android.graphics.Rect Java Examples

/**
 * Creates a {@link LayoutManager} instance.
 * @param host A {@link LayoutManagerHost} instance.
 */
public LayoutManager(LayoutManagerHost host) {
    mHost = host;
    mPxToDp = 1.f / mHost.getContext().getResources().getDisplayMetrics().density;
    mSceneChangeObservers = new ObserverList<SceneChangeObserver>();

    int hostWidth = host.getWidth();
    int hostHeight = host.getHeight();
    mLastViewportPx.set(0, 0, hostWidth, hostHeight);
    mLastVisibleViewportPx.set(0, 0, hostWidth, hostHeight);
    mLastFullscreenViewportPx.set(0, 0, hostWidth, hostHeight);

    mLastContentWidthDp = hostWidth * mPxToDp;
    mLastContentHeightDp = hostHeight * mPxToDp;
    mLastViewportDp.set(0, 0, mLastContentWidthDp, mLastContentHeightDp);
    mLastVisibleViewportDp.set(0, 0, mLastContentWidthDp, mLastContentHeightDp);
    mLastFullscreenViewportDp.set(0, 0, mLastContentWidthDp, mLastContentHeightDp);

    mCachedVisibleViewport = new Rect();

    mLastHeightMinusBrowserControlsDp = mLastContentHeightDp;
}
 

@Override
public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
    if(parent.getChildAdapterPosition(view) == 0) {
        if(orientation == SnappingRecyclerView.VERTICAL) {
            outRect.top = (parent.getHeight() / 2) - (view.getHeight() / 2);
        } else {
            outRect.left = (parent.getWidth() / 2) - (view.getWidth() / 2);
        }
    } else if (parent.getChildAdapterPosition(view) == parent.getAdapter().getItemCount() - 1) {
        if(orientation == SnappingRecyclerView.VERTICAL) {
            outRect.bottom = (parent.getHeight() / 2) - (view.getHeight() / 2);
        } else {
            outRect.right = (parent.getWidth() / 2) - (view.getWidth() / 2);
        }
    }
}
 

void handleMotion(int edge, float dx, float dy) {
    Rect r = computeLayout();
    if (edge == MOVE) {
        // Convert to image space before sending to moveBy()
        moveBy(dx * (cropRect.width() / r.width()),
               dy * (cropRect.height() / r.height()));
    } else {
        if (((GROW_LEFT_EDGE | GROW_RIGHT_EDGE) & edge) == 0) {
            dx = 0;
        }

        if (((GROW_TOP_EDGE | GROW_BOTTOM_EDGE) & edge) == 0) {
            dy = 0;
        }

        // Convert to image space before sending to growBy()
        float xDelta = dx * (cropRect.width() / r.width());
        float yDelta = dy * (cropRect.height() / r.height());
        growBy((((edge & GROW_LEFT_EDGE) != 0) ? -1 : 1) * xDelta,
                (((edge & GROW_TOP_EDGE) != 0) ? -1 : 1) * yDelta);
    }
}
 

private void drawStage2(Canvas canvas, float progress) {
    final Rect bounds = getBounds();

    progress = interpolator.getInterpolation(progress);

    tempRect.left = (int) (AndroidUtilities.dp(2) * scaleX);
    tempRect.bottom = bounds.bottom - ((int) (AndroidUtilities.dp(6) * scaleY));
    tempRect.right = bounds.right - tempRect.left;
    tempRect.top = tempRect.bottom - ((int) (AndroidUtilities.dp(4) * scaleY));
    tempRect.offset(0, AndroidUtilities.dp(AndroidUtilities.lerp(0, -8, progress)));
    secondaryRectDrawable.setBounds(tempRect);
    secondaryRectDrawable.draw(canvas);

    tempRect.left = (int) (AndroidUtilities.dpf2(AndroidUtilities.lerp(1, 2, progress)) * scaleX);
    tempRect.top = (int) (AndroidUtilities.dpf2(AndroidUtilities.lerp(5, 6, progress)) * scaleY);
    tempRect.right = bounds.right - tempRect.left;
    tempRect.bottom = tempRect.top + (int) (AndroidUtilities.dpf2(AndroidUtilities.lerp(6, 4, progress)) * scaleY);
    tempRect.offset(0, AndroidUtilities.dp(AndroidUtilities.lerp(0, 8, progress)));
    primaryRectDrawable.setBounds(tempRect);
    primaryRectDrawable.setAlpha(255);
    primaryRectDrawable.draw(canvas);
}
 

