Example usage for android.support.v4.view PagerAdapter POSITION_UNCHANGED

Introduction

In this page you can find the example usage for android.support.v4.view PagerAdapter POSITION_UNCHANGED.

Prototype

int POSITION_UNCHANGED

To view the source code for android.support.v4.view PagerAdapter POSITION_UNCHANGED.

Click Source Link

Usage

From source file:com.yao.zhihudaily.tool.LazyViewPager.java

void dataSetChanged() {
    // This method only gets called if our observer is attached, so mAdapter is non-null.
    boolean needPopulate = mItems.size() < 3 && mItems.size() < mAdapter.getCount();
    int newCurrItem = -1;
    for (int i = 0; i < mItems.size(); i++) {
        final ItemInfo ii = mItems.get(i);
        final int newPos = mAdapter.getItemPosition(ii.object);
        if (newPos == PagerAdapter.POSITION_UNCHANGED) {
            continue;
        }/* w  ww . jav a2  s .  co m*/
        if (newPos == PagerAdapter.POSITION_NONE) {
            mItems.remove(i);
            i--;
            mAdapter.destroyItem(this, ii.position, ii.object);
            needPopulate = true;
            if (mCurItem == ii.position) {
                // Keep the current item in the valid range
                newCurrItem = Math.max(0, Math.min(mCurItem, mAdapter.getCount() - 1));
            }
            continue;
        }
        if (ii.position != newPos) {
            if (ii.position == mCurItem) {
                // Our current item changed position. Follow it.
                newCurrItem = newPos;
            }
            ii.position = newPos;
            needPopulate = true;
        }
    }
    Collections.sort(mItems, COMPARATOR);
    if (newCurrItem >= 0) {
        // TODO This currently causes a jump.
        setCurrentItemInternal(newCurrItem, false, true);
        needPopulate = true;
    }
    if (needPopulate) {
        populate();
        requestLayout();
    }
}

---

From source file:bw.com.yunifangstore.view.LazyViewPager.java

void dataSetChanged() {
    // This method only gets called if our observer is attached, so mAdapter is non-null.

    boolean needPopulate = mItems.size() < 3 && mItems.size() < mAdapter.getCount();
    int newCurrItem = -1;

    for (int i = 0; i < mItems.size(); i++) {
        final ItemInfo ii = mItems.get(i);
        final int newPos = mAdapter.getItemPosition(ii.object);

        if (newPos == PagerAdapter.POSITION_UNCHANGED) {
            continue;
        }//from w  ww . ja  v a  2  s.co m

        if (newPos == PagerAdapter.POSITION_NONE) {
            mItems.remove(i);
            i--;
            mAdapter.destroyItem(this, ii.position, ii.object);
            needPopulate = true;

            if (mCurItem == ii.position) {
                // Keep the current item in the valid range
                newCurrItem = Math.max(0, Math.min(mCurItem, mAdapter.getCount() - 1));
            }
            continue;
        }

        if (ii.position != newPos) {
            if (ii.position == mCurItem) {
                // Our current item changed position. Follow it.
                newCurrItem = newPos;
            }

            ii.position = newPos;
            needPopulate = true;
        }
    }

    Collections.sort(mItems, COMPARATOR);

    if (newCurrItem >= 0) {
        // TODO This currently causes a jump.
        setCurrentItemInternal(newCurrItem, false, true);
        needPopulate = true;
    }
    if (needPopulate) {
        populate();
        requestLayout();
    }
}

---

From source file:com.cnpeng.cnpeng_mydemosfrom2016_12.a_12_GetLocalFiles_VP_FM.CustomNoPreLoadViewPager.java

void dataSetChanged() {
    // This method only gets called if our observer is attached, so mAdapter is non-null.  

    boolean needPopulate = mItems.size() < 3 && mItems.size() < mAdapter.getCount();
    int newCurrItem = -1;

    for (int i = 0; i < mItems.size(); i++) {
        final ItemInfo ii = mItems.get(i);
        final int newPos = mAdapter.getItemPosition(ii.object);

        if (newPos == PagerAdapter.POSITION_UNCHANGED) {
            continue;
        }/*from  w  ww . j  a v  a  2s. c  o m*/

        if (newPos == PagerAdapter.POSITION_NONE) {
            mItems.remove(i);
            i--;
            mAdapter.destroyItem(this, ii.position, ii.object);
            needPopulate = true;

            if (mCurItem == ii.position) {
                // Keep the current item in the valid range  
                newCurrItem = Math.max(0, Math.min(mCurItem, mAdapter.getCount() - 1));
            }
            continue;
        }

        if (ii.position != newPos) {
            if (ii.position == mCurItem) {
                // Our current item changed position. Follow it.  
                newCurrItem = newPos;
            }

            ii.position = newPos;
            needPopulate = true;
        }
    }

    Collections.sort(mItems, COMPARATOR);

    if (newCurrItem >= 0) {
        // TODO This currently causes a jump.  
        setCurrentItemInternal(newCurrItem, false, true);
        needPopulate = true;
    }
    if (needPopulate) {
        populate();
        requestLayout();
    }
}

