PullToRefreshListView實現多條目加載上拉刷新和下拉加載
更新時間:2019年01月28日 12:01:13 作者:dp666666
這篇文章主要為大家詳細介紹了PullToRefreshListView實現多條目加載上拉刷新和下拉加載,具有一定的參考價值,感興趣的小伙伴們可以參考一下
本文實例為大家分享了Android九宮格圖片展示的具體代碼,供大家參考,具體內容如下
XML布局
主頁面main布局
<com.handmark.pulltorefresh.library.PullToRefreshListView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/pull" > </com.handmark.pulltorefresh.library.PullToRefreshListView>
pulllist布局
<ImageView android:layout_width="120dp" android:layout_height="100dp" android:id="@+id/iv" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/tv" />
java代碼
App頁面
package com.example.duanpengpenglx20171108; import android.app.Application; import com.nostra13.universalimageloader.cache.memory.impl.UsingFreqLimitedMemoryCache; import com.nostra13.universalimageloader.core.DisplayImageOptions; import com.nostra13.universalimageloader.core.ImageLoader; import com.nostra13.universalimageloader.core.ImageLoaderConfiguration; import com.nostra13.universalimageloader.core.assist.QueueProcessingType; import com.nostra13.universalimageloader.core.download.BaseImageDownloader; /** * Created by 朋 on 2017/11/8. */ public class App extends Application { @Override public void onCreate() { super.onCreate(); ImageLoaderConfiguration config = new ImageLoaderConfiguration .Builder(this) .memoryCacheExtraOptions(480,800) .threadPoolSize(5) .threadPriority(Thread.NORM_PRIORITY - 2) .denyCacheImageMultipleSizesInMemory() .memoryCache(new UsingFreqLimitedMemoryCache(2 * 1024 * 1024)) // You can pass your own memory cache implementation/你可以通過自己的內存緩存實現 .memoryCacheSize(2 * 1024 * 1024) .tasksProcessingOrder(QueueProcessingType.LIFO) .defaultDisplayImageOptions(DisplayImageOptions.createSimple()) .imageDownloader(new BaseImageDownloader(this, 5 * 1000, 30 * 1000)) // connectTimeout (5 s), readTimeout (30 s)超時時間 .writeDebugLogs() // Remove for release app .build();//開始構建 //初始化imageloader; ImageLoader.getInstance().init(config); } }
MainActivity頁面
public class MainActivity extends AppCompatActivity { List<Jbean.DataBean> arr = new ArrayList(); private View view; private ListView lv; private Adapter adapter; int i = 0; private PullToRefreshListView pull; private Adapter adapter1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); pull = (PullToRefreshListView) findViewById(R.id.pull); pull.setMode(PullToRefreshBase.Mode.BOTH); ListView lv = pull.getRefreshableView(); adapter1 = new Adapter(); lv.setAdapter(adapter1); new MyAsyncTask().execute("http://www.93.gov.cn/93app/data.do?channelId=0&startNum=0"); pull.setOnRefreshListener(new PullToRefreshBase.OnRefreshListener2<ListView>() { @Override //上拉 public void onPullDownToRefresh(PullToRefreshBase<ListView> refreshView) { arr.clear(); i = 0; new MyAsyncTask().execute("http://www.93.gov.cn/93app/data.do?channelId=0&startNum=" + i); } @Override //下拉加載20條 public void onPullUpToRefresh(PullToRefreshBase<ListView> refreshView) { i = i + 20;new MyAsyncTask().execute("http://www.93.gov.cn/93app/data.do?channelId=0&startNum=" + i); } }); } class MyAsyncTask extends AsyncTask<String, Void, String> { @Override protected String doInBackground(String... params) { String string = ""; StringBuffer stringBuffer = new StringBuffer(); try { URL url = new URL(params[0]); URLConnection urlConnection = url.openConnection(); InputStream inputStream = urlConnection.getInputStream(); BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream)); while ((string = bufferedReader.readLine()) != null) { stringBuffer.append(string); } } catch (Exception e) { e.printStackTrace(); } return stringBuffer.toString(); } @Override protected void onPostExecute(String s) { super.onPostExecute(s); Jbean fragone_bean = new Gson().fromJson(s, Jbean.class); List<Jbean.DataBean> data = fragone_bean.getData(); arr.addAll(data); adapter1.notifyDataSetChanged(); pull.onRefreshComplete(); } } class Adapter extends BaseAdapter { @Override public int getCount() { return arr.size(); } @Override public Object getItem(int position) { return arr.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { Sj sj = new Sj(); Jbean.DataBean dataBean = arr.get(position); if (convertView==null){ convertView = View.inflate(MainActivity.this,R.layout.pulllist,null); sj.image=convertView.findViewById(R.id.iv); sj.tv=convertView.findViewById(R.id.tv); convertView.setTag(sj); }else { sj =(Sj) convertView.getTag(); } sj.tv.setText(dataBean.getSUBTITLE()); DisplayImageOptions options = new DisplayImageOptions.Builder() .cacheInMemory(true) .cacheOnDisk(true) .showImageOnLoading(R.drawable.zhengzaijiazai) .showImageForEmptyUri(R.drawable.zhengzaijiazai) .showImageOnFail(R.drawable.zhengzaijiazai) .bitmapConfig(Bitmap.Config.RGB_565) .build(); ImageLoader.getInstance().displayImage((String) dataBean.getIMAGEURL(),sj.image,options); return convertView; } } class Sj{ ImageView image; TextView tv; } }
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持腳本之家。
您可能感興趣的文章:
- android ListView結合xutils3仿微信實現下拉加載更多
- Android ListView實現下拉加載功能
- Android仿網易一元奪寶客戶端下拉加載動畫效果(一)
- Android實現仿慕課網下拉加載動畫
- Android中使用RecyclerView實現下拉刷新和上拉加載
- Android下拉刷新上拉加載控件(適用于所有View)
- Android RecyclerView實現下拉刷新和上拉加載
- android開發(fā)教程之實現listview下拉刷新和上拉刷新效果
- Android實現上拉加載更多以及下拉刷新功能(ListView)
- Android RecyclerView 上拉加載更多及下拉刷新功能的實現方法
相關文章
anroid開發(fā)教程之spinner下拉列表的使用示例
這篇文章主要介紹了anroid的spinner下拉列表的使用示例,需要的朋友可以參考下2014-04-04Android實現Banner界面廣告圖片循環(huán)輪播(包括實現手動滑動循環(huán))
這篇文章主要介紹了Android實現Banner界面廣告圖片循環(huán)輪播(包括實現手動滑動循環(huán))的相關資料,需要的朋友可以參考下2016-02-02