大家好，又见面了，我是你们的朋友全栈君。
SwipeRefreshLayout大家都用过，google推出的，亲生儿子，兼容性自然最好！可是SwipeRefreshLayout只支持下拉刷新，没有上拉加载更多，这样是没办法满足我们的需要的，所以本文就对它进行一下定制，加上下拉刷新。
首先贴用法：
xml:
代码语言：javascript复制<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffccee"
android:orientation="vertical" >
<com.utilslibrary.widget.SuperSwipeLayout
android:id="@ id/swipeRefreshLayout"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="@ id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>
</com.utilslibrary.widget.SuperSwipeLayout>
</LinearLayout>Activity 里面只需要这样设置即可：
代码语言：javascript复制import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.widget.SwipeRefreshLayout;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.utilslibrary.widget.SuperSwipeLayout;
import java.util.ArrayList;public class SwipeRefreshLayoutActivity extends Activity {
private SuperSwipeLayout swipeRefreshLayout;
private ArrayList<String> data = new ArrayList<String>();
private ArrayAdapter<String> adapter;
int loadNum;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_swipe_refresh_layout);
adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, data);
swipeRefreshLayout = (SuperSwipeLayout) findViewById(R.id.swipeRefreshLayout);
ListView listView = (ListView) findViewById(R.id.listView);
//下拉刷新监听
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
// SwipeRefreshLayout接管其包裹的ListView下拉事件。
// 每一次对ListView的下拉动作，将触发SwipeRefreshLayout的onRefresh()。
@Override
public void onRefresh() {
System.out.println("======fresh...");
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
adapter.clear();
for(int i = 0; i < 20; i ){
adapter.add(i "");
}
swipeRefreshLayout.stopFreshing(false);
loadNum = 0;
}
}, 3500);
}
});
//加载更多的监听
swipeRefreshLayout.setOnReLoadListener(new SuperSwipeLayout.OnReLoadListener() {
@Override
public void onLoad() {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
for(int i = 0; i < 10; i ){
data.add("loadMore: " loadNum " - " i);
}
//一页的更多加载完了
swipeRefreshLayout.stopReLoad();
adapter.notifyDataSetChanged();
loadNum ;
if(loadNum >= 3){
//没有更多了
swipeRefreshLayout.ReLoadComplete();
}
}
}, 1500);
}
});
listView.setAdapter(adapter);
swipeRefreshLayout.startRefresh();
}
}
//看到没？用法是不是超简单？哈哈～下面看实现：
import android.content.Context;
import android.database.DataSetObserver;
import android.graphics.drawable.AnimationDrawable;
import android.support.v4.widget.SwipeRefreshLayout;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.AbsListView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import com.utilslibrary.R;
/**
* 定制SwipeRefreshLayout实现自动刷新，加载更多
* Created by sam on 17/2/22.
*/
public class SuperSwipeLayout extends SwipeRefreshLayout {
public static final int PULL_STATUS_NOMAL = 0;//正常狀態
public static final int PULL_STATUS_REFRESHING = 1;//正在刷新
public static final int PULL_STATUS_LOADMORE = 2;//正在加载更多
public static final int PULL_STATUS_LOADMORE_STOP = 3;//已经加载完更多
Context mContext;
ListView mListView;
OnReLoadListener mOnReLoadListener;
View mFooterView;
View mLoreMoreView;//加载更多的view
LinearLayout mFooterLayout;//整个footer的布局
LinearLayout mFooterLayoutGroup;//自定义footerView的父布局
SwipeRefreshLayout.OnRefreshListener mOnRefreshListener;
TextView mLoadMoreTextView;
ImageView mLoadMoreImage;
private int mStatus;
String mReLoadingText, mNoMoreText;
public SuperSwipeLayout(Context context) {
super(context);
init(context);
}
public SuperSwipeLayout(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
/**
* 初始化样式
*/
private void initRefreshStyle(){
//加载颜色是循环播放的，只要没有完成刷新就会一直循环
setColorSchemeResources(
android.R.color.holo_blue_bright,
android.R.color.holo_orange_light,
android.R.color.holo_green_light,
android.R.color.holo_red_light,
android.R.color.holo_purple
);
}
private void initLoadTextRes(){
mReLoadingText = "正在加载更多...";
mNoMoreText = "没有更多了～";
}
public ListView getListView(){
return mListView;
}
private void init(Context context) {
this.mContext = context;
initRefreshStyle();
initLoadTextRes();
mLoreMoreView = createLoadView(context);
mLoadMoreTextView = (TextView) mLoreMoreView.findViewWithTag("tv_loadmoer");
mLoadMoreImage = (ImageView) mLoreMoreView.findViewWithTag("image_loading");
mLoreMoreView.setVisibility(View.GONE);
AnimationDrawable anim = (AnimationDrawable) mLoadMoreImage.getBackground();
anim.start();
mFooterLayoutGroup = new LinearLayout(mContext);
mFooterLayoutGroup.setOrientation(LinearLayout.VERTICAL);
mFooterLayout = new LinearLayout(mContext);
mFooterLayout.setOrientation(LinearLayout.VERTICAL);
LinearLayout.LayoutParams footerParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
dipToPixels(context, 45));
footerParams.gravity = Gravity.CENTER;
mFooterLayout.addView(mFooterLayoutGroup);//外部添加的footerView
mFooterLayout.addView(mLoreMoreView, footerParams);//加载更多view
mListView = new ListView(context);
mListView.addFooterView(mFooterLayout);
addView(mListView, new ViewGroup.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
mListView.setOnScrollListener(new AbsListView.OnScrollListener() {
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
if (mStatus == PULL_STATUS_LOADMORE_STOP) {
return;
}
// 当不滚动时
if (mStatus != PULL_STATUS_LOADMORE
&& scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE) {
// 判断是否滚动到底部
if (view.getLastVisiblePosition() == view.getCount() - 1) {
if (null != mListView && mListView.getFooterViewsCount() == 0) {
mLoreMoreView.setVisibility(View.INVISIBLE);
return;
}
//加载更多佈局的代码
mOnReLoadListener.onLoad();
setStatus(PULL_STATUS_LOADMORE);
}
}
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
}
});
getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
//这里要减去footerview
//
int defaultViewCount = mListView.getHeaderViewsCount() mListView.getFooterViewsCount();
if (null != mOnReLoadListener && mListView.getCount() > defaultViewCount) {
mLoreMoreView.setVisibility(View.VISIBLE);
System.out.println("===onGlobalLayout " mListView.getCount());
return;
}
}
});
}
private View createLoadView(Context context){
LinearLayout layout = new LinearLayout(context);
layout.setOrientation(LinearLayout.HORIZONTAL);
ImageView imageView = new ImageView(context);
imageView.setTag("image_loading");
TextView textView = new TextView(context);
textView.setTag("tv_loadmoer");
LinearLayout.LayoutParams imageParams = new LinearLayout.LayoutParams(dipToPixels(context, 40),
dipToPixels(context, 40));
imageParams.gravity = Gravity.CENTER;
imageView.setBackgroundResource(R.drawable.progressbar);
layout.addView(imageView, imageParams);
LinearLayout.LayoutParams textParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
textParams.gravity = Gravity.CENTER;
layout.addView(textView, textParams);
return layout;
}
private int dipToPixels(Context context, float dip){
return (int)(context.getResources().getDisplayMetrics().density * dip);
}
private void setStatus(int status){
mStatus = status;
switch (status){
case PULL_STATUS_NOMAL:
mLoadMoreTextView.setText(mReLoadingText);
break;
case PULL_STATUS_LOADMORE:
mLoreMoreView.setVisibility(View.VISIBLE);
mLoadMoreImage.setVisibility(View.VISIBLE);
mLoadMoreTextView.setText(mReLoadingText);
break;
case PULL_STATUS_LOADMORE_STOP:
mLoadMoreTextView.setText(mNoMoreText);
mLoadMoreImage.setVisibility(View.GONE);
break;
case PULL_STATUS_REFRESHING:
break;
}
}
/**
* 更多加载完成
*/
public void stopReLoad(){
setStatus(PULL_STATUS_NOMAL);
}
/**
* 没有更多了～
*/
public void ReLoadComplete(){
setStatus(PULL_STATUS_LOADMORE_STOP);
}
/**
* 这里说一下，一般listview加载更多是没有footerview的，
* 但我这样把它加进去了，mFooterLayout是整个footerview的容器，是线性布局的，当然你也可以改
* 加载更多的view会拼在addFooterView这个传进来的view下面
* @param footerView
*/
public void addFooterView(View footerView){
if(null == mFooterLayoutGroup || mFooterLayoutGroup.getChildCount() > 0){
return;
}
mFooterLayoutGroup.addView(footerView,
new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
}
public void removeFooterView(){
if(null != mFooterLayoutGroup && mFooterLayoutGroup.getChildCount() > 0){
mFooterLayoutGroup.removeAllViews();
}
}
/**
* 自动刷新
*/
public void startRefresh(){
this.post(new Runnable() {
@Override
public void run() {
setStatus(PULL_STATUS_REFRESHING);
setRefreshing(true);
mOnRefreshListener.onRefresh();
}
});
}
public void stopFreshing(boolean fresh){
if(fresh){
setStatus(PULL_STATUS_REFRESHING);
}else{
setStatus(PULL_STATUS_NOMAL);
}
super.setRefreshing(fresh);
}
public void setOnRefreshListener(SwipeRefreshLayout.OnRefreshListener listener){
mOnRefreshListener = listener;
super.setOnRefreshListener(mOnRefreshListener);
}
public void setOnReLoadListener(OnReLoadListener listener){
this.mOnReLoadListener = listener;
}
public interface OnReLoadListener{
public void onLoad();
}
}
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