安卓高级2 swipeReferenceLayout 使用案例 和完善其自定义上拉
swipeReferenceLayout 无法完成上来加载数据所以自定义了一个类
Activity.java
package qianfeng.com.swipelayoutdemo;
import android.graphics.Color;
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 android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private SwipeRefreshLayout swipeRefreshLayout;
private List<String> list = new ArrayList<>();
private ListView listView;
private ReferenceLayout referenceLayout;
private ListView referenceListView;
private ArrayAdapter<String> adapter;
private List<String> total = new ArrayList<>();
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case 100:
adapter.notifyDataSetChanged();
referenceLayout.setRefreshing(false);
break;
case 200:
adapter.notifyDataSetChanged();
referenceLayout.setLoadingState(false);
break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
referenceListView = (ListView) findViewById(R.id.referenceListView);
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, total);
referenceListView.setAdapter(adapter);
referenceLayout = (ReferenceLayout) findViewById(R.id.referenceLayout);
referenceLayout.setColorSchemeColors(Color.RED, Color.BLACK);
referenceLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
// 下拉刷新的监听器
total.clear();
initData(100);
}
});
referenceLayout.setOnLoadingListener(new ReferenceLayout.OnLoadingListener() {
@Override
public void onLoading() {
//上拉加载更多的监听器
initData(200);
}
});
initData(100);
adapter.notifyDataSetChanged();
}
private void initData(final int what) {
new Thread() {
@Override
public void run() {
super.run();
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
for (int i = 0; i < 20; i++) {
total.add("景田" + i);
}
handler.sendEmptyMessage(what);
}
}.start();
}
// 默认 swipeReferenceLayout 的用法
public void defaultView() {
swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeLayout);
listView = (ListView) findViewById(R.id.listView);
// 设置颜色
swipeRefreshLayout.setColorSchemeColors(Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW);
for (int i = 0; i < 5; i++) {
list.add("xixi" + i);
}
ArrayAdapter adapte = new ArrayAdapter(this, android.R.layout.simple_list_item_1, list);
listView.setAdapter(adapte);
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
Toast.makeText(MainActivity.this, "hahahah", Toast.LENGTH_SHORT).show();
// 刷新完成后 将刷新的View 隐藏掉
// swipeRefreshLayout.setRefreshing(false);
}
});
}
}
ReferenceLayout.java 自定义
package qianfeng.com.swipelayoutdemo;
import android.content.Context;
import android.support.v4.widget.SwipeRefreshLayout;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AbsListView;
import android.widget.ListView;
/**
* Created by ${Mr.Zhao} on 2016/10/18.
*/
public class ReferenceLayout extends SwipeRefreshLayout implements AbsListView.OnScrollListener {
//2. 实例化接口对象
private OnLoadingListener listener;
private View footerView;
private ListView mListView;
private boolean isLoading = false;
//1. 定义 一个接口
public interface OnLoadingListener {
public void onLoading();
}
//3. 提供设置监听器的方法
public void setOnLoadingListener(OnLoadingListener listener) {
this.listener = listener;
}
// 4. 构造布局
public ReferenceLayout(Context context) {
super(context);
initFooterView(context);
}
public ReferenceLayout(Context context, AttributeSet attrs) {
super(context, attrs);
initFooterView(context);
}
// 实例化 一个 加载更多的时候的 底布局
private void initFooterView(Context context) {
footerView = LayoutInflater.from(context).inflate(R.layout.footer_layout, null);
}
// 6 创建一个方法 用来 添加或者移除 footerView
public void setLoadingState(boolean state) {
isLoading = state;
if (state) {
mListView.addFooterView(footerView);
} else {
mListView.removeFooterView(footerView);
}
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
// 5. 获取 ListView
int childCount = getChildCount();
if (childCount > 0) {
for (int i = 0; i < childCount; i++) {
View view = getChildAt(i);
if (view instanceof ListView) {
mListView = (ListView) view;
mListView.setOnScrollListener(this);
}
}
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
// 7 判断ListView 滑动到了 底部
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (firstVisibleItem + visibleItemCount == totalItemCount && !isLoading) {
setLoadingState(true);
listener.onLoading();
}
}
}布局文件:
<?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"
tools:context="qianfeng.com.swipelayoutdemo.MainActivity">
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone">
<ListView
android:id="@+id/listView"
android:layout_width="match_parent"
android:layout_height="match_parent"></ListView>
</android.support.v4.widget.SwipeRefreshLayout>
<qianfeng.com.swipelayoutdemo.ReferenceLayout
android:id="@+id/referenceLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="@+id/referenceListView"
android:layout_width="match_parent"
android:layout_height="match_parent"></ListView>
</qianfeng.com.swipelayoutdemo.ReferenceLayout>
</RelativeLayout>
其上拉布局
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/footer_tv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:text="加载更多"
android:textSize="20sp" />
</LinearLayout>
