多條目+imageloader+xlistview+viewpager
阿新 • • 發佈:2018-12-20
主XML佈局:
<me.maxwin.view.XListView android:id="@+id/xlistview" android:layout_width="0dp" android:layout_height="0dp" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintTop_toTopOf="parent" ></me.maxwin.view.XListView>
第一個子佈局:
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="0dp"
android:layout_height="200dp"
app:layout_constraintLeft_toLeftOf="parent"
></android.support.v4.view.ViewPager>
第二個子佈局:
<TextView android:id="@+id/name" android:layout_width="0dp" android:layout_height="wrap_content" android:text="asfdbasf" android:layout_margin="5dp" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toLeftOf="@id/image" android:textSize="17sp" /> <TextView android:id="@+id/message" android:layout_width="0dp" android:layout_height="wrap_content" android:text="dfgdhfngmngf" app:layout_constraintTop_toBottomOf="@id/title" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toLeftOf="@id/image" android:maxLines="2" android:layout_margin="5dp" /> <ImageView android:id="@+id/image" android:layout_width="100dp" android:layout_height="100dp" app:layout_constraintRight_toRightOf="parent" />
工具類:
public interface CallBack<T>{ void getdata(T t); } //執行非同步任務 public static void yibu(String lujing, final Class clazz, final CallBack callBack){ new AsyncTask<String, Void, Object>() { @Override protected Object doInBackground(String... strings) { return NetUtil.jiexi(strings[0],clazz); } @Override protected void onPostExecute(Object o) { callBack.getdata(o); } }.execute(lujing); } //解析 public static <T> T jiexi(String lujing,Class clazz){ T t= (T) new Gson().fromJson(NetUtil.geturl(lujing),clazz); return t; } //網路請求 public static String geturl(String lujing){ String result=""; try { URL url=new URL(lujing); HttpURLConnection urlConnection= (HttpURLConnection) url.openConnection(); urlConnection.setRequestMethod("GET"); urlConnection.setReadTimeout(5000); urlConnection.setConnectTimeout(5000); if (urlConnection.getResponseCode()==200){ result=NetUtil.zifu(urlConnection.getInputStream()); } } catch (Exception e) { e.printStackTrace(); } return result; } private static String zifu(InputStream inputStream) throws IOException { InputStreamReader inputStreamReader=new InputStreamReader(inputStream); BufferedReader buff=new BufferedReader(inputStreamReader); StringBuilder builder=new StringBuilder(); for (String imp=buff.readLine();imp!=null;imp=buff.readLine()){ builder.append(imp); } return builder.toString(); }
Activity中的佈局:
private String bannerurl="http://www.zhaoapi.cn/quarter/getAd";
private String newsrul="http://172.17.8.100/movieApi/movie/v1/findHotMovieList?count=%d&page=%d";
private XListView xListView;
private int page;
private Mybase myabse;
private final int CCOUNT=10;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
page=1;
//獲取資源ID
xListView = findViewById(R.id.xlistview);
//支援重新整理
xListView.setPullRefreshEnable(true);
//支援載入
xListView.setPullLoadEnable(true);
myabse=new Mybase(this);
xListView.setAdapter(myabse);
xListView.setXListViewListener(new XListView.IXListViewListener() {
@Override
public void onRefresh() {//重新整理
page=1;
getdata();
}
@Override
public void onLoadMore() {//載入
page++;
getdata();
}
});
getdata();
}
public void getdata(){
if (page==1){
bannerdata();
newsdata();;
}else{
newsdata();
}
}
public void bannerdata(){
NetUtil.yibu(bannerurl, BannerBean.class, new NetUtil.CallBack<BannerBean>() {
@Override
public void getdata(BannerBean o) {
myabse.setBlist(o.getData());
}
});
}
public void newsdata(){
NetUtil.yibu(String.format(newsrul, CCOUNT,page), NewsBean.class, new NetUtil.CallBack<NewsBean>() {
@Override
public void getdata(NewsBean o) {
if (page==1){
myabse.setMlist(o.getResult());
}else{
myabse.addMlist(o.getResult());
}
//停止重新整理
xListView.stopRefresh();
//停止載入
xListView.stopLoadMore();
