【SwipeRefreshLayout】Google官方下拉刷新
是否还为ListView的下拉刷新而感到困扰?是否还在寻找第三方的下拉刷新的库?不用慌,Google出了自己的下拉刷新控件了。
关于SwipeRefreshLayout
- 官方API:SwipeRefreshLayout
- SwipeRefreshLayout继承自ViewGroup,完整包地址:android.support.v4.widget.SwipeRefreshLayout。
- 使用起来很简单:只要在需要刷新的控件最外层加上SwipeRefreshLayout,然后他的child首先是可滚动的view,如ScrollView或者ListView,RecyclerView
- 注意:必须把你的support library的版本升级到19.1
Demo:
<pre>
mainlayout.xml布局文件:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:ignore="MergeRootFrame" >
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipe_container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>
</android.support.v4.widget.SwipeRefreshLayout>
</FrameLayout>
</pre>
-
代码中调用:
<pre>
package com.jabony.swiperefreshlayou;
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.widget.SwipeRefreshLayout;
import android.widget.ListView;
import com.jabony.swiperefreshlayout.R;
public class SwipRefreshLayoutActivity extends Activity implements
SwipeRefreshLayout.OnRefreshListener {
private SwipeRefreshLayout swipeLayout;
private ListView listView;
private ListViewAdapter adapter;
private ArrayList<SoftwareClassificationInfo> list; private boolean isRefresh = false;//是否刷新中@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.swipe_refresh_layout);
swipeLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_container);
swipeLayout.setOnRefreshListener(this);setColorSchemeResources(R.color.orange, R.color.green, R.color.blue);小圈圈的颜色。转一圈换一种颜色,每一圈耗时1s。
list = new ArrayList<SoftwareClassificationInfo>(); list.add(new SoftwareClassificationInfo(1, "asdas")); listView = (ListView) findViewById(R.id.list); adapter = new ListViewAdapter(this, list); listView.setAdapter(adapter);
}
public void onRefresh() { if(!isRefresh){ isRefresh = true;
new Handler().postDelayed(new Runnable() {
public void run() {
swipeLayout.setRefreshing(false);
list.add(new SoftwareClassificationInfo(2, "ass"));
adapter.notifyDataSetChanged(); isRefresh= false;
}
}, 3000); }
}
}
</pre>
需要注意的地方: -
SwipeRefreshLayout有一个Listener需要被实现然后添加入SwipeRefreshLayout对象中。在onRefresh() 方法中实现自己的业务逻辑,比如刷新ListView的数据。
-
setRefreshing(boolean): 显示或隐藏刷新进度条
-
isRefreshing(): 检查是否处于刷新状态
-
setColorScheme(): 设置进度条的颜色主题,最多能设置四种//此方法已过时,推荐setColorSchemeResources()
-
setColorSchemeResources():设置小圈的颜色,小圈每转一圈需要1s。
参考文档:
- 【SwipeRefreshLayout】Google官方下拉刷新组件
- Android SwipeRefreshLayout教程
- 这是国外一个完整的教程写的很好:Implementing Swipe to Refresh, an Android Material Design UI Pattern
- Demo的Github地址
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