listview 最简单也最困难2

package com.weidingqiang.customlistview;

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

import android.content.Context;
import android.os.Handler;
import android.os.Message;
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.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;

/**
* 下拉刷新，底部更多
*
*/
public class RefreshListView extends ListView implements OnScrollListener{

private static final String TAG = RefreshListView.class.getSimpleName();

private float mDownY;
private float mMoveY;

private int mHeaderHeight;

private int mCurrentScrollState;

private final static int NONE_PULL_REFRESH = 0;    //正常状态
private final static int ENTER_PULL_REFRESH = 1;   //进入下拉刷新状态
private final static int OVER_PULL_REFRESH = 2;    //进入松手刷新状态
private final static int EXIT_PULL_REFRESH = 3;    //松手后反弹和加载状态
private int mPullRefreshState = 0;                 //记录刷新状态

private final static int REFRESH_BACKING = 0;      //反弹中
private final static int REFRESH_BACED = 1;        //达到刷新界限，反弹结束后
private final static int REFRESH_RETURN = 2;       //没有达到刷新界限，返回
private final static int REFRESH_DONE = 3;         //加载数据结束

private LinearLayout mHeaderLinearLayout = null;
private LinearLayout mFooterLinearLayout = null;
private TextView mHeaderTextView = null;
private TextView mHeaderUpdateText = null;
private ImageView mHeaderPullDownImageView = null;
private ImageView mHeaderReleaseDownImageView = null;
private ProgressBar mHeaderProgressBar = null;
private TextView mFooterTextView = null;
private ProgressBar mFooterProgressBar = null;

private SimpleDateFormat mSimpleDateFormat;

private Object mRefreshObject = null;
private RefreshListener mRefreshListener = null;
public void setOnRefreshListener(RefreshListener refreshListener) {
this.mRefreshListener = refreshListener;
}

public RefreshListView(Context context) {
this(context, null);
}

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

void init(final Context context) {
mHeaderLinearLayout = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.refresh_list_header, null);
addHeaderView(mHeaderLinearLayout);
mHeaderTextView = (TextView) findViewById(R.id.refresh_list_header_text);
mHeaderUpdateText = (TextView) findViewById(R.id.refresh_list_header_last_update);
mHeaderPullDownImageView = (ImageView) findViewById(R.id.refresh_list_header_pull_down);
mHeaderReleaseDownImageView = (ImageView) findViewById(R.id.refresh_list_header_release_up);
mHeaderProgressBar = (ProgressBar) findViewById(R.id.refresh_list_header_progressbar);

mFooterLinearLayout = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.refresh_list_footer, null);
addFooterView(mFooterLinearLayout);
mFooterProgressBar = (ProgressBar) findViewById(R.id.refresh_list_footer_progressbar);
mFooterTextView = (TextView) mFooterLinearLayout.findViewById(R.id.refresh_list_footer_text);
mFooterLinearLayout.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if (context.getString(R.string.app_list_footer_more).equals(mFooterTextView.getText())) {
mFooterTextView.setText(R.string.app_list_footer_loading);
mFooterProgressBar.setVisibility(View.VISIBLE);
if (mRefreshListener != null) {
//mRefreshListener.more();
}
}
}
});

setSelection(1);
setOnScrollListener(this);
measureView(mHeaderLinearLayout);
mHeaderHeight = mHeaderLinearLayout.getMeasuredHeight();

mSimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm");
mHeaderUpdateText.setText(context.getString(R.string.app_list_header_refresh_last_update, mSimpleDateFormat.format(new Date())));
}

@Override
public boolean onTouchEvent(MotionEvent ev) {

Log.d(TAG, ">>>>>>>onTouchEvent>>>>>");

switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mDownY = ev.getY();
break;
case MotionEvent.ACTION_MOVE:
mMoveY = ev.getY();
if (mPullRefreshState == OVER_PULL_REFRESH) {
mHeaderLinearLayout.setPadding(mHeaderLinearLayout.getPaddingLeft(),
(int)((mMoveY - mDownY)/3),
mHeaderLinearLayout.getPaddingRight(),
mHeaderLinearLayout.getPaddingBottom());
}
break;
case MotionEvent.ACTION_UP:
//when you action up, it will do these:
//1. roll back util header topPadding is 0
//2. hide the header by setSelection(1)
if (mPullRefreshState == OVER_PULL_REFRESH || mPullRefreshState == ENTER_PULL_REFRESH) {
new Thread() {
public void run() {
Message msg;
while(mHeaderLinearLayout.getPaddingTop() > 1) {
msg = mHandler.obtainMessage();
msg.what = REFRESH_BACKING;
mHandler.sendMessage(msg);
try {
sleep(5);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
msg = mHandler.obtainMessage();
if (mPullRefreshState == OVER_PULL_REFRESH) {
msg.what = REFRESH_BACED;
} else {
msg.what = REFRESH_RETURN;
}
mHandler.sendMessage(msg);
};
}.start();
}
break;
}
return super.onTouchEvent(ev);
}

@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {

Log.d(TAG,">>>>>>>firstVisibleItem     "+firstVisibleItem +"  visibleItemCount    "+visibleItemCount +
"  totalItemCount   "+totalItemCount);

if (mCurrentScrollState == SCROLL_STATE_TOUCH_SCROLL
&& firstVisibleItem == 0
&& (mHeaderLinearLayout.getBottom() >= 0 && mHeaderLinearLayout.getBottom() < mHeaderHeight)) {
//进入且仅进入下拉刷新状态
if (mPullRefreshState == NONE_PULL_REFRESH) {
mPullRefreshState = ENTER_PULL_REFRESH;
}
} else if (mCurrentScrollState == SCROLL_STATE_TOUCH_SCROLL
&& firstVisibleItem == 0
&& (mHeaderLinearLayout.getBottom() >= mHeaderHeight)) {
//下拉达到界限，进入松手刷新状态
if (mPullRefreshState == ENTER_PULL_REFRESH || mPullRefreshState == NONE_PULL_REFRESH) {
mPullRefreshState = OVER_PULL_REFRESH;
mDownY = mMoveY; //为下拉1/3折扣效果记录开始位置
mHeaderTextView.setText("松手刷新");//显示松手刷新
mHeaderPullDownImageView.setVisibility(View.GONE);//隐藏"下拉刷新"
mHeaderReleaseDownImageView.setVisibility(View.VISIBLE);//显示向上的箭头
}
} else if (mCurrentScrollState == SCROLL_STATE_TOUCH_SCROLL && firstVisibleItem != 0) {
//不刷新了
if (mPullRefreshState == ENTER_PULL_REFRESH) {
mPullRefreshState = NONE_PULL_REFRESH;
}
} else if (mCurrentScrollState == SCROLL_STATE_FLING && firstVisibleItem == 0) {
//飞滑状态，不能显示出header，也不能影响正常的飞滑
//只在正常情况下才纠正位置
if (mPullRefreshState == NONE_PULL_REFRESH) {
setSelection(1);
}
}

//判断是否滚到最后一行
if (firstVisibleItem + visibleItemCount == totalItemCount && totalItemCount > 0) {
isLastRow = true;
}

//当数据少的时候 隐藏header 和 footer
if(totalItemCount!=0 && visibleItemCount == totalItemCount)
{
removeFootView();
removeHeaderView(mHeaderLinearLayout);
}
}

private boolean isLastRow =false;

//scrollState = SCROLL_STATE_TOUCH_SCROLL(1) 正在滚动
//scrollState = SCROLL_STATE_FLING(2) 手指做了抛的动作（手指离开屏幕前，用力滑了一下）
//scrollState = SCROLL_STATE_IDLE(0) 停止滚动
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
mCurrentScrollState = scrollState;

//当滚到最后一行且停止滚动时，执行加载
if (isLastRow && scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE) {
Log.d(TAG,"zuihoula");
if(mRefreshListener != null){
mRefreshListener.loadEnding();
}
isLastRow = false;
}
}

@Override
public void setAdapter(ListAdapter adapter) {
super.setAdapter(adapter);
setSelection(1);
}

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;
if (lpHeight > 0) {
childHeightSpec = MeasureSpec.makeMeasureSpec(lpHeight,
MeasureSpec.EXACTLY);
} else {
childHeightSpec = MeasureSpec.makeMeasureSpec(0,
MeasureSpec.UNSPECIFIED);
}
child.measure(childWidthSpec, childHeightSpec);
}

private Handler mHandler = new Handler(){
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case REFRESH_BACKING:
mHeaderLinearLayout.setPadding(mHeaderLinearLayout.getPaddingLeft(),
(int) (mHeaderLinearLayout.getPaddingTop()*0.75f),
mHeaderLinearLayout.getPaddingRight(),
mHeaderLinearLayout.getPaddingBottom());
break;
case REFRESH_BACED:
mHeaderTextView.setText("正在加载...");
mHeaderProgressBar.setVisibility(View.VISIBLE);
mHeaderPullDownImageView.setVisibility(View.GONE);
mHeaderReleaseDownImageView.setVisibility(View.GONE);
mPullRefreshState = EXIT_PULL_REFRESH;
if(mRefreshListener != null){
mRefreshListener.loading();
}

//                    new Thread() {
//                        public void run() {
//                            if (mRefreshListener != null) {
//                                mRefreshObject = mRefreshListener.refreshing();
//                            }
//                            Message msg = mHandler.obtainMessage();
//                            msg.what = REFRESH_DONE;
//                            mHandler.sendMessage(msg);
//                        };
//                    }.start();
break;
case REFRESH_RETURN:
mHeaderTextView.setText("下拉刷新");
mHeaderProgressBar.setVisibility(View.INVISIBLE);
mHeaderPullDownImageView.setVisibility(View.VISIBLE);
mHeaderReleaseDownImageView.setVisibility(View.GONE);
mHeaderLinearLayout.setPadding(mHeaderLinearLayout.getPaddingLeft(),
0,
mHeaderLinearLayout.getPaddingRight(),
mHeaderLinearLayout.getPaddingBottom());
mPullRefreshState = NONE_PULL_REFRESH;
setSelection(1);
break;
case REFRESH_DONE:
mHeaderTextView.setText("下拉刷新");
mHeaderProgressBar.setVisibility(View.INVISIBLE);
mHeaderPullDownImageView.setVisibility(View.VISIBLE);
mHeaderReleaseDownImageView.setVisibility(View.GONE);
mHeaderUpdateText.setText(getContext().getString(R.string.app_list_header_refresh_last_update,
mSimpleDateFormat.format(new Date())));
mHeaderLinearLayout.setPadding(mHeaderLinearLayout.getPaddingLeft(),
0,
mHeaderLinearLayout.getPaddingRight(),
mHeaderLinearLayout.getPaddingBottom());
mPullRefreshState = NONE_PULL_REFRESH;
setSelection(1);
if (mRefreshListener != null) {
mRefreshListener.refreshed(mRefreshObject);
}
break;
default:
break;
}
}
};
public interface RefreshListener {
void refreshed(Object obj);
void loadEnding();
void loading();
}