---

From source file:com.icenler.lib.view.LazyViewPager.java

void dataSetChanged() {
    // This method only gets called if our observer is attached, so mAdapter is non-null.

    boolean needPopulate = mItems.size() < 3 && mItems.size() < mAdapter.getCount();
    int newCurrItem = -1;

    for (int i = 0; i < mItems.size(); i++) {
        final ItemInfo ii = mItems.get(i);
        final int newPos = mAdapter.getItemPosition(ii.object);

        if (newPos == PagerAdapter.POSITION_UNCHANGED) {
            continue;
        }//w  w  w. j a  va2  s .  co m

        if (newPos == PagerAdapter.POSITION_NONE) {
            mItems.remove(i);
            i--;
            mAdapter.destroyItem(this, ii.position, ii.object);
            needPopulate = true;

            if (mCurItem == ii.position) {
                // Keep the current item in the valid range
                newCurrItem = Math.max(0, Math.min(mCurItem, mAdapter.getCount() - 1));
            }
            continue;
        }

        if (ii.position != newPos) {
            if (ii.position == mCurItem) {
                // Our current item changed position. Follow it.
                newCurrItem = newPos;
            }

            ii.position = newPos;
            needPopulate = true;
        }
    }

    Collections.sort(mItems, COMPARATOR);

    if (newCurrItem >= 0) {
        // This currently causes a jump.
        setCurrentItemInternal(newCurrItem, false, true);
        needPopulate = true;
    }
    if (needPopulate) {
        populate();
        requestLayout();
    }
}

---

From source file:com.wevalue.view.LazyViewPager.java

void dataSetChanged() {
    // This method only gets called if our observer is attached, so mAdapter
    // is non-null.

    boolean needPopulate = mItems.size() < 3 && mItems.size() < mAdapter.getCount();
    int newCurrItem = -1;

    for (int i = 0; i < mItems.size(); i++) {
        final ItemInfo ii = mItems.get(i);
        final int newPos = mAdapter.getItemPosition(ii.object);

        if (newPos == PagerAdapter.POSITION_UNCHANGED) {
            continue;
        }/*w ww.ja v a  2 s .co  m*/

        if (newPos == PagerAdapter.POSITION_NONE) {
            mItems.remove(i);
            i--;
            mAdapter.destroyItem(this, ii.position, ii.object);
            needPopulate = true;

            if (mCurItem == ii.position) {
                // Keep the current item in the valid range
                newCurrItem = Math.max(0, Math.min(mCurItem, mAdapter.getCount() - 1));
            }
            continue;
        }

        if (ii.position != newPos) {
            if (ii.position == mCurItem) {
                // Our current it-em changed position. Follow it.
                newCurrItem = newPos;
            }

            ii.position = newPos;
            needPopulate = true;
        }
    }

    Collections.sort(mItems, COMPARATOR);

    if (newCurrItem >= 0) {
        // TODO This currently causes a jump.
        setCurrentItemInternal(newCurrItem, false, false);
        needPopulate = true;
    }
    if (needPopulate) {
        populate();
        requestLayout();
    }
}

---

From source file:com.miuhouse.yourcompany.student.view.widget.LazyViewPager.java

void dataSetChanged() {
    // This method only gets called if our observer is attached, so mAdapter
    // is non-null.

    boolean needPopulate = mItems.size() < 3 && mItems.size() < mAdapter.getCount();
    int newCurrItem = -1;

    for (int i = 0; i < mItems.size(); i++) {
        final ItemInfo ii = mItems.get(i);
        final int newPos = mAdapter.getItemPosition(ii.object);

        if (newPos == PagerAdapter.POSITION_UNCHANGED) {
            continue;
        }//from www.  j  a  va 2 s .c  o m

        if (newPos == PagerAdapter.POSITION_NONE) {
            mItems.remove(i);
            i--;
            mAdapter.destroyItem(this, ii.position, ii.object);
            needPopulate = true;

            if (mCurItem == ii.position) {
                // Keep the current item in the valid range
                newCