Zhao yazhi _ name card holder (3) _ pull-down refresh to load more, Zhao yazhi name card holder

Source: Internet
Author: User

Zhao yazhi _ name card holder (3) _ pull-down refresh to load more, Zhao yazhi name card holder

Reprinted please indicate address: http://blog.csdn.net/zhaoyazhi2129/article/details/38751681


Create a refreshed head Layout

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:gravity="bottom"        >    <RelativeLayout        android:id="@+id/listview_header_content"        android:layout_width="fill_parent"        android:layout_height="60dp"         >        <LinearLayout            android:id="@+id/listview_header_text"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerInParent="true"            android:gravity="center"            android:orientation="vertical" >            <TextView                android:id="@+id/listview_header_hint_textview"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="@string/listview_header_hint_normal"                 android:textColor="@color/tvcolor"/>            <LinearLayout                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_marginTop="3dp" >                <TextView                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:text="@string/listview_header_last_time"                    android:textSize="12sp"                      android:textColor="@color/tvcolor"/>                <TextView                    android:id="@+id/listview_header_time"                    android:layout_width="wrap_content"                    android:layout_height="wrap_content"                    android:textSize="12sp"                     android:textColor="@color/tvcolor" />            </LinearLayout>        </LinearLayout>        <ImageView            android:id="@+id/listview_header_arrow"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignLeft="@id/listview_header_text"            android:layout_centerVertical="true"            android:layout_marginLeft="-35dp"            android:src="@drawable/listview_arrow" />        <ProgressBar            android:id="@+id/listview_header_progressbar"            android:layout_width="30dp"            android:layout_height="30dp"            android:layout_alignLeft="@id/listview_header_text"            android:layout_centerVertical="true"            android:layout_marginLeft="-40dp"            android:visibility="invisible" />    </RelativeLayout></LinearLayout>


