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PullToRefreshBase.java
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2202 lines (1899 loc) · 67.7 KB
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/*******************************************************************************
* Copyright 2011, 2012 Chris Banes.
* Copyright 2013 Naver Business Platform Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
package com.handmark.pulltorefresh.library;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.os.Build.VERSION;
import android.os.Build.VERSION_CODES;
import android.os.Bundle;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.Animation.AnimationListener;
import android.view.animation.AnimationSet;
import android.view.animation.DecelerateInterpolator;
import android.view.animation.Interpolator;
import android.view.animation.TranslateAnimation;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import com.handmark.pulltorefresh.configuration.xml.PullToRefreshXmlConfiguration;
import com.handmark.pulltorefresh.library.internal.LoadingLayout;
import com.handmark.pulltorefresh.library.internal.Utils;
import com.handmark.pulltorefresh.library.internal.ViewCompat;
public abstract class PullToRefreshBase<T extends View> extends LinearLayout implements IPullToRefresh<T> {
// ===========================================================
// Constants
// ===========================================================
static final boolean DEBUG = false;
static final boolean USE_HW_LAYERS = false;
static final String LOG_TAG = "PullToRefresh";
public static final float DEFAULT_FRICTION = 2.0f;
public static final int DEFAULT_SMOOTH_SCROLL_DURATION_MS = 200;
public static final int DEFAULT_SMOOTH_SCROLL_LONG_DURATION_MS = 325;
static final int DEMO_SCROLL_INTERVAL = 225;
static final String STATE_STATE = "ptr_state";
static final String STATE_MODE = "ptr_mode";
static final String STATE_CURRENT_MODE = "ptr_current_mode";
static final String STATE_SCROLLING_REFRESHING_ENABLED = "ptr_disable_scrolling";
static final String STATE_SHOW_REFRESHING_VIEW = "ptr_show_refreshing_view";
static final String STATE_SUPER = "ptr_super";
static final int REFRESHABLEVIEW_REFRESHING_BAR_VIEW_WHILE_REFRESHING_DURATION = 100;
static final int REFRESHABLE_VIEW_HIDE_WHILE_REFRESHING_DURATION = 500;
static final int GOOGLE_STYLE_VIEW_APPEAREANCE_DURATION = 200;
static final int DFEAULT_REFRESHABLEVIEW_REFRESHING_BAR_SIZE = ViewGroup.LayoutParams.WRAP_CONTENT;
static final int LAYER_TYPE_HARDWARE = 2;
static final int LAYER_TYPE_NONE = 0;
// ===========================================================
// Fields
// ===========================================================
private int mTouchSlop;
private float mLastMotionX, mLastMotionY;
private float mInitialMotionX, mInitialMotionY;
// needed properties while scrolling
private float mFriction;
private int mSmoothScrollDurationMs = 200;
private int mSmoothScrollLongDurationMs = 325;
private boolean mIsBeingDragged = false;
private State mState = State.RESET;
private Mode mMode = Mode.getDefault();
private Mode mCurrentMode;
T mRefreshableView;
private FrameLayout mRefreshableViewWrapper;
private boolean mShowViewWhileRefreshing = true;
private boolean mScrollingWhileRefreshingEnabled = false;
private boolean mFilterTouchEvents = true;
private boolean mOverScrollEnabled = true;
private boolean mLayoutVisibilityChangesEnabled = true;
private Interpolator mScrollAnimationInterpolator;
private Class<? extends LoadingLayout> mLoadingLayoutClazz = null;
private LoadingLayout mHeaderLayout;
private LoadingLayout mFooterLayout;
/**
* Top DecorView for containing google style pull to refresh
*/
private FrameLayout mTopActionbarLayout;
/**
* Flag whether {@link #onAttachedToWindow()} event has been called
*/
private boolean mWindowAttached = false;
/**
* View Layout being shown over ActionBar
*/
private GoogleStyleViewLayout mGoogleStyleViewLayout;
/**
* Progress Bar being shown over ActionBar
*/
private GoogleStyleProgressLayout mGoogleStyleProgressLayout;
/**
* Progress bar ratating on center while Refreshing
*/
private ProgressBar mRefreshableViewProgressBar;
