 		（2）获得最终的y坐标
		 		（3）首项item为HeaderView时，并且状态不是刷新，
		 			则调用setHeaderViewHight（）方法来设置高度，---设置状态
		 	3，屏幕抬起事件：
		 		屏幕抬起时：根据HeaderView当前显示条的状态判断是否刷新
		 		（1）获得HeaderView的状态,
		 			下拉时：不刷新
		 			上拉时：刷新
		 			刷新时：
		 * */
		switch (ev.getAction()) {
		
		case MotionEvent.ACTION_DOWN:
			pageY=ev.getY();
			break;
		case MotionEvent.ACTION_MOVE:
			float move=0;//移动的距离
			move=ev.getY()-pageY;
			pageY=ev.getY();
			
			if(head_view.getSTATE()!=HeaderView.UPDATA && getFirstVisiblePosition()==0 &&
						(move/DAMPER+head_view.getHeaderViewHight())>0){
				setHeaderViewHight(move/DAMPER);
				return true;
			}
			break;
		case MotionEvent.ACTION_UP:
			switch (head_view.getSTATE()) {
			case HeaderView.DOWN:
				//下拉显示状态，不刷新,高度0
				setHeaderViewHight(-head_view.getHeaderViewHight());
				break;
			case HeaderView.UPDATA:
				//刷新状态
				break;
			case HeaderView.UP:
				//开始刷新
				setHeaderViewHight(75-head_view.getHeaderViewHight());//设置HeaderView的高为75
				head_view.setSTATE(HeaderView.UPDATA);
				head_view.setTime();
				//调用刷新接口
				if(onRershListener!=null){
					onRershListener.OnRershListener();
				}
				break;
			}
			break;
		}
		return super.onTouchEvent(ev);
	}

	/**设置HeaderView的高度，并根据滑动位移，设置其状态*/
	private void setHeaderViewHight(float f) {
		// TODO Auto-generated method stub
		//设置HeaderView的高度  并给HeaderView设置不同的状态。（不同的状态显示不同的header样式）
		/*
		 * 
		 1, 调用Headeview的方法设置其高度
		 2，判断Headeview的状态不是UPDATA
		 	判断HeaderView的高度，来设置状态
		 	(1)距离大于60---设置UP
		 	(2)否则大于0---设置Down
		 */
		head_view.setHeaderViewHight((int)(f+head_view.getHeaderViewHight()));
		
		if(head_view.getSTATE()!=HeaderView.UPDATA){
			
			if(head_view.getHeaderViewHight()>75){
				head_view.setSTATE(HeaderView.UP);//上拉状态
			}else if(head_view.getHeaderViewHight()>0) {
				head_view.setSTATE(HeaderView.DOWN);
			}
		}
	}
	public void setOnRershListener(OnRersh onRershListener) {
		this.onRershListener = onRershListener;
	}
	/**结束刷新*/
	public void endOnRersh() {
		// TODO Auto-generated method stub
		//状态设置为Down（默认的初始状态），高度0
		head_view.setSTATE(HeaderView.DOWN);
		head_view.setHeaderViewHight(-(int)head_view.getHeaderViewHight());
	}
}
           

MainActivity.java

package com.example.listviewproject;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;

public class MainActivity extends Activity {

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

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

}
           

    现在还需要设置一个接口监听器

package bzu.edu.hou;

public interface OnRersh {
	//刷新接口的监听器
	public void OnRershListener();

}
           

建立一个实体类

package bzu.edu.hou.adapter;

import android.graphics.drawable.Drawable;

public class Messages {
	private Drawable img;
	private String name;
	private String time;
	private String rq;
	private String articel;
	
	public Drawable getImg() {
		return img;
	}
	public void setImg(Drawable img) {
		this.img = img;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getTime() {
		return time;
	}
	public void setTime(String time) {
		this.time = time;
	}
	public String getRq() {
		return rq;
	}
	public void setRq(String rq) {
		this.rq = rq;
	}
	public String getArticel() {
		return articel;
	}
	public void setArticel(String articel) {
		this.articel = articel;
	}
	

}