Android--开发--下拉刷新控件（ListView好ScrollView版）.rar

package com.nono.refreshDemo; import android.content.Context; import android.util.AttributeSet; import android.util.Log; import android.view.Gravity; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.ScrollView; import android.widget.Scroller; import android.widget.TextView; /** * 刷新控制view * * @author Nono * */ public class RefreshableView extends LinearLayout { private static final String TAG = "LILITH"; private Scroller scroller; private View refreshView; private ImageView refreshIndicatorView; private int refreshTargetTop = -60; private ProgressBar bar; private TextView downTextView; private TextView timeTextView; private RefreshListener refreshListener; private String downTextString; private String releaseTextString; private Long refreshTime = null; private int lastX; private int lastY; // 拉动标记 private boolean isDragging = false; // 是否可刷新标记 private boolean isRefreshEnabled = true; // 在刷新中标记 private boolean isRefreshing = false; private Context mContext; public RefreshableView(Context context) { super(context); mContext = context; } public RefreshableView(Context context, AttributeSet attrs) { super(context, attrs); mContext = context; init(); } private void init() { // TODO Auto-generated method stub //滑动对象， scroller = new Scroller(mContext); //刷新视图顶端的的view refreshView = LayoutInflater.from(mContext).inflate(R.layout.refresh_top_item, null); //指示器view refreshIndicatorView = (ImageView) refreshView.findViewById(R.id.indicator); //刷新bar bar = (ProgressBar) refreshView.findViewById(R.id.progress); //下拉显示text downTextView = (TextView) refreshView.findViewById(R.id.refresh_hint); //下来显示时间 timeTextView = (TextView) refreshView.findViewById(R.id.refresh_time); LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, -refreshTargetTop); lp.topMargin = refreshTargetTop; lp.gravity = Gravity.CENTER; addView(refreshView, lp); downTextString = mContext.getResources().getString(R.string.refresh_down_text); releaseTextString = mContext.getResources().getString(R.string.refresh_release_text); } /** * 刷新 * @param time */ private void setRefreshText(String time) { // TODO Auto-generated method stub //timeTextView.setText(time); } @Override public boolean onTouchEvent(MotionEvent event) { int y= (int) event.getRawY(); switch (event.getAction()) { case MotionEvent.ACTION_DOWN: //记录下y坐标 lastY = y; break; case MotionEvent.ACTION_MOVE: Log.i(TAG, "ACTION_MOVE"); //y移动坐标 int m = y - lastY; if(((m < 6) && (m > -1)) || (!isDragging )){ doMovement(m); } //记录下此刻y坐标 this.lastY = y; break; case MotionEvent.ACTION_UP: Log.i(TAG, "ACTION_UP"); fling(); break; } return true; } /** * up事件处理 */ private void fling() { // TODO Auto-generated method stub LinearLayout.LayoutParams lp = (LayoutParams) refreshView.getLayoutParams(); Log.i(TAG, "fling()" + lp.topMargin); if(lp.topMargin > 0){//拉到了触发可刷新事件 refresh(); }else{ returnInitState(); } } private void returnInitState() { // TODO Auto-generated method stub LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)this.refreshView.getLayoutParams(); int i = lp.topMargin; scroller.startScroll(0, i, 0, refreshTargetTop); invalidate(); } private void refresh() { // TODO Auto-generated method stub LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)this.refreshView.getLayoutParams(); int i = lp.topMargin; refreshIndicatorView.setVisibility(View.GONE); bar.setVisibility(View.VISIBLE); timeTextView.setVisibility(View.GONE); downTextView.setVisibility(View.GONE); scroller.startScroll(0, i, 0, 0-i); invalidate(); if(refreshListener !=null){ refreshListener.onRefresh(this); isRefreshing = true; } } /** * */ @Override public void computeScroll() { // TODO Auto-generated method stub if(scroller.computeScrollOffset()){ int i = this.scroller.getCurrY(); LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams)this.refreshView.getLayoutParams(); int k = Math.max(i, refreshTargetTop); lp.topMargin = k; this.refreshView.setLayoutParams(lp); this.refreshView.invalidate(); invalidate(); } } /** * 下拉move事件处理 * @param moveY */ private void doMovement(int moveY) { // TODO Auto-generated method stub LinearLayout.LayoutParams lp = (LayoutParams) refreshView.getLayoutParams(); if(moveY > 0){ //获取view的上边距 float f1 =lp.topMargin; float f2 = moveY * 0.3F; int i = (int)(f1+f2); //修改上边距 lp.topMargin = i; //修改后刷新 refreshView.setLayoutParams(lp); refreshView.invalidate(); invalidate(); } timeTextView.setVisibility(View.VISIBLE); if(refreshTime!= null){ setRefreshTime(refreshTime); } downTextView.setVisibility(View.VISIBLE); refreshIndicatorView.setVisibility(View.VISIBLE); bar.setVisibility(View.GONE); if(lp.topMargin > 0){ downTextView.setText(R.string.refresh_release_text); refreshIndicatorView.setImageResource(R.drawable.refresh_arrow_up); }else{ downTextView.setText(R.string.refresh_down_text); refreshIndicatorView.setImageResource(R.drawable.refresh_arrow_down); } } public void setRefreshEnabled(boolean b) { this.isRefreshEnabled = b; } public void setRefreshListener(RefreshListener listener) { this.refreshListener = listener; } /** * 刷新时间 * @param refreshTime2 */ private void setRefreshTime(Long time) { // TODO Auto-generated method stub } /** * 结束刷新事件 */ public void finishRefresh(){ Log.i(TAG, "执行了=====finishRefresh"); LinearLayout.LayoutParams lp= (LinearLayout.LayoutParams)this.refreshView.getLayoutParams(); int i = lp.topMargin; refreshIndicatorView.setVisibility(View.VISIBLE); timeTextView.setVisibility(View.VISIBLE); scroller.startScroll(0, i, 0, refreshTargetTop); invalidate(); isRefreshing = false; } /*该方法一般和ontouchEvent 一起用 * (non-Javadoc) * @see android.view.ViewGroup#onInterceptTouchEvent(android.view.MotionEvent) */ @Override public boolean onInterceptTouchEvent(MotionEvent e) { // TODO Auto-generated method stub int action = e.getAction(); int y= (int) e.getRawY(); switch (action) { case MotionEvent.ACTION_DOWN: lastY = y; break; case MotionEvent.ACTION_MOVE: //y移动坐标 int m = y - lastY; //记录下此刻y坐标 this.lastY = y; if(m > 6 && canScroll()){ return true; } break; case MotionEvent.ACTION_UP: break; case MotionEvent.ACTION_CANCEL: break; } return false; } private boolean canScroll() { // TODO Auto-generated method stub View childView; if(getChildCount()>1){ childView = this.getChildAt(1); if(childView instanceof ListView){ int top =((ListView)childView).getChildAt(0).getTop(); int pad =((ListView)childView).getListPaddingTop(); if((Math.abs(top-pad)) < 3&& ((ListView) childView).getFirstVisiblePosition() == 0){ return true; }else{ return false; } }else if(childView instanceof Scro