if (o.getResult().size()<CCOUNT){
xListView.setPullLoadEnable(false);
}
}
});
}
Base介面卡:
private List<BannerBean.Data> blist;
private List<NewsBean.Result> nlist;
private Context context;
private final int ITEM_COUNT=2;
private final int ITEM_BANNER=0;
private final int ITEM_NEWS=1;
public Mybase(Context context) {
this.context = context;
blist=new ArrayList<>();
nlist=new ArrayList<>();
}
//更新banner資料
public void setBlist(List<BannerBean.Data> list) {
if (list!=null){
blist.addAll(list);
}
notifyDataSetChanged();
}
//更新news資料
public void setMlist(List<NewsBean.Result> list) {
nlist.clear();
if (list!=null){
nlist.addAll(list);
}
notifyDataSetChanged();
}
//載入news的資料
public void addMlist(List<NewsBean.Result> list) {
if (list!=null){
nlist.addAll(list);
}
notifyDataSetChanged();
}
@Override
public int getCount() {
return hasbanner()?nlist.size()+1:nlist.size();
}
public Boolean hasbanner(){
return blist.size()>0;
}
@Override
public NewsBean.Result getItem(int position) {
//return hasbanner()?nlist.get(position-1):nlist.get(position);
return nlist.get(hasbanner()?position-1:position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public int getViewTypeCount() {
return ITEM_COUNT;
}
@Override
public int getItemViewType(int position) {
return hasbanner()&&position==0?ITEM_BANNER:ITEM_NEWS;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (getItemViewType(position)==ITEM_BANNER){
BannerViewHolder holder;
if (convertView==null){
convertView=LayoutInflater.from(context).inflate(R.layout.item_banner,parent,false);
holder=new BannerViewHolder(convertView);
}else{
holder= (BannerViewHolder) convertView.getTag();
}
holder.getdata(context,blist);
}else{
NewsViewHolder holder;
if (convertView==null){
convertView=LayoutInflater.from(context).inflate(R.layout.item_news,parent,false);
holder=new NewsViewHolder(convertView);
}else{
holder= (NewsViewHolder) convertView.getTag();
}
holder.getdata(getItem(position));
}
return convertView;
}
class BannerViewHolder{
private ViewPager viewPager;
@SuppressLint("HandlerLeak")
private android.os.Handler handler=new Handler(){
@Override
public void handleMessage(Message msg) {
handler.removeCallbacksAndMessages(null);
viewPager.setCurrentItem(viewPager.getCurrentItem()+1);
sendEmptyMessageDelayed(0,2000);
}
};
public BannerViewHolder(View convertView) {
viewPager=convertView.findViewById(R.id.viewpager);
convertView.setTag(this);
}
public void getdata(Context context, List<BannerBean.Data> blist) {
viewPager.setAdapter(new Mypage(blist,context));
//預設位置
viewPager.setCurrentItem(blist.size()/2);
handler.sendEmptyMessageDelayed(0,2000);
}
}
class NewsViewHolder{
private TextView name;
private TextView message;
private ImageView image;
public NewsViewHolder(View convertView) {
name=convertView.findViewById(R.id.name);
message=convertView.findViewById(R.id.message);
image=convertView.findViewById(R.id.image);
convertView.setTag(this);
}
public void getdata(NewsBean.Result item) {
name.setText(item.getName());
message.setText(item.getSummary());
ImageLoader.getInstance().displayImage(item.getImageUrl(),image);
}
}
Pager介面卡:
private List<BannerBean.Data> list;
private Context context;
public Mypage(List<BannerBean.Data> list, Context context) {
this.list = list;
this.context = context;
}
@Override
public int getCount() {
return 5000;
}
@Override
public boolean isViewFromObject(@NonNull View view, @NonNull Object o) {
return view==o;
}
@NonNull
@Override
public Object instantiateItem(@NonNull ViewGroup container, int position) {
ImageView imageView=new ImageView(context);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
container.addView(imageView);
ImageLoader.getInstance()
.displayImage(list.get(position%list.size()).getnotIcon(),imageView);
return imageView;
}
@Override
public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
container.removeView((View)object);
}