private OnRefreshListener<T> mOnRefreshListener;
private OnRefreshListener2<T> mOnRefreshListener2;
private OnPullEventListener<T> mOnPullEventListener;
private SmoothScrollRunnable mCurrentSmoothScrollRunnable;
private int mStatusBarHeight;
/**
* Current actionbar size
*/
private int mActionBarHeight;
/**
* Flag whether {@link #onRefreshing(boolean)} has been called
*/
private boolean mRefreshing;
/**
* Flag whether Google style view layout appearance animation will be shown
*/
private boolean mShowGoogleStyleViewAnimationEnabled = true;
/**
* Duration of Google style view layout appearance animation
*/
private int mShowGoogleStyleViewAnimationDuration = GOOGLE_STYLE_VIEW_APPEAREANCE_DURATION;
/**
* Flag whether {@code mRefreshaleView} will be hidden while refreshing
*/
private boolean mRefeshableViewHideWhileRefreshingEnabled = true;
/**
* {@code mRefreshableView}'s fade-out Duration
*/
private int mRefeshableViewHideWhileRefreshingDuration = REFRESHABLE_VIEW_HIDE_WHILE_REFRESHING_DURATION;
/**
* Flag whether some {@code ProgressBar} will be shown while refreshing
*/
private boolean mRefeshableViewRefreshingBarViewWhileRefreshingEnabled = true;
/**
* {@code mRefreshableViewRefreshingBar}'s fade-in Duration
*/
private int mRefeshableViewRefreshingBarViewWhileRefreshingDuration = REFRESHABLEVIEW_REFRESHING_BAR_VIEW_WHILE_REFRESHING_DURATION;
/**
* Width of {@code mRefreshableViewRefreshingBar}
*/
private int mRefeshableViewRefreshingBarWidth = DFEAULT_REFRESHABLEVIEW_REFRESHING_BAR_SIZE;
/**
* Height of {@code mRefreshableViewRefreshingBar}
*/
private int mRefeshableViewRefreshingBarHeight = DFEAULT_REFRESHABLEVIEW_REFRESHING_BAR_SIZE;
/**
* Flag whether Google style view layout's size is set to ActionBar's size
* (Don't set to false as possible, it's hard to control height if this flag is false)
*/
private boolean mSetGoogleViewLayoutSizeToActionbarHeight = true;
private int mYPositionOfGoogleStyleViewLayout;
private int mYPositionOfGoogleStyleProgressLayout;
// ===========================================================
// Constructors
// ===========================================================
public PullToRefreshBase(Context context) {
super(context);
init(context, null);
}
public PullToRefreshBase(Context context, AttributeSet attrs) {
super(context, attrs);
init(context, attrs);
}
public PullToRefreshBase(Context context, Mode mode) {
super(context);
mMode = mode;
init(context, null);
}
public PullToRefreshBase(Context context, Mode mode, Class<? extends LoadingLayout> loadingLayoutClazz) {
super(context);
mMode = mode;
mLoadingLayoutClazz = loadingLayoutClazz;
init(context, null);
}
@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
if (DEBUG) {
Log.d(LOG_TAG, "addView: " + child.getClass().getSimpleName());
}
final T refreshableView = getRefreshableView();
if (refreshableView instanceof ViewGroup) {
((ViewGroup) refreshableView).addView(child, index, params);
} else {
throw new UnsupportedOperationException("Refreshable View is not a ViewGroup so can't addView");
}
}
@Deprecated
@Override
public final boolean demo() {
if (mMode.showHeaderLoadingLayout() && isReadyForPullStart()) {
smoothScrollToAndBack(-getHeaderSize() * 2);
return true;
} else if (mMode.showFooterLoadingLayout() && isReadyForPullEnd()) {
smoothScrollToAndBack(getFooterSize() * 2);
return true;
}
return false;
}
@Override
public final Mode getCurrentMode() {
return mCurrentMode;
}
@Override
public final boolean getFilterTouchEvents() {
return mFilterTouchEvents;
}
@Override
public final ILoadingLayout getLoadingLayoutProxy() {
return getLoadingLayoutProxy(true, true);
}
@Override
public final ILoadingLayout getLoadingLayoutProxy(boolean includeStart, boolean includeEnd) {
return createLoadingLayoutProxy(includeStart, includeEnd);
}
@Override
public final Mode getMode() {
return mMode;
}
@Override
public final T getRefreshableView() {
return mRefreshableView;
}
@Override
public final boolean getShowViewWhileRefreshing() {
return mShowViewWhileRefreshing;
}
@Override
public final State getState() {
return mState;
}
/**
* @deprecated See {@link #isScrollingWhileRefreshingEnabled()}.
