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也許下拉重新整理之前,你可能會使用一些第三方的開源庫,例如PullToRefresh, ActionBar-PullToRefresh等待,但現在有的正式組成部分---SwipeRefreshLayout,SwipeRefreshLayout是Google在support v4 19.1版本號碼的library更新的一個下拉重新整理組件,使用起來非常方便,能夠非常方便的實現Google Now的重新整理效果。
使用官方內建的控制項能夠保證通用性以及風格。SwipeRefreshLayout是繼承ViewGroup。來實現下拉重新整理,它能夠包括其它組件,使用過後感覺非常easy。
<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:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context="com.example.myapplication2.app.MainActivity"> <android.support.v4.widget.SwipeRefreshLayout android:id="@+id/swip" 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></RelativeLayout>
import android.os.Handler;import android.os.Message;import android.support.v7.app.ActionBarActivity;import android.support.v4.widget.SwipeRefreshLayout;import android.support.v4.widget.SwipeRefreshLayout.OnRefreshListener;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;public class MainActivity extends ActionBarActivity implements OnRefreshListener{ private SwipeRefreshLayout swipeRefreshLayout; Handler handler = new Handler(){ @Override public void handleMessage(Message msg) { super.handleMessage(msg); swipeRefreshLayout.setRefreshing(false); } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); swipeRefreshLayout = (SwipeRefreshLayout)findViewById(R.id.swip); swipeRefreshLayout.setOnRefreshListener(this); swipeRefreshLayout.setColorScheme(android.R.color.holo_blue_bright, android.R.color.holo_green_light, android.R.color.holo_orange_light, android.R.color.holo_red_light); } @Override public void onRefresh() { handler.sendEmptyMessageDelayed(1, 5000); }}
另外,在上述onRefresh()功能被實現,以獲得資料的功能和更新資料,當您完成資料更新,轉讓swipeRefreshLayout.setRefreshing(false);要關閉重新整理。
Android內建下拉重新整理組件SwipeRefreshLayout