android 模仿知乎下拉刷新和上拉加载

效果图如下

activity_main.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="net.sytm.swiperefreshlayout.MainActivity"> <android.support.v4.widget.SwipeRefreshLayout android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/swipe_id"> <net.sytm.widget.CustomerListView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/list_view_id" /> </android.support.v4.widget.SwipeRefreshLayout> </RelativeLayout> MainActivity.java

package net.sytm.swiperefreshlayout; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.v4.widget.SwipeRefreshLayout; import android.support.v7.app.AppCompatActivity; import android.widget.ArrayAdapter; import net.sytm.widget.CustomerListView; import java.lang.ref.WeakReference; import java.util.ArrayList; import java.util.List; public class MainActivity extends AppCompatActivity implements CustomerListView.Callback { private MHandler mHandler; private SwipeRefreshLayout refreshLayout; private CustomerListView listView; private List<String> list; private ArrayAdapter<String> adapter; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mHandler = new MHandler(this); initUI(); bindData(); } private void initUI() { refreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_id); refreshLayout.setColorSchemeResources( android.R.color.holo_blue_bright, android.R.color.holo_green_light, android.R.color.holo_orange_light, android.R.color.holo_red_light); refreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { downData(); } }); listView = (CustomerListView) findViewById(R.id.list_view_id); listView.setCallback(this); } private void bindData() { list = new ArrayList<>(); for (int i = 0; i< 3; i++) { list.add(String.valueOf(i)); } adapter = new ArrayAdapter<>(this, android.R.layout.simple_expandable_list_item_1, list); listView.setAdapter(adapter); } @Override public void downData() { mHandler.sendEmptyMessageDelayed(0, 2000); } @Override public void loadData() { mHandler.sendEmptyMessageDelayed(1, 2000); } static class MHandler extends Handler { final WeakReference<MainActivity> activityWeakReference; MHandler(MainActivity activity) { this.activityWeakReference = new WeakReference<>(activity); } @Override public void handleMessage(Message msg) { MainActivity activity = activityWeakReference.get(); if (activity == null) { return; } switch (msg.what) { case 0: activity.list.add("hutao"); activity.adapter.notifyDataSetChanged(); activity.refreshLayout.setRefreshing(false); break; case 1: activity.list.add("php"); activity.adapter.notifyDataSetChanged(); activity.listView.hideFootView(); break; } } } } foot_view.xml

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center"> <ProgressBar android:layout_width="wrap_content" android:layout_height="wrap_content" style="@style/Widget.AppCompat.ProgressBar"/> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="加载更多" android:textColor="@android:color/darker_gray"/> </LinearLayout> CustomerListView.java

package net.sytm.widget; import android.content.Context; import android.util.AttributeSet; import android.view.LayoutInflater; import android.view.View; import android.widget.AbsListView; import android.widget.ListView; import net.sytm.swiperefreshlayout.R; /** * 编码人 胡桃 * 日期 2016/7/25 */ public class CustomerListView extends ListView implements AbsListView.OnScrollListener { private Context context; private Callback callback; private View footView; public CustomerListView(Context context, AttributeSet attrs) { super(context, attrs); this.context = context; initUI(); } private void initUI() { footView = LayoutInflater.from(context).inflate(R.layout.foot_view, null); footView.setVisibility(View.GONE); this.addFooterView(footView); this.setFooterDividersEnabled(false); this.setOnScrollListener(this); } @Override public void onScrollStateChanged(AbsListView view, int scrollState) { if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE && this.getLastVisiblePosition() == this.getCount() - 1) { footView.setVisibility(View.VISIBLE); callback.loadData(); } } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { //int lastIndex = firstVisibleItem + visibleItemCount - 1 - 1; } public void hideFootView() { footView.setVisibility(View.GONE); } public void setCallback(Callback callback) { this.callback = callback; } public interface Callback { void downData(); void loadData(); } }

源码下载地址 http://download.csdn.net/detail/hu285279904/9655839