Example usage for java.lang Float MAX

Introduction

In this page you can find the example usage for java.lang Float MAX_VALUE.

Prototype

float MAX_VALUE

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Document

A constant holding the largest positive finite value of type float , (2-2^-23)·2¹²⁷.

Usage

From source file:com.kiguruming.loopviewpager.ViewPager.java

void calculatePageOffsets(ItemInfo curItem, int curIndex, ItemInfo oldCurInfo) {
    final int N = mAdapter.getCount();
    final int width = getClientWidth();
    final float marginOffset = width > 0 ? (float) mPageMargin / width : 0;
    // Fix up offsets for later layout.
    if (oldCurInfo != null) {
        final int oldCurPosition = oldCurInfo.position;
        // Base offsets off of oldCurInfo.
        if (oldCurPosition < curItem.position) {
            int itemIndex = 0;
            ItemInfo ii = null;/* w w  w.  ja  va  2 s.  c o  m*/
            float offset = oldCurInfo.offset + oldCurInfo.widthFactor + marginOffset;
            for (int pos = oldCurPosition + 1; pos <= curItem.position && itemIndex < mItems.size(); pos++) {
                ii = mItems.get(itemIndex);
                while (pos > ii.position && itemIndex < mItems.size() - 1) {
                    itemIndex++;
                    ii = mItems.get(itemIndex);
                }
                while (pos < ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset += mAdapter.getPageWidth(pos) + marginOffset;
                    pos++;
                }
                ii.offset = offset;
                offset += ii.widthFactor + marginOffset;
            }
        } else if (oldCurPosition > curItem.position) {
            int itemIndex = mItems.size() - 1;
            ItemInfo ii = null;
            float offset = oldCurInfo.offset;
            for (int pos = oldCurPosition - 1; pos >= curItem.position && itemIndex >= 0; pos--) {
                ii = mItems.get(itemIndex);
                while (pos < ii.position && itemIndex > 0) {
                    itemIndex--;
                    ii = mItems.get(itemIndex);
                }
                while (pos > ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset -= mAdapter.getPageWidth(pos) + marginOffset;
                    pos--;
                }
                offset -= ii.widthFactor + marginOffset;
                ii.offset = offset;
            }
        }
    }

    // Base all offsets off of curItem.
    final int itemCount = mItems.size();
    float offset = curItem.offset;
    int pos = curItem.position - 1;
    mFirstOffset = curItem.position == 0 ? curItem.offset : -Float.MAX_VALUE;
    mLastOffset = curItem.position == N - 1 ? curItem.offset + curItem.widthFactor - 1 : Float.MAX_VALUE;
    // Previous pages
    for (int i = curIndex - 1; i >= 0; i--, pos--) {
        final ItemInfo ii = mItems.get(i);
        while (pos > ii.position) {
            offset -= mAdapter.getPageWidth(pos--) + marginOffset;
        }
        offset -= ii.widthFactor + marginOffset;
        ii.offset = offset;
        if (ii.position == 0)
            mFirstOffset = offset;
    }
    offset = curItem.offset + curItem.widthFactor + marginOffset;
    pos = curItem.position + 1;
    // Next pages
    for (int i = curIndex + 1; i < itemCount; i++, pos++) {
        final ItemInfo ii = mItems.get(i);
        while (pos < ii.position) {
            offset += mAdapter.getPageWidth(pos++) + marginOffset;
        }
        if (ii.position == N - 1) {
            mLastOffset = offset + ii.widthFactor - 1;
        }
        ii.offset = offset;
        offset += ii.widthFactor + marginOffset;
    }

    mNeedCalculatePageOffsets = false;
}

From source file:com.autoscrollloopviewpager.widget.LoopViewPager.java

private void calculatePageOffsets(ItemInfo curItem, int curIndex, ItemInfo oldCurInfo) {
    final int N = mAdapter.getCount();
    final int width = getClientWidth();
    final float marginOffset = width > 0 ? (float) mPageMargin / width : 0;
    // Fix up offsets for later layout.
    if (oldCurInfo != null) {
        final int oldCurPosition = oldCurInfo.position;
        // Base offsets off of oldCurInfo.
        if (oldCurPosition < curItem.position) {
            int itemIndex = 0;
            ItemInfo ii = null;/* ww  w .  ja  va2  s  .c o  m*/
            float offset = oldCurInfo.offset + oldCurInfo.widthFactor + marginOffset;
            for (int pos = oldCurPosition + 1; pos <= curItem.position && itemIndex < mItems.size(); pos++) {
                ii = mItems.get(itemIndex);
                while (pos > ii.position && itemIndex < mItems.size() - 1) {
                    itemIndex++;
                    ii = mItems.get(itemIndex);
                }
                while (pos < ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset += mAdapter.getPageWidth(pos) + marginOffset;
                    pos++;
                }
                ii.offset = offset;
                offset += ii.widthFactor + marginOffset;
            }
        } else if (oldCurPosition > curItem.position) {
            int itemIndex = mItems.size() - 1;
            ItemInfo ii = null;
            float offset = oldCurInfo.offset;
            for (int pos = oldCurPosition - 1; pos >= curItem.position && itemIndex >= 0; pos--) {
                ii = mItems.get(itemIndex);
                while (pos < ii.position && itemIndex > 0) {
                    itemIndex--;
                    ii = mItems.get(itemIndex);
                }
                while (pos > ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset -= mAdapter.getPageWidth(pos) + marginOffset;
                    pos--;
                }
                offset -= ii.widthFactor + marginOffset;
                ii.offset = offset;
            }
        }
    }

    // Base all offsets off of curItem.
    final int itemCount = mItems.size();
    float offset = curItem.offset;
    int pos = curItem.position - 1;
    mFirstOffset = curItem.position == 0 ? curItem.offset : -Float.MAX_VALUE;
    mLastOffset = curItem.position == N - 1 ? curItem.offset + curItem.widthFactor - 1 : Float.MAX_VALUE;

    // Previous pages
    for (int i = curIndex - 1; i >= 0; i--, pos--) {
        final ItemInfo ii = mItems.get(i);
        while (pos > ii.position) {
            offset -= mAdapter.getPageWidth(pos--) + marginOffset;
        }
        offset -= ii.widthFactor + marginOffset;
        ii.offset = offset;
    }
    offset = curItem.offset + curItem.widthFactor + marginOffset;
    pos = curItem.position + 1;

    // Next pages
    for (int i = curIndex + 1; i < itemCount; i++, pos++) {
        final ItemInfo ii = mItems.get(i);
        while (pos < ii.position) {
            offset += mAdapter.getPageWidth(pos++) + marginOffset;
        }
        if (ii.position == N - 1) {
            mLastOffset = offset + ii.widthFactor - 1;
        }
        ii.offset = offset;
        offset += ii.widthFactor + marginOffset;
    }

    mNeedCalculatePageOffsets = false;
}

From source file:edu.cens.loci.provider.LociDbUtils.java

public LociLocation getPlaceLocationEstimationWithBestAccuracy(long start, long end) {
    LociLocation placeLoc = null;//from   w w w .java 2 s  . c o m

    String[] columns = new String[] { Tracks._ID, Tracks.TIME, Tracks.LATITUDE, Tracks.LONGITUDE,
            Tracks.ALTITUDE, Tracks.SPEED, Tracks.BEARING, Tracks.ACCURACY };

