import java.util.ArrayList;
import java.util.List; import com.heima.googleplay.holder.BaseHolder;
import com.heima.googleplay.holder.MoreHolder;
import com.heima.googleplay.manager.ThreadManager;
import com.heima.googleplay.utils.UIUtils; import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView.RecyclerListener;
import android.widget.BaseAdapter;
import android.widget.ListView; public abstract class MyBaseAdapter<T> extends BaseAdapter implements
RecyclerListener { public ListView mListView; public MyBaseAdapter(ListView mListView, List<T> mDatas) {
this.mListView = mListView;
// 初始化一个界面可见的holder
mDisplayHolderLists = new ArrayList<BaseHolder>(); if (null != mListView) {
// 设置listview的回收监听
mListView.setRecyclerListener(this);
}
setData(mDatas);
} public List<T> mDatas;
private BaseHolder holder;
private List<BaseHolder> mDisplayHolderLists; public void setData(List<T> mDatas) {
this.mDatas = mDatas; } public List<T> getData() {
return mDatas;
} @Override
public int getCount() {
// +1 表示添加一个特殊的条目
return mDatas.size() + 1;
} @Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return mDatas.get(position);
} @Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
} // 表示加载更多
private final int MORE_ITEM_TYPE = 0;
// 表示普通的数据类型
private final int ITEM_VIEW_TYPE = 1;
private MoreHolder moreHolder; /**
* 获取到item的类型
*
* @param position
* @return
*/
@Override
public int getItemViewType(int position) {
// 判断当前是否是最后一个条目
if (position == getCount() - 1) {
return MORE_ITEM_TYPE;
} else {
return getInnerItemViewType(position);
}
} public int getInnerItemViewType(int position) {
// TODO Auto-generated method stub
return ITEM_VIEW_TYPE;
} /**
* 获取到一共有多少中数据类型
*
* @return
*/
@Override
public int getViewTypeCount() {
return super.getViewTypeCount() + 1;
} @Override
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView != null) {
holder = (BaseHolder) convertView.getTag();
} else {
if (getItemViewType(position) == MORE_ITEM_TYPE) {
holder = getMoreHolder();
} else {
holder = getHolder();
} }
if (getItemViewType(position) == ITEM_VIEW_TYPE) {
holder.setData(mDatas.get(position));
} // 把所有的holder全部丢入mDisplayHolderLists
mDisplayHolderLists.add(holder);
return holder.getRootView();
}
/**
* 获取更多的holder
* @return
*/
private BaseHolder getMoreHolder() {
if(moreHolder == null){
moreHolder = new MoreHolder(hasMore(),this);
} return moreHolder;
}
/**
* 表示有更多的数据
* @return
*/
public boolean hasMore() {
// TODO Auto-generated method stub
return true;
} public abstract BaseHolder getHolder(); /**
* 当listview回收的时候调用当前的方法
*/
@Override
public void onMovedToScrapHeap(View view) {
System.out.println("我被回收了.....");
if (null != view) {
BaseHolder holder = (BaseHolder) view.getTag();
if (null != holder) {
synchronized (mDisplayHolderLists) {
mDisplayHolderLists.remove(holder);
} }
} }
private boolean isLoading = false;
/**
* 加载更多
*/
public void loadMore() {
if(!isLoading){
isLoading = true;
ThreadManager.getLongPool().execute(new Runnable() { @Override
public void run() {
final List list = onLoadMore();
UIUtils.runInMainThread(new Runnable() { @Override
public void run() {
if(null == list){
//如果服务器返回的数据等于null。那么设置一个错误状态
getMoreHolder().setData(MoreHolder.ERROR);
}else if(list.size() < 20){
//如果服务器返回的数据小于20条。那么设置没有更多数据的状态
getMoreHolder().setData(MoreHolder.NO_MORE);
}else{
getMoreHolder().setData(MoreHolder.HAS_MORE);
} if(null != list){
if(null !=mDatas){
mDatas.addAll(list);
}else{
setData(list);
}
}
//刷新界面
notifyDataSetChanged();
isLoading = false;
}
}); }
});
} } protected abstract List onLoadMore(); }
MyBaseAdapter
package com.heima.googleplay.widget; import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors; import com.heima.googleplay.R;
import com.heima.googleplay.manager.ThreadManager;
import com.heima.googleplay.utils.UIUtils; import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.FrameLayout;
/**
*
*
* ============================================================
**/
public abstract class LoadingPage extends FrameLayout {
//默认状态
private final int UN_LOADING = 1;
//加载状态
private final int LOADING = 2;
//加载失败状态
private final int ERROR = 3;
//加载成功。然后服务器没有返回数据
private final int EMPTY = 4;
//加载成功的状态
private final int SUCCESS = 5;
//用来记录某种状态
private int mState;
private View mLoadingView;
private View mErrorView;
private View mEmptyView; private View mSuccessView;
public LoadingPage(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
} private void init() {
//首先赋值
mState = UN_LOADING; mLoadingView = createLoadingView(); if(null != mLoadingView){
addView(mLoadingView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
} mErrorView = createErrorView(); if(null != mErrorView){
addView(mErrorView,new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
} mEmptyView = createEmptyView(); if(null != mEmptyView ){
addView(mEmptyView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
} showSafePage(); } private void showSafePage() {
UIUtils.runInMainThread(new Runnable() { @Override
public void run() {
showPage(); }
}); } protected void showPage() {
if(null != mLoadingView){
mLoadingView.setVisibility(mState == UN_LOADING || mState == LOADING ? View.VISIBLE : View.INVISIBLE);
} if(null != mErrorView){
mErrorView.setVisibility(mState == ERROR ? View.VISIBLE : View.INVISIBLE);
} if(null != mEmptyView){
mEmptyView.setVisibility(mState == EMPTY ? View.VISIBLE : View.INVISIBLE);
} if(null == mSuccessView && mState == SUCCESS ){
mSuccessView = createSuccessView();
addView(mSuccessView, new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
}
if(null != mSuccessView){
mSuccessView.setVisibility(mState == SUCCESS ? View.VISIBLE : View.INVISIBLE);
}
} public abstract View createSuccessView(); private View createEmptyView() {
// TODO Auto-generated method stub
return UIUtils.inflate(R.layout.loading_page_empty);
} private View createErrorView() {
// TODO Auto-generated method stub
return UIUtils.inflate(R.layout.loading_page_error);
} private View createLoadingView() {
// TODO Auto-generated method stub
return UIUtils.inflate(R.layout.loading_page_loading);
} public LoadingPage(Context context, AttributeSet attrs) {
super(context, attrs);
init();
} public LoadingPage(Context context) {
super(context);
init();
}
// //加载失败状态
// private final int ERROR = 3;
// //加载成功。然后服务器没有返回数据
// private final int EMPTY = 4;
// //加载成功的状态
// private final int SUCCESS = 5;
public enum LoadResult{
ERROR(3),EMPTY(4),SUCCESS(5);
int value ;
LoadResult(int value){
this.value = value;
}
public int getValue() {
return value;
}
} private class LoadTask implements Runnable{ @Override
public void run() {
final LoadResult result = Load();
UIUtils.runInMainThread(new Runnable() { @Override
public void run() { mState = result.getValue(); showPage();
}
}); } } public void show() {
if(mState == ERROR || mState == EMPTY){
mState = UN_LOADING;
} if(mState == UN_LOADING){
mState = LOADING; LoadTask task = new LoadTask();
ThreadManager.getLongPool().execute(task);
// ExecutorService service = Executors.newFixedThreadPool(3);
// LoadTask task = new LoadTask();
// service.execute(task);
}
showSafePage();
} public abstract LoadResult Load() ; }
LoadingPage