Examples with LayoutManager android.support.v7.widget.RecyclerView.LayoutManager used on opensource projects

Example 66 with LayoutManager

use of android.support.v7.widget.RecyclerView.LayoutManager in project CloudReader by youlookwhat.

the class XRecyclerView method onScrollStateChanged.

@Override
public void onScrollStateChanged(int state) {
    super.onScrollStateChanged(state);
    if (state == RecyclerView.SCROLL_STATE_IDLE && mLoadingListener != null && !isLoadingData && loadingMoreEnabled) {
        LayoutManager layoutManager = getLayoutManager();
        int lastVisibleItemPosition;
        if (layoutManager instanceof GridLayoutManager) {
            lastVisibleItemPosition = ((GridLayoutManager) layoutManager).findLastVisibleItemPosition();
        } else if (layoutManager instanceof StaggeredGridLayoutManager) {
            int[] into = new int[((StaggeredGridLayoutManager) layoutManager).getSpanCount()];
            ((StaggeredGridLayoutManager) layoutManager).findLastVisibleItemPositions(into);
            lastVisibleItemPosition = findMax(into);
        } else {
            lastVisibleItemPosition = ((LinearLayoutManager) layoutManager).findLastVisibleItemPosition();
        }
        if (layoutManager.getChildCount() > 0 && lastVisibleItemPosition >= layoutManager.getItemCount() - 1 && layoutManager.getItemCount() > layoutManager.getChildCount() && !isnomore && mRefreshHeader.getState() < YunRefreshHeader.STATE_REFRESHING) {
            View footView = mFootViews.get(0);
            isLoadingData = true;
            if (footView instanceof LoadingMoreFooter) {
                ((LoadingMoreFooter) footView).setState(LoadingMoreFooter.STATE_LOADING);
            } else {
                footView.setVisibility(View.VISIBLE);
            }
            if (isNetWorkConnected(getContext())) {
                mLoadingListener.onLoadMore();
            } else {
                postDelayed(new Runnable() {

                    @Override
                    public void run() {
                        mLoadingListener.onLoadMore();
                    }
                }, 1000);
            }
        }
    }
}

Example 67 with LayoutManager

use of android.support.v7.widget.RecyclerView.LayoutManager in project vlayout by alibaba.

the class MainActivity method onCreate.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_activity);
    final RecyclerView recyclerView = (RecyclerView) findViewById(R.id.main_view);
    VirtualLayoutManager layoutManager = new VirtualLayoutManager(this);
    recyclerView.setLayoutManager(layoutManager);
    //layoutManager.setReverseLayout(true);
    recyclerView.addItemDecoration(new RecyclerView.ItemDecoration() {

        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
            outRect.set(10, 10, 10, 10);
        }
    });
    final List<LayoutHelper> helpers = new LinkedList<>();
    final GridLayoutHelper gridLayoutHelper = new GridLayoutHelper(4);
    gridLayoutHelper.setItemCount(25);
    final ScrollFixLayoutHelper scrollFixLayoutHelper = new ScrollFixLayoutHelper(FixLayoutHelper.TOP_RIGHT, 100, 100);
    helpers.add(DefaultLayoutHelper.newHelper(7));
    helpers.add(scrollFixLayoutHelper);
    helpers.add(DefaultLayoutHelper.newHelper(2));
    helpers.add(gridLayoutHelper);
    layoutManager.setLayoutHelpers(helpers);
    recyclerView.setAdapter(new VirtualLayoutAdapter(layoutManager) {

        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            return new MainViewHolder(new TextView(MainActivity.this));
        }

        @Override
        public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
            VirtualLayoutManager.LayoutParams layoutParams = new VirtualLayoutManager.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 300);
            holder.itemView.setLayoutParams(layoutParams);
            ((TextView) holder.itemView).setText(Integer.toString(position));
            if (position == 7) {
                layoutParams.height = 60;
                layoutParams.width = 60;
            } else if (position > 35) {
                layoutParams.height = 200 + (position - 30) * 100;
            }
            if (position > 35) {
                holder.itemView.setBackgroundColor(0x66cc0000 + (position - 30) * 128);
            } else if (position % 2 == 0) {
                holder.itemView.setBackgroundColor(0xaa00ff00);
            } else {
                holder.itemView.setBackgroundColor(0xccff00ff);
            }
        }

        @Override
        public int getItemCount() {
            return 40;
        }
    });
    new Handler(Looper.getMainLooper()).postDelayed(new Runnable() {