/**
 * A factory method to build the appropriate LuminanceSource object based on the format
 * of the preview buffers, as described by Camera.Parameters.
 *
 * @param data   A preview frame.
 * @param width  The width of the image.
 * @param height The height of the image.
 * @return A PlanarYUVLuminanceSource instance.
 */
public PlanarYUVLuminanceSource buildLuminanceSource(byte[] data, int width, int height) {
    Rect rect = getFramingRectInPreview();
    int previewFormat = configManager.getPreviewFormat();
    String previewFormatString = configManager.getPreviewFormatString();
    switch (previewFormat) {
        // This is the standard Android format which all devices are REQUIRED to support.
        // In theory, it's the only one we should ever care about.
        case ImageFormat.NV21:
            // This format has never been seen in the wild, but is compatible as we only care
            // about the Y channel, so allow it.
        case ImageFormat.NV16:
            return new PlanarYUVLuminanceSource(data, width, height, rect.left, rect.top,
                    rect.width(), rect.height());
        default:
            // The Samsung Moment incorrectly uses this variant instead of the 'sp' version.
            // Fortunately, it too has all the Y data up front, so we can read it.
            if ("yuv420p".equals(previewFormatString)) {
                return new PlanarYUVLuminanceSource(data, width, height, rect.left, rect.top,
                        rect.width(), rect.height());
            }
    }
    throw new IllegalArgumentException("Unsupported picture format: " +
            previewFormat + '/' + previewFormatString);
}
 

private ContrastSwatch(Parcel source) {
    mBackgroundColors = new LinkedList<Integer>();
    mForegroundColors = new LinkedList<Integer>();
    mLuminanceMap = new HashMap<Integer, Double>();
    mLuminanceHistogram = new HashMap<Double, Integer>();

    mName = source.readString();
    source.readMap(mLuminanceMap, null);
    source.readMap(mLuminanceHistogram, null);
    source.readList(mBackgroundColors, null);
    source.readList(mForegroundColors, null);
    mBackgroundLuminance = source.readDouble();
    mForegroundLuminance = source.readDouble();
    mScreenBounds = (Rect) source.readValue(Rect.class.getClassLoader());
    mContrastRatio = source.readDouble();
}
 

private static Bitmap createDrawableBitmap(Drawable drawable) {
    int width = drawable.getIntrinsicWidth();
    int height = drawable.getIntrinsicHeight();
    if (width <= 0 || height <= 0) {
        return null;
    }
    float scale = Math.min(1.0f, ((float) MAX_IMAGE_SIZE) / ((float) (width * height)));
    if ((drawable instanceof BitmapDrawable) && scale == 1.0f) {
        return ((BitmapDrawable) drawable).getBitmap();
    }
    int bitmapWidth = (int) (((float) width) * scale);
    int bitmapHeight = (int) (((float) height) * scale);
    Bitmap bitmap = Bitmap.createBitmap(bitmapWidth, bitmapHeight, Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    Rect existingBounds = drawable.getBounds();
    int left = existingBounds.left;
    int top = existingBounds.top;
    int right = existingBounds.right;
    int bottom = existingBounds.bottom;
    drawable.setBounds(0, 0, bitmapWidth, bitmapHeight);
    drawable.draw(canvas);
    drawable.setBounds(left, top, right, bottom);
    return bitmap;
}
 

@Override
public void draw(Canvas canvas) {
	Rect bounds = getBounds();
	int radius = Math.min(bounds.width(), bounds.height()) / 2;
	int cx = bounds.centerX();
	int cy = bounds.centerY();
	Paint paint = this.paint;
	paint.setColor(background);
	canvas.drawCircle(cx, cy, radius * 1f, paint);
	if (accent != primary && accent != Color.TRANSPARENT) {
		RectF rectF = this.rectF;
		applyRectRadius(rectF, cx, cy, radius * 0.8f);
		paint.setColor(accent);
		canvas.drawArc(rectF, -20, 130, true, paint);
		paint.setColor(background);
		canvas.drawCircle(cx, cy, radius * 0.7f, paint);
		paint.setColor(primary);
		canvas.drawCircle(cx, cy, radius * 0.65f, paint);
		canvas.drawArc(rectF, 114, 222, true, paint);
	} else {
		paint.setColor(primary);
		canvas.drawCircle(cx, cy, radius * 0.8f, paint);
	}
}
 

