【Android应用源码】下拉刷新.zip

package com.laohuai.appdemo.customui.ui; import java.util.Date; import com.laohuai.appdemo.customui.R; import android.content.Context; import android.util.AttributeSet; import android.util.Log; import android.view.LayoutInflater; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.animation.LinearInterpolator; import android.view.animation.RotateAnimation; import android.widget.AbsListView; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.AbsListView.OnScrollListener; import android.widget.ProgressBar; import android.widget.TextView; public class MyListView extends ListView implements OnScrollListener { private final static int RELEASE_To_REFRESH = 0; private final static int PULL_To_REFRESH = 1; //正在刷新 private final static int REFRESHING = 2; //刷新完成 private final static int DONE = 3; private final static int LOADING = 4; private final static int RATIO = 3; private LayoutInflater inflater; private LinearLayout headView; private TextView tipsTextview; private TextView lastUpdatedTextView; private ImageView arrowImageView; private ProgressBar progressBar; private RotateAnimation animation; private RotateAnimation reverseAnimation; private boolean isRecored; private int headContentWidth; private int headContentHeight; private int startY; private int firstItemIndex; private int state; private boolean isBack; private OnRefreshListener refreshListener; private boolean isRefreshable; int i=1; public MyListView(Context context) { super(context); init(context); } public MyListView(Context context, AttributeSet attrs) { super(context, attrs); init(context); } private void init(Context context) { setCacheColorHint(context.getResources().getColor(R.color.transparent)); inflater = LayoutInflater.from(context); headView = (LinearLayout) inflater.inflate(R.layout.head, null); arrowImageView = (ImageView) headView.findViewById(R.id.head_arrowImageView); arrowImageView.setMinimumWidth(70); arrowImageView.setMinimumHeight(50); progressBar = (ProgressBar) headView.findViewById(R.id.head_progressBar); tipsTextview = (TextView) headView.findViewById(R.id.head_tipsTextView); lastUpdatedTextView = (TextView) headView.findViewById(R.id.head_lastUpdatedTextView); measureView(headView); headContentHeight = headView.getMeasuredHeight(); headContentWidth = headView.getMeasuredWidth(); headView.setPadding(0, -1 * headContentHeight, 0, 0); headView.invalidate(); Log.v("@@@@@@", "width:" + headContentWidth + " height:"+ headContentHeight); addHeaderView(headView, null, false); setOnScrollListener(this); animation = new RotateAnimation(0, -180,RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f); animation.setInterpolator(new LinearInterpolator()); animation.setDuration(250); animation.setFillAfter(true); reverseAnimation = new RotateAnimation(-180, 0,RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f); reverseAnimation.setInterpolator(new LinearInterpolator()); reverseAnimation.setDuration(200); reverseAnimation.setFillAfter(true); state = DONE; isRefreshable = false; } public void onScroll(AbsListView arg0, int firstVisiableItem, int arg2, int arg3) { firstItemIndex = firstVisiableItem; } public void onScrollStateChanged(AbsListView arg0, int arg1) { } public boolean onTouchEvent(MotionEvent event) { if (isRefreshable) { switch (event.getAction()) { case