安卓中PullToRefreshListview新增頭部的方法
阿新 • • 發佈：2019-01-24
PullToRefreshListView第三方的自定義listview用起來很方便，但是有時候我們需要為這個listview新增頭，由於PullToRefreshListView沒有.addHeaderView方法
這時候新增頭，就有點犯難了。其實加頭只需要一句簡單的程式碼就行
我們為第三方的PullToRefresh新增頭部的方法
由於PullToRefreshListView沒有直接新增頭佈局的方法，所以我們需要用refreshListView.getRefreshableView()把refreshListView轉化成正常的listview，轉化後的listview才可以新增頭佈局。
private PullToRefreshListView refreshListView;
private ListView listView;
listView = refreshListView.getRefreshableView();
listView .addHeaderView(headerView);
下面兩個例子分別為activity和fragment中的PullToRefresh新增頭
一：在activity中為PullToRefresh新增頭
package com.huxiu.yd; import android.os.Bundle; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.FrameLayout; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import com.android.volley.Request; import com.android.volley.Response; import com.android.volley.VolleyError; import com.handmark.pulltorefresh.library.PullToRefreshBase; import com.handmark.pulltorefresh.library.PullToRefreshListView; import com.huxiu.yd.net.GsonRequest; import com.huxiu.yd.net.NetworkConstants; import com.huxiu.yd.net.NetworkHelper; import com.huxiu.yd.net.model.DiscoveryItem; import com.huxiu.yd.net.responses.DiscoveryListResponse; import com.huxiu.yd.utils.Utils; import com.makeramen.roundedimageview.RoundedImageView; import com.nostra13.universalimageloader.core.ImageLoader; import com.nostra13.universalimageloader.core.listener.PauseOnScrollListener; import java.util.ArrayList; import java.util.Collections; import java.util.LinkedHashMap; import java.util.List; import java.util.Map; import butterknife.ButterKnife; import butterknife.InjectView; public class JiFenActivity2 extends BaseActivity implements PullToRefreshBase.OnRefreshListener2<ListView>, View.OnClickListener { @InjectView(R.id.back) ImageView back; @InjectView(R.id.title) TextView title; @InjectView(R.id.right_text) TextView rightText; FrameLayout qiandao_frame; RoundedImageView qiandao_bg; LinearLayout qiandao_ok; LinearLayout qiandao_no; TextView jifen_num; @InjectView(R.id.list_out) PullToRefreshListView list_out; ListView list; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_ji_fen2); ButterKnife.inject(this); View headerView = View.inflate(getApplicationContext(), R.layout.list_mine_header, null); qiandao_frame = (FrameLayout) headerView.findViewById(R.id.qiandao_frame); qiandao_bg = (RoundedImageView) headerView.findViewById(R.id.qiandao_bg); qiandao_ok = (LinearLayout) headerView.findViewById(R.id.qiandao_ok); qiandao_no = (LinearLayout) headerView.findViewById(R.id.qiandao_no); list = list_out.getRefreshableView(); list.setDividerHeight(0);// 隱藏listview預設的divider list.setSelector(android.R.color.transparent);// 隱藏listview預設的selector rightText.setVisibility(View.VISIBLE); rightText.setText(R.string.shuoming); rightText.setTextColor(0xffffffff); back.setOnClickListener(this); rightText.setOnClickListener(this); qiandao_frame.setOnClickListener(this); title.setText(R.string.myjifen); list.addHeaderView(headerView); list_out.setOnRefreshListener(this); list_out.setState(PullToRefreshBase.State.INIT_REFRESHING, true); PauseOnScrollListener listener = new PauseOnScrollListener(ImageLoader.getInstance(), false, true); list_out.setOnScrollListener(listener); adapter = new MyAdapter(); list.setAdapter(adapter); } @Override public void onPullDownToRefresh(PullToRefreshBase refreshView) { getItems(1); } @Override public void onPullUpToRefresh(PullToRefreshBase refreshView) { getItems(currentPage + 1); } private void refreshComplete() { list_out.postDelayed(new Runnable() { @Override public void run() { list_out.onRefreshComplete(); } }, 100); } @Override protected void onDestroy() { super.onDestroy(); ButterKnife.reset(this); NetworkHelper.getInstance().getRequestQueue().cancelAll(this); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.qiandao_frame: Utils.showToast("點選旋轉動畫"); break; case R.id.back: finish(); break; case R.id.right_text: Utils.showToast("跳到積分頁面"); break; } } private int totalPages = 0; private int currentPage = 0; private List<DiscoveryItem> items = new ArrayList<>(); private void getItems(final int page) { String url = NetworkConstants.ACTION_URL; Map<String, String> params = new LinkedHashMap<>(); params.put("act", "credits_log"); params.put("page", Integer.toString(page)); GsonRequest<DiscoveryListResponse> request = new GsonRequest<>(url, Request.Method.POST, DiscoveryListResponse.class, true, params, new Response.Listener<DiscoveryListResponse>() { @Override public void onResponse(DiscoveryListResponse response) { if (response.isSuccess()) { if (page == 1 || page == 0) { items.clear(); } if (list_out != null) { if (response.page == response.max_page) { list_out.setMode(PullToRefreshBase.Mode.PULL_FROM_START); } else { list_out.setMode(PullToRefreshBase.Mode.BOTH); } } Collections.addAll(items, response.data); adapter.notifyDataSetChanged(); currentPage = response.page; } else { Utils.showToast(response.msg); } refreshComplete(); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError volleyError) { Utils.showToast(R.string.generic_failure); refreshComplete(); } }); NetworkHelper.getInstance().addToRequestQueue(request); } private MyAdapter adapter; class MyAdapter extends BaseAdapter { @Override public int getCount() { return items.size(); } @Override public Object getItem(int position) { return items.get(position); } @Override public long getItemId(int position) { return 0; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder vh; View v = convertView; if (v == null) { v = getLayoutInflater().inflate(R.layout.item_jifen_list, parent, false); vh = new ViewHolder(v); v.setTag(vh); } final DiscoveryItem item = items.get(position); vh = (ViewHolder) v.getTag(); vh.jifen_type.setText(item.message); vh.jifen_time.setText(Utils.getDateString(item.create_time)); vh.jifen_num.setText("+" + item.value); return v; } } class ViewHolder { @InjectView(R.id.jifen_type) TextView jifen_type; @InjectView(R.id.jifen_time) TextView jifen_time; @InjectView(R.id.jifen_num) TextView jifen_num; ViewHolder(View view) { ButterKnife.inject(this, view); } } }
貼一下上面activity的佈局檔案
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/white" android:orientation="vertical"> <include android:id="@+id/header" layout="@layout/header"/> <com.handmark.pulltorefresh.library.PullToRefreshListView android:id="@+id/list_out" xmlns:ptr="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:divider="@null" android:footerDividersEnabled="false" android:listSelector="@android:color/transparent" ptr:ptrHeaderTextColor="@color/gray4" ptr:ptrMode="both" tools:listitem="@layout/discovery_list_item"/> </LinearLayout>
二，在fragment中為PullToRefresh新增頭
package com.shitou.googleplay.ui.fragment;
import java.util.ArrayList;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.content.Intent;
import android.os.Handler;
import android.support.v4.view.ViewPager;
import android.text.TextUtils;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.LinearLayout.LayoutParams;
import android.widget.ListView;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener;
import com.handmark.pulltorefresh.library.PullToRefreshListView;
import com.googleplay.R;
import com.shitou.googleplay.bean.AppInfo;
import com.shitou.googleplay.bean.Home;
import com.shitou.googleplay.http.HttpHelper;
import com.shitou.googleplay.http.Url;
import com.shitou.googleplay.ui.activity.AppDetailActivity;
import com.shitou.googleplay.ui.adapter.HomeAdapter;
import com.shitou.googleplay.ui.adapter.HomePagerAdapter;
import com.shitou.googleplay.util.CommonUtil;
import com.shitou.googleplay.util.JsonUtil;
import com.shitou.googleplay.util.LogUtil;
public class HomeFragment extends BaseFragment {
private PullToRefreshListView refreshListView;
private ViewPager homePager;
private HomeAdapter homeAdapter;
private ArrayList<AppInfo> list = new ArrayList<AppInfo>();
private ListView listView;
private HomePagerAdapter homePagerAdapter;
private Handler handler = new Handler(){
public void handleMessage(android.os.Message msg) {
homePager.setCurrentItem(homePager.getCurrentItem()+1);
handler.sendEmptyMessageDelayed(0, 3000);
};
};
@Override
protected View getSuccessView() {
initRefreshListView();//初始化PullToRefreshListView
initHeaderView();//新增頭部的ViewPager
//設定Adapter
homeAdapter = new HomeAdapter(list);
listView.setAdapter(homeAdapter);
return refreshListView;
}
/**
* 初始化PullToRefreshListView
*/
private void initRefreshListView() {
// 1.初始化refreshListView，並且給它設定重新整理監聽
refreshListView = (PullToRefreshListView) View.inflate(getActivity(),
R.layout.ptr_listview, null);
refreshListView.setMode(Mode.BOTH);// 設定兩邊都可以啦
refreshListView.setOnRefreshListener(new OnRefreshListener<ListView>() {
/**
* 上拉重新整理和下拉載入更多都會執行該方法
*
* @param refreshView
*/
@Override
public void onRefresh(PullToRefreshBase<ListView> refreshView) {
if (refreshListView.getCurrentMode() == Mode.PULL_FROM_START) {
// 下拉重新整理
CommonUtil.runOnUIThread(new Runnable() {
@Override
public void run() {
refreshListView.onRefreshComplete();// 完成重新整理的方法
}
});
} else {
// 上拉載入更多,應該載入下一頁的資料
contentPage.loadDataAndRefreshPage();
}
}
});
listView = refreshListView.getRefreshableView();
listView.setDividerHeight(0);// 隱藏listview預設的divider
listView.setSelector(android.R.color.transparent);// 隱藏listview預設的selector
//給listView增加item點選事件
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// LogUtil.e(this, "position:"+position);
Intent intent = new Intent(getActivity(),AppDetailActivity.class);
intent.putExtra("packageName",list.get(position-2).getPackageName());
startActivity(intent);
}
});
}
/**
* 初始化headerView
*/
private void initHeaderView(){
View headerView = View.inflate(getActivity(), R.layout.layout_home_pager, null);
homePager = (ViewPager) headerView.findViewById(R.id.homePager);
//1.計算出ViewPager的寬度
float width = getActivity().getWindowManager().getDefaultDisplay().getWidth();
//2.根據圖片的寬高比，計算出對應的高度，寬高比是2.65
float height = width/2.65f;
//3.將計算出來的高度重新賦值給VIewPager的高度
LayoutParams layoutParams = (LayoutParams) homePager.getLayoutParams();
layoutParams.height = (int) height;//重新給佈局引數設定
homePager.setLayoutParams(layoutParams);
// homePager.requestLayout();//也可以這樣寫
listView.addHeaderView(headerView);
}
@Override
protected Object requestData() {
String result = HttpHelper.get(Url.Home + list.size());
final Home home = JsonUtil.parseJsonToBean(result, Home.class);
if (home != null) {
// 更新資料
list.addAll(home.getList());
CommonUtil.runOnUIThread(new Runnable() {
@Override
public void run() {
//由於輪播圖的url資料，只有在載入第一頁的時候才有，
if(home.getPicture()!=null && home.getPicture().size()>0){
//表明是第一頁載入資料，此時是有輪播圖url的資料
homePagerAdapter = new HomePagerAdapter(home.getPicture());
homePager.setAdapter(homePagerAdapter);
//一開始設定選中的是中間的item
homePager.setCurrentItem(home.getPicture().size()*10000);
}
// 更新adapter
homeAdapter.notifyDataSetChanged();
// 完成重新整理
refreshListView.onRefreshComplete();// 完成重新整理的方法
}
});
}
return home;
}
@Override
public void onStart() {
super.onStart();
//傳送延時訊息
handler.sendEmptyMessageDelayed(0, 3000);
}
@Override
public void onStop() {
super.onStop();
//移除訊息
handler.removeCallbacksAndMessages(null);
}
/**
* 使用JSONObject解析json
*
* @param json
* @return
*/
private Home parseJson(String json) {
if (TextUtils.isEmpty(json))
return null;
Home home = new Home();
try {
JSONObject jsonObject = new JSONObject(json);
// 1.解析picture欄位
ArrayList<String> picture = new ArrayList<String>();
JSONArray pictureArray = jsonObject.getJSONArray("picture");
for (int i = 0; i < pictureArray.length(); i++) {
String string = pictureArray.getString(i);
picture.add(string);
}
home.setPicture(picture);
// 2.解析list欄位
ArrayList<AppInfo> list = new ArrayList<AppInfo>();
JSONArray listArray = jsonObject.getJSONArray("list");
for (int i = 0; i < listArray.length(); i++) {
JSONObject object = listArray.getJSONObject(i);
AppInfo appInfo = new AppInfo();
appInfo.setDes(object.getString("des"));
appInfo.setDownloadUrl(object.getString("downloadUrl"));
appInfo.setIconUrl(object.getString("iconUrl"));
appInfo.setId(object.getInt("id"));
appInfo.setName(object.getString("name"));
appInfo.setPackageName(object.getString("packageName"));
appInfo.setSize(object.getLong("size"));
appInfo.setStars((float) object.getDouble("stars"));
list.add(appInfo);
}
home.setList(list);
} catch (JSONException e) {
e.printStackTrace();
}
return home;
}
}