看这篇博文前，推荐先看本博文的姊妹篇（点击即可）
Android Gallery广告(仿网易)完美PopupWindow（记住用户名模拟）
最近看网易新闻，，发现网易的界面相当漂亮，我也很想用反编译来查看源码，弄的我蛋痛，不行啊。我就直接自己写了一个下拉刷新来模拟。
为了便于理解，先上我的的代码测试效果图片：
代码部分如下：
package com.jefry;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.widget.ImageView;import android.widget.ProgressBar;import android.widget.ScrollView;import android.widget.TextView;public class NetNewDemo extends Activity {public static ImageView fresh = null;View mRefreshView;int top = 0;int first = 0;TextView mRefreshViewText;ImageView mRefreshViewImage;ImageView mImageView;ProgressBar mRefreshViewProgress;TextView mRefreshViewLastUpdated;Handler hand = new Handler(){public void handleMessage(android.os.Message msg) {mRefreshViewImage.setVisibility(View.GONE);mImageView.setVisibility(View.GONE);mRefreshView.setPadding(mRefreshView.getPaddingLeft(),0,mRefreshView.getPaddingRight(),mRefreshView.getPaddingBottom());}};@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);mRefreshView = (View)findViewById(R.id.layout);mRefreshViewImage = (ImageView) findViewById(R.id.pull_to_refresh_image);mImageView = (ImageView)findViewById(R.id.going);ScrollView sc = (ScrollView)findViewById(R.id.scroll);sc.setOnTouchListener(new View.OnTouchListener() {public boolean onTouch(View arg0, MotionEvent event) {Log.i("TAG", "=============onTouchEvent=================");//当前手指的Y值final int y = (int) event.getY();// mRefreshViewImage.setImageResource(R.drawable.fresh_going);switch (event.getAction()) {case MotionEvent.ACTION_UP:try{first = 0;mRefreshViewImage.setImageResource(R.drawable.fresh_going);mRefreshView.setPadding(mRefreshView.getPaddingLeft(),0,mRefreshView.getPaddingRight(),mRefreshView.getPaddingBottom());new Thread(new Runnable() {public void run() {try {Thread.sleep(1500);} catch (InterruptedException e) {}hand.sendEmptyMessage(1);}}).start();}catch (Exception e) {}break;case MotionEvent.ACTION_DOWN:first = y;break;case MotionEvent.ACTION_MOVE:mImageView.setVisibility(View.GONE);int instance = y-first;if(instance>0 && instance < 30) {mRefreshViewImage.setVisibility(View.VISIBLE);mRefreshViewImage.setImageResource(R.drawable.down);} else if(instance >=30){mRefreshViewImage.setVisibility(View.VISIBLE);mRefreshViewImage.setImageResource(R.drawable.fresh_before);}mRefreshView.setPadding(mRefreshView.getPaddingLeft(),instance,mRefreshView.getPaddingRight(),mRefreshView.getPaddingBottom());//mRefreshViewImage.setImageResource(R.drawable.fresh_going);break;}return true;}});}@Overridepublic boolean onTouchEvent(MotionEvent event) {Log.i("TAG", "=============onTouchEvent=================");//当前手指的Y值final int y = (int) event.getY();switch (event.getAction()) {case MotionEvent.ACTION_UP:first = 0;prepareForRefresh(); //准备刷新break;case MotionEvent.ACTION_DOWN:first = y;break;case MotionEvent.ACTION_MOVE://更行头视图的toppadding 属性Log.i("TAG", "=============ACTION_MOVE============" + (y – first));mRefreshView.setPadding(mRefreshView.getPaddingLeft(),(y – first),mRefreshView.getPaddingRight(),mRefreshView.getPaddingBottom());//applyHeaderPadding(event);break;}return super.onTouchEvent(event);}public void prepareForRefresh() {resetHeaderPadding(); //初始化，头部文件mRefreshViewImage.setVisibility(View.GONE);mRefreshViewImage.setImageDrawable(null);mRefreshViewProgress.setVisibility(View.VISIBLE);mRefreshViewText.setText("Jefry ");}private void resetHeaderPadding() {mRefreshView.setPadding(mRefreshView.getPaddingLeft(),0,mRefreshView.getPaddingRight(),mRefreshView.getPaddingBottom());}}
由于篇幅原因，我只贴出了部分代码。如果觉得上面的代码看起来比较繁琐，需要这个Demo项目源码的同志们，就留下邮箱。
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人的一生要疯狂一次，无论是为一个人，一段情，一段旅途，或一个梦想。
