package com.sin.android.ui; import android.content.Context; import android.util.AttributeSet; import android.view.Gravity; import android.view.MotionEvent; import android.view.View; import android.widget.AbsListView; import android.widget.AbsListView.OnScrollListener; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.TextView; /**  * 動態刷新和加載數據ListView  * @author RobinTang  *  */ public class DynamicListView extends ListView implements OnScrollListener {   /**    * 監聽器    * 監聽控件的刷新或者加載更多事件    * 所有的條目事件都會有一個偏移量，也就是position應該減1才是你適配器中的條目    * @author RobinTang    *    */   public interface DynamicListViewListener {     /**      *      * @param dynamicListView      * @param isRefresh 為true的時候代表的是刷新，為false的時候代表的是加載更多      * @return true:刷新或者加載更多動作完成，刷新或者加載更多的動畫自動消失 false:刷新或者加載更多為完成，需要在數據加載完成之后去調用控件的doneRefresh()或者doneMore()方法      */     public boolean onRefreshOrMore(DynamicListView dynamicListView, boolean isRefresh);   }   /**    * 狀態控件（StatusView，列表頭上和底端的）的狀態枚舉    * @author RobinTang    *    */   enum RefreshStatus {     none, normal, willrefresh, refreshing   }   /**    * 狀態控件    * @author RobinTang    *    */   class StatusView extends LinearLayout {     public int height;     public int width;     private ProgressBar progressBar = null;     private TextView textView = null;     private RefreshStatus refreshStatus = RefreshStatus.none;     private String normalString = "下拉刷新";     private String willrefreshString = "松開刷新";     private String refreshingString = "正在刷新";     public StatusView(Context context, AttributeSet attrs) {       super(context, attrs);       initThis(context);     }     public StatusView(Context context) {       super(context);       initThis(context);     }     private void initThis(Context context) {       this.setOrientation(LinearLayout.HORIZONTAL);       this.setGravity(Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL);       progressBar = new ProgressBar(context);       progressBar.setLayoutParams(new LinearLayout.LayoutParams(30, 30));       textView = new TextView(context);       textView.setPadding(5, 0, 0, 0);       this.addView(progressBar);       this.addView(textView);       int w = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);       int h = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);       this.measure(w, h);       height = this.getMeasuredHeight();       width = this.getMeasuredWidth();       this.setRefreshStatus(RefreshStatus.normal);     }     public RefreshStatus getRefreshStatus() {       return refreshStatus;     }     public void setRefreshStatus(RefreshStatus refreshStatus) {       if (this.refreshStatus != refreshStatus) {         this.refreshStatus = refreshStatus;         if(refreshStatus == RefreshStatus.refreshing){           this.progressBar.setVisibility(View.VISIBLE);         }         else{           this.progressBar.setVisibility(View.GONE);         }         refreshStatusString();         this.invalidate();       }     }     private void refreshStatusString() {       switch (refreshStatus) {       case normal:         textView.setText(normalString);         progressBar.setProgress(0);         break;       case willrefresh:         textView.setText(willrefreshString);         break;       case refreshing:         textView.setText(refreshingString);         break;       default:         break;       }     }     /**      * 設置狀態字符串      * @param normalString 平時的字符串      * @param willrefreshString 松開后刷新（或加載）的字符串      * @param refreshingString 正在刷新（或加載）的字符串      */     public void setStatusStrings(String normalString, String willrefreshString, String refreshingString){       this.normalString = normalString;       this.willrefreshString = willrefreshString;       this.refreshingString = refreshingString;       this.refreshStatusString();     }   }   private StatusView refreshView;   private StatusView moreView;   private int itemFlag = -1;   private boolean isRecorded = false;   private int downY = -1;   private final float minTimesToRefresh = 1.5f;   private final static int ITEM_FLAG_FIRST = 1;   private final static int ITEM_FLAG_NONE = 0;   private final static int ITEM_FLAG_LAST = -1;   // 兩個監聽器   private DynamicListViewListener onRefreshListener;   private DynamicListViewListener onMoreListener;   // 滾動到低端的時候是否自動加載更多   private boolean doMoreWhenBottom = false;   public DynamicListView(Context context, AttributeSet attrs, int defStyle) {     super(context, attrs, defStyle);     initThis(context);   }   public DynamicListView(Context context, AttributeSet attrs) {     super(context, attrs);     initThis(context);   }   public DynamicListView(Context context) {     super(context);     initThis(context);   }   private void initThis(Context context) {     refreshView = new StatusView(context);     moreView = new StatusView(context);     refreshView.setStatusStrings("繼續下拉刷新數據...", "松開之后刷新數據...", "正在刷新數據...");     moreView.setStatusStrings("繼續上拉加載數據...", "松開之后加載數據...", "正在加載數據...");     this.addHeaderView(refreshView, null, false);     this.addFooterView(moreView, null, false);     this.setOnScrollListener(this);     doneRefresh();     doneMore();   }   // 監聽器操作   public DynamicListViewListener getOnRefreshListener() {     return onRefreshListener;   }   public void setOnRefreshListener(DynamicListViewListener onRefreshListener) {     this.onRefreshListener = onRefreshListener;   }   public DynamicListViewListener getOnMoreListener() {     return onMoreListener;   }   public void setOnMoreListener(DynamicListViewListener onMoreListener) {     this.onMoreListener = onMoreListener;   }   // 設置   public boolean isDoMoreWhenBottom() {     return doMoreWhenBottom;   }   public void setDoMoreWhenBottom(boolean doMoreWhenBottom) {     this.doMoreWhenBottom = doMoreWhenBottom;   }   @Override   public void onScroll(AbsListView l, int t, int oldl, int count) {     // log("%d %d %d", t, oldl, count);     if (t == 0)       itemFlag = ITEM_FLAG_FIRST;     else if ((t + oldl) == count){       itemFlag = ITEM_FLAG_LAST;       if(doMoreWhenBottom && onMoreListener != null && moreView.getRefreshStatus() != RefreshStatus.refreshing){           doMore();       }     }     else {       itemFlag = ITEM_FLAG_NONE; //     isRecorded = false;     }   }   @Override   public void onScrollStateChanged(AbsListView arg0, int arg1) {   }   @Override   public boolean onTouchEvent(MotionEvent ev) {     switch (ev.getAction()) {     case MotionEvent.ACTION_DOWN:       if (isRecorded == false && (itemFlag == ITEM_FLAG_FIRST && onRefreshListener != null && refreshView.getRefreshStatus() == RefreshStatus.normal || itemFlag == ITEM_FLAG_LAST && onMoreListener != null && moreView.getRefreshStatus() == RefreshStatus.normal)) {         downY = (int) ev.getY(0);         isRecorded = true; //       log("按下，記錄：%d flag:%d", downY, itemFlag);       }       break;     case MotionEvent.ACTION_UP: {       isRecorded = false;       if (onRefreshListener != null && refreshView.getRefreshStatus() == RefreshStatus.willrefresh) {         doRefresh();       } else if (refreshView.getRefreshStatus() == RefreshStatus.normal) {         refreshView.setPadding(0, -1 * refreshView.height, 0, 0);       }       if (onMoreListener != null && moreView.getRefreshStatus() == RefreshStatus.willrefresh) {         doMore();       } else if (moreView.getRefreshStatus() == RefreshStatus.normal) {         moreView.setPadding(0, 0, 0, -1 * moreView.height);       }       break;     }     case MotionEvent.ACTION_MOVE: {       if (isRecorded == false && (itemFlag == ITEM_FLAG_FIRST && onRefreshListener != null && refreshView.getRefreshStatus() == RefreshStatus.normal ||            itemFlag == ITEM_FLAG_LAST && onMoreListener != null && moreView.getRefreshStatus() == RefreshStatus.normal)) {         downY = (int) ev.getY(0);         isRecorded = true; //       log("按下，記錄：%d flag:%d", downY, itemFlag);       } else if (isRecorded) {         int nowY = (int) ev.getY(0);         int offset = nowY - downY;         if (offset > 0 && itemFlag == ITEM_FLAG_FIRST) {           // 下拉           setSelection(0);           if (offset >= (minTimesToRefresh * refreshView.height)) {             refreshView.setRefreshStatus(RefreshStatus.willrefresh);           } else {             refreshView.setRefreshStatus(RefreshStatus.normal);           }           refreshView.setPadding(0, -1 * (refreshView.height - offset), 0, 0);         } else if(itemFlag == ITEM_FLAG_LAST){           // 上拉           setSelection(this.getCount());           if (offset <= -1 * (minTimesToRefresh * moreView.height)) {             moreView.setRefreshStatus(RefreshStatus.willrefresh);           } else {             moreView.setRefreshStatus(RefreshStatus.normal);          }           moreView.setPadding(0, 0, 0, -1 * (moreView.height + offset));        } //       log("位移:%d", offset);       }       break;     }     default:       break;     }     return super.onTouchEvent(ev);   }   /**    * 開始刷新    */   private void doRefresh(){ //   log("開始刷新");     refreshView.setRefreshStatus(RefreshStatus.refreshing);     refreshView.setPadding(0, 0, 0, 0);     if(onRefreshListener.onRefreshOrMore(this, true))       doneRefresh();   }   /**    * 開始加載更多    */   private void doMore(){ //   log("加載更多");     moreView.setRefreshStatus(RefreshStatus.refreshing);     moreView.setPadding(0, 0, 0, 0);     if(onMoreListener.onRefreshOrMore(this, false))       doneMore();   }   /**    * 刷新完成之后調用，用于取消刷新的動畫    */   public void doneRefresh() { //   log("刷新完成!");     refreshView.setRefreshStatus(RefreshStatus.normal);     refreshView.setPadding(0, -1 * refreshView.height, 0, 0);   }   /**    * 加載更多完成之后調用，用于取消加載更多的動畫    */   public void doneMore() { //   log("加載完成!");     moreView.setRefreshStatus(RefreshStatus.normal);     moreView.setPadding(0, 0, 0, -1 * moreView.height);   }   /**    * 獲取刷新的狀態    * @return 一般 將要刷新 刷新完成    */   public RefreshStatus getRefreshStatus(){     return refreshView.getRefreshStatus();   }   /**    * 獲取加載更多的狀態    * @return 一般 將要加載 加載完成    */   public RefreshStatus getMoreStatus(){     return moreView.getRefreshStatus();   } // private void log(Object obj) { //   log("%s", obj.toString()); // } // // private void log(String format, Object... args) { //   Log.i("DynamicListView", String.format(format, args)); // } } 

package com.sin.android.ui; import java.util.ArrayList; import java.util.Date; import android.annotation.SuppressLint; import android.app.Activity; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.Toast; import com.sin.android.ui.DynamicListView.DynamicListViewListener; @SuppressLint("HandlerLeak") public class MainActivity extends Activity implements DynamicListViewListener {   DynamicListView listView;   ArrayList<String> data;   ArrayAdapter<String> adapter;   // 用于刷新控件狀態   Handler handler = new Handler() {     @Override     public void handleMessage(Message msg) {       if (msg.what == 0) {         adapter.notifyDataSetChanged();         listView.doneRefresh();         Toast.makeText(MainActivity.this, "新加載"+msg.arg1+"條數據!", Toast.LENGTH_LONG).show();       } else if (msg.what == 1) {         adapter.notifyDataSetChanged();         listView.doneMore();       } else {         super.handleMessage(msg);       }     }   };   @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     listView = new DynamicListView(this);     setContentView(listView);     data = new ArrayList<String>();     for (int i = 1; i < 10; ++i) {       data.add("原始數據" + i);     }     adapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, data);     listView.setAdapter(adapter);     listView.setOnItemClickListener(new OnItemClickListener() {       @Override       public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {         Log.i("",data.get(arg2-1));       }     });     listView.setDoMoreWhenBottom(false);  // 滾動到低端的時候不自己加載更多     listView.setOnRefreshListener(this);     listView.setOnMoreListener(this);   }   @Override   public boolean onRefreshOrMore(DynamicListView dynamicListView, boolean isRefresh) {     if (isRefresh) {       new Thread(new Runnable() {         @Override         public void run() {           // 刷新           ArrayList<String> temp = new ArrayList<String>();           for (int i = 0; i < 3; ++i) {             temp.add(0, new Date().toLocaleString());             try {               Thread.sleep(1000);             } catch (InterruptedException e) {               e.printStackTrace();             }           }           synchronized (data) {             data.addAll(0, temp);           }           Message message = new Message();           message.what = 0;           message.arg1 = temp.size();           handler.sendMessage(message);         }       }).start();     } else {       new Thread(new Runnable() {         @Override         public void run() {           // 加載更多           ArrayList<String> temp = new ArrayList<String>();           for (int i = 0; i < 3; ++i) {             temp.add(new Date().toLocaleString());             try {               Thread.sleep(1000);             } catch (InterruptedException e) {               e.printStackTrace();             }           }           synchronized (data) {             data.addAll(temp);           }           handler.sendEmptyMessage(1);         }       }).start();     }     return false;   } }