仿知乎下拉刷新上拉自动加载

来源：互联网发布：灌篮高手的影响力知乎编辑：程序博客网时间：2024/06/05 19:24

效果图如下

activity_main.xml

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<?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>

<?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

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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;
}
}
}
}

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

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<?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>

<?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

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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();
}
}

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);}@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {    if (scrollState == AbsListView.OnScrollListener.SCROLL_STATE_IDLE            &amp;&amp;  this.getLastVisiblePosition() == this.getCount() - 1) {        footView.setVisibility(View.VISIBLE);        callback.loadData();    }}@Overridepublic 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();}

}

http://download.csdn.NET/detail/hu285279904/9655839

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