Android对SlidingDraw组件修改

1. 引言

 

    在Android中，对SlidingDraw组件进行修改，将SlidingDraw组件的把手（手柄）改成左右两个Button，单击或拖动第一个Button响应SlidingDraw所有默认动作，第二个Button也随第一个Button动而动，单击第二个Button,可以启动一个Activity或弹出Dialog,第二个Button不响应SlidingDraw的任何默认动作。

 

2. 效果图：

 

    (1) 效果图１：

         

    (2) 效果图2:

         

3. 功能实现

 

    (1) 主布局(main.xml)实现：<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"xmlns:flyfot = "http://schemas.android.com/apk/res/com.focus.fishme" android:layout_width = "fill_parent" android:layout_height = "fill_parent" ><com.focus.fishme.FishMeSlidingDrawerandroid:id = "@+id/slidingDrawer"android:layout_width = "fill_parent"android:layout_height = "fill_parent"flyfot:handle = "@+id/dragger"flyfot:content = "@+id/content"><LinearLayoutandroid:id = "@+id/dragger" android:layout_width = "wrap_content"android:layout_height = "wrap_content"><Button android:id = "@+id/mainButton" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:text = "DRAWER1" android:clickable = "false" /> <Button android:id = "@+id/phoneButton" android:layout_width = "wrap_content" android:layout_height = "wrap_content" android:text = "DRAWER2" /></LinearLayout> <LinearLayoutandroid:id = "@+id/content"android:layout_width = "fill_parent"android:layout_height = "fill_parent"android:background = "#00FF00"></LinearLayout> </com.focus.fishme.FishMeSlidingDrawer></LinearLayout>

 

    (1) 主Activity实现：package com.focus.fishme;import com.focus.fishme.FishMeSlidingDrawer.OnDrawerCloseListener;import com.focus.fishme.FishMeSlidingDrawer.OnDrawerOpenListener;import android.app.Activity;import android.os.Bundle;import android.view.Window;public class SlidingDrawerActivity extends Activity { private FishMeSlidingDrawer slidingDrawer; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); setProgressBarIndeterminateVisibility(true); setContentView(R.layout.main); slidingDrawer = (FishMeSlidingDrawer) findViewById(R.id.slidingDrawer); slidingDrawer.setOnDrawerOpenListener(new OnDrawerOpenListener() {public void onDrawerOpened() {}}); slidingDrawer.setOnDrawerCloseListener(new OnDrawerCloseListener() {public void onDrawerClosed() {} }); }} 

 

    (2) SlidingDraw修改实现：package com.focus.fishme;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Rect;import android.os.Handler;import android.os.Message;import android.os.SystemClock;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.SoundEffectConstants;import android.view.VelocityTracker;import android.view.View;import android.view.ViewGroup;import android.view.accessibility.AccessibilityEvent;import android.widget.Button;public class FishMeSlidingDrawer extends ViewGroup {public static final int ORIENTATION_HORIZONTAL = 0; public static final int ORIENTATION_VERTICAL = 1; private static final int TAP_THRESHOLD = 6; private static final float MAXIMUM_TAP_VELOCITY = 100.0f; private static final float MAXIMUM_MINOR_VELOCITY = 150.0f; private static final float MAXIMUM_MAJOR_VELOCITY = 200.0f; private static final float MAXIMUM_ACCELERATION = 2000.0f; private static final int VELOCITY_UNITS = 1000; private static final int MSG_ANIMATE = 1000; private static final int ANIMATION_FRAME_DURATION = 1000 / 60; private static final int EXPANDED_FULL_OPEN = -10001; private static final int COLLAPSED_FULL_CLOSED = -10002; private final int mHandleId; private final int mContentId; private View mHandle; private View mContent; private final Rect mFrame = new Rect(); private final Rect mInvalidate = new Rect(); private boolean mTracking; private boolean mLocked; private VelocityTracker mVelocityTracker; private boolean mVertical; private boolean mExpanded; private int mBottomOffset; private int mTopOffset; private int mHandleHeight; private int mHandleWidth; private OnDrawerOpenListener mOnDrawerOpenListener; private OnDrawerCloseListener mOnDrawerCloseListener; private OnDrawerScrollListener mOnDrawerScrollListener; private final Handler mHandler = new SlidingHandler(); private float mAnimatedAcceleration; private float mAnimatedVelocity; private float mAnimationPosition; private long mAnimationLastTime; private long mCurrentAnimationTime; private int mTouchDelta; private boolean mAnimating; private boolean mAllowSingleTap; private boolean mAnimateOnClick; private final int mTapThreshold; private final int mMaximumTapVelocity; private final int mMaximumMinorVelocity; private final int mMaximumMajorVelocity; private final int mMaximumAcceleration; private final int mVelocityUnits; /** * Callback invoked when the drawer is opened. */ public static interface OnDrawerOpenListener { /** * Invoked when the drawer becomes fully open. */ public void onDrawerOpened(); } /** * Callback invoked when the drawer is closed. */ public static interface OnDrawerCloseListener { /** * Invoked when the drawer becomes fully closed. */ public void onDrawerClosed(); } /** * Callback invoked when the drawer is scrolled. */ public static interface OnDrawerScrollListener { /** * Invoked when the user starts dragging/flinging the drawer's handle. */ public void onScrollStarted(); /** * Invoked when the user stops dragging/flinging the drawer's handle. */ public void onScrollEnded(); } /** * Creates a new SlidingDrawer from a specified set of attributes defined in XML. * * @param context The application's environment. * @param attrs The attributes defined in XML. */ public FishMeSlidingDrawer(Context context, AttributeSet attrs) { this(context, attrs, 0); } /** * Creates a new SlidingDrawer from a specified set of attributes defined in XML. * * @param context The application's environment. * @param attrs The attributes defined in XML. * @param defStyle The style to apply to this widget. */ public FishMeSlidingDrawer(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.FlyFotSlidingDrawer, defStyle, 0); int orientation = a.getInt(R.styleable.FlyFotSlidingDrawer_orientation, ORIENTATION_VERTICAL); mVertical = orientation == ORIENTATION_VERTICAL; mBottomOffset = (int) a.getDimension(R.styleable.FlyFotSlidingDrawer_bottomOffset, 0.0f); mTopOffset = (int) a.getDimension(R.styleable.FlyFotSlidingDrawer_topOffset, 0.0f); mAllowSingleTap = a.getBoolean(R.styleable.FlyFotSlidingDrawer_allowSingleTap, true); mAnimateOnClick = a.getBoolean(R.styleable.FlyFotSlidingDrawer_animateOnClick, true); int handleId = a.getResourceId(R.styleable.FlyFotSlidingDrawer_handle, 0); if (handleId == 0) { throw new IllegalArgumentException("The handle attribute is required and must refer " + "to a valid child."); } int contentId = a.getResourceId(R.styleable.FlyFotSlidingDrawer_content, 0); if (contentId == 0) { throw new IllegalArgumentException("The content attribute is required and must refer " + "to a valid child."); } if (handleId == contentId) { throw new IllegalArgumentException("The content and handle attributes must refer " + "to different children."); } mHandleId = handleId; mContentId = contentId; final float density = getResources().getDisplayMetrics().density; mTapThreshold = (int) (TAP_THRESHOLD * density + 0.5f); mMaximumTapVelocity = (int) (MAXIMUM_TAP_VELOCITY * density + 0.5f); mMaximumMinorVelocity = (int) (MAXIMUM_MINOR_VELOCITY * density + 0.5f); mMaximumMajorVelocity = (int) (MAXIMUM_MAJOR_VELOCITY * density + 0.5f); mMaximumAcceleration = (int) (MAXIMUM_ACCELERATION * density + 0.5f); mVelocityUnits = (int) (VELOCITY_UNITS * density + 0.5f); a.recycle(); setAlwaysDrawnWithCacheEnabled(false); } @Override protected void onFinishInflate() { mHandle = findViewById(mHandleId); if (mHandle == null) { throw new IllegalArgumentException("The handle attribute is must refer to an" + " existing child."); } mHandle.setOnClickListener(new DrawerToggler()); mContent = findViewById(mContentId); if (mContent == null) { throw new IllegalArgumentException("The content attribute is must refer to an" + " existing child."); } mContent.setVisibility(View.GONE); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec); int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec); int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); if (widthSpecMode == MeasureSpec.UNSPECIFIED || heightSpecMode == MeasureSpec.UNSPECIFIED) { throw new RuntimeException("SlidingDrawer cannot have UNSPECIFIED dimensions"); } final View handle = mHandle; measureChild(handle, widthMeasureSpec, heightMeasureSpec); if (mVertical) { int height = heightSpecSize - handle.getMeasuredHeight() - mTopOffset; mContent.measure(MeasureSpec.makeMeasureSpec(widthSpecSize, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY)); } else { int width = widthSpecSize - handle.getMeasuredWidth() - mTopOffset; mContent.measure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(heightSpecSize, MeasureSpec.EXACTLY)); } setMeasuredDimension(widthSpecSize, heightSpecSize); } @Override protected void dispatchDraw(Canvas canvas) { final long drawingTime = getDrawingTime(); final View handle = mHandle; final boolean isVertical = mVertical; drawChild(canvas, handle, drawingTime); if (mTracking || mAnimating) { final Bitmap cache = mContent.getDrawingCache(); if (cache != null) { if (isVertical) { canvas.drawBitmap(cache, 0, handle.getBottom(), null); } else { canvas.drawBitmap(cache, handle.getRight(), 0, null); } } else { canvas.save(); canvas.translate(isVertical ? 0 : handle.getLeft() - mTopOffset, isVertical ? handle.getTop() - mTopOffset : 0); drawChild(canvas, mContent, drawingTime); canvas.restore(); } } else if (mExpanded) { drawChild(canvas, mContent, drawingTime); } } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { if (mTracking) { return; } final int width = r - l; final int height = b - t; final View handle = mHandle; int childWidth = handle.getMeasuredWidth(); int childHeight = handle.getMeasuredHeight(); int childLeft; int childTop; final View content = mContent; if (mVertical) { childLeft = (width - childWidth) / 2; childTop = mExpanded ? mTopOffset : height - childHeight + mBottomOffset; content.layout(0, mTopOffset + childHeight, content.getMeasuredWidth(), mTopOffset + childHeight + content.getMeasuredHeight()); } else { childLeft = mExpanded ? mTopOffset : width - childWidth + mBottomOffset; childTop = (height - childHeight) / 2; content.layout(mTopOffset + childWidth, 0, mTopOffset + childWidth + content.getMeasuredWidth(), content.getMeasuredHeight()); } handle.layout(childLeft, childTop, childLeft + childWidth, childTop + childHeight); mHandleHeight = handle.getHeight(); mHandleWidth = handle.getWidth(); } @Override public boolean onInterceptTouchEvent(MotionEvent event) { if (mLocked) { return false; } final int action = event.getAction(); float x = event.getX(); float y = event.getY(); final Rect frame = mFrame; final View handle = mHandle; //TODO Button mainButton = (Button) findViewById(R.id.mainButton); handle.getHitRect(frame); //TODO frame.right = frame.right / 2 + 30; if (!mTracking && !frame.contains((int) x, (int) y)) { return false; } if (action == MotionEvent.ACTION_DOWN) { mTracking = true; //TODO mainButton.setPressed(true); // Must be called before prepareTracking() prepareContent(); // Must be called after prepareContent() if (mOnDrawerScrollListener != null) { mOnDrawerScrollListener.onScrollStarted(); } if (mVertical) { final int top = mHandle.getTop(); mTouchDelta = (int) y - top; prepareTracking(top); } else { final int left = mHandle.getLeft(); mTouchDelta = (int) x - left; prepareTracking(left); } mVelocityTracker.addMovement(event); } return true; } @Override public boolean onTouchEvent(MotionEvent event) { if (mLocked) { return true; } if (mTracking) { mVelocityTracker.addMovement(event); final int action = event.getAction(); switch (action) { case MotionEvent.ACTION_MOVE: moveHandle((int) (mVertical ? event.getY() : event.getX()) - mTouchDelta); break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: { final VelocityTracker velocityTracker = mVelocityTracker; velocityTracker.computeCurrentVelocity(mVelocityUnits); float yVelocity = velocityTracker.getYVelocity(); float xVelocity = velocityTracker.getXVelocity(); boolean negative; final boolean vertical = mVertical; if (vertical) { negative = yVelocity < 0; if (xVelocity < 0) { xVelocity = -xVelocity; } if (xVelocity > mMaximumMinorVelocity) { xVelocity = mMaximumMinorVelocity; } } else { negative = xVelocity < 0; if (yVelocity < 0) { yVelocity = -yVelocity; } if (yVelocity > mMaximumMinorVelocity) { yVelocity = mMaximumMinorVelocity; } } float velocity = (float) Math.hypot(xVelocity, yVelocity); if (negative) { velocity = -velocity; } final int top = mHandle.getTop(); final int left = mHandle.getLeft(); if (Math.abs(velocity) < mMaximumTapVelocity) { if (vertical ? (mExpanded && top < mTapThreshold + mTopOffset) || (!mExpanded && top > mBottomOffset + getBottom() - getTop() - mHandleHeight - mTapThreshold) : (mExpanded && left < mTapThreshold + mTopOffset) || (!mExpanded && left > mBottomOffset + getRight() - getLeft() - mHandleWidth - mTapThreshold)) { if (mAllowSingleTap) { playSoundEffect(SoundEffectConstants.CLICK); if (mExpanded) { animateClose(vertical ? top : left); } else { animateOpen(vertical ? top : left); } } else { performFling(vertical ? top : left, velocity, false); } } else { performFling(vertical ? top : left, velocity, false); } } else { performFling(vertical ? top : left, velocity, false); } } break; } } return mTracking || mAnimating || super.onTouchEvent(event); } private void animateClose(int position) { prepareTracking(position); performFling(position, mMaximumAcceleration, true); } private void animateOpen(int position) { prepareTracking(position); performFling(position, -mMaximumAcceleration, true); } private void performFling(int position, float velocity, boolean always) { mAnimationPosition = position; mAnimatedVelocity = velocity; if (mExpanded) { if (always || (velocity > mMaximumMajorVelocity || (position > mTopOffset + (mVertical ? mHandleHeight : mHandleWidth) && velocity > -mMaximumMajorVelocity))) { // We are expanded, but they didn't move sufficiently to cause // us to retract. Animate back to the expanded position. mAnimatedAcceleration = mMaximumAcceleration; if (velocity < 0) { mAnimatedVelocity = 0; } } else { // We are expanded and are now going to animate away. mAnimatedAcceleration = -mMaximumAcceleration; if (velocity > 0) { mAnimatedVelocity = 0; } } } else { if (!always && (velocity > mMaximumMajorVelocity || (position > (mVertical ? getHeight() : getWidth()) / 2 && velocity > -mMaximumMajorVelocity))) { // We are collapsed, and they moved enough to allow us to expand. mAnimatedAcceleration = mMaximumAcceleration; if (velocity < 0) { mAnimatedVelocity = 0; } } else { // We are collapsed, but they didn't move sufficiently to cause // us to retract. Animate back to the collapsed position. mAnimatedAcceleration = -mMaximumAcceleration; if (velocity > 0) { mAnimatedVelocity = 0; } } } long now = SystemClock.uptimeMillis(); mAnimationLastTime = now; mCurrentAnimationTime = now + ANIMATION_FRAME_DURATION; mAnimating = true; mHandler.removeMessages(MSG_ANIMATE); mHandler.sendMessageAtTime(mHandler.obtainMessage(MSG_ANIMATE), mCurrentAnimationTime); stopTracking(); } private void prepareTracking(int position) { mTracking = true; mVelocityTracker = VelocityTracker.obtain(); boolean opening = !mExpanded; if (opening) { mAnimatedAcceleration = mMaximumAcceleration; mAnimatedVelocity = mMaximumMajorVelocity; mAnimationPosition = mBottomOffset + (mVertical ? getHeight() - mHandleHeight : getWidth() - mHandleWidth); moveHandle((int) mAnimationPosition); mAnimating = true; mHandler.removeMessages(MSG_ANIMATE); long now = SystemClock.uptimeMillis(); mAnimationLastTime = now; mCurrentAnimationTime = now + ANIMATION_FRAME_DURATION; mAnimating = true; } else { if (mAnimating) { mAnimating = false; mHandler.removeMessages(MSG_ANIMATE); } moveHandle(position); } } private void