android 上拉刷新，下拉加载更多

package com.example.testrefreshlistview;

import java.util.Date;

import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.view.View.OnClickListener;

public class DropRefreshListView extends ListView implements OnScrollListener,OnClickListener
{
// 释放状态
public final static int RELEASE_To_REFRESH = 0;

// 下拉到刷新状态
public final static int PULL_To_REFRESH = 1;

// 正在刷新
public final static int REFRESHING = 2;

// 刷新完成
public final static int DONE = 3;

//上拉加载更多
//普通状态
public final static int MORE_DONE = 4;

//刷新状态
public final static int MORE_REFRESHING = 5;

private final static int RATIO = 3;

// 刷新箭头的宽度
private static final int ARROW_IMAGE_WIDTH = 70;

// 刷新箭头的高度
private static final int ARROW_IMAGE_HEIGHT = 50;

private LayoutInflater inflater;

// head xml
private LinearLayout headView;

private TextView tipsTextview;

private TextView lastUpdatedTextView;

private ImageView arrowImageView;

private ProgressBar progressBar;

// foot xml
private RelativeLayout footView;

private TextView mLoadMoreTextView;

private RelativeLayout mLoadMoreView;

private LinearLayout mLoadingView;

private RotateAnimation animation;

private RotateAnimation reverseAnimation;

private boolean isRecored;

// private int headContentWidth;

private int headContentHeight;

private int startY;

private int firstItemIndex;

private int state;

private int loadingMoreState;

private boolean isBack;

private OnRefreshListener refreshListener;

private boolean isRefreshable;

public static volatile boolean isPullRefresh = true;

public DropRefreshListView(Context context)
{
super(context);
init(context);
}

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

/**
* 初始化ListView
*
* @param context
*/
private void init(Context context)
{
// setCacheColorHint(context.getResources().getColor(R.color.transparent));
inflater = LayoutInflater.from(context);
headView = (LinearLayout) inflater
.inflate(R.layout.listview_head, null);
arrowImageView = (ImageView) headView
.findViewById(R.id.head_arrowImageView);
progressBar = (ProgressBar) headView
.findViewById(R.id.head_progressBar);
tipsTextview = (TextView) headView.findViewById(R.id.head_tipsTextView);
lastUpdatedTextView = (TextView) headView
.findViewById(R.id.head_lastUpdatedTextView);

footView = (RelativeLayout) inflater.inflate(R.layout.footer, null);

mLoadMoreTextView = (TextView) footView.findViewById(R.id.load_more_tv);
mLoadMoreView = (RelativeLayout) footView
.findViewById(R.id.load_more_view);

mLoadingView = (LinearLayout) footView
.findViewById(R.id.loading_layout);

mLoadMoreView.setOnClickListener(this);

addFooterView(footView);

// 设定箭头大小
arrowImageView.setMinimumWidth(ARROW_IMAGE_WIDTH);
arrowImageView.setMinimumHeight(ARROW_IMAGE_HEIGHT);

measureView(headView);
headContentHeight = headView.getMeasuredHeight();
// headContentWidth = headView.getMeasuredWidth();
headView.setPadding(0, -1 * headContentHeight, 0, 0);
headView.invalidate();
addHeaderView(headView, null, false);
setOnScrollListener(this);

animation = new RotateAnimation(0, -180,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
animation.setInterpolator(new LinearInterpolator());
animation.setDuration(250);
animation.setFillAfter(true);

reverseAnimation = new RotateAnimation(-180, 0,
RotateAnimation.RELATIVE_TO_SELF, 0.5f,
RotateAnimation.RELATIVE_TO_SELF, 0.5f);
reverseAnimation.setInterpolator(new LinearInterpolator());
reverseAnimation.setDuration(200);
reverseAnimation.setFillAfter(true);

state = DONE;
isRefreshable = false;

loadingMoreState = MORE_DONE;

