Java tutorial
/* * Copyright (C) 2013 47 Degrees, LLC * http://47deg.com * hello@47deg.com * * 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 flaychat.cn.flychat.chat.swipelistview; import android.content.Context; import android.content.res.TypedArray; import android.database.DataSetObserver; import android.support.v4.view.MotionEventCompat; import android.support.v4.view.ViewConfigurationCompat; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.ViewConfiguration; import android.widget.ListAdapter; import android.widget.ListView; import flaychat.cn.flychat.R; /** * ListView subclass that provides the swipe functionality */ public class SwipeListView extends ListView { /** * Used when user want change swipe list mode on some rows */ public final static int SWIPE_MODE_DEFAULT = -1; /** * Disables all swipes */ public final static int SWIPE_MODE_NONE = 0; /** * Enables both left and right swipe */ public final static int SWIPE_MODE_BOTH = 1; /** * Enables right swipe */ public final static int SWIPE_MODE_RIGHT = 2; /** * Enables left swipe */ public final static int SWIPE_MODE_LEFT = 3; /** * Binds the swipe gesture to reveal a view behind the row (Drawer style) */ public final static int SWIPE_ACTION_REVEAL = 0; /** * Dismisses the cell when swiped over */ public final static int SWIPE_ACTION_DISMISS = 1; /** * Marks the cell as checked when swiped and release */ public final static int SWIPE_ACTION_CHECK = 2; /** * No action when swiped */ public final static int SWIPE_ACTION_NONE = 3; /** * Default ids for front view */ public final static String SWIPE_DEFAULT_FRONT_VIEW = "swipelist_frontview"; /** * Default id for back view */ public final static String SWIPE_DEFAULT_BACK_VIEW = "swipelist_backview"; /** * Indicates no movement */ private final static int TOUCH_STATE_REST = 0; /** * State scrolling x position */ private final static int TOUCH_STATE_SCROLLING_X = 1; /** * State scrolling y position */ private final static int TOUCH_STATE_SCROLLING_Y = 2; private int touchState = TOUCH_STATE_REST; private float lastMotionX; private float lastMotionY; private int touchSlop; int swipeFrontView = 0; int swipeBackView = 0; /** * Internal listener for common swipe events */ private BaseSwipeListViewListener swipeListViewListener; /** * Internal touch listener */ private SwipeListViewTouchListener touchListener; /** * If you create a View programmatically you need send back and front identifier * @param context Context * @param swipeBackView Back Identifier * @param swipeFrontView Front Identifier */ public SwipeListView(Context context, int swipeBackView, int swipeFrontView) { super(context); this.swipeFrontView = swipeFrontView; this.swipeBackView = swipeBackView; init(null); } /** * @see android.widget.ListView#ListView(android.content.Context, android.util.AttributeSet) */ public SwipeListView(Context context, AttributeSet attrs) { super(context, attrs); init(attrs); } /** * @see android.widget.ListView#ListView(android.content.Context, android.util.AttributeSet, int) */ public SwipeListView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(attrs); } /** * Init ListView * * @param attrs AttributeSet */ private void init(AttributeSet attrs) { int swipeMode = SWIPE_MODE_BOTH; boolean swipeOpenOnLongPress = true; boolean swipeCloseAllItemsWhenMoveList = true; long swipeAnimationTime = 0; float swipeOffsetLeft = 0; float swipeOffsetRight = 0; int swipeActionLeft = SWIPE_ACTION_REVEAL; int swipeActionRight = SWIPE_ACTION_REVEAL; if (attrs != null) { TypedArray styled = getContext().obtainStyledAttributes(attrs, R.styleable.SwipeListView); swipeMode = styled.getInt(R.styleable.SwipeListView_swipeMode, SWIPE_MODE_BOTH); swipeActionLeft = styled.getInt(R.styleable.SwipeListView_swipeActionLeft, SWIPE_ACTION_REVEAL); swipeActionRight = styled.getInt(R.styleable.SwipeListView_swipeActionRight, SWIPE_ACTION_REVEAL); swipeOffsetLeft = styled.getDimension(R.styleable.SwipeListView_swipeOffsetLeft, 0); swipeOffsetRight = styled.getDimension(R.styleable.SwipeListView_swipeOffsetRight, 0); swipeOpenOnLongPress = styled.getBoolean(R.styleable.SwipeListView_swipeOpenOnLongPress, true); swipeAnimationTime = styled.getInteger(R.styleable.SwipeListView_swipeAnimationTime, 0); swipeCloseAllItemsWhenMoveList = styled .getBoolean(R.styleable.SwipeListView_swipeCloseAllItemsWhenMoveList, true); swipeFrontView = styled.getResourceId(R.styleable.SwipeListView_swipeFrontView, 0); swipeBackView = styled.getResourceId(R.styleable.SwipeListView_swipeBackView, 0); } if (swipeFrontView == 0 || swipeBackView == 0) { swipeFrontView = getContext().getResources().getIdentifier(SWIPE_DEFAULT_FRONT_VIEW, "id", getContext().getPackageName()); swipeBackView = getContext().getResources().getIdentifier(SWIPE_DEFAULT_BACK_VIEW, "id", getContext().getPackageName()); if (swipeFrontView == 0 || swipeBackView == 0) { throw new RuntimeException(String.format( "You forgot the attributes swipeFrontView or swipeBackView. You can add this attributes or use '%s' and '%s' identifiers", SWIPE_DEFAULT_FRONT_VIEW, SWIPE_DEFAULT_BACK_VIEW)); } } final ViewConfiguration configuration = ViewConfiguration.get(getContext()); touchSlop = ViewConfigurationCompat.getScaledPagingTouchSlop(configuration); touchListener = new SwipeListViewTouchListener(this, swipeFrontView, swipeBackView); if (swipeAnimationTime > 0) { touchListener.setAnimationTime(swipeAnimationTime); } touchListener.setRightOffset(swipeOffsetRight); touchListener.setLeftOffset(swipeOffsetLeft); touchListener.setSwipeActionLeft(swipeActionLeft); touchListener.setSwipeActionRight(swipeActionRight); touchListener.setSwipeMode(swipeMode); touchListener.setSwipeClosesAllItemsWhenListMoves(swipeCloseAllItemsWhenMoveList); touchListener.setSwipeOpenOnLongPress(swipeOpenOnLongPress); setOnTouchListener(touchListener); setOnScrollListener(touchListener.makeScrollListener()); } /** * @see android.widget.ListView#setAdapter(android.widget.ListAdapter) */ @Override public void setAdapter(ListAdapter adapter) { super.setAdapter(adapter); touchListener.resetItems(); adapter.registerDataSetObserver(new DataSetObserver() { @Override public void onChanged() { super.onChanged(); onListChanged(); touchListener.resetItems(); } }); } /** * Open ListView's item * * @param position Position that you want open */ public void openAnimate(int position) { touchListener.openAnimate(position); } /** * Close ListView's item * * @param position Position that you want open */ public void closeAnimate(int position) { touchListener.closeAnimate(position); } /** * Notifies onDismiss * * @param reverseSortedPositions All dismissed positions */ protected void onDismiss(int[] reverseSortedPositions) { if (swipeListViewListener != null) { swipeListViewListener.onDismiss(reverseSortedPositions); } } /** * Start open item * @param position list item * @param action current action * @param right to right */ protected void onStartOpen(int position, int action, boolean right) { if (swipeListViewListener != null) { swipeListViewListener.onStartOpen(position, action, right); } } /** * Start close item * @param position list item * @param right */ protected void onStartClose(int position, boolean right) { if (swipeListViewListener != null) { swipeListViewListener.onStartClose(position, right); } } /** * Notifies onClickFrontView * * @param position item clicked */ protected void onClickFrontView(int position) { if (swipeListViewListener != null) { swipeListViewListener.onClickFrontView(position); } } /** * Notifies onClickBackView * * @param position back item clicked */ protected void onClickBackView(int position) { if (swipeListViewListener != null) { swipeListViewListener.onClickBackView(position); } } /** * Notifies onOpened * * @param position Item opened * @param toRight If should be opened toward the right */ protected void onOpened(int position, boolean toRight) { if (swipeListViewListener != null) { swipeListViewListener.onOpened(position, toRight); } } /** * Notifies onClosed * * @param position Item closed * @param fromRight If open from right */ protected void onClosed(int position, boolean fromRight) { if (swipeListViewListener != null) { swipeListViewListener.onClosed(position, fromRight); } } /** * Notifies onListChanged */ protected void onListChanged() { if (swipeListViewListener != null) { swipeListViewListener.onListChanged(); } } /** * Notifies onMove * * @param position Item moving * @param x Current position */ protected void onMove(int position, float x) { if (swipeListViewListener != null) { swipeListViewListener.onMove(position, x); } } protected int changeSwipeMode(int position) { if (swipeListViewListener != null) { return swipeListViewListener.onChangeSwipeMode(position); } return SWIPE_MODE_DEFAULT; } /** * Sets the Listener * * @param swipeListViewListener Listener */ public void setSwipeListViewListener(BaseSwipeListViewListener swipeListViewListener) { this.swipeListViewListener = swipeListViewListener; } /** * Resets scrolling */ public void resetScrolling() { touchState = TOUCH_STATE_REST; } /** * Set offset on right * * @param offsetRight Offset */ public void setOffsetRight(float offsetRight) { touchListener.setRightOffset(offsetRight); } /** * Set offset on left * * @param offsetLeft Offset */ public void setOffsetLeft(float offsetLeft) { touchListener.setLeftOffset(offsetLeft); } /** * Set if all items opened will be closed when the user moves the ListView * * @param swipeCloseAllItemsWhenMoveList */ public void setSwipeCloseAllItemsWhenMoveList(boolean swipeCloseAllItemsWhenMoveList) { touchListener.setSwipeClosesAllItemsWhenListMoves(swipeCloseAllItemsWhenMoveList); } /** * Sets if the user can open an item with long pressing on cell * * @param swipeOpenOnLongPress */ public void setSwipeOpenOnLongPress(boolean swipeOpenOnLongPress) { touchListener.setSwipeOpenOnLongPress(swipeOpenOnLongPress); } /** * Set swipe mode * * @param swipeMode */ public void setSwipeMode(int swipeMode) { touchListener.setSwipeMode(swipeMode); } /** * Return action on left * * @return Action */ public int getSwipeActionLeft() { return touchListener.getSwipeActionLeft(); } /** * Set action on left * * @param swipeActionLeft Action */ public void setSwipeActionLeft(int swipeActionLeft) { touchListener.setSwipeActionLeft(swipeActionLeft); } /** * Return action on right * * @return Action */ public int getSwipeActionRight() { return touchListener.getSwipeActionRight(); } /** * Set action on right * * @param swipeActionRight Action */ public void setSwipeActionRight(int swipeActionRight) { touchListener.setSwipeActionRight(swipeActionRight); } /** * Sets animation time when user drops cell * * @param animationTime milliseconds */ public void setAnimationTime(long animationTime) { touchListener.setAnimationTime(animationTime); } /** * @see android.widget.ListView#onInterceptTouchEvent(android.view.MotionEvent) */ @Override public boolean onInterceptTouchEvent(MotionEvent ev) { int action = MotionEventCompat.getActionMasked(ev); final float x = ev.getX(); final float y = ev.getY(); if (touchState == TOUCH_STATE_SCROLLING_X) { return touchListener.onTouch(this, ev); } switch (action) { case MotionEvent.ACTION_MOVE: checkInMoving(x, y); return touchState == TOUCH_STATE_SCROLLING_Y; case MotionEvent.ACTION_DOWN: touchListener.onTouch(this, ev); touchState = TOUCH_STATE_REST; lastMotionX = x; lastMotionY = y; return false; case MotionEvent.ACTION_CANCEL: touchState = TOUCH_STATE_REST; break; case MotionEvent.ACTION_UP: touchListener.onTouch(this, ev); return touchState == TOUCH_STATE_SCROLLING_Y; default: break; } return super.onInterceptTouchEvent(ev); } /** * Check if the user is moving the cell * * @param x Position X * @param y Position Y */ private void checkInMoving(float x, float y) { final int xDiff = (int) Math.abs(x - lastMotionX); final int yDiff = (int) Math.abs(y - lastMotionY); final int touchSlop = this.touchSlop; boolean xMoved = xDiff > touchSlop; boolean yMoved = yDiff > touchSlop; if (xMoved) { touchState = TOUCH_STATE_SCROLLING_X; lastMotionX = x; lastMotionY = y; } if (yMoved) { touchState = TOUCH_STATE_SCROLLING_Y; lastMotionX = x; lastMotionY = y; } } /** * Close all opened items */ public void closeOpenedItems() { touchListener.closeOpenedItems(); } }