Android custom control in the ListView pull-up load with drop-down refresh

Custom Control Loadlayout

ImportAndroid.content.context;importAndroid.graphics.drawable.animatable;importAndroid.graphics.drawable.drawable;importAndroid.util.attributeset;importAndroid.view.layoutinflater;importAndroid.view.motionevent;importAndroid.view.view;importAndroid.view.viewconfiguration;importAndroid.widget.abslistview;importAndroid.widget.framelayout;importAndroid.widget.listview;importAndroid.widget.textview;importcom.xh.boke.r;/** * Custom Control ListView Pull-load * Created by Administrator on 2015/10/22 0022. */public class Loadlayout extends Framelayout implementsAbslistview.onscrolllistener {Private enumOperation {START, STOP}/** * Swipe to the bottom of the pull-up operation */private intMtouchslop; /** * ListView Instance */PrivateListView Mlistview; /** * Bottom Text */privateTextView Mfoottext; /** * Pull-up listener, to the bottom of the pull-up loading operation */PrivateOnloadlistener Monloadlistener; /** * ListView Loading in footer */privateView Mlistviewfooter; /** * y-coordinate when pressed */private intMydown; /** * The y-coordinate of the lift, when used with the mydown to swipe to the bottom to determine if it is pull-up or drop-down */private intMlasty; /** * Whether in load (pull up more) */private Boolean isloading = False; /** * @param context */publicLoadlayout (Context context) {This (context, NULL); } publicLoadlayout (context context, AttributeSet Attrs) {Super(context, attrs); Mtouchslop =Viewconfiguration.get (context). Getscaledtouchslop (); Mlistviewfooter = Layoutinflater.from (context). Inflate (R.layout.view_lv_footer, NULL, FALSE); Mfoottext =(TextView) Mlistviewfooter.findviewbyid (R.id.pull_to_refresh_loadmore_text); } @Override protected void OnLayout (Boolean changed, int left, int top, int. right, intBottom) {Super. OnLayout (changed, left, top, right, bottom); Initializes the ListView object if (Mlistview = = NULL) {Getlistview ();}} /** * Get ListView Object */private voidGetlistview () {int childs =Getchildcount (); if (Childs > 0{for (int i = 0; i < childs; i++) {View Childview =Getchildat (i); if (Childview instanceofListView) {Mlistview =(ListView) Childview; Set the scroll listener to the ListView so that scrolling can also automatically load the Mlistview.setonscrolllistener (this); }}}}/* * (non-javadoc) * @see android.view.viewgroup#dispatchtouchevent (android.view.MotionEvent) */@Override Public BooleanDispatchtouchevent (Motionevent event) {Final int action =Event.getaction (); Switch(action) {caseMotionevent.action_down://press Mydown = (int) Event.getrawy (); Break; CaseMotionevent.action_move://Move break; CaseMotionEvent.ACTION_UP:mLastY = (int) Event.getrawy (); Lift up if(Canload ()) {LoadData ();} Break; Default: Break; } return Super. Dispatchtouchevent (event); }/** * Can load more, the condition is at the bottom, the ListView is not loaded, and is a pull-up operation. * * @return * * Private BooleanCanload () {return isbottom () &&!isloading &&Ispullup (); }/** * To determine if the bottom */private BooleanIsbottom () {if (Mlistview! = null && mlistview.getadapter ()! = NULL) {return mlistview.getlastvisibleposition () = = (Mlistview.getadapter (). GetCount ()-1); } return False; }/** * is a pull-up operation * * @return */Private BooleanIspullup () {return (mydown-mlasty) >=Mtouchslop; }/** * If it is at the bottom and is a pull-up operation. Then execute the OnLoad method */private voidLoadData () {if (Monloadlistener! = null) {//Set state setloading (True); //Monloadlistener.onload (); }}/** * @param loading */public void setloading (BooleanLoading) {isloading =Loading If(isloading) {changeanimation (Operation.start); Mlistview.addfooterview (Mlistviewfooter, NULL, FALSE); } else{changeanimation (operation.stop); Mlistview.removefooterview (mlistviewfooter); mydown = 0; Mlasty = 0; }}/** * @param loadlistener */public voidSetonloadlistener (Onloadlistener loadlistener) {Monloadlistener =Loadlistener;} @Override public void onscrollstatechanged (Abslistview view, Int. scrollstate) {} @Override public void Onscroll (Absli Stview view, int firstvisibleitem, int visibleitemcount, int totalitemcount) {//scroll up to the bottom and load more if (Canload ( ) {LoadData ();}} /** * Load More Listeners * * @author mrsimple */public static interface Onloadlistener {public void onLoad ();} private Vo ID changeanimation (Operation operation) {drawable[] drawables = mfoottext.getcompounddrawables (); for ( Drawable drawable:drawables) {if (drawable! = null && drawable instanceof animatable) {animatable animata ble = ((animatable) drawable), switch (operation) {case START:animatable.start (), break, Case S TOP:animatable.stop (); Break;}} } }}

View_lv_footer.xml

<?xml version= "1.0" encoding= "Utf-8"? ><relativelayout xmlns:android= "http://schemas.android.com/apk/res/ Android "    android:layout_width=" fill_parent "    android:layout_height=" Wrap_content "    android: Background= "#ffffff"    android:gravity= "center"    android:paddingbottom= "8dip"    android:paddingtop= " 5dip ">    <textview        android:id=" @+id/pull_to_refresh_loadmore_text "        android:layout_width=" Wrap_ Content "        android:layout_height=" wrap_content "        android:layout_gravity=" center "        android:gravity=" Center "        android:paddingtop=" 5dip "        android:drawableleft=" @anim/rotating_loading "        android: drawablepadding= "8DP"        android:text= "Loading ..."        android:textappearance= "? android:attr/ Textappearancemedium "        android:textcolor=" @android: Color/black "        android:textsize=" @dimen/activity_ Horizontal_margin "        android:textstyle=" bold "/></relativelayout>

Rotating_loading.xml

<?xml version= "1.0" encoding= "Utf-8"? ><animated-rotate  xmlns:android= "http://schemas.android.com/ Apk/res/android "  android:pivotx=" 50% "  android:pivoty=" 50% "  android:drawable=" @mipmap/ic_ref "  android:duration= "Ten"/>

Use the method (implements Loadlayout.onloadlistener first, implement the load operation in the OnLoad () method)

Setcontentview (R.layout.activity_main); Loadlayout load = (loadlayout) Findviewbyid (r.id.load); Load.setonloadlistener (this);

Close loading

Load.setloading (FALSE);

Activity_main.xml

<?xml version= "1.0" encoding= "Utf-8"? ><com.xh.boke.component.loadlayout xmlns:android= "/http Schemas.android.com/apk/res/android "    android:id=" @+id/load "    android:layout_width=" Match_parent    " android:layout_height= "Match_parent" >    <listview        android:id= "@+id/lv"        android:layout_width= " Match_parent "        android:layout_height=" Match_parent "/></com.xh.boke.component.loadlayout>

Android custom control in the ListView pull-up load with drop-down refresh