        @Override
        public void run() {
            recyclerView.scrollToPosition(7);
            recyclerView.getAdapter().notifyDataSetChanged();
        }
    }, 6000);
}

Example 68 with LayoutManager

use of android.support.v7.widget.RecyclerView.LayoutManager in project vlayout by alibaba.

the class TestActivity method onCreate.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_activity);
    final RecyclerView recyclerView = (RecyclerView) findViewById(R.id.main_view);
    StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.VERTICAL);
    recyclerView.setLayoutManager(layoutManager);
    findViewById(R.id.jump).setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            EditText position = (EditText) findViewById(R.id.position);
            if (!TextUtils.isEmpty(position.getText())) {
                try {
                    int pos = Integer.parseInt(position.getText().toString());
                    recyclerView.scrollToPosition(pos);
                } catch (Exception e) {
                    Log.e("VlayoutActivity", e.getMessage(), e);
                }
            }
        }
    });
    recyclerView.addItemDecoration(new RecyclerView.ItemDecoration() {

        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
            outRect.set(4, 4, 4, 4);
        }
    });
    recyclerView.setAdapter(new RecyclerView.Adapter() {

        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            //                        TextView view = (TextView) LayoutInflater.from(TestActivity.this).inflate(R.layout.item, parent, false);
            //                        FrameLayout frameLayout = new FrameLayout(TestActivity.this);
            FrameLayout frameLayout = (FrameLayout) LayoutInflater.from(TestActivity.this).inflate(R.layout.item, parent, false);
            ;
            //                        frameLayout.addView(view);
            return new MainViewHolder(frameLayout);
        }

        @Override
        public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
            FrameLayout.LayoutParams layoutParams = new FrameLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 300);
            layoutParams.height = (int) (200 + (position % 15) * 10);
            holder.itemView.findViewById(R.id.title).setLayoutParams(layoutParams);
            if (position == 30) {
                StaggeredGridLayoutManager.LayoutParams lp = new StaggeredGridLayoutManager.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
                lp.setFullSpan(true);
                holder.itemView.setLayoutParams(lp);
            } else {
                ViewGroup.LayoutParams lp = holder.itemView.getLayoutParams();
                if (lp instanceof StaggeredGridLayoutManager.LayoutParams) {
                    ((StaggeredGridLayoutManager.LayoutParams) lp).setFullSpan(false);
                }
            }
            ((TextView) holder.itemView.findViewById(R.id.title)).setText(Integer.toString(position));
        }

        @Override
        public int getItemCount() {
            return 60;
        }
    });
}

Example 69 with LayoutManager

use of android.support.v7.widget.RecyclerView.LayoutManager in project vlayout by alibaba.

the class VLayoutActivity method onCreate.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main_activity);
    mFirstText = (TextView) findViewById(R.id.first);
    mLastText = (TextView) findViewById(R.id.last);
    mCountText = (TextView) findViewById(R.id.count);
    mTotalOffsetText = (TextView) findViewById(R.id.total_offset);
    final RecyclerView recyclerView = (RecyclerView) findViewById(R.id.main_view);
    findViewById(R.id.jump).setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            EditText position = (EditText) findViewById(R.id.position);
            if (!TextUtils.isEmpty(position.getText())) {
                try {
                    int pos = Integer.parseInt(position.getText().toString());
                    recyclerView.scrollToPosition(pos);
                } catch (Exception e) {
                    Log.e("VlayoutActivity", e.getMessage(), e);
                }
            } else {
                recyclerView.requestLayout();
            }
        }
    });
    final VirtualLayoutManager layoutManager = new VirtualLayoutManager(this);
    recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {

        @Override
        public void onScrollStateChanged(RecyclerView recyclerView, int scrollState) {
        }

        @Override
        public void onScrolled(RecyclerView recyclerView, int i, int i2) {
            mFirstText.setText("First: " + layoutManager.findFirstVisibleItemPosition());
            mLastText.setText("Existing: " + MainViewHolder.existing + " Created: " + MainViewHolder.createdTimes);
            mCountText.setText("Count: " + recyclerView.getChildCount());
            mTotalOffsetText.setText("Total Offset: " + layoutManager.getOffsetToStart());
        }
    });
    recyclerView.setLayoutManager(layoutManager);
    // layoutManager.setReverseLayout(true);
    RecyclerView.ItemDecoration itemDecoration = new RecyclerView.ItemDecoration() {