*/
public final boolean isDisableScrollingWhileRefreshing() {
return !isScrollingWhileRefreshingEnabled();
}
@Override
public final boolean isPullToRefreshEnabled() {
return mMode.permitsPullToRefresh();
}
@Override
public final boolean isPullToRefreshOverScrollEnabled() {
return VERSION.SDK_INT >= VERSION_CODES.GINGERBREAD && mOverScrollEnabled
&& OverscrollHelper.isAndroidOverScrollEnabled(mRefreshableView);
}
@Override
public final boolean isRefreshing() {
return mState == State.REFRESHING || mState == State.MANUAL_REFRESHING;
}
@Override
public final boolean isScrollingWhileRefreshingEnabled() {
return mScrollingWhileRefreshingEnabled;
}
@Override
public final boolean onInterceptTouchEvent(MotionEvent event) {
if (!isPullToRefreshEnabled()) {
return false;
}
final int action = event.getAction();
if (action == MotionEvent.ACTION_CANCEL || action == MotionEvent.ACTION_UP) {
mIsBeingDragged = false;
return false;
}
if (action != MotionEvent.ACTION_DOWN && mIsBeingDragged) {
return true;
}
switch (action) {
case MotionEvent.ACTION_MOVE: {
// If we're refreshing, and the flag is set. Eat all MOVE events
if (!mScrollingWhileRefreshingEnabled && isRefreshing()) {
return true;
}
if (isReadyForPull()) {
final float y = event.getY(), x = event.getX();
final float diff, oppositeDiff, absDiff;
// We need to use the correct values, based on scroll
// direction
switch (getFilteredPullToRefreshScrollDirection()) {
case HORIZONTAL:
diff = x - mLastMotionX;
oppositeDiff = y - mLastMotionY;
break;
case VERTICAL:
default:
diff = y - mLastMotionY;
oppositeDiff = x - mLastMotionX;
break;
}
absDiff = Math.abs(diff);
if (absDiff > mTouchSlop && (!mFilterTouchEvents || absDiff > Math.abs(oppositeDiff))) {
if ((mMode.showHeaderLoadingLayout() || mMode.showGoogleStyle()) && diff >= 1f && isReadyForPullStart()) {
mLastMotionY = y;
mLastMotionX = x;
mIsBeingDragged = true;
if (mMode == Mode.BOTH) {
mCurrentMode = Mode.PULL_FROM_START;
}
} else if (mMode.showFooterLoadingLayout() && diff <= -1f && isReadyForPullEnd()) {
mLastMotionY = y;
mLastMotionX = x;
mIsBeingDragged = true;
if (mMode == Mode.BOTH) {
mCurrentMode = Mode.PULL_FROM_END;
}
}
}
}
break;
}
case MotionEvent.ACTION_DOWN: {
if (isReadyForPull()) {
mLastMotionY = mInitialMotionY = event.getY();
mLastMotionX = mInitialMotionX = event.getX();
mIsBeingDragged = false;
}
break;
}
}
return mIsBeingDragged;
}
@Override
public final void onRefreshComplete() {
if (isRefreshing()) {
setState(State.RESET);
}
}
@Override
public final boolean onTouchEvent(MotionEvent event) {
if (!isPullToRefreshEnabled()) {
return false;
}
// If we're refreshing, and the flag is set. Eat the event
if (!mScrollingWhileRefreshingEnabled && isRefreshing()) {