}

public void onScroll(AbsListView arg0, int firstVisiableItem, int arg2,
int arg3)
{
firstItemIndex = firstVisiableItem;
}

public void onScrollStateChanged(AbsListView arg0, int arg1)
{
}

public boolean onTouchEvent(MotionEvent event)
{

if (!isRefreshable)
{
return super.onTouchEvent(event);
}

switch (event.getAction())
{
case MotionEvent.ACTION_DOWN:
if (firstItemIndex == 0 && !isRecored)
{
isRecored = true;
startY = (int) event.getY();
}
break;
case MotionEvent.ACTION_UP:
if (state != REFRESHING)
{
/*
* if (state == DONE) { }
*/
if (state == PULL_To_REFRESH)
{
state = DONE;
changeHeaderViewByState();
}
if (state == RELEASE_To_REFRESH)
{
state = REFRESHING;
changeHeaderViewByState();
isPullRefresh = true;
onRefresh();
}
}
isRecored = false;
isBack = false;
break;
case MotionEvent.ACTION_MOVE:
int tempY = (int) event.getY();
if (!isRecored && firstItemIndex == 0)
{
isRecored = true;
startY = tempY;
}
if (state != REFRESHING && isRecored)
{
if (state == RELEASE_To_REFRESH)
{
setSelection(0);
if (((tempY - startY) / RATIO < headContentHeight)
&& (tempY - startY) > 0)
{
state = PULL_To_REFRESH;
changeHeaderViewByState();
}
else if (tempY - startY <= 0)
{
state = DONE;
changeHeaderViewByState();
}
}
if (state == PULL_To_REFRESH)
{
setSelection(0);
if ((tempY - startY) / RATIO >= headContentHeight)
{
state = RELEASE_To_REFRESH;
isBack = true;
changeHeaderViewByState();
}
else if (tempY - startY <= 0)
{
state = DONE;
changeHeaderViewByState();
}
}
if (state == DONE)
{
if (tempY - startY > 0)
{
state = PULL_To_REFRESH;
changeHeaderViewByState();
}
}
if (state == PULL_To_REFRESH)
{
headView.setPadding(0, -1 * headContentHeight
+ (tempY - startY) / RATIO, 0, 0);
}
if (state == RELEASE_To_REFRESH)
{
headView.setPadding(0, (tempY - startY) / RATIO
- headContentHeight, 0, 0);
}
}
break;

default:
break;
}

return super.onTouchEvent(event);
}

/**
* 根据状�?改变下拉刷新的显�?
*/
private void changeHeaderViewByState()
{
switch (state)
{
case RELEASE_To_REFRESH:
arrowImageView.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.startAnimation(animation);
tipsTextview.setText(R.string.release_refresh);
break;
case PULL_To_REFRESH:
progressBar.setVisibility(View.GONE);
tipsTextview.setVisibility(View.VISIBLE);
lastUpdatedTextView.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.VISIBLE);
if (isBack)
{
isBack = false;
arrowImageView.clearAnimation();
arrowImageView.startAnimation(reverseAnimation);
tipsTextview.setText(R.string.dropdown_refresh);
}
else
{
tipsTextview.setText(R.string.dropdown_refresh);
}
break;
case REFRESHING:
headView.setPadding(0, 0, 0, 0);
progressBar.setVisibility(View.VISIBLE);
arrowImageView.clearAnimation();
arrowImageView.setVisibility(View.GONE);
tipsTextview.setText(R.string.loading);
lastUpdatedTextView.setVisibility(View.VISIBLE);
break;
case DONE:
headView.setPadding(0, -1 * headContentHeight, 0, 0);
progressBar.setVisibility(View.GONE);
arrowImageView.clearAnimation();
arrowImageView.setImageResource(R.drawable.arrow);
tipsTextview.setText(R.string.load_complete);
lastUpdatedTextView.setVisibility(View.VISIBLE);
break;
default:
break;
}
}

public void setStateWithShow(int state)
{
this.state = state;
changeHeaderViewByState();
}

public void setOnRefreshListener(OnRefreshListener refreshListener)
{
this.refreshListener = refreshListener;

isRefreshable = true;
}

public interface OnRefreshListener
{
void onRefresh();
void onLoadMore();
}

public void onRefreshComplete()
{
state = DONE;
lastUpdatedTextView.setText(R.string.last_update);
String temp = lastUpdatedTextView.getText().toString();
lastUpdatedTextView.setText(temp + new Date().toLocaleString());
changeHeaderViewByState();
}

private void onRefresh()
{
if (refreshListener != null)
{
refreshListener.onRefresh();
}
}