    String selection = Tracks.TIME + ">=" + start + " AND " + Tracks.TIME + " <= " + end;

    final SQLiteDatabase db = mDbHelper.getWritableDatabase();
    Cursor cursor = db.query(Tables.TRACKS, columns, selection, null, null, null, null);

    float minAccuracy = Float.MAX_VALUE;

    if (cursor.moveToFirst()) {
        do {
            if (minAccuracy > cursor.getFloat(cursor.getColumnIndex(Tracks.ACCURACY))) {
                if (placeLoc == null)
                    placeLoc = new LociLocation(LocationManager.GPS_PROVIDER);
                placeLoc.setTime(cursor.getLong(cursor.getColumnIndex(Tracks.TIME)));
                placeLoc.setLatitude(cursor.getDouble(cursor.getColumnIndex(Tracks.LATITUDE)));
                placeLoc.setLongitude(cursor.getDouble(cursor.getColumnIndex(Tracks.LONGITUDE)));
                placeLoc.setAltitude(cursor.getDouble(cursor.getColumnIndex(Tracks.ALTITUDE)));
                placeLoc.setSpeed(cursor.getFloat(cursor.getColumnIndex(Tracks.SPEED)));
                placeLoc.setBearing(cursor.getFloat(cursor.getColumnIndex(Tracks.BEARING)));
                placeLoc.setAccuracy(cursor.getFloat(cursor.getColumnIndex(Tracks.ACCURACY)));
                minAccuracy = placeLoc.getAccuracy();
            }
        } while (cursor.moveToNext());
    }
    cursor.close();
    return placeLoc;
}

From source file:com.ok.utils.widget.ViewPagerModify.java

private void calculatePageOffsets(ItemInfo curItem, int curIndex, ItemInfo oldCurInfo) {
    final int N = mAdapter.getCount();
    final int width = getClientWidth();
    final float marginOffset = width > 0 ? (float) mPageMargin / width : 0;
    // Fix up offsets for later layout.
    if (oldCurInfo != null) {
        final int oldCurPosition = oldCurInfo.position;
        // Base offsets off of oldCurInfo.
        if (oldCurPosition < curItem.position) {
            int itemIndex = 0;
            ItemInfo ii = null;//from  w w  w .  j  a va2 s  .  c o  m
            float offset = oldCurInfo.offset + oldCurInfo.widthFactor + marginOffset;
            for (int pos = oldCurPosition + 1; pos <= curItem.position && itemIndex < mItems.size(); pos++) {
                ii = mItems.get(itemIndex);
                while (pos > ii.position && itemIndex < mItems.size() - 1) {
                    itemIndex++;
                    ii = mItems.get(itemIndex);
                }
                while (pos < ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset += mAdapter.getPageWidth(pos) + marginOffset;
                    pos++;
                }
                ii.offset = offset;
                offset += ii.widthFactor + marginOffset;
            }
        } else if (oldCurPosition > curItem.position) {
            int itemIndex = mItems.size() - 1;
            ItemInfo ii = null;
            float offset = oldCurInfo.offset;
            for (int pos = oldCurPosition - 1; pos >= curItem.position && itemIndex >= 0; pos--) {
                ii = mItems.get(itemIndex);
                while (pos < ii.position && itemIndex > 0) {
                    itemIndex--;
                    ii = mItems.get(itemIndex);
                }
                while (pos > ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset -= mAdapter.getPageWidth(pos) + marginOffset;
                    pos--;
                }
                offset -= ii.widthFactor + marginOffset;
                ii.offset = offset;
            }
        }
    }

    // Base all offsets off of curItem.
    final int itemCount = mItems.size();
    float offset = curItem.offset;
    int pos = curItem.position - 1;
    mFirstOffset = curItem.position == 0 ? curItem.offset : -Float.MAX_VALUE;
    mLastOffset = curItem.position == N - 1 ? curItem.offset + curItem.widthFactor - 1 : Float.MAX_VALUE;
    // Previous pages
    for (int i = curIndex - 1; i >= 0; i--, pos--) {
        final ItemInfo ii = mItems.get(i);
        while (pos > ii.position) {
            offset -= mAdapter.getPageWidth(pos--) + marginOffset;
        }
        offset -= ii.widthFactor + marginOffset;
        ii.offset = offset;
        if (ii.position == 0)
            mFirstOffset = offset;
    }
    offset = curItem.offset + curItem.widthFactor + marginOffset;
    pos = curItem.position + 1;
    // Next pages
    for (int i = curIndex + 1; i < itemCount; i++, pos++) {
        final ItemInfo ii = mItems.get(i);
        while (pos < ii.position) {
            offset += mAdapter.getPageWidth(pos++) + marginOffset;
        }
        if (ii.position == N - 1) {
            mLastOffset = offset + ii.widthFactor - 1;
        }
        ii.offset = offset;
        offset += ii.widthFactor + marginOffset;
    }
}