return true;
}
if (event.getAction() == MotionEvent.ACTION_DOWN && event.getEdgeFlags() != 0) {
return false;
}
switch (event.getAction()) {
case MotionEvent.ACTION_MOVE: {
if (mIsBeingDragged) {
mLastMotionY = event.getY();
mLastMotionX = event.getX();
pullEvent();
return true;
}
break;
}
case MotionEvent.ACTION_DOWN: {
if (isReadyForPull()) {
mLastMotionY = mInitialMotionY = event.getY();
mLastMotionX = mInitialMotionX = event.getX();
return true;
}
break;
}
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP: {
if (mIsBeingDragged) {
mIsBeingDragged = false;
if (mState == State.RELEASE_TO_REFRESH
&& (null != mOnRefreshListener || null != mOnRefreshListener2)) {
setState(State.REFRESHING, true);
return true;
}
// If we're already refreshing, just scroll back to the top
if (isRefreshing()) {
smoothScrollTo(0);
return true;
}
// If we haven't returned by here, then we're not in a state
// to pull, so just reset
setState(State.RESET);
return true;
}
break;
}
}
return false;
}
/**
* Set new friction
* @param friction New friction value. Must be float. The default value is {@value #DEFAULT_FRICTION}.
*/
public final void setFriction(float friction) {
this.mFriction = friction;
}
/**
* Set new smooth scroll duration
* @param smoothScrollDurationMs Milliseconds. The default value is {@value #DEFAULT_SMOOTH_SCROLL_DURATION_MS}.
*/
public final void setSmoothScrollDuration(int smoothScrollDurationMs) {
this.mSmoothScrollDurationMs = smoothScrollDurationMs;
}
/**
* Set new smooth scroll <b>longer</b> duration. <br /> This duration is only used by calling {@link #smoothScrollToLonger(int)}.
* @param smoothScrollLongDurationMs Milliseconds. The default value is {@value #DEFAULT_SMOOTH_SCROLL_LONG_DURATION_MS}.
*/
public final void setSmoothScrollLongDuration(int smoothScrollLongDurationMs) {
this.mSmoothScrollLongDurationMs = smoothScrollLongDurationMs;
}
/**
*
*/
public final void setScrollingWhileRefreshingEnabled(boolean allowScrollingWhileRefreshing) {
mScrollingWhileRefreshingEnabled = allowScrollingWhileRefreshing;
}
/**
* @deprecated See {@link #setScrollingWhileRefreshingEnabled(boolean)}
*/
public void setDisableScrollingWhileRefreshing(boolean disableScrollingWhileRefreshing) {
setScrollingWhileRefreshingEnabled(!disableScrollingWhileRefreshing);
}
@Override
public final void setFilterTouchEvents(boolean filterEvents) {
mFilterTouchEvents = filterEvents;
}
/**
* @deprecated You should now call this method on the result of
* {@link #getLoadingLayoutProxy()}.
*/
public void setLastUpdatedLabel(CharSequence label) {
getLoadingLayoutProxy().setLastUpdatedLabel(label);
}
/**
* @deprecated You should now call this method on the result of
* {@link #getLoadingLayoutProxy()}.