/**
 * 截屏，只能截取当前屏幕显示的区域，不包含status bar
 */
public static Bitmap screenShot(Activity activity){
    View view = activity.getWindow().getDecorView();
    view.setDrawingCacheEnabled(true);
    view.buildDrawingCache();
    Bitmap b1 = view.getDrawingCache();
    // 获取状态栏高度
    Rect frame = new Rect();
    activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
    int statusBarHeight = frame.top;
    // 获取屏幕长和高
    int width = CommonUtils.getScreenWidth();
    int height = CommonUtils.getScreenHeight();
    // 去掉标题栏
    Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height - statusBarHeight);
    view.destroyDrawingCache();
    return b;
}
 

/**
 * close surface
 * @param smooth smoothly or not.
 * @param notify if notify all the listeners.
 */
public void close(boolean smooth, boolean notify){
    ViewGroup surface = getSurfaceView();
    int dx, dy;
    if(smooth)
        mDragHelper.smoothSlideViewTo(getSurfaceView(), getPaddingLeft(), getPaddingTop());
    else {
        Rect rect = computeSurfaceLayoutArea(false);
        dx = rect.left - surface.getLeft();
        dy = rect.top - surface.getTop();
        surface.layout(rect.left, rect.top, rect.right, rect.bottom);
        if(notify) {
            dispatchRevealEvent(rect.left, rect.top, rect.right, rect.bottom);
            dispatchSwipeEvent(rect.left, rect.top, dx, dy);
        }else{
            safeBottomView();
        }
    }
    invalidate();
}
 

private void drawStaticFocus(Canvas paramCanvas) {
	float f1 = this.mScaleXValue - 1.0F;
	float f2 = this.mScaleYValue - 1.0F;
	int i = this.mFrameRate;
	int j = this.mCurrentFrame;
	float f3 = 1.0F + f1 * j / i;
	float f4 = 1.0F + f2 * j / i;
	Rect localRect = getDstRectAfterScale(true);
	if (null == localRect) {
		return;
	}
	this.mFocusRect = localRect;
	this.mCurrentRect = localRect;
	if (isLastFrame()) {
		this.mMySelectedDrawableShadow.setBounds(localRect);
		this.mMySelectedDrawableShadow.draw(paramCanvas);
		this.mMySelectedDrawableShadow.setVisible(true, true);
	} else {
		this.mMySelectedDrawable.setBounds(localRect);
		this.mMySelectedDrawable.draw(paramCanvas);
		this.mMySelectedDrawable.setVisible(true, true);
	}
	if ((this.mSelectedView != null) && (paramCanvas != null) && ((this.mState == 0) || (isLastFrame()))) {
		drawChild(paramCanvas);
	}
}
 

/**
 * 获取当前屏幕截图，不包含状态栏
 *
 * @param activity
 * @return
 */
public static Bitmap snapShotWithoutStatusBar(Activity activity) {
    View view = activity.getWindow().getDecorView();
    view.setDrawingCacheEnabled(true);
    view.buildDrawingCache();
    Bitmap bmp = view.getDrawingCache();
    Rect frame = new Rect();
    activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
    int statusBarHeight = frame.top;

    int width = getScreenWidth(activity);
    int height = getScreenHeight(activity);
    Bitmap bp = null;
    bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height
            - statusBarHeight);
    view.destroyDrawingCache();
    return bp;

}
 

/**
 * Draws a black border over the screenshot of the view passed in.
 */
protected Bitmap getBitmapWithBorder(View v)
{
    Bitmap bitmap = getBitmapFromView(v);
    Canvas canvas = new Canvas(bitmap);

    Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());

    canvas.drawBitmap(bitmap, 0, 0, null);