From source file:cn.bmob.otaku.number_z.view.imagepager.PinchImageViewPager.java

private void calculatePageOffsets(ItemInfo curItem, int curIndex, ItemInfo oldCurInfo) {
    final int N = mAdapter.getCount();
    final int width = getClientWidth();
    final float marginOffset = width > 0 ? (float) mPageMargin / width : 0;
    // Fix up offsets for later layout.
    if (oldCurInfo != null) {
        final int oldCurPosition = oldCurInfo.position;
        // Base offsets off of oldCurInfo.
        if (oldCurPosition < curItem.position) {
            int itemIndex = 0;
            ItemInfo ii = null;/*from  www  .  ja va  2 s.co m*/
            float offset = oldCurInfo.offset + oldCurInfo.widthFactor + marginOffset;
            for (int pos = oldCurPosition + 1; pos <= curItem.position && itemIndex < mItems.size(); pos++) {
                ii = mItems.get(itemIndex);
                while (pos > ii.position && itemIndex < mItems.size() - 1) {
                    itemIndex++;
                    ii = mItems.get(itemIndex);
                }
                while (pos < ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset += mAdapter.getPageWidth(pos) + marginOffset;
                    pos++;
                }
                ii.offset = offset;
                offset += ii.widthFactor + marginOffset;
            }
        } else if (oldCurPosition > curItem.position) {
            int itemIndex = mItems.size() - 1;
            ItemInfo ii = null;
            float offset = oldCurInfo.offset;
            for (int pos = oldCurPosition - 1; pos >= curItem.position && itemIndex >= 0; pos--) {
                ii = mItems.get(itemIndex);
                while (pos < ii.position && itemIndex > 0) {
                    itemIndex--;
                    ii = mItems.get(itemIndex);
                }
                while (pos > ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset -= mAdapter.getPageWidth(pos) + marginOffset;
                    pos--;
                }
                offset -= ii.widthFactor + marginOffset;
                ii.offset = offset;
            }
        }
    }

    // Base all offsets off of curItem.
    final int itemCount = mItems.size();
    float offset = curItem.offset;
    int pos = curItem.position - 1;
    mFirstOffset = curItem.position == 0 ? curItem.offset : -Float.MAX_VALUE;
    mLastOffset = curItem.position == N - 1 ? curItem.offset + curItem.widthFactor - 1 : Float.MAX_VALUE;
    // Previous pages
    for (int i = curIndex - 1; i >= 0; i--, pos--) {
        final ItemInfo ii = mItems.get(i);
        while (pos > ii.position) {
            offset -= mAdapter.getPageWidth(pos--) + marginOffset;
        }
        offset -= ii.widthFactor + marginOffset;
        ii.offset = offset;
        if (ii.position == 0)
            mFirstOffset = offset;
    }
    offset = curItem.offset + curItem.widthFactor + marginOffset;
    pos = curItem.position + 1;
    // Next pages
    for (int i = curIndex + 1; i < itemCount; i++, pos++) {
        final ItemInfo ii = mItems.get(i);
        while (pos < ii.position) {
            offset += mAdapter.getPageWidth(pos++) + marginOffset;
        }
        if (ii.position == N - 1) {
            mLastOffset = offset + ii.widthFactor - 1;
        }
        ii.offset = offset;
        offset += ii.widthFactor + marginOffset;
    }