        public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
            int position = ((LayoutParams) view.getLayoutParams()).getViewPosition();
            outRect.set(4, 4, 4, 4);
        }
    };
    final RecyclerView.RecycledViewPool viewPool = new RecyclerView.RecycledViewPool();
    recyclerView.setRecycledViewPool(viewPool);
    // recyclerView.addItemDecoration(itemDecoration);
    viewPool.setMaxRecycledViews(0, 20);
    final DelegateAdapter delegateAdapter = new DelegateAdapter(layoutManager, true);
    recyclerView.setAdapter(delegateAdapter);
    List<DelegateAdapter.Adapter> adapters = new LinkedList<>();
    if (BANNER_LAYOUT) {
        adapters.add(new SubAdapter(this, new LinearLayoutHelper(), 1) {

            @Override
            public void onViewRecycled(MainViewHolder holder) {
                if (holder.itemView instanceof ViewPager) {
                    ((ViewPager) holder.itemView).setAdapter(null);
                }
            }

            @Override
            public MainViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                if (viewType == 1)
                    return new MainViewHolder(LayoutInflater.from(VLayoutActivity.this).inflate(R.layout.view_pager, parent, false));
                return super.onCreateViewHolder(parent, viewType);
            }

            @Override
            public int getItemViewType(int position) {
                return 1;
            }

            @Override
            protected void onBindViewHolderWithOffset(MainViewHolder holder, int position, int offsetTotal) {
            }

            @Override
            public void onBindViewHolder(MainViewHolder holder, int position) {
                if (holder.itemView instanceof ViewPager) {
                    ViewPager viewPager = (ViewPager) holder.itemView;
                    viewPager.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 200));
                    // from position to get adapter
                    viewPager.setAdapter(new PagerAdapter(this, viewPool));
                }
            }
        });
    }
    if (FLOAT_LAYOUT) {
        FloatLayoutHelper layoutHelper = new FloatLayoutHelper();
        layoutHelper.setAlignType(FixLayoutHelper.BOTTOM_RIGHT);
        layoutHelper.setDefaultLocation(100, 400);
        LayoutParams layoutParams = new LayoutParams(150, 150);
        adapters.add(new SubAdapter(this, layoutHelper, 1, layoutParams));
    }
    if (LINEAR_LAYOUT) {
        LinearLayoutHelper layoutHelper1 = new LinearLayoutHelper();
        layoutHelper1.setAspectRatio(2.0f);
        LinearLayoutHelper layoutHelper2 = new LinearLayoutHelper();
        layoutHelper2.setAspectRatio(4.0f);
        layoutHelper2.setDividerHeight(10);
        layoutHelper2.setMargin(10, 30, 10, 10);
        layoutHelper2.setPadding(10, 30, 10, 10);
        layoutHelper2.setBgColor(0xFFF5A623);
        adapters.add(new SubAdapter(this, layoutHelper1, 1));
        adapters.add(new SubAdapter(this, layoutHelper2, 6) {

            @Override
            public void onBindViewHolder(MainViewHolder holder, int position) {
                if (position % 2 == 0) {
                    LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 300);
                    layoutParams.mAspectRatio = 5;
                    holder.itemView.setLayoutParams(layoutParams);
                }
            }
        });
    }
    if (STICKY_LAYOUT) {
        StickyLayoutHelper layoutHelper = new StickyLayoutHelper();
        layoutHelper.setOffset(100);
        layoutHelper.setAspectRatio(4);
        adapters.add(new SubAdapter(this, layoutHelper, 1, new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 100)));
    }
    if (SINGLE_LAYOUT) {
        SingleLayoutHelper layoutHelper = new SingleLayoutHelper();
        layoutHelper.setBgColor(Color.rgb(135, 225, 90));
        layoutHelper.setAspectRatio(4);
        layoutHelper.setMargin(10, 20, 10, 20);
        layoutHelper.setPadding(10, 10, 10, 10);
        adapters.add(new SubAdapter(this, layoutHelper, 1, new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 100)));
    }
    if (COLUMN_LAYOUT) {
        ColumnLayoutHelper layoutHelper = new ColumnLayoutHelper();
        layoutHelper.setBgColor(0xff00f0f0);
        layoutHelper.setWeights(new float[] { 40.0f, Float.NaN, 40 });
        adapters.add(new SubAdapter(this, layoutHelper, 5) {

            @Override
            public void onBindViewHolder(MainViewHolder holder, int position) {
                if (position == 0) {
                    LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 300);
                    layoutParams.mAspectRatio = 4;
                    holder.itemView.setLayoutParams(layoutParams);
                }
            }
        });
    }
    if (ONEN_LAYOUT) {
        OnePlusNLayoutHelper helper = new OnePlusNLayoutHelper();
        helper.setBgColor(0xff876384);
        helper.setAspectRatio(4.0f);
        helper.setColWeights(new float[] { 40f, 45f });
        helper.setMargin(10, 20, 10, 20);
        helper.setPadding(10, 10, 10, 10);
        adapters.add(new SubAdapter(this, helper, 2));
    }
    if (ONEN_LAYOUT) {
        OnePlusNLayoutHelper helper = new OnePlusNLayoutHelper();
        helper.setBgColor(0xffef8ba3);
        helper.setAspectRatio(2.0f);
        helper.setColWeights(new float[] { 40f });
        helper.setRowWeight(30f);
        helper.setMargin(10, 20, 10, 20);
        helper.setPadding(10, 10, 10, 10);
        adapters.add(new SubAdapter(this, helper, 4) {

            @Override
            public void onBindViewHolder(MainViewHolder holder, int position) {
                super.onBindViewHolder(holder, position);
                LayoutParams lp = (LayoutParams) holder.itemView.getLayoutParams();
                if (position == 0) {
                    lp.rightMargin = 1;
                } else if (position == 1) {
                } else if (position == 2) {
                    lp.topMargin = 1;
                    lp.rightMargin = 1;
                }
            }
        });
    }
    if (ONEN_LAYOUT) {
        adapters.add(new SubAdapter(this, new OnePlusNLayoutHelper(), 0));
        OnePlusNLayoutHelper helper = new OnePlusNLayoutHelper();
        helper.setBgColor(0xff87e543);
        helper.setAspectRatio(1.8f);
        helper.setColWeights(new float[] { 33.33f, 50f, 40f });
        helper.setMargin(10, 20, 10, 20);
        helper.setPadding(10, 10, 10, 10);
        LayoutParams lp = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);
        adapters.add(new SubAdapter(this, helper, 3, lp) {

            @Override
            public void onBindViewHolder(MainViewHolder holder, int position) {
                super.onBindViewHolder(holder, position);
                LayoutParams lp = (LayoutParams) holder.itemView.getLayoutParams();
                if (position == 0) {
                    lp.rightMargin = 1;
                }
            }
        });
    }
    if (COLUMN_LAYOUT) {
        adapters.add(new SubAdapter(this, new ColumnLayoutHelper(), 0));
        adapters.add(new SubAdapter(this, new ColumnLayoutHelper(), 4));
    }
    if (FIX_LAYOUT) {
        FixLayoutHelper layoutHelper = new FixLayoutHelper(10, 10);
        adapters.add(new SubAdapter(this, layoutHelper, 0));
        layoutHelper = new FixLayoutHelper(FixLayoutHelper.TOP_RIGHT, 20, 20);
        adapters.add(new SubAdapter(this, layoutHelper, 1) {

            @Override
            public void onBindViewHolder(MainViewHolder holder, int position) {
                super.onBindViewHolder(holder, position);
                LayoutParams layoutParams = new LayoutParams(200, 200);
                holder.itemView.setLayoutParams(layoutParams);
            }
        });
    }
    if (STICKY_LAYOUT) {
        StickyLayoutHelper layoutHelper = new StickyLayoutHelper(false);
        adapters.add(new SubAdapter(this, layoutHelper, 0));
        layoutHelper = new StickyLayoutHelper(false);
        layoutHelper.setOffset(100);
        adapters.add(new SubAdapter(this, layoutHelper, 1, new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 100)));
    }
    if (GRID_LAYOUT) {
        GridLayoutHelper layoutHelper = new GridLayoutHelper(2);
        layoutHelper.setMargin(7, 0, 7, 0);
        layoutHelper.setWeights(new float[] { 46.665f });
        layoutHelper.setHGap(3);
        adapters.add(new SubAdapter(this, layoutHelper, 2));
        layoutHelper = new GridLayoutHelper(4);
        layoutHelper.setWeights(new float[] { 20f, 26.665f });
        layoutHelper.setMargin(7, 0, 7, 0);
        layoutHelper.setHGap(3);
        adapters.add(new SubAdapter(this, layoutHelper, 8));
    }
    if (GRID_LAYOUT) {
        adapters.add(new SubAdapter(this, new GridLayoutHelper(4), 0));
        GridLayoutHelper helper = new GridLayoutHelper(4);
        helper.setAspectRatio(4f);
        //helper.setColWeights(new float[]{40, 20, 30, 30});
        // helper.setMargin(0, 10, 0, 10);
        helper.setGap(10);
        adapters.add(new SubAdapter(this, helper, 80) {