*/
public void setLoadingDrawable(Drawable drawable) {
getLoadingLayoutProxy().setLoadingDrawable(drawable);
}
/**
* @deprecated You should now call this method on the result of
* {@link #getLoadingLayoutProxy(boolean, boolean)}.
*/
public void setLoadingDrawable(Drawable drawable, Mode mode) {
getLoadingLayoutProxy(mode.showHeaderLoadingLayout(), mode.showFooterLoadingLayout()).setLoadingDrawable(
drawable);
}
@Override
public void setLongClickable(boolean longClickable) {
getRefreshableView().setLongClickable(longClickable);
}
@Override
public final void setMode(Mode mode) {
if (mode != mMode) {
if (DEBUG) {
Log.d(LOG_TAG, "Setting mode to: " + mode);
}
mMode = mode;
updateUIForMode();
updateUIForGoogleStyleMode();
}
}
public void setOnPullEventListener(OnPullEventListener<T> listener) {
mOnPullEventListener = listener;
}
@Override
public final void setOnRefreshListener(OnRefreshListener<T> listener) {
mOnRefreshListener = listener;
mOnRefreshListener2 = null;
}
@Override
public final void setOnRefreshListener(OnRefreshListener2<T> listener) {
mOnRefreshListener2 = listener;
mOnRefreshListener = null;
}
/**
* @deprecated You should now call this method on the result of
* {@link #getLoadingLayoutProxy()}.
*/
public void setPullLabel(CharSequence pullLabel) {
getLoadingLayoutProxy().setPullLabel(pullLabel);
}
/**
* @deprecated You should now call this method on the result of
* {@link #getLoadingLayoutProxy(boolean, boolean)}.
*/
public void setPullLabel(CharSequence pullLabel, Mode mode) {
getLoadingLayoutProxy(mode.showHeaderLoadingLayout(), mode.showFooterLoadingLayout()).setPullLabel(pullLabel);
}
/**
* @param enable Whether Pull-To-Refresh should be used
* @deprecated This simple calls setMode with an appropriate mode based on
* the passed value.
*/
public final void setPullToRefreshEnabled(boolean enable) {
setMode(enable ? Mode.getDefault() : Mode.DISABLED);
}
@Override
public final void setPullToRefreshOverScrollEnabled(boolean enabled) {
mOverScrollEnabled = enabled;
}
@Override
public final void setRefreshing() {
setRefreshing(true);
}
@Override
public final void setRefreshing(boolean doScroll) {
if (!isRefreshing()) {
setState(State.MANUAL_REFRESHING, doScroll);
}
}
/**
* @deprecated You should now call this method on the result of
* {@link #getLoadingLayoutProxy()}.
*/
public void setRefreshingLabel(CharSequence refreshingLabel) {
getLoadingLayoutProxy().setRefreshingLabel(refreshingLabel);
}
/**
* @deprecated You should now call this method on the result of
* {@link #getLoadingLayoutProxy(boolean, boolean)}.
*/
public void setRefreshingLabel(CharSequence refreshingLabel, Mode mode) {
getLoadingLayoutProxy(mode.showHeaderLoadingLayout(), mode.showFooterLoadingLayout()).setRefreshingLabel(
refreshingLabel);
}
/**
* @deprecated You should now call this method on the result of
* {@link #getLoadingLayoutProxy()}.
*/
public void setReleaseLabel(CharSequence releaseLabel) {
setReleaseLabel(releaseLabel, Mode.BOTH);
}
/**
* @deprecated You should now call this method on the result of
* {@link #getLoadingLayoutProxy(boolean, boolean)}.
*/
public void setReleaseLabel(CharSequence releaseLabel, Mode mode) {
getLoadingLayoutProxy(mode.showHeaderLoadingLayout(), mode.showFooterLoadingLayout()).setReleaseLabel(
releaseLabel);
}
public void setScrollAnimationInterpolator(Interpolator interpolator) {
mScrollAnimationInterpolator = interpolator;
}
@Override
public final void setShowViewWhileRefreshing(boolean showView) {
mShowViewWhileRefreshing = showView;
}
/**
* @return Either {@link Orientation#VERTICAL} or
* {@link Orientation#HORIZONTAL} depending on the scroll direction.