    Paint paint = new Paint();
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeWidth(LINE_THICKNESS);

    int accentColor = ControlHelper.getColor(getContext(), R.attr.colorAccent);

    paint.setColor(accentColor);
    canvas.drawRect(rect, paint);

    return bitmap;
}
 

@TargetApi(Build.VERSION_CODES.M)
public Bundle getActivityLaunchOptions(View v) {
    if (AndroidVersion.isAtLeastMarshmallow) {
        int left = 0, top = 0;
        int width = v.getMeasuredWidth(), height = v.getMeasuredHeight();
        if (v instanceof TextView) {
            // Launch from center of icon, not entire view
            Drawable icon = Workspace.getTextViewIcon((TextView) v);
            if (icon != null) {
                Rect bounds = icon.getBounds();
                left = (width - bounds.width()) / 2;
                top = v.getPaddingTop();
                width = bounds.width();
                height = bounds.height();
            }
        }
        return ActivityOptions.makeClipRevealAnimation(v, left, top, width, height).toBundle();
    } else if (AndroidVersion.isAtLeastLollipopMR1) {
        // On L devices, we use the device default slide-up transition.
        // On L MR1 devices, we use a custom version of the slide-up transition which
        // doesn't have the delay present in the device default.
        return ActivityOptions.makeCustomAnimation(
                this, R.anim.task_open_enter, R.anim.no_anim).toBundle();
    }
    return null;
}
 

/**
     * Like {@link #getFramingRect} but coordinates are in terms of the preview frame,
     * not UI / screen.
     */
    public Rect getFramingRectInPreview() {
        if (framingRectInPreview == null) {
            Rect rect = new Rect(getFramingRect());
            Point cameraResolution = configManager.getCameraResolution();
            Point screenResolution = configManager.getScreenResolution();
            //modify here
//      rect.left = rect.left * cameraResolution.x / screenResolution.x;
//      rect.right = rect.right * cameraResolution.x / screenResolution.x;
//      rect.top = rect.top * cameraResolution.y / screenResolution.y;
//      rect.bottom = rect.bottom * cameraResolution.y / screenResolution.y;
            rect.left = rect.left * cameraResolution.y / screenResolution.x;
            rect.right = rect.right * cameraResolution.y / screenResolution.x;
            rect.top = rect.top * cameraResolution.x / screenResolution.y;
            rect.bottom = rect.bottom * cameraResolution.x / screenResolution.y;
            framingRectInPreview = rect;
        }
        return framingRectInPreview;
    }
 

private boolean drawGestureTrails(final Canvas offscreenCanvas, final Paint paint,
        final Rect dirtyRect) {
    // Clear previous dirty rectangle.
    if (!dirtyRect.isEmpty()) {
        paint.setColor(Color.TRANSPARENT);
        paint.setStyle(Paint.Style.FILL);
        offscreenCanvas.drawRect(dirtyRect, paint);
    }
    dirtyRect.setEmpty();
    boolean needsUpdatingGestureTrail = false;
    // Draw gesture trails to offscreen buffer.
    synchronized (mGestureTrails) {
        // Trails count == fingers count that have ever been active.
        final int trailsCount = mGestureTrails.size();
        for (int index = 0; index < trailsCount; index++) {
            final GestureTrailDrawingPoints trail = mGestureTrails.valueAt(index);
            needsUpdatingGestureTrail |= trail.drawGestureTrail(offscreenCanvas, paint,
                    mGestureTrailBoundsRect, mDrawingParams);
            // {@link #mGestureTrailBoundsRect} has bounding box of the trail.
            dirtyRect.union(mGestureTrailBoundsRect);
        }
    }
    return needsUpdatingGestureTrail;
}
 

@Override protected final boolean fitSystemWindows(@NonNull Rect insets) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        // Intentionally do not modify the bottom inset. For some reason,
        // if the bottom inset is modified, window resizing stops working.
        // TODO: Figure out why.