Customize the header information in the Toolkit

PullListViewHeader. java

Package com. cards. basic. util; import android. content. context; import android. util. attributeSet; import android. view. gravity; import android. view. layoutInflater; import android. view. view; import android. view. animation. animation; import android. view. animation. rotateAnimation; import android. widget. imageView; import android. widget. linearLayout; import android. widget. progressBar; import android. widget. textView; im Port com. cards. r;/***** @ explaination pull-down to load more * @ author yazhizhao * @ time 2014-8-1 11:30:35 */public class PullListViewHeader extends LinearLayout {private LinearLayout mContainer; private ImageView mArrowImageView; private ProgressBar mProgressBar; private TextView mHintTextView; private int mState = STATE_NORMAL; private Animation mRotateUpAnim; private Animation mRotateDownAnim; private final int ROT ATE_ANIM_DURATION = 180; public final static int STATE_NORMAL = 0; public final static int STATE_READY = 1; public final static int STATE_REFRESHING = 2; public PullListViewHeader (Context context) {super (context ); initView (context);}/*** @ param context * @ param attrs */public PullListViewHeader (Context context, AttributeSet attrs) {super (context, attrs ); initView (context);} private void initView (Context Context) {// In the initial condition, set the drop-down refresh view height to 0LinearLayout. layoutParams lp = new LinearLayout. layoutParams (LayoutParams. FILL_PARENT, 0); mContainer = (LinearLayout) LayoutInflater. from (context ). inflate (R. layout. listview_header, null); addView (mContainer, lp); setGravity (Gravity. BOTTOM); mArrowImageView = (ImageView) findViewById (R. id. listview_header_arrow); mHintTextView = (TextView) findViewById (R. id. listview_header _ Hint_textview); mProgressBar = (ProgressBar) findViewById (R. id. listview_header_progressbar); mRotateUpAnim = new RotateAnimation (0.0f,-180.0f, Animation. RELATIVE_TO_SELF, 0.5f, Animation. RELATIVE_TO_SELF, 0.5f); mRotateUpAnim. setDuration (ROTATE_ANIM_DURATION); mRotateUpAnim. setFillAfter (true); mRotateDownAnim = new RotateAnimation (-180.0f, 0.0f, Animation. RELATIVE_TO_SELF, 0.5f, Animation. RELATIVE_TO_SEL F, 0.5f); mRotateDownAnim. setDuration (ROTATE_ANIM_DURATION); mRotateDownAnim. setFillAfter (true);} public void setState (int state) {if (state = mState) return; if (state = STATE_REFRESHING) {// display progress mArrowImageView. clearAnimation (); mArrowImageView. setVisibility (View. INVISIBLE); mProgressBar. setVisibility (View. VISIBLE);} else {// display the arrow picture mArrowImageView. setVisibility (View. VISIBLE); mProgressBar. setVisibili Ty (View. INVISIBLE);} switch (state) {case STATE_NORMAL: if (mState = STATE_READY) {mArrowImageView. startAnimation (mRotateDownAnim);} if (mState = STATE_REFRESHING) {mArrowImageView. clearAnimation ();} mHintTextView. setText (R. string. listview_header_hint_normal); break; case STATE_READY: if (mState! = STATE_READY) {mArrowImageView. clearAnimation (); mArrowImageView. startAnimation (mRotateUpAnim); mHintTextView. setText (R. string. listview_header_hint_ready);} break; case STATE_REFRESHING: mHintTextView. setText (R. string. listview_header_hint_loading); break; default:} mState = state;} public void setVisiableHeight (int height) {if (height <0) height = 0; LinearLayout. layoutParams lp = (LinearLayout. layoutParams) mContainer. getLayoutParams (); lp. height = height; mContainer. setLayoutParams (lp);} public int getVisiableHeight () {return mContainer. getHeight ();}}
Create the custom file PullListView. java of listview in the Toolkit
Package com. cards. basic. util; import android. content. context; import android. util. attributeSet; import android. view. motionEvent; import android. view. view; import android. view. viewTreeObserver. onGlobalLayoutListener; import android. view. animation. decelerateInterpolator; import android. widget. absListView; import android. widget. absListView. onScrollListener; import android. widget. listView; import android. widget. RelativeLayout; import android. widget. scroller; import android. widget. textView; import com. cards. r;/***** @ explaination pull-down to load more * @ author yazhizhao * @ time 2014-8-1 11:30:45 */public class PullListView extends ListView implements OnScrollListener {private float mLastY =-1; // yprivate Scroller mScroller; // used to roll back the private OnScrollListener mScrollListener; // The rollback listener // interface triggers refresh and load more private IXListViewListene R mListViewListener; // private PullListViewHeader mHeaderView; // The entire header layout is private RelativeLayout mHeaderViewContent; // The Last refreshed time layout is private TextView mHeaderTimeView; // The height of the header is private int mHeaderViewHeight; private boolean mEnablePullRefresh = true; // whether to refresh private boolean mPullRefreshing = false; // total number of private int mTotalItemCount; // for the photo scroll, scroll back to the header or footer. Private int mScrollBack; private final static int SCROLLBACK_HEADER = 0; private final static int SCROLL_DURATION = 400; // scroll back durationprivate final