public void finishFootView() {
mFooterProgressBar.setVisibility(View.GONE);
mFooterTextView.setText(R.string.app_list_footer_more);
}

public void addFootView() {
if (getFooterViewsCount() == 0) {
addFooterView(mFooterLinearLayout);
}
}

public void removeFootView() {
removeFooterView(mFooterLinearLayout);
}

public void onLoadComplete(){
Message msg = mHandler.obtainMessage();
msg.what = REFRESH_DONE;
mHandler.sendMessage(msg);
}
}

package com.weidingqiang.customlistview;

import android.os.AsyncTask;
import android.os.Handler;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;

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

public class MainActivity extends AppCompatActivity implements RefreshListView.RefreshListener{

private RefreshListView listView;

List<String> data;

private ArrayAdapter arrayAdapter;

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

initViewUI();
initData();
initEvent();
}

private void initViewUI(){
listView = (RefreshListView) this.findViewById(R.id.listview);
}

private void initData(){
data = new ArrayList<String>();

data.add("测试数据1");
data.add("测试数据2");
data.add("测试数据3");
data.add("测试数据1");
data.add("测试数据2");
data.add("测试数据3");
data.add("测试数据1");
data.add("测试数据2");
data.add("测试数据3");
data.add("测试数据1");
data.add("测试数据2");
data.add("测试数据3");

arrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_expandable_list_item_1,data);

listView.setAdapter(arrayAdapter);
listView.setOnRefreshListener(this);
}

private void initEvent(){

}

@Override
public void refreshed(Object obj) {

}

@Override
public void loadEnding() {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
for (int i=0;i<10;i++)
{
data.add("end刷新后添加的内容"+i);
}
arrayAdapter.notifyDataSetChanged();
//listView.onLoadComplete();
}
},1000);
}

@Override
public void loading() {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {

data.add(0, "start刷新后添加的内容");
data.add(0, "start刷新后添加的内容");
arrayAdapter.notifyDataSetChanged();
listView.onLoadComplete();
}
},1000);
}
}

<?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"
>

<com.weidingqiang.customlistview.RefreshListView
android:id="@+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent"
>

</com.weidingqiang.customlistview.RefreshListView>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:gravity="center">
<TextView android:id="@+id/refresh_list_footer_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:textSize="20dip"
android:textColor="#192F06"
android:padding="12dip"
android:text="@string/app_list_footer_loading"/>
<ProgressBar android:id="@+id/refresh_list_footer_progressbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
style="?android:attr/progressBarStyleSmall"
android:visibility="gone">
</ProgressBar>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center">
<ProgressBar android:id="@+id/refresh_list_header_progressbar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
style="?android:attr/progressBarStyleSmall"
android:visibility="gone">
</ProgressBar>
<ImageView android:id="@+id/refresh_list_header_pull_down"
android:layout_width="9dip"
android:layout_height="25dip"
android:layout_gravity="center"
android:src="@mipmap/arrow_down" />
<ImageView android:id="@+id/refresh_list_header_release_up"
android:layout_width="9dip"
android:layout_height="25dip"
android:layout_gravity="center"
android:src="@mipmap/arrow_up"
android:visibility="gone" />
<RelativeLayout android:layout_width="180dip"
android:layout_height="wrap_content">
<TextView android:id="@+id/refresh_list_header_text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_alignParentTop="true"
android:textSize="12dip"
android:textColor="#192F06"
android:paddingTop="8dip"
android:text="@string/app_list_header_refresh_down"/>
<TextView android:id="@+id/refresh_list_header_last_update"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_below="@id/refresh_list_header_text"
android:textSize="12dip"
android:textColor="#192F06"
android:paddingBottom="8dip"
android:text="@string/app_list_header_refresh_last_update"/>
</RelativeLayout>
</LinearLayout>

<resources>
<string name="app_name">CustomListView</string>

<string name="app_list_header_refresh_down">下拉刷新</string>
<string name="app_list_header_refreshing">正在刷新</string>
<string name="app_list_header_refresh_up">松开刷新</string>
<string name="app_list_header_refresh_last_update">上次更新于:%s</string>
<string name="app_list_footer_more">更多</string>
<string name="app_list_footer_loading">正在加载</string>
</resources>