moveHandle(int position) { final View handle = mHandle; if (mVertical) { if (position == EXPANDED_FULL_OPEN) { handle.offsetTopAndBottom(mTopOffset - handle.getTop()); invalidate(); } else if (position == COLLAPSED_FULL_CLOSED) { handle.offsetTopAndBottom(mBottomOffset + getBottom() - getTop() - mHandleHeight - handle.getTop()); invalidate(); } else { final int top = handle.getTop(); int deltaY = position - top; if (position < mTopOffset) { deltaY = mTopOffset - top; } else if (deltaY > mBottomOffset + getBottom() - getTop() - mHandleHeight - top) { deltaY = mBottomOffset + getBottom() - getTop() - mHandleHeight - top; } handle.offsetTopAndBottom(deltaY); final Rect frame = mFrame; final Rect region = mInvalidate; handle.getHitRect(frame); region.set(frame); region.union(frame.left, frame.top - deltaY, frame.right, frame.bottom - deltaY); region.union(0, frame.bottom - deltaY, getWidth(), frame.bottom - deltaY + mContent.getHeight()); invalidate(region); } } else { if (position == EXPANDED_FULL_OPEN) { handle.offsetLeftAndRight(mTopOffset - handle.getLeft()); invalidate(); } else if (position == COLLAPSED_FULL_CLOSED) { handle.offsetLeftAndRight(mBottomOffset + getRight() - getLeft() - mHandleWidth - handle.getLeft()); invalidate(); } else { final int left = handle.getLeft(); int deltaX = position - left; if (position < mTopOffset) { deltaX = mTopOffset - left; } else if (deltaX > mBottomOffset + getRight() - getLeft() - mHandleWidth - left) { deltaX = mBottomOffset + getRight() - getLeft() - mHandleWidth - left; } handle.offsetLeftAndRight(deltaX); final Rect frame = mFrame; final Rect region = mInvalidate; handle.getHitRect(frame); region.set(frame); region.union(frame.left - deltaX, frame.top, frame.right - deltaX, frame.bottom); region.union(frame.right - deltaX, 0, frame.right - deltaX + mContent.getWidth(), getHeight()); invalidate(region); } } } private void prepareContent() { if (mAnimating) { return; } // Something changed in the content, we need to honor the layout request // before creating the cached bitmap final View content = mContent; if (content.isLayoutRequested()) { if (mVertical) { final int childHeight = mHandleHeight; int height = getBottom() - getTop() - childHeight - mTopOffset; content.measure(MeasureSpec.makeMeasureSpec(getRight() - getLeft(), MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY)); content.layout(0, mTopOffset + childHeight, content.getMeasuredWidth(), mTopOffset + childHeight + content.getMeasuredHeight()); } else { final int childWidth = mHandle.getWidth(); int width = getRight() - getLeft() - childWidth - mTopOffset; content.measure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(getBottom() - getTop(), MeasureSpec.EXACTLY)); content.layout(childWidth + mTopOffset, 0, mTopOffset + childWidth + content.getMeasuredWidth(), content.getMeasuredHeight()); } } // Try only once... we should really loop but it's not a big deal // if the draw was cancelled, it will only be temporary anyway content.getViewTreeObserver().dispatchOnPreDraw(); content.buildDrawingCache(); content.setVisibility(View.GONE); } private void stopTracking() { mHandle.setPressed(false); mTracking = false; if (mOnDrawerScrollListener != null) { mOnDrawerScrollListener.onScrollEnded(); } if (mVelocityTracker != null) { mVelocityTracker.recycle(); mVelocityTracker = null; } } private void doAnimation() { if (mAnimating) { incrementAnimation(); if (mAnimationPosition >= mBottomOffset + (mVertical ? getHeight() : getWidth()) - 1) { mAnimating = false; closeDrawer(); } else if (mAnimationPosition < mTopOffset) { mAnimating = false; openDrawer(); } else { moveHandle((int) mAnimationPosition); mCurrentAnimationTime += ANIMATION_FRAME_DURATION; mHandler.sendMessageAtTime(mHandler.obtainMessage(MSG_ANIMATE), mCurrentAnimationTime); } } } private void incrementAnimation() { long now = SystemClock.uptimeMillis(); float t = (now - mAnimationLastTime) / 1000.0f; // ms -> s final float position = mAnimationPosition; final float v = mAnimatedVelocity; // px/s final float a = mAnimatedAcceleration; // px/s/s mAnimationPosition = position + (v * t) + (0.5f * a * t * t); // px mAnimatedVelocity = v + (a * t); // px/s mAnimationLastTime = now; // ms } /** * Toggles the drawer open and close. Takes effect immediately. * * @see #open() * @see #close() * @see #animateClose() * @see #animateOpen() * @see #animateToggle() */ public void toggle() { if (!mExpanded) { openDrawer(); } else { closeDrawer(); } invalidate(); requestLayout(); } /** * Toggles the drawer open and close with an animation. * * @see #open() * @see #close() * @see #animateClose() * @see #animateOpen() * @see #toggle() */ public void animateToggle() { if (!mExpanded) { animateOpen(); } else { animateClose(); } } /** * Opens the drawer immediately. * * @see #toggle() * @see #close() * @see #animateOpen() */ public void open() { openDrawer(); invalidate(); requestLayout(); sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED); } /** * Closes the drawer immediately. * * @see #toggle() * @see #open() * @see #animateClose() */ public void close() { closeDrawer(); invalidate(); requestLayout(); } /** * Closes the drawer with an animation. * * @see #close() * @see #open() * @see #animateOpen() * @see #animateToggle() * @see #toggle() */ public void animateClose() { prepareContent(); final OnDrawerScrollListener scrollListener = mOnDrawerScrollListener; if (scrollListener != null) { scrollListener.onScrollStarted(); } animateClose(mVertical ? mHandle.getTop() : mHandle.getLeft()); if (scrollListener != null) { scrollListener.onScrollEnded(); } } /** * Opens the drawer with an animation. * * @see #close() * @see #open() * @see #animateClose() * @see #animateToggle() * @see #toggle() */ public void animateOpen() { prepareContent(); final OnDrawerScrollListener scrollListener = mOnDrawerScrollListener; if (scrollListener != null) { scrollListener.onScrollStarted(); } animateOpen(mVertical ? mHandle.getTop() : mHandle.getLeft()); sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED); if (scrollListener != null) { scrollListener.onScrollEnded(); } } private void closeDrawer() { moveHandle(COLLAPSED_FULL_CLOSED); mContent.setVisibility(View.GONE); mContent.destroyDrawingCache(); if (!mExpanded) { return; } mExpanded = false; if (mOnDrawerCloseListener != null) { mOnDrawerCloseListener.onDrawerClosed(); } } private void openDrawer() { moveHandle(EXPANDED_FULL_OPEN); mContent.setVisibility(View.VISIBLE); if (mExpanded) { return; } mExpanded = true; if (mOnDrawerOpenListener != null) { mOnDrawerOpenListener.onDrawerOpened(); } } /** * Sets the listener that receives a notification when the drawer becomes open. * * @param onDrawerOpenListener The listener to be notified when the drawer is opened. */ public void setOnDrawerOpenListener(OnDrawerOpenListener onDrawerOpenListener) { mOnDrawerOpenListener = onDrawerOpenListener; } /** * Sets the listener that receives a notification when the drawer becomes close. * * @param onDrawerCloseListener The listener to be notified when the drawer is closed. */ public void setOnDrawerCloseListener(OnDrawerCloseListener onDrawerCloseListener) { mOnDrawerCloseListener = onDrawerCloseListener; } /** * Sets the listener that receives a notification when the drawer starts or ends * a scroll. A fling is considered as a scroll. A fling will also trigger a * drawer opened or drawer closed event. * * @param onDrawerScrollListener The listener to be notified when scrolling * starts or stops. */ public void setOnDrawerScrollListener(OnDrawerScrollListener onDrawerScrollListener) { mOnDrawerScrollListener = onDrawerScrollListener; } /** * Returns the handle of the drawer. * * @return The View reprenseting the handle of the drawer, identified by * the "handle" id in XML. */ public View getHandle() { return mHandle; } /** * Returns the content of the drawer. * * @return The View reprenseting the content of the drawer, identified by * the "content" id in XML. */ public View getContent() { return mContent; } /** * Unlocks the SlidingDrawer so that touch events are processed. * * @see #lock() */ public void unlock() { mLocked = false; } /** * Locks the SlidingDrawer so that touch events are ignores. * * @see #unlock() */ public void lock() { mLocked = true; } /** * Indicates whether the drawer is currently fully opened. * * @return True if the drawer is opened, false otherwise. */ public boolean isOpened() { return mExpanded; } /** * Indicates whether the drawer is scrolling or flinging. * * @return True if the drawer is scroller or flinging, false otherwise. */ public boolean isMoving() { return mTracking || mAnimating; } private class DrawerToggler implements OnClickListener { public void onClick(View v) { if (mLocked) { return; } // mAllowSingleTap isn't relevant here; you're *always* // allowed to open/close the drawer by clicking with the // trackball. if (mAnimateOnClick) { animateToggle(); } else { toggle(); } } } private class SlidingHandler extends Handler { public void handleMessage(Message m) { switch (m.what) { case MSG_ANIMATE: doAnimation(); break; } } }}