            @Override
            public void onBindViewHolder(MainViewHolder holder, int position) {
                super.onBindViewHolder(holder, position);
                LayoutParams lp = (LayoutParams) holder.itemView.getLayoutParams();
            // lp.bottomMargin = 1;
            // lp.rightMargin = 1;
            }
        });
    }
    if (FIX_LAYOUT) {
        adapters.add(new SubAdapter(this, new ScrollFixLayoutHelper(20, 20), 1) {

            @Override
            public void onBindViewHolder(MainViewHolder holder, int position) {
                super.onBindViewHolder(holder, position);
                LayoutParams layoutParams = new LayoutParams(200, 200);
                holder.itemView.setLayoutParams(layoutParams);
            }
        });
    }
    if (LINEAR_LAYOUT)
        adapters.add(new SubAdapter(this, new LinearLayoutHelper(), 10));
    if (GRID_LAYOUT) {
        GridLayoutHelper helper = new GridLayoutHelper(3);
        helper.setMargin(0, 10, 0, 10);
        adapters.add(new SubAdapter(this, helper, 3));
    }
    if (STAGGER_LAYOUT) {
        // adapters.add(new SubAdapter(this, new StaggeredGridLayoutHelper(2, 0), 0));
        final StaggeredGridLayoutHelper helper = new StaggeredGridLayoutHelper(2, 10);
        helper.setMargin(20, 10, 10, 10);
        helper.setPadding(10, 10, 20, 10);
        helper.setBgColor(0xFF86345A);
        adapters.add(new SubAdapter(this, helper, 27) {

            @Override
            public void onBindViewHolder(MainViewHolder holder, int position) {
                super.onBindViewHolder(holder, position);
                LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 200);
                if (position % 2 == 0) {
                    layoutParams.mAspectRatio = 1.0f;
                } else {
                    layoutParams.height = 340 + position % 7 * 20;
                }
                holder.itemView.setLayoutParams(layoutParams);
            }
        });
    }
    if (COLUMN_LAYOUT) {
    // adapters.add(new SubAdapter(this, new ColumnLayoutHelper(), 3));
    }
    if (GRID_LAYOUT) {
    // adapters.add(new SubAdapter(this, new GridLayoutHelper(4), 24));
    }
    delegateAdapter.setAdapters(adapters);
    final Handler mainHandler = new Handler(Looper.getMainLooper());
    trigger = new Runnable() {

        @Override
        public void run() {
            // recyclerView.scrollToPosition(22);
            // recyclerView.getAdapter().notifyDataSetChanged();
            recyclerView.requestLayout();
        // mainHandler.postDelayed(trigger, 1000);
        }
    };
    mainHandler.postDelayed(trigger, 1000);
}

Example 70 with LayoutManager

use of android.support.v7.widget.RecyclerView.LayoutManager in project vlayout by alibaba.

the class LinearLayoutHelper method layoutViews.