    mNeedCalculatePageOffsets = false;
}

From source file:eu.kanade.tachiyomi.ui.reader.viewer.pager.vertical.VerticalViewPagerImpl.java

private void calculatePageOffsets(ItemInfo curItem, int curIndex, ItemInfo oldCurInfo) {
    final int N = mAdapter.getCount();
    final int height = getClientHeight();
    final float marginOffset = height > 0 ? (float) mPageMargin / height : 0;
    // Fix up offsets for later layout.
    if (oldCurInfo != null) {
        final int oldCurPosition = oldCurInfo.position;
        // Base offsets off of oldCurInfo.
        if (oldCurPosition < curItem.position) {
            int itemIndex = 0;
            ItemInfo ii;/*from   ww  w  . j  a  v a  2 s  . co m*/
            float offset = oldCurInfo.offset + oldCurInfo.heightFactor + marginOffset;
            for (int pos = oldCurPosition + 1; pos <= curItem.position && itemIndex < mItems.size(); pos++) {
                ii = mItems.get(itemIndex);
                while (pos > ii.position && itemIndex < mItems.size() - 1) {
                    itemIndex++;
                    ii = mItems.get(itemIndex);
                }
                while (pos < ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset += mAdapter.getPageWidth(pos) + marginOffset;
                    pos++;
                }
                ii.offset = offset;
                offset += ii.heightFactor + marginOffset;
            }
        } else if (oldCurPosition > curItem.position) {
            int itemIndex = mItems.size() - 1;
            ItemInfo ii;
            float offset = oldCurInfo.offset;
            for (int pos = oldCurPosition - 1; pos >= curItem.position && itemIndex >= 0; pos--) {
                ii = mItems.get(itemIndex);
                while (pos < ii.position && itemIndex > 0) {
                    itemIndex--;
                    ii = mItems.get(itemIndex);
                }
                while (pos > ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset -= mAdapter.getPageWidth(pos) + marginOffset;
                    pos--;
                }
                offset -= ii.heightFactor + marginOffset;
                ii.offset = offset;
            }
        }
    }

    // Base all offsets off of curItem.
    final int itemCount = mItems.size();
    float offset = curItem.offset;
    int pos = curItem.position - 1;
    mFirstOffset = curItem.position == 0 ? curItem.offset : -Float.MAX_VALUE;
    mLastOffset = curItem.position == N - 1 ? curItem.offset + curItem.heightFactor - 1 : Float.MAX_VALUE;
    // Previous pages
    for (int i = curIndex - 1; i >= 0; i--, pos--) {
        final ItemInfo ii = mItems.get(i);
        while (pos > ii.position) {
            offset -= mAdapter.getPageWidth(pos--) + marginOffset;
        }
        offset -= ii.heightFactor + marginOffset;
        ii.offset = offset;
        if (ii.position == 0)
            mFirstOffset = offset;
    }
    offset = curItem.offset + curItem.heightFactor + marginOffset;
    pos = curItem.position + 1;
    // Next pages
    for (int i = curIndex + 1; i < itemCount; i++, pos++) {
        final ItemInfo ii = mItems.get(i);
        while (pos < ii.position) {
            offset += mAdapter.getPageWidth(pos++) + marginOffset;
        }
        if (ii.position == N - 1) {
            mLastOffset = offset + ii.heightFactor - 1;
        }
        ii.offset = offset;
        offset += ii.heightFactor + marginOffset;
    }

    mNeedCalculatePageOffsets = false;
}

From source file:odcplot.OdcPlot.java

/**
 * For binary input files from our frame reader set up the input stream
 * @return number of entries to read// ww  w.ja  v  a  2  s  .  c  o m
 * @throws WebUtilException 
 */
private long setupFileReads() throws WebUtilException {
    setProgress("Scan input file for min/max GPS times.");
    File inFile = new File(infilename);
    long siz = inFile.length() / (Float.SIZE / 8) / 2; // convert bytes to # entries (time, val)
    if (!inFile.canRead()) {
        throw new WebUtilException("Can't open " + infilename + " for reading");
    }
    try {
        inStream = new SwappedDataInputStream(new FileInputStream(inFile));
        float minTime = Float.MAX_VALUE;
        float maxTime = -Float.MAX_VALUE;

        setProgress("Searhing for min/max time in input file.");
        int opct = 0;
        for (int i = 0; i < siz; i++) {
            int pct = (int) (100 * i / siz);
            if (pct > opct) {
                setProgress(pct, 100);
                opct = pct;
            }
            Float t = inStream.readFloat();
            Float d = inStream.readFloat();
            minTime = Math.min(minTime, t);
            maxTime = Math.max(maxTime, t);
        }
        startGPS = (int) (minTime * 24 * 3600);
        duration = (int) ((maxTime - minTime) * 24 * 3600);
        inStream.close();
        inStream = new SwappedDataInputStream(new FileInputStream(inFile));
    } catch (IOException ex) {
        throw new WebUtilException("Can't open " + infilename + " for reading");
    }

    return siz;
}

From source file:com.example.myronlg.cardviewpagerdemo.CopyViewPager.java

private void calculatePageOffsets(ItemInfo curItem, int curIndex, ItemInfo oldCurInfo) {
    final int N = mAdapter.getCount();
    final int width = getClientWidth();
    final float marginOffset = width > 0 ? (float) mPageMargin / width : 0;
    // Fix up offsets for later layout.
    if (oldCurInfo != null) {
        final int oldCurPosition = oldCurInfo.position;
        // Base offsets off of oldCurInfo.
        if (oldCurPosition < curItem.position) {
            int itemIndex = 0;
            ItemInfo ii = null;/*from w w w .  jav  a2 s.  c  om*/
            float offset = oldCurInfo.offset + oldCurInfo.widthFactor + marginOffset;
            for (int pos = oldCurPosition + 1; pos <= curItem.position && itemIndex < mItems.size(); pos++) {
                ii = mItems.get(itemIndex);
                while (pos > ii.position && itemIndex < mItems.size() - 1) {
                    itemIndex++;
                    ii = mItems.get(itemIndex);
                }
                while (pos < ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset += mAdapter.getPageWidth(pos) + marginOffset;
                    pos++;
                }
                ii.offset = offset;
                offset += ii.widthFactor + marginOffset;
            }
        } else if (oldCurPosition > curItem.position) {
            int itemIndex = mItems.size() - 1;
            ItemInfo ii = null;
            float offset = oldCurInfo.offset;
            for (int pos = oldCurPosition - 1; pos >= curItem.position && itemIndex >= 0; pos--) {
                ii = mItems.get(itemIndex);
                while (pos < ii.position && itemIndex > 0) {
                    itemIndex--;
                    ii = mItems.get(itemIndex);
                }
                while (pos > ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset -= mAdapter.getPageWidth(pos) + marginOffset;
                    pos--;
                }
                offset -= ii.widthFactor + marginOffset;
                ii.offset = offset;
            }
        }
    }

    // Base all offsets off of curItem.
    final int itemCount = mItems.size();
    float offset = curItem.offset;
    int pos = curItem.position - 1;
    mFirstOffset = curItem.position == 0 ? curItem.offset : -Float.MAX_VALUE;
    mLastOffset = curItem.position == N - 1 ? curItem.offset + curItem.widthFactor - 1 : Float.MAX_VALUE;
    // Previous pages
    for (int i = curIndex - 1; i >= 0; i--, pos--) {
        final ItemInfo ii = mItems.get(i);
        while (pos > ii.position) {
            offset -= mAdapter.getPageWidth(pos--) + marginOffset;
        }
        offset -= ii.widthFactor + marginOffset;
        ii.offset = offset;
        if (ii.position == 0)
            mFirstOffset = offset;
    }
    offset = curItem.offset + curItem.widthFactor + marginOffset;
    pos = curItem.position + 1;
    // Next pages
    for (int i = curIndex + 1; i < itemCount; i++, pos++) {
        final ItemInfo ii = mItems.get(i);
        while (pos < ii.position) {
            offset += mAdapter.getPageWidth(pos++) + marginOffset;
        }
        if (ii.position == N - 1) {
            mLastOffset = offset + ii.widthFactor - 1;
        }
        ii.offset = offset;
        offset += ii.widthFactor + marginOffset;
    }

    //        for (int i = 0; i < mItems.size(); i++) {
    //            ItemInfo itemInfo = mItems.get(i);
    //            itemInfo.offset = itemInfo.offset + 0.1F;
    //        }

    mNeedCalculatePageOffsets = false;
}

From source file:ir.ac.ut.widget.ViewPager.java

private void calculatePageOffsets(ItemInfo curItem, int curIndex, ItemInfo oldCurInfo) {
    final int N = mAdapter.getCount();
    final int width = getClientWidth();
    final float marginOffset = width > 0 ? (float) mPageMargin / width : 0;
    // Fix up offsets for later layout.
    if (oldCurInfo != null) {
        final int oldCurPosition = oldCurInfo.position;
        // Base offsets off of oldCurInfo.
        if (oldCurPosition < curItem.position) {
            int itemIndex = 0;
            ItemInfo ii = null;/*from www . j  a va 2 s  . c  o m*/
            float offset = oldCurInfo.offset + oldCurInfo.widthFactor + marginOffset;
            for (int pos = oldCurPosition + 1; pos <= curItem.position && itemIndex < mItems.size(); pos++) {
                ii = mItems.get(itemIndex);
                while (pos > ii.position && itemIndex < mItems.size() - 1) {
                    itemIndex++;
                    ii = mItems.get(itemIndex);
                }
                while (pos < ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset += mAdapter.getPageWidth(pos) + marginOffset;
                    pos++;
                }
                ii.offset = offset;
                offset += ii.widthFactor + marginOffset;
            }
        } else if (oldCurPosition > curItem.position) {
            int itemIndex = mItems.size() - 1;
            ItemInfo ii = null;
            float offset = oldCurInfo.offset;
            for (int pos = oldCurPosition - 1; pos >= curItem.position && itemIndex >= 0; pos--) {
                ii = mItems.get(itemIndex);
                while (pos < ii.position && itemIndex > 0) {
                    itemIndex--;
                    ii = mItems.get(itemIndex);
                }
                while (pos > ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset -= mAdapter.getPageWidth(pos) + marginOffset;
                    pos--;
                }
                offset -= ii.widthFactor + marginOffset;
                ii.offset = offset;
            }
        }
    }

    // Base all offsets off of curItem.
    final int itemCount = mItems.size();
    float offset = curItem.offset;
    int pos = curItem.position - 1;
    mFirstOffset = curItem.position == 0 ? curItem.offset : -Float.MAX_VALUE;
    mLastOffset = curItem.position == N - 1 ? curItem.offset + curItem.widthFactor - 1 : Float.MAX_VALUE;
    // Previous pages
    for (int i = curIndex - 1; i >= 0; i--, pos--) {
        final ItemInfo ii = mItems.get(i);
        while (pos > ii.position) {
            offset -= mAdapter.getPageWidth(pos--) + marginOffset;
        }
        offset -= ii.widthFactor + marginOffset;
        ii.offset = offset;
        if (ii.position == 0) {
            mFirstOffset = offset;
        }
    }
    offset = curItem.offset + curItem.widthFactor + marginOffset;
    pos = curItem.position + 1;
    // Next pages
    for (int i = curIndex + 1; i < itemCount; i++, pos++) {
        final ItemInfo ii = mItems.get(i);
        while (pos < ii.position) {
            offset += mAdapter.getPageWidth(pos++) + marginOffset;
        }
        if (ii.position == N - 1) {
            mLastOffset = offset + ii.widthFactor - 1;
        }
        ii.offset = offset;
        offset += ii.widthFactor + marginOffset;
    }

    mNeedCalculatePageOffsets = false;
}

From source file:cn.trinea.android.common.view.CycleViewPager.java

private void calculatePageOffsets(ItemInfo curItem, int curIndex, ItemInfo oldCurInfo) {
    final int N = mAdapter.getCount();
    final int width = getWidth();
    final float marginOffset = width > 0 ? (float) mPageMargin / width : 0;
    // Fix up offsets for later layout.
    if (oldCurInfo != null) {
        final int oldCurPosition = oldCurInfo.position;
        // Base offsets off of oldCurInfo.
        if (oldCurPosition < curItem.position) {
            int itemIndex = 0;
            ItemInfo ii = null;/*  w  ww .  j a v  a  2s.co m*/
            float offset = oldCurInfo.offset + oldCurInfo.widthFactor + marginOffset;
            for (int pos = oldCurPosition + 1; pos <= curItem.position && itemIndex < mItems.size(); pos++) {
                ii = mItems.get(itemIndex);
                while (pos > ii.position && itemIndex < mItems.size() - 1) {
                    itemIndex++;
                    ii = mItems.get(itemIndex);
                }
                while (pos < ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset += mAdapter.getPageWidth(pos) + marginOffset;
                    pos++;
                }
                ii.offset = offset;
                offset += ii.widthFactor + marginOffset;
            }
        } else if (oldCurPosition > curItem.position) {
            int itemIndex = mItems.size() - 1;
            ItemInfo ii = null;
            float offset = oldCurInfo.offset;
            for (int pos = oldCurPosition - 1; pos >= curItem.position && itemIndex >= 0; pos--) {
                ii = mItems.get(itemIndex);
                while (pos < ii.position && itemIndex > 0) {
                    itemIndex--;
                    ii = mItems.get(itemIndex);
                }
                while (pos > ii.position) {
                    // We don't have an item populated for this,
                    // ask the adapter for an offset.
                    offset -= mAdapter.getPageWidth(pos) + marginOffset;
                    pos--;
                }
                offset -= ii.widthFactor + marginOffset;
                ii.offset = offset;
            }
        }
    }

    // Base all offsets off of curItem.
    final int itemCount = mItems.size();
    float offset = curItem.offset;
    int pos = curItem.position - 1;
    mFirstOffset = curItem.position == 0 ? curItem.offset : -Float.MAX_VALUE;
    mLastOffset = curItem.position == N - 1 ? curItem.offset + curItem.widthFactor - 1 : Float.MAX_VALUE;
    // Previous pages
    for (int i = curIndex - 1; i >= 0; i--, pos--) {
        final ItemInfo ii = mItems.get(i);
        while (pos > ii.position) {
            offset -= mAdapter.getPageWidth(pos--) + marginOffset;
        }
        offset -= ii.widthFactor + marginOffset;
        ii.offset = offset;
        if (ii.position == 0)
            mFirstOffset = offset;
    }
    offset = curItem.offset + curItem.widthFactor + marginOffset;
    pos = curItem.position + 1;
    // Next pages
    for (int i = curIndex + 1; i < itemCount; i++, pos++) {
        final ItemInfo ii = mItems.get(i);
        while (pos < ii.position) {
            offset += mAdapter.getPageWidth(pos++) + marginOffset;
        }
        if (ii.position == N - 1) {
            mLastOffset = offset + ii.widthFactor - 1;
        }
        ii.offset = offset;
        offset += ii.widthFactor + marginOffset;
    }

    mNeedCalculatePageOffsets = false;
}

Example usage for java.lang Float MAX_VALUE

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