private void measureView(View child)
{
ViewGroup.LayoutParams p = child.getLayoutParams();
if (p == null)
{
p = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
}
int childWidthSpec = ViewGroup.getChildMeasureSpec(0, 0 + 0, p.width);
int lpHeight = p.height;
int childHeightSpec = 0;
if (lpHeight > 0)
{
childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight,
MeasureSpec.EXACTLY);
}
else
{
childHeightSpec = MeasureSpec.makeMeasureSpec(0,
MeasureSpec.UNSPECIFIED);
}
child.measure(childWidthSpec, childHeightSpec);
}

public void setAdapter(BaseAdapter adapter)
{
lastUpdatedTextView.setText("" + new Date().toLocaleString());
super.setAdapter(adapter);
}

private void updateLoadMoreViewState(int state) {
switch (state) {
// 普通状态
case MORE_DONE:
mLoadingView.setVisibility(View.GONE);
mLoadMoreTextView.setVisibility(View.VISIBLE);
mLoadMoreTextView.setText("查看更多");
break;
// 加载中状态
case MORE_REFRESHING:
mLoadingView.setVisibility(View.VISIBLE);
mLoadMoreTextView.setVisibility(View.GONE);
break;

default:
break;
}
loadingMoreState = state;
}

public void onLoadMoreComplete() {
updateLoadMoreViewState(DropRefreshListView.MORE_DONE);

}

@Override
public void onClick(View v)
{

if (refreshListener != null
&& loadingMoreState == DropRefreshListView.MORE_DONE) {
updateLoadMoreViewState(DropRefreshListView.MORE_REFRESHING);
isPullRefresh = false;
refreshListener.onLoadMore();// 对外提供方法加载更多.
}

}
}

package com.example.testrefreshlistview;import java.util.ArrayList;import java.util.List;import com.example.testrefreshlistview.DropRefreshListView.OnRefreshListener;import android.os.AsyncTask;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.app.Activity;import android.util.Log;import android.view.Menu;import android.view.View;import android.view.ViewGroup;import android.widget.ArrayAdapter;import android.widget.BaseAdapter;import android.widget.ListView;public class MainActivity extends Activity{private final String TAG = "MainActivity";private DropRefreshListView dropRefreshListView;private TestAdapter textAdapter;private List<String> listString = new ArrayList<String>();private PullRefresh pullRefresh;private LoadMore loadMore;@Overrideprotected void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initViews();// handler.sendEmptyMessage(0);pullRefresh = new PullRefresh();pullRefresh.execute("");}private void initViews(){dropRefreshListView = (DropRefreshListView) findViewById(R.id.dropRefreshListView);dropRefreshListView.setStateWithShow(DropRefreshListView.REFRESHING);for (int i = 0; i < 10; i++){listString.add("ABC");}textAdapter = new TestAdapter(this, dropRefreshListView, listString);dropRefreshListView.setAdapter(textAdapter);dropRefreshListView.setOnRefreshListener(new DropRefreshListView.OnRefreshListener(){@Overridepublic void onRefresh(){pullRefresh = new PullRefresh();pullRefresh.execute("");}@Overridepublic void onLoadMore(){loadMore = new LoadMore();loadMore.execute("");}});}private class PullRefresh extends AsyncTask<String, Integer, String>{@Overrideprotected void onPreExecute(){Log.i(TAG, "PullRefresh onPreExecute");}// doInBackground方法内部执行后台任务,不可在此方法内修改UI@Overrideprotected String doInBackground(String... params){Log.i(TAG, "PullRefresh doInBackground(Params... params) called");for (int i = 0; i < 10; i--){//                if (DropRefreshListView.isPullRefresh)//                {//                    try//                    {////                        Thread.sleep(300);Log.v("tag", Thread.currentThread().getId() + "");//                    }//                    catch (InterruptedException e)//                    {////                        e.printStackTrace();//                    }//                }//                else//                {//                    break;//                }}return null;}@Overrideprotected void onProgressUpdate(Integer... progresses){}// onPostExecute方法用于在执行完后台任务后更新UI,显示结果@Overrideprotected void onPostExecute(String result){Log.i(TAG, "PullRefresh onPostExecute(Result result) called");// textView.setText(result);//// execute.setEnabled(true);// cancel.setEnabled(false);dropRefreshListView.onRefreshComplete();textAdapter.notifyDataSetChanged();}// onCancelled方法用于在取消执行中的任务时更改UI@Overrideprotected void onCancelled(){Log.i(TAG, "PullRefresh onCancelled() called");// textView.setText("cancelled");// progressBar.setProgress(0);//// execute.setEnabled(true);// cancel.setEnabled(false);}}private class LoadMore extends AsyncTask<String, Integer, String>{@Overrideprotected String doInBackground(String... params){for (int i = 0; i < 10; i++){if (!DropRefreshListView.isPullRefresh){try{Thread.sleep(300);Log.v("tag", Thread.currentThread().getId() + "");}catch (InterruptedException e){e.printStackTrace();}}else{break;}}return null;}@Overrideprotected void onPostExecute(String result){Log.i(TAG, "LoadMore onPostExecute(Result result) called");dropRefreshListView.onLoadMoreComplete();textAdapter.notifyDataSetChanged();}}@Overrideprotected void onDestroy(){if(pullRefresh != null && pullRefresh.getStatus() != AsyncTask.Status.FINISHED)pullRefresh.cancel(true);super.onDestroy();//        loadMore.cancel(true);}}

