package czd.lib.view.abslistview.pull;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.LinearInterpolator;
import android.view.animation.RotateAnimation;
import android.widget.*;
import android.widget.AbsListView.OnScrollListener;
import czd.lib.R;
import czd.lib.view.ViewUtil;
public class PullListView extends ListView implements OnScrollListener {
public static final int STATE_RELEASETOREFRESH = 0;
public static final int STATE_PULLTOREFRESH = 1;
public static final int STATE_REFRESHING = 2;
public static final int STATE_DONE = 3;
private static final int RATIO = 3;
private boolean onTop = true, onBottom = true;
private LinearLayout header;
private String _headerStatePull;
private String _headerStateRelease;
private String _headerStateLoading;
private String _headerStateDone;
private Drawable _headerBackground;
private int _headerTextColor;
private int _headerInfoVisible;
private ImageView header_iv;
private ProgressBar header_pb;
private TextView header_stv;
private TextView header_itv;
private Animation anim_up;
private Animation anim_down;
private int firstVisibleItem;
private int state = STATE_DONE;
private boolean refreshable = false;
private boolean pulling = true;
private int startY = 0;
private boolean isback = false;
private AbsListPullListener listener;
private int m = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
private int header_height = 0;
public PullListView(Context context) {
super(context);
init(context, null);
}
public PullListView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public PullListView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs) {
if (attrs != null)
{
TypedArray tattrs = context.obtainStyledAttributes(attrs, R.styleable.PullView);
this._headerStatePull = tattrs.getString(0);
this._headerStateRelease = tattrs.getString(1);
this._headerStateLoading = tattrs.getString(2);
this._headerStateDone = tattrs.getString(3);
this._headerBackground = tattrs.getDrawable(4);
this._headerTextColor = tattrs.getInt(5, android.R.color.black);
this._headerInfoVisible = tattrs.getInt(6, View.VISIBLE);
tattrs.recycle();
}
this.header = (LinearLayout)ViewUtil.viewById(context, R.layout.common_pull_header);
this.header_iv = (ImageView)this.header.findViewById(R.id.common_pull_header_image);
this.header_pb = (ProgressBar)this.header.findViewById(R.id.common_pull_header_progress);
this.header_stv = (TextView)this.header.findViewById(R.id.common_pull_header_state);
this.header_itv = (TextView)this.header.findViewById(R.id.common_pull_header_info);
this.header.setBackgroundDrawable(this._headerBackground);
this.header_iv.setVisibility(View.VISIBLE);
this.header_pb.setVisibility(View.VISIBLE);
this.header_stv.setTextColor(_headerTextColor);
this.header_itv.setTextColor(_headerTextColor);
this.header_itv.setVisibility(_headerInfoVisible);
header.measure(m, m);
header_height = header.getMeasuredHeight();
this.header.setPadding(0, -1 * header_height, 0, 0);
header.invalidate();
addHeaderView(this.header, null, false);
setOnScrollListener(this);
this.anim_up = new RotateAnimation(0, -180, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);
this.anim_up.setInterpolator(new LinearInterpolator());
this.anim_up.setDuration(250);
this.anim_up.setFillAfter(true);
this.anim_down = new RotateAnimation(-180, 0, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);
this.anim_down.setInterpolator(new LinearInterpolator());
this.anim_down.setDuration(200);
this.anim_down.setFillAfter(true);
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
this.listener.onScrollStateChanged(view, scrollState);
}
@Override
public final boolean onInterceptTouchEvent(MotionEvent event) {
if (refreshable)
{
if (event.getAction() == MotionEvent.ACTION_DOWN)
{
if (state != STATE_REFRESHING && firstVisibleItem == 0)
{
startY = (int)event.getY();
}
}
}
return super.onInterceptTouchEvent(event);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
if (refreshable)
{
switch (ev.getAction())
{
case MotionEvent.ACTION_UP:
if (startY != 0)
{
if (state != STATE_REFRESHING)
{
switch (state)
{
case STATE_PULLTOREFRESH:
state = STATE_DONE;
resetHeader();
break;
case STATE_RELEASETOREFRESH:
state = STATE_REFRESHING;
resetHeader();
onRefresh();
break;
default:
break;
}
}
isback = false;
startY = 0;
}
pulling = false;
break;
case MotionEvent.ACTION_MOVE:
if (state != STATE_REFRESHING && firstVisibleItem == 0 && startY > 0)
{
int tmpY = (int)ev.getY();
switch (state)
{
case STATE_RELEASETOREFRESH:
pulling = true;
setSelection(0);
if (tmpY <= startY)
{
state = STATE_DONE;
resetHeader();
}
else if ((tmpY - startY) / RATIO < header_height)
{
state = STATE_PULLTOREFRESH;
resetHeader();
}
break;
case STATE_PULLTOREFRESH:
pulling = true;
setSelection(0);
if (tmpY <= startY)
{
state = STATE_DONE;
resetHeader();
}
else if ((tmpY - startY) / RATIO >= header_height)
{
state = STATE_RELEASETOREFRESH;
isback = true;
resetHeader();
}
break;
case STATE_DONE:
if (tmpY > startY)
{
state = STATE_PULLTOREFRESH;
resetHeader();
pulling = true;
}
else
{
startY = 0;
}
break;
default:
break;
}
if (pulling && (state == STATE_PULLTOREFRESH || state == STATE_RELEASETOREFRESH))
{
header.setPadding(0, (tmpY - startY) / RATIO - header_height, 0, 0);
}
}
break;
}
}
return super.onTouchEvent(ev);
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
this.firstVisibleItem = firstVisibleItem;
if (pulling)
{
setSelection(0);
}
if (this.listener != null)
{
this.listener.onScrollStop(view, firstVisibleItem, visibleItemCount, totalItemCount);
}
whereami(firstVisibleItem, visibleItemCount, totalItemCount);
}
private void whereami(int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (firstVisibleItem <= 2)
{
if (!onTop && this.listener != null)
{
onTop = true;
listener.onTop(firstVisibleItem, visibleItemCount, totalItemCount);
}
}
else
{
if (onTop && listener != null)
{
onTop = false;
listener.outTop(firstVisibleItem, visibleItemCount, totalItemCount);
}
}
if (totalItemCount - visibleItemCount - firstVisibleItem + 1 <= 2)
{
if (!onBottom && listener != null)
{
onBottom = true;
listener.onBottom(firstVisibleItem, visibleItemCount, totalItemCount);
}
}
else
{
if (onBottom && listener != null)
{
onBottom = false;
listener.outBottom(firstVisibleItem, visibleItemCount, totalItemCount);
}
}
}
public int getHeaderState() {
return state;
}
public void setHeaderInfo(String text) {
this.header_itv.setText(text);
if (this.header_itv.getVisibility() != View.VISIBLE)
{
this.header_itv.setVisibility(View.VISIBLE);
}
}
public void setHeaderInfoVisible(int visible) {
this.header_itv.setVisibility(visible);
}
public void setPullListener(AbsListPullListener listener) {
this.listener = listener;
this.refreshable = true;
}
public void setHeaderDone() {
state = STATE_DONE;
resetHeader();
invalidateViews();
setSelection(0);
}
private void onRefresh() {
if (listener != null)
{
listener.onRefresh();
}
}
private void resetHeader() {
switch (state)
{
case STATE_DONE:
this.header_stv.setText(_headerStateDone);
this.header.setPadding(0, -1 * header_height, 0, 0);
this.header_pb.setVisibility(View.GONE);
this.header_iv.clearAnimation();
this.header_iv.setVisibility(View.VISIBLE);
break;
case STATE_PULLTOREFRESH:
this.header_stv.setText(_headerStatePull);
this.header_pb.setVisibility(View.GONE);
this.header_iv.setVisibility(View.VISIBLE);
if (isback)
{
isback = false;
this.header_iv.clearAnimation();
this.header_iv.startAnimation(anim_down);
}
break;
case STATE_RELEASETOREFRESH:
this.header_stv.setText(_headerStateRelease);
this.header_pb.setVisibility(View.GONE);
this.header_iv.setVisibility(View.VISIBLE);
this.header_iv.clearAnimation();
this.header_iv.startAnimation(anim_up);
break;
case STATE_REFRESHING:
this.header.setPadding(0, 0, 0, 0);
this.header_stv.setText(_headerStateLoading);
this.header_iv.clearAnimation();
this.header_iv.setVisibility(View.GONE);
this.header_pb.setVisibility(View.VISIBLE);
break;
default:
break;
}
}
}