*/
public abstract Orientation getPullToRefreshScrollDirection();
/**
* <p>
* Wrap {@link #getPullToRefreshScrollDirection()} method <br />
* Other methods Use this method instead of {@link #getPullToRefreshScrollDirection()} method, because an orientation must be VERTICAL when mode is google style
* </p>
* @return Oreintation.VERTICAL if mMode.showGoogleStyle() is true,<br />Return value of {@link #getPullToRefreshScrollDirection()} method if else
*/
public final Orientation getFilteredPullToRefreshScrollDirection() {
Orientation orientation = getPullToRefreshScrollDirection();
if (mMode.showGoogleStyle() ) {
orientation = Orientation.VERTICAL;
}
return orientation;
}
final void setState(State state, final boolean... params) {
mState = state;
if (DEBUG) {
Log.d(LOG_TAG, "State: " + mState.name());
}
switch (mState) {
case RESET:
onReset();
break;
case PULL_TO_REFRESH:
onPullToRefresh();
break;
case RELEASE_TO_REFRESH:
onReleaseToRefresh();
break;
case REFRESHING:
case MANUAL_REFRESHING:
onRefreshing(params[0]);
break;
case OVERSCROLLING:
// NO-OP
break;
}
// Call OnPullEventListener
if (null != mOnPullEventListener) {
mOnPullEventListener.onPullEvent(this, mState, mCurrentMode);
}
}
/**
* Used internally for adding view. Need because we override addView to
* pass-through to the Refreshable View
*/
protected final void addViewInternal(View child, int index, ViewGroup.LayoutParams params) {
super.addView(child, index, params);
}
/**
* Used internally for adding view. Need because we override addView to
* pass-through to the Refreshable View
*/
protected final void addViewInternal(View child, ViewGroup.LayoutParams params) {
super.addView(child, -1, params);
}
/**
* Create a new loading layout instance by using the class token {@link #mLoadingLayoutClazz}
* @param context
* @param mode
* @param attrs
* @return Loading layout instance which was created by using the class token {@link #mLoadingLayoutClazz}
*/
protected LoadingLayout createLoadingLayout(Context context, Mode mode, TypedArray attrs) {
return LoadingLayoutFactory.createLoadingLayout(mLoadingLayoutClazz, context, mode, getFilteredPullToRefreshScrollDirection(), attrs);
}
/**
* Create a new google style view layout instance by using the class token
* @param layoutCode Google style view layout code to be converted to some class token
* @param context
* @param mode
* @param attrs
* @return Google style <b>view</b> layout instance which was created by using the class token
*/
private GoogleStyleViewLayout createGoogleStyleViewLayout(
String layoutCode, Context context, TypedArray a) {
Class<? extends GoogleStyleViewLayout> clazz = GoogleStyleViewLayoutFactory.createGoogleStyleViewLayoutClazzByLayoutCode(layoutCode);
return GoogleStyleViewLayoutFactory.createGoogleStyleViewLayout(clazz, context, a);
}
/**
* Create a new google style progress layout instance by using the class token
* @param layoutCode google style progress layout code to be converted to some class token
* @param context
* @param mode
* @param attrs
* @return Google style <b>progress</b> layout instance which was created by using the class token
*/
private GoogleStyleProgressLayout createGoogleStyleProgressLayout(
String layoutCode, Context context, TypedArray a) {
Class<? extends GoogleStyleProgressLayout> clazz = GoogleStyleProgressLayoutFactory.createGoogleStyleProgressLayoutClazzByLayoutCode(layoutCode);
return GoogleStyleProgressLayoutFactory.createGoogleStyleProgressLayout(clazz, context, a);
}
/**
* Used internally for {@link #getLoadingLayoutProxy(boolean, boolean)}.
* Allows derivative classes to include any extra LoadingLayouts.
*/
protected LoadingLayoutProxy createLoadingLayoutProxy(final boolean includeStart, final boolean includeEnd) {
LoadingLayoutProxy proxy = new LoadingLayoutProxy();
if (includeStart && mMode.showHeaderLoadingLayout()) {
proxy.addLayout(mHeaderLayout);
}
if (includeEnd && mMode.showFooterLoadingLayout()) {
proxy.addLayout(mFooterLayout);
}
return proxy;
}
/**
* This is implemented by derived classes to return the created View. If you
* need to use a custom View (such as a custom ListView), override this
* method and return an instance of your custom class.
* <p/>
* Be sure to set the ID of the view in this method, especially if you're
* using a ListActivity or ListFragment.
*
* @param context Context to create view with
* @param attrs AttributeSet from wrapped class. Means that anything you
* include in the XML layout declaration will be routed to the
* created View
* @return New instance of the Refreshable View
*/
protected abstract T createRefreshableView(Context context, AttributeSet attrs);
protected final void disableLoadingLayoutVisibilityChanges() {
mLayoutVisibilityChangesEnabled = false;
}
protected final LoadingLayout getFooterLayout() {
return mFooterLayout;
}
protected final int getFooterSize() {
return mFooterLayout.getContentSize();
}
protected final LoadingLayout getHeaderLayout() {
return mHeaderLayout;
}
protected final int getHeaderSize() {
return mHeaderLayout.getContentSize();
}
protected final int getGoogleStyleViewSize() {
return mGoogleStyleViewLayout.getContentSize();
}
protected int getPullToRefreshScrollDuration() {
return mSmoothScrollDurationMs;
}
protected int getPullToRefreshScrollDurationLonger() {
return mSmoothScrollLongDurationMs;
}
protected FrameLayout getRefreshableViewWrapper() {
return mRefreshableViewWrapper;
}
/**
* Allows Derivative classes to handle the XML Attrs without creating a
* TypedArray themsevles
*
* @param a - TypedArray of PullToRefresh Attributes
*/
protected void handleStyledAttributes(TypedArray a) {
}
/**
* Implemented by derived class to return whether the View is in a state
* where the user can Pull to Refresh by scrolling from the end.
*
* @return true if the View is currently in the correct state (for example,
* bottom of a ListView)
*/
protected abstract boolean isReadyForPullEnd();
/**
* Implemented by derived class to return whether the View is in a state
* where the user can Pull to Refresh by scrolling from the start.
*
* @return true if the View is currently the correct state (for example, top
* of a ListView)
*/
protected abstract boolean isReadyForPullStart();
/**
* Called by {@link #onRestoreInstanceState(Parcelable)} so that derivative
* classes can handle their saved instance state.
*
* @param savedInstanceState - Bundle which contains saved instance state.
*/
protected void onPtrRestoreInstanceState(Bundle savedInstanceState) {
}
/**
* Called by {@link #onSaveInstanceState()} so that derivative classes can
* save their instance state.
*
* @param saveState - Bundle to be updated with saved state.
*/
protected void onPtrSaveInstanceState(Bundle saveState) {
}
/**
* Called when the UI has been to be updated to be in the
* {@link State#PULL_TO_REFRESH} state.
*/
protected void onPullToRefresh() {
switch (mCurrentMode) {
case PULL_FROM_END:
mFooterLayout.pullToRefresh();
break;
case GOOGLE_STYLE:
showViewTopLayout();
mGoogleStyleViewLayout.pullToRefresh();
mGoogleStyleProgressLayout.pullToRefresh();
break;
case PULL_FROM_START:
mHeaderLayout.pullToRefresh();
break;
default:
// NO-OP
break;
}
}
/**
* Called when the UI has been to be updated to be in the
* {@link State#REFRESHING} or {@link State#MANUAL_REFRESHING} state.
*
* @param doScroll - Whether the UI should scroll for this event.
*/
protected void onRefreshing(final boolean doScroll) {
// Set the flag as below for fade-in animation of mRefreshableView when releasing
mRefreshing = true;
if (mMode.showHeaderLoadingLayout()) {
mHeaderLayout.refreshing();
}
if (mMode.showFooterLoadingLayout()) {
mFooterLayout.refreshing();
}
if (mMode.showGoogleStyle()) {
// Fade-out mRefreshableView
if ( mRefeshableViewHideWhileRefreshingEnabled == true ) {
AlphaAnimator.fadeout(mRefreshableView, mRefeshableViewHideWhileRefreshingDuration);
}
// Fade-in refreshing bar on center
if (mRefeshableViewRefreshingBarViewWhileRefreshingEnabled == true ) {
mRefreshableViewProgressBar.setVisibility(View.VISIBLE);
AlphaAnimator.fadein(mRefreshableViewProgressBar, mRefeshableViewRefreshingBarViewWhileRefreshingDuration);
}
mGoogleStyleViewLayout.refreshing();
mGoogleStyleProgressLayout.refreshing();
}
if (doScroll) {
if (mShowViewWhileRefreshing) {
// Call Refresh Listener when the Scroll has finished
OnSmoothScrollFinishedListener listener = new OnSmoothScrollFinishedListener() {
@Override
public void onSmoothScrollFinished() {
callRefreshListener();
}
};
switch (mCurrentMode) {
case MANUAL_REFRESH_ONLY:
case PULL_FROM_END:
smoothScrollTo(getFooterSize(), listener);
break;
default:
case PULL_FROM_START:
smoothScrollTo(-getHeaderSize(), listener);
break;
}
} else {
smoothScrollTo(0);
}
} else {
// We're not scrolling, so just call Refresh Listener now
callRefreshListener();
}
}
/**
* Called when the UI has been to be updated to be in the
* {@link State#RELEASE_TO_REFRESH} state.
*/
protected void onReleaseToRefresh() {
switch (mCurrentMode) {
case PULL_FROM_END:
mFooterLayout.releaseToRefresh();
break;
case GOOGLE_STYLE:
mGoogleStyleViewLayout.releaseToRefresh();
mGoogleStyleProgressLayout.releaseToRefresh();
break;
case PULL_FROM_START:
mHeaderLayout.releaseToRefresh();
break;
default:
// NO-OP
break;
}
}
/**
* Called when the UI has been to be updated to be in the
* {@link State#RESET} state.
*/
protected void onReset() {
mIsBeingDragged = false;
mLayoutVisibilityChangesEnabled = true;
// Always reset both layouts, just in case...
mHeaderLayout.reset();
mFooterLayout.reset();
if (mMode.showGoogleStyle()) {
mGoogleStyleViewLayout.reset();
hideViewTopLayout();
mGoogleStyleProgressLayout.reset();
// Fade-in mRefreshableView
if ( mRefreshing == true && mRefeshableViewHideWhileRefreshingEnabled == true ) {
mRefreshableView.clearAnimation();
AlphaAnimator.fadein(mRefreshableView, mRefeshableViewHideWhileRefreshingDuration);
}
// Fade-out refreshing bar on center
if (mRefeshableViewRefreshingBarViewWhileRefreshingEnabled == true ) {
AlphaAnimator.fadeout(mRefreshableViewProgressBar, mRefeshableViewRefreshingBarViewWhileRefreshingDuration, new AnimationListener(){
@Override
public void onAnimationEnd(Animation animation) {
mRefreshableViewProgressBar.setVisibility(View.INVISIBLE);
}
@Override
public void onAnimationRepeat(Animation animation) {
// do nothing
}