google推出的SwipeRefreshLayout下拉刷新用法
SwipeRefreshLayout是Google在support v4 19.1版本的library更新的一个下拉刷新组件,实现刷新效果更方便。
使用如下:
1.先下载android-support-v4.jar最新版本,之前的版本是没有SwipeRefreshLayout下拉刷新控件的,如果已经更新,此步骤可省略。
2.在xml文件中引用android.support.v4.widget.SwipeRefreshLayout控件,在里面可以放置任何一个控件,例如ListView,gridview等。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <android.support.v4.widget.SwipeRefreshLayout android:id="@+id/swipe_refresh" android:layout_width="match_parent" android:layout_height="match_parent" > <ListView android:id="@+id/listview" android:layout_width="match_parent" android:layout_height="match_parent" > </ListView> </android.support.v4.widget.SwipeRefreshLayout> </LinearLayout>
3.在java文件中使用。
import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.support.v4.widget.SwipeRefreshLayout; import android.widget.ListView; /** * 主页 * @author */ public class MainActivity extends Activity implements SwipeRefreshLayout.OnRefreshListener { /** * 给ListView添加下拉刷新 */ private SwipeRefreshLayout swipeLayout; /** * ListView */ private ListView listView; /** * ListView适配器 */ private ListViewAdapter adapter; private List<ItemInfo> infoList; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); swipeLayout = (SwipeRefreshLayout) this.findViewById(R.id.swipe_refresh); swipeLayout.setOnRefreshListener(this); // 顶部刷新的样式 swipeLayout.setColorScheme(android.R.color.holo_red_light, android.R.color.holo_green_light, android.R.color.holo_blue_bright, android.R.color.holo_orange_light); infoList = new ArrayList<ItemInfo>(); ItemInfo info = new ItemInfo(); info.setName("coin"); infoList.add(info); listView = (ListView) this.findViewById(R.id.listview); adapter = new ListViewAdapter(this, infoList); listView.setAdapter(adapter); } public void onRefresh() { new Handler().postDelayed(new Runnable() { public void run() { swipeLayout.setRefreshing(false); ItemInfo info = new ItemInfo(); info.setName("coin-refresh"); infoList.add(info); adapter.notifyDataSetChanged(); } }, 500); } }