MotionEvent.ACTION_DOWN: if (firstItemIndex == 0 && !isRecored) { isRecored = true; startY = (int) event.getY(); Log.v("@@@@@@", "ACTION_DOWN 这是第 "+i+++"步" +1 ); } break; case MotionEvent.ACTION_UP: if (state != REFRESHING && state != LOADING) { if (state == DONE) { } if (state == PULL_To_REFRESH) { state = DONE; Log.v("@@@@@@", "ACTION_UP PULL_To_REFRESH and changeHeaderViewByState()" + " 这是第 "+i+++"步前"+2 ); changeHeaderViewByState(); Log.v("@@@@@@", "ACTION_UP PULL_To_REFRESH and changeHeaderViewByState() " + "这是第 "+i+++"步后"+2 ); } if (state == RELEASE_To_REFRESH) { state = REFRESHING; Log.v("@@@@@@", "ACTION_UP RELEASE_To_REFRESH changeHeaderViewByState() " + "这是第 "+i+++"步" +3); changeHeaderViewByState(); onRefresh(); Log.v("@@@@@@", "ACTION_UP RELEASE_To_REFRESH changeHeaderViewByState()" + " 这是第 "+i+++"步" +3); } } isRecored = false; isBack = false; break; case MotionEvent.ACTION_MOVE: int tempY = (int) event.getY(); if (!isRecored && firstItemIndex == 0) { isRecored = true; startY = tempY; Log.v("@@@@@@", "ACTION_MOVE 这是第 "+i+++"步" +4); } if (state != REFRESHING && isRecored && state != LOADING) { if (state == RELEASE_To_REFRESH) { setSelection(0); if (((tempY - startY) / RATIO < headContentHeight) && (tempY - startY) > 0) { state = PULL_To_REFRESH; changeHeaderViewByState(); Log.v("@@@@@@", "changeHeaderViewByState() 这是第 "+i+++"步"+5 ); } else if (tempY - startY <= 0) { state = DONE; changeHeaderViewByState(); Log.v("@@@@@@", "ACTION_MOVE RELEASE_To_REFRESH 2 changeHeaderViewByState " + "这是第 "+i+++"步" +6); } } if (state == PULL_To_REFRESH) { setSelection(0); if ((tempY - startY) / RATIO >= headContentHeight) { state = RELEASE_To_REFRESH; isBack = true; Log.v("@@@@@@", "changeHeaderViewByState " + "这是第 "+i+++"步前"+7 ); changeHeaderViewByState(); Log.v("@@@@@@", "changeHeaderViewByState " + "这是第 "+i+++"步后"+7 ); } else if (tempY - startY <= 0) { state = DONE; changeHeaderViewByState(); Log.v("@@@@@@", "ACTION_MOVE changeHeaderViewByState PULL_To_REFRESH 2" + " 这是第 "+i+++"步" +8); } } if (state == DONE) { if (tempY - startY > 0) { state = PULL_To_REFRESH; Log.v("@@@@@@", "ACTION_MOVE DONE changeHeaderViewByState " + "这是第 "+i+++"步前" +9); changeHeaderViewByState(); Log.v("@@@@@@", "ACTION_MOVE DONE changeHeaderViewByState " + "这是第 "+i+++"步后" +9); } } if (state == PULL_To_REFRESH) { headView.setPadding(0, -1 * headContentHeight+(tempY - startY) / RATIO, 0, 0); Log.v("@@@@@@", -1 * headContentHeight+(tempY - startY) / RATIO+ "ACTION_MOVE PULL_To_REFRESH 3 这是第 "+i+++"步"+10 ); } if (state == RELEASE_To_REFRESH) { headView.setPadding(0, (tempY - startY) / RATIO- headContentHeight, 0, 0); Log.v("@@@@@@", "ACTION_MOVE PULL_To_REFRESH 4 这是第 "+i+++"步" +11); } } break; } } return super.onTouchEvent(event); } private void changeHeaderViewByState() { switch (state) { case RELEASE_To_REFRESH: arrowImageView.setVisibility(View.VISIBLE); progressBar.setVisibility(View.GONE); tipsTextview.setVisibility(View.VISIBLE); lastUpdatedTextView.setVisibility(View.VISIBLE); arrowImageView.clearAnimation(); arrowImageView.startAnimation(animation); tipsTextview.setText("请释放 刷新"); Log.v("@@@@@@", "RELEASE_To_REFRESH 这是第 "+i+++"步"+12 +"请释放 刷新" ); break; case PULL_To_REFRESH: progressBar.setVisibility(View.GONE); tipsTextview.setVisibility(View.VISIBLE); lastUpdatedTextView.setVisibility(View.VISIBLE);