/**
     * In {@link LinearLayoutHelper}, each iteration only consume one item,
     * so it can let parent LayoutManager to decide whether the next item is in the range of this helper
     */
@Override
public void layoutViews(RecyclerView.Recycler recycler, RecyclerView.State state, VirtualLayoutManager.LayoutStateWrapper layoutState, LayoutChunkResult result, LayoutManagerHelper helper) {
    // reach the end of this layout
    if (isOutOfRange(layoutState.getCurrentPosition())) {
        return;
    }
    int currentPosition = layoutState.getCurrentPosition();
    // find corresponding layout container
    View view = nextView(recycler, layoutState, helper, result);
    if (view == null) {
        return;
    }
    VirtualLayoutManager.LayoutParams params = (VirtualLayoutManager.LayoutParams) view.getLayoutParams();
    final boolean layoutInVertical = helper.getOrientation() == VERTICAL;
    int startSpace = 0, endSpace = 0, gap = 0;
    boolean isLayoutEnd = layoutState.getLayoutDirection() == VirtualLayoutManager.LayoutStateWrapper.LAYOUT_END;
    boolean isStartLine = isLayoutEnd ? currentPosition == getRange().getLower().intValue() : currentPosition == getRange().getUpper().intValue();
    boolean isEndLine = isLayoutEnd ? currentPosition == getRange().getUpper().intValue() : currentPosition == getRange().getLower().intValue();
    if (isStartLine) {
        startSpace = layoutInVertical ? (isLayoutEnd ? mMarginTop + mPaddingTop : mMarginBottom + mPaddingBottom) : (isLayoutEnd ? mMarginLeft + mPaddingLeft : mMarginRight + mPaddingRight);
    }
    if (isEndLine) {
        endSpace = layoutInVertical ? (isLayoutEnd ? mMarginBottom + mPaddingBottom : mMarginTop + mPaddingTop) : (isLayoutEnd ? mMarginRight + mPaddingRight : mMarginLeft + mPaddingLeft);
    }
    if (!isStartLine) {
        gap = mDividerHeight;
    }
    final int widthSize = helper.getContentWidth() - helper.getPaddingLeft() - helper.getPaddingRight() - getHorizontalMargin() - getHorizontalPadding();
    int widthSpec = helper.getChildMeasureSpec(widthSize, params.width, !layoutInVertical);
    int heightSpec;
    float viewAspectRatio = params.mAspectRatio;
    if (!Float.isNaN(viewAspectRatio) && viewAspectRatio > 0) {
        heightSpec = View.MeasureSpec.makeMeasureSpec((int) (widthSize / viewAspectRatio + 0.5f), View.MeasureSpec.EXACTLY);
    } else if (!Float.isNaN(mAspectRatio) && mAspectRatio > 0) {
        heightSpec = View.MeasureSpec.makeMeasureSpec((int) (widthSize / mAspectRatio + 0.5), View.MeasureSpec.EXACTLY);
    } else {
        heightSpec = helper.getChildMeasureSpec(helper.getContentHeight() - helper.getPaddingTop() - helper.getPaddingBottom() - getVerticalMargin() - getVerticalPadding(), params.height, layoutInVertical);
    }
    helper.measureChild(view, widthSpec, heightSpec);
    OrientationHelper orientationHelper = helper.getMainOrientationHelper();
    result.mConsumed = orientationHelper.getDecoratedMeasurement(view) + startSpace + endSpace + gap;
    int left, top, right, bottom;
    if (helper.getOrientation() == VERTICAL) {
        // not support RTL now
        if (helper.isDoLayoutRTL()) {
            right = helper.getContentWidth() - helper.getPaddingRight() - mMarginRight - mPaddingRight;
            left = right - orientationHelper.getDecoratedMeasurementInOther(view);
        } else {
            left = helper.getPaddingLeft() + mMarginLeft + mPaddingLeft;
            right = left + orientationHelper.getDecoratedMeasurementInOther(view);
        }
        // whether this layout pass is layout to start or to end
        if (layoutState.getLayoutDirection() == VirtualLayoutManager.LayoutStateWrapper.LAYOUT_START) {
            // fill start, from bottom to top
            bottom = layoutState.getOffset() - startSpace - (isStartLine ? 0 : mDividerHeight);
            top = bottom - orientationHelper.getDecoratedMeasurement(view);
        } else {
            // fill end, from top to bottom
            top = layoutState.getOffset() + startSpace + (isStartLine ? 0 : mDividerHeight);
            bottom = top + orientationHelper.getDecoratedMeasurement(view);
        }
    } else {
        top = helper.getPaddingTop() + mMarginTop + mPaddingTop;
        bottom = top + orientationHelper.getDecoratedMeasurementInOther(view);
        if (layoutState.getLayoutDirection() == VirtualLayoutManager.LayoutStateWrapper.LAYOUT_START) {
            // fill left, from right to left
            right = layoutState.getOffset() - startSpace - (isStartLine ? 0 : mDividerHeight);
            left = right - orientationHelper.getDecoratedMeasurement(view);
        } else {
            // fill right, from left to right
            left = layoutState.getOffset() + startSpace + (isStartLine ? 0 : mDividerHeight);
            right = left + orientationHelper.getDecoratedMeasurement(view);
        }
    }
    // We calculate everything with View's bounding box (which includes decor and margins)
    // To calculate correct layout position, we subtract margins.
    layoutChild(view, left, top, right, bottom, helper);
    if (DEBUG) {
        Log.d(TAG, "laid out child at position " + helper.getPosition(view) + ", with l:" + (left + params.leftMargin) + ", t:" + (top + params.topMargin) + ", r:" + (right - params.rightMargin) + ", b:" + (bottom - params.bottomMargin));
    }
    handleStateOnResult(result, view);
}