package com.example.testrefreshlistview;import java.util.List;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.ListView;import android.widget.TextView;public class TestAdapter extends BaseAdapter{private Context context;private DropRefreshListView dropRefreshListView;private List<String> listString;public TestAdapter(Context context,DropRefreshListView dropRefreshListView,List<String> listString){this.context = context;this.dropRefreshListView = dropRefreshListView;this.listString = listString;}@Overridepublic int getCount(){return listString.size();}@Overridepublic Object getItem(int position){return position;}@Overridepublic long getItemId(int position){return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent){ViewHolder viewHolder = new ViewHolder();if(convertView == null){convertView = LayoutInflater.from(context).inflate(R.layout.item, null);viewHolder.iv_photo = (ImageView)convertView.findViewById(R.id.iv_photo);viewHolder.tv_content = (TextView)convertView.findViewById(R.id.tv_content);convertView.setTag(viewHolder);}else{viewHolder = (ViewHolder)convertView.getTag();}viewHolder.tv_content.setText(listString.get(position));return convertView;}static class ViewHolder{ImageView iv_photo;TextView tv_content;}}//activity_main

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"><com.example.testrefreshlistview.DropRefreshListViewandroid:id="@+id/dropRefreshListView"android:layout_width="match_parent"android:layout_height="match_parent"></com.example.testrefreshlistview.DropRefreshListView></RelativeLayout>

footer.xml<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/load_more_view"android:layout_width="match_parent"android:layout_height="match_parent"android:minHeight="40dp"><TextViewandroid:id="@+id/load_more_tv"android:layout_width="match_parent"android:layout_height="wrap_content"android:gravity="center"android:text="查看更多"android:textSize="20sp"android:layout_centerVertical="true"/><LinearLayoutandroid:id="@+id/loading_layout"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_centerVertical="true"android:orientation="horizontal"android:visibility="gone"android:gravity="center"><ProgressBarstyle="?android:attr/progressBarStyleSmall"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginRight="10dp"/><TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:gravity="center"android:text="加载中..."android:textSize="20sp"/></LinearLayout></RelativeLayout>//list_header

<?xml version="1.0" encoding="utf-8"?><!-- ListView的头部 --><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="wrap_content"><!-- 内容 --><RelativeLayoutandroid:id="@+id/head_contentLayout"android:layout_width="fill_parent"android:layout_height="wrap_content"android:paddingLeft="30dp" ><!-- 箭头图像、进度条 --><FrameLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentLeft="true"android:layout_centerVertical="true" ><!-- 箭头 --><ImageViewandroid:id="@+id/head_arrowImageView"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center"android:contentDescription="@string/app_name"android:src="@drawable/arrow" /><!-- 进度条 --><ProgressBarandroid:id="@+id/head_progressBar"style="@android:style/Widget.ProgressBar.Small"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center" /></FrameLayout><!-- 提示、最近更新 --><LinearLayoutandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_centerHorizontal="true"android:gravity="center_horizontal"android:orientation="vertical" ><!-- 提示 --><TextViewandroid:id="@+id/head_tipsTextView"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/dropdown_refresh"android:textSize="20sp" /><!-- 最近更新 --><TextViewandroid:id="@+id/head_lastUpdatedTextView"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/last_update"android:textSize="12sp" /></LinearLayout></RelativeLayout></LinearLayout>

item.xml

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical" ><ImageViewandroid:id="@+id/iv_photo"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_margin="10dp"/><TextViewandroid:id="@+id/tv_content"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_toRightOf="@+id/iv_photo"/></RelativeLayout>