static float OFFSET_RADIO = 1.8f; // support iOS like pull // feature. /*** @ param context */public PullListView (Context context) {super (context); initWithContext (context);} public PullListView (Context context, AttributeSet attrs) {super (context, Ttrs); initWithContext (context);} public PullListView (Context context, AttributeSet attrs, int defStyle) {super (context, attrs, defStyle); initWithContext (context );} // ListView needs to scroll the event, which will schedule the event, the user's listener (as a proxy private void initWithContext (Context context) {mScroller = new Scroller (context, new DecelerateInterpolator (); super. setOnScrollListener (this); // initialization control mHeaderView = new PullListViewHeader (context); mHe AderViewContent = (RelativeLayout) mHeaderView. findViewById (R. id. listview_header_content); mHeaderTimeView = (TextView) mHeaderView. findViewById (R. id. listview_header_time); addHeaderView (mHeaderView); // initialize the header information mHeaderView. getViewTreeObserver (). addOnGlobalLayoutListener (new OnGlobalLayoutListener () {@ Overridepublic void onGlobalLayout () {mHeaderViewHeight = mHeaderViewContent. getHeight (); getViewTreeO Bserver (). removeGlobalOnLayoutListener (this) ;}});}/*** enable or disable the pull refresh function ** @ param enable */public void setPullRefreshEnable (boolean enable) {// whether to refresh mEnablePullRefresh = enable; // if not, refresh if (! MEnablePullRefresh) {mHeaderViewContent. setVisibility (View. INVISIBLE);} else {// if it is refreshing mHeaderViewContent. setVisibility (View. VISIBLE) ;}}/*** stop refreshing, reset title view */public void stopRefresh () {if (mPullRefreshing = true) {mPullRefreshing = false; resetHeaderHeight () ;}}/*** sets the last refresh time ** @ param time */public void setRefreshTime (String time) {mHeaderTimeView. setText (time);} private void invokeOnScrolling () {if (MScrollListener instanceof OnXScrollListener) {OnXScrollListener l = (OnXScrollListener) mScrollListener; l. onXScrolling (this) ;}} private void updateHeaderHeight (float delta) {mHeaderView. setVisiableHeight (int) delta + mHeaderView. getVisiableHeight (); if (mEnablePullRefresh &&! MPullRefreshing) {// not refreshed, update the arrow if (mHeaderView. getVisiableHeight ()> mHeaderViewHeight) {mHeaderView. setState (PullListViewHeader. STATE_READY);} else {mHeaderView. setState (PullListViewHeader. STATE_NORMAL) ;}} setSelection (0); // scroll to the top of each time}/*** reset header height */private void resetHeaderHeight () {int height = mHeaderView. getVisiableHeight (); if (height = 0) // return is not displayed; // refresh and the header is not fully displayed, and if (mPullRefresh Ing & height <= mHeaderViewHeight) {return;} int finalHeight = 0; // default value: Scroll back. // refresh and roll back to display all header information if (mPullRefreshing & height> mHeaderViewHeight) {finalHeight = mHeaderViewHeight;} mScrollBack = SCROLLBACK_HEADER; mScroller. startScroll (0, height, 0, finalHeight-height, SCROLL_DURATION); invalidate () ;}@ Overridepublic boolean onTouchEvent (MotionEvent ev) {if (mLastY =-1) {mLastY = ev. getRawY ();} sw Itch (ev. getAction () {case MotionEvent. ACTION_DOWN: mLastY = ev. getRawY (); break; case MotionEvent. ACTION_MOVE: final float deltaY = ev. getRawY ()-mLastY; mLastY = ev. getRawY (); if (getFirstVisiblePosition () = 0 & (mHeaderView. getVisiableHeight ()> 0 | deltaY> 0) {// The first item is display. The title is displayed or pulled down. updateHeaderHeight (deltaY/OFFSET_RADIO); invokeOnScrolling ();} break; default: mLastY =-1; // reset if (getFirstVisiblePos Ition () = 0) {// call to refresh if (mEnablePullRefresh & mHeaderView. getVisiableHeight ()> mHeaderViewHeight) {mPullRefreshing = true; mHeaderView. setState (PullListViewHeader. STATE_REFRESHING); if (mListViewListener! = Null) {mListViewListener. onRefresh () ;}} resetHeaderHeight () ;}break ;}return super. onTouchEvent (ev) ;}@ Overridepublic void computeScroll () {if (mScroller. computescroloffset () {if (mScrollBack = SCROLLBACK_HEADER) {mHeaderView. setVisiableHeight (mScroller. getCurrY ();} postInvalidate (); invokeOnScrolling ();} super. computeScroll () ;}@ Overridepublic void setOnScrollListener (OnScrollListener l) {mScrollLis Tener = l ;}@ Overridepublic void onScrollStateChanged (AbsListView view, int scrollState) {if (mScrollListener! = Null) {mScrollListener. onScrollStateChanged (view, scrollState) ;}@ Overridepublic void onScroll (AbsListView view, int detail, int visibleItemCount, int totalItemCount) {// the listener sent to the user mTotalItemCount = totalItemCount; if (mScrollListener! = Null) {mScrollListener. onScroll (view, firstVisibleItem, visibleItemCount, totalItemCount);} public void setXListViewListener (IXListViewListener l) {mListViewListener = l;}/*** you can listen to the List view. OnScrollListener or this one. It will call onXScrolling when the title/footer is rolled back. */Public interface OnXScrollListener extends OnScrollListener {public void onXScrolling (View view);}/*** implement this interface to get/load more events, refresh */public interface IXListViewListener {public void onRefresh (); public void onLoadMore ();}}

Use the custom PullListView file in the layout File

  <com.cards.basic.util.PullListView        android:id="@+id/lv_changelist"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:layout_below="@+id/titlebar_above"        android:layout_margin="10dp"        android:cacheColorHint="#00000000"        android:divider="#00000000"        android:fadingEdge="none"        android:listSelector="#00000000" >    </com.cards.basic.util.PullListView>

Implements the IXListViewListener interface in the corresponding activity class and inherits the onRefresh and onLoadMore methods.

Package com. cards. activity; import java. text. simpleDateFormat; import java. util. arrayList; import java. util. list; import android. app. activity; import android. content. intent; import android. content. sharedPreferences; import android. OS. bundle; import android. OS. handler; import android. OS. message; import android. view. view; import android. view. view. onClickListener; import android. widget. button; import android. widget. imageView; import android. widget. textView; import com. cards. r; import com. cards. adapter. changeCardAdapter; import com. cards. basic. util. pullListView; import com. cards. basic. util. pullListView. IXListViewListener; import com. cards. commom. common; import com. cards. commom. myApp; import com. cards. entity. findf; import com. cards. manager. changeMgr;/*** @ explaination exchange business card * @ author yazhizhao * @ time 9:30:59 */public class ChangeCardAct extends Activity implements IXListViewListener {private ChangeCardAdapter adapter; private Handler mHandler; private PullListView pointList; private List <Findf> list; private ChangeMgr changeMgr; private Button btnRegistered; private MessageThread messageThread; private SharedPreferences sp; private int size; private ImageView imageView1; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. act_change_card); // used to safely exit MyApp. getInstance (). addActivity (this); // set the title TextView tvTitleCommenCenter = (TextView) findViewById (R. id. TV _title); tvTitleCommenCenter. setText (""); // view the Exchange Request btnRegistered = (Button) findViewById (R. id. btn_right_title); btnRegistered. setOnClickListener (new OnClickListener () {public void onClick (View v) {startActivity (new Intent (). setClass (ChangeCardAct. this, ChangeReqAct. class) ;}}); // enable the messageThread thread = new MessageThread (); messageThread. start (); // get the nearby person changeMgr = new ChangeMgr (ChangeCardAct. this, handler); changeMgr. findF (); mHandler = new Handler (); // whether the exchange information changeHint ();} /***** @ explaination whether to receive the exchanged information * @ author yazhizhao * @ time 10:19:39 */private void changeHint () {sp = getSharedPreferences ("common_data", MODE_PRIVATE ); size = sp. getInt ("Status_size", 0); imageView1 = (ImageView) findViewById (R. id. imageView1); if (size> 0) {imageView1.setVisibility (View. VISIBLE);} else if (size = 0) {imageView1.setVisibility (View. GONE );}} /***** @ explaination the newly opened Thread always requests whether or not anyone exchanges * @ author yazhizhao * @ time 5:20:36 */class MessageThread extends Thread {public void run () {while (true) {try {// whether the request has been exchanged with changeMgr. friendInfo (); // whether the exchange information changeHint (); Thread. sleep (1000*6);} catch (InterruptedException e) {e. printStackTrace () ;}}}/*** Message Processing Mechanism */private Handler handler = new Handler () {@ Overridepublic void handleMessage (Message msg) {Common. cancelLoading (); switch (msg. what) {case 0: Bundle bundle = msg. getData (); ArrayList arraylist = bundle. getParcelableArrayList ("list"); list = (List <Findf>) arraylist. get (0); pointList = (PullListView) findViewById (R. id. lv_changelist); adapter = new ChangeCardAdapter (ChangeCardAct. this, list, handler); pointList. setAdapter (adapter); pointList. setXListViewListener (ChangeCardAct. this); break; case 2: pointList = (PullListView) findViewById (R. id. lv_changelist); list = new ArrayList <Findf> (); adapter = new ChangeCardAdapter (ChangeCardAct. this, list, handler); pointList. setAdapter (adapter); pointList. setXListViewListener (ChangeCardAct. this); break ;}};@ Overrideprotected void onStart () {// used to safely exit MyApp. getInstance (). addActivity (this); super. onStart ();}/***** @ explaination pull-down Refresh setting last time * @ author yazhizhao * @ time 11:10:51 * @ return */private String getCurrentDate () {SimpleDateFormat sdf = new java. text. simpleDateFormat ("yyyy-MM-dd HH: mm: ss"); String str = sdf. format (new java. util. date (); return str;}/***** @ explaination pull-down refresh * @ author yazhizhao * @ time 11:10:51 */@ Overridepublic void onRefresh () {mHandler. postDelayed (new Runnable () {@ Overridepublic void run () {onReload (); changeHint (); onLoad () ;}, 2000 );} /***** @ explaination load more * @ author yazhizhao * @ time 11:10:51 */@ Overridepublic void onLoadMore () {mHandler. postDelayed (new Runnable () {@ Overridepublic void run () {}}, 2000) ;}@ Overrideprotected void onResume () {// set the positioning status to changeMgr for the first time. findF (); changeHint (); super. onResume ();}/***** @ explaination stop refreshing and set the time * @ author yazhizhao * @ time 10:23:47 */private void onLoad () {pointList. stopRefresh (); pointList. setRefreshTime (getCurrentDate ();}/***** @ explaination refresh again * @ author yazhizhao * @ time 10:23:50 */public boolean onReload () {boolean result = true; changeMgr. findF (); return result ;}}





Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.