        mInsets[0] = insets.left;
        mInsets[1] = insets.top;
        mInsets[2] = insets.right;

        insets.left = 0;
        insets.top = 0;
        insets.right = 0;
    }

    return super.fitSystemWindows(insets);
}
 

/**
 * Allows third party apps to specify the scanning rectangle dimensions, rather than determine
 * them automatically based on screen resolution.
 *
 * @param width The width in pixels to scan.
 * @param height The height in pixels to scan.
 */
public synchronized void setManualFramingRect(int width, int height) {
  if (initialized) {
    Point screenResolution = configManager.getScreenResolution();
    if (width > screenResolution.x) {
      width = screenResolution.x;
    }
    if (height > screenResolution.y) {
      height = screenResolution.y;
    }
    int leftOffset = (screenResolution.x - width) / 2;
    int topOffset = (screenResolution.y - height) / 2;
    framingRect = new Rect(leftOffset, topOffset, leftOffset + width, topOffset + height);
    Log.d(TAG, "Calculated manual framing rect: " + framingRect);
    framingRectInPreview = null;
  } else {
    requestedFramingRectWidth = width;
    requestedFramingRectHeight = height;
  }
}
 

/**
 * Calculate the bounds for UrlViewport and set them to out rect.
 */
private void updateUrlViewportBounds(Rect out, VisualState visualState,
        boolean ignoreTranslationY) {
    // Calculate the visible boundaries of the left and right most child views
    // of the location bar.
    int leftViewPosition = (int) MathUtils.interpolate(
            getViewBoundsLeftOfLocationBar(visualState), 0f, mUrlExpansionPercent)
            - mUrlBackgroundPadding.left;
    int rightViewPosition = (int) MathUtils.interpolate(
            getViewBoundsRightOfLocationBar(visualState), getWidth(), mUrlExpansionPercent)
            + mUrlBackgroundPadding.right;

    // The bounds are set by the following:
    // - The left most visible location bar child view.
    // - The top of the viewport is aligned with the top of the location bar.
    // - The right most visible location bar child view.
    // - The bottom of the viewport is aligned with the bottom of the location bar.
    // Additional padding can be applied for use during animations.
    float yOffset = ignoreTranslationY ? mPhoneLocationBar.getTop() : mPhoneLocationBar.getY();

    out.set(leftViewPosition,
            (int) (yOffset - (mUrlBackgroundPadding.top * mUrlExpansionPercent)),
            rightViewPosition,
            (int) (yOffset + MathUtils.interpolate(mPhoneLocationBar.getMeasuredHeight(),
                    getHeight() + mUrlBackgroundPadding.bottom, mUrlExpansionPercent)));
}
 

private int drawMaskingLayer(Canvas canvas, Rect bounds, PorterDuffXfermode mode) {
    // Ensure that DST_IN blends using the entire layer.
    canvas.drawColor(Color.TRANSPARENT);

    mMask.draw(canvas);

    return -1;
}
 

@Override
public void setInsets(Rect insets) {
    final int n = getChildCount();
    for (int i = 0; i < n; i++) {
        final View child = getChildAt(i);
        setFrameLayoutChildInsets(child, insets, mInsets);
    }
    mInsets.set(insets);
}
 

@Override
public boolean dispatchTouchEvent(MotionEvent event) {
    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        View myView = getCurrentFocus();
        if (myView instanceof EditText) {
            Rect rect = new Rect();
            myView.getGlobalVisibleRect(rect);
            if (!rect.contains((int) event.getRawX(), (int) event.getRawY())) {
                myView.clearFocus();
            }
        }
    }
    return super.dispatchTouchEvent(event);
}
 

@OnBoundsDefined
static void onBoundsDefined(
    ComponentContext c, ComponentLayout layout, Output<Rect> viewportDimensions) {
  final int width = layout.getWidth();
  final int height = layout.getHeight();
  int paddingX = 0, paddingY = 0;
  if (layout.isPaddingSet()) {
    paddingX = layout.getPaddingLeft() + layout.getPaddingRight();
    paddingY = layout.getPaddingTop() + layout.getPaddingBottom();
  }

  viewportDimensions.set(new Rect(0, 0, width - paddingX, height - paddingY));
}
 

/**
 * 获取自定义属性的值
 *
 * @param context
 * @param attrs
 * @param defStyleAttr
 */
public ChangeColorIconWithText(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);

    TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ChangeColorIconWithText);
    int n = a.getIndexCount();
    for (int i = 0; i < n; i++) {
        int attr = a.getIndex(i);
        switch (attr) {
            case R.styleable.ChangeColorIconWithText_icon:
                BitmapDrawable drawable = (BitmapDrawable) a.getDrawable(attr);
                if (drawable != null) {
                    mIconBitmap = drawable.getBitmap();
                }
                break;
            case R.styleable.ChangeColorIconWithText_color:
                mColor = a.getColor(attr, 0xFF45C01A);
                break;
            case R.styleable.ChangeColorIconWithText_text:
                mText = a.getString(attr);
                break;
            case R.styleable.ChangeColorIconWithText_text_size:
                mTextSize = (int) a.getDimension(attr,
                        TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 12,
                                getResources().getDisplayMetrics()));
                break;
        }
    }
    a.recycle();

    //初始化成员变量
    mTextBound = new Rect();
    mTextPaint = new Paint();
    mTextPaint.setTextSize(mTextSize);
    mTextPaint.setColor(0xff555555);
    mTextPaint.getTextBounds(mText, 0, mText.length(), mTextBound);
    mTextPaint.setAntiAlias(true); //抗锯齿
}
 

@Test
public void testResizeRect_correctSize() {
  Rect testRect = new Rect(0, 0, 48, 48);
  Rect expected = new Rect(0, 0, 48, 48);
  AccessibilityUtils.resizeRect(48, testRect);
  assertTrue(testRect.equals(expected));
}
 

@Override
public void beforeMount(TransitionsExtensionInput input, Rect localVisibleRect) {
  resetAcquiredReferences();
  mInput = input;

  if (input.getComponentTreeId() != mLastMountedComponentTreeId) {
    mLastTransitionsExtensionInput = null;
  }

  updateTransitions(input, ((LithoView) mLithoView).getComponentTree());
  extractDisappearingItems(input);
}
 

@Override
protected void onFocusChanged(boolean focused, int direction, Rect previouslyFocusedRect) {
    super.onFocusChanged(focused, direction, previouslyFocusedRect);
    if (focused)
        mFormatBar.setEditText(this);
    else
        mFormatBar.setEditText(null);
}
 

/**
 * Specify extra padding that the wallpaper should have outside of the display.
 * That is, the given padding supplies additional pixels the wallpaper should extend
 * outside of the display itself.
 *
 * <p>This method requires the caller to hold the permission
 * {@link android.Manifest.permission#SET_WALLPAPER_HINTS}.
 *
 * @param padding The number of pixels the wallpaper should extend beyond the display,
 * on its left, top, right, and bottom sides.
 */
@RequiresPermission(android.Manifest.permission.SET_WALLPAPER_HINTS)
public void setDisplayPadding(Rect padding) {
    try {
        if (sGlobals.mService == null) {
            Log.w(TAG, "WallpaperService not running");
            throw new RuntimeException(new DeadSystemException());
        } else {
            sGlobals.mService.setDisplayPadding(padding, mContext.getOpPackageName());
        }
    } catch (RemoteException e) {
        throw e.rethrowFromSystemServer();
    }
}
 

public CoverPageAnim(int w, int h, View view, OnPageChangeListener listener) {
    super(w, h, view, listener);
    mSrcRect = new Rect(0, 0, mViewWidth, mViewHeight);
    mDestRect = new Rect(0, 0, mViewWidth, mViewHeight);
    int[] mBackShadowColors = new int[] { 0x66000000,0x00000000};
    mBackShadowDrawableLR = new GradientDrawable(
            GradientDrawable.Orientation.LEFT_RIGHT, mBackShadowColors);
    mBackShadowDrawableLR.setGradientType(GradientDrawable.LINEAR_GRADIENT);
}
 

/**
 * We only want the current page that is being shown to be focusable.
 */
@Override
protected boolean onRequestFocusInDescendants(int direction,
                                              Rect previouslyFocusedRect) {
    int index;
    int increment;
    int end;
    int count = getChildCount();
    if ((direction & FOCUS_FORWARD) != 0) {
        index = 0;
        increment = 1;
        end = count;
    } else {
        index = count - 1;
        increment = -1;
        end = -1;
    }
    for (int i = index; i != end; i += increment) {
        View child = getChildAt(i);
        if (child.getVisibility() == VISIBLE) {
            ItemInfo ii = infoForChild(child);
            if (ii != null && ii.position == mCurItem) {
                if (child.requestFocus(direction, previouslyFocusedRect)) {
                    return true;
                }
            }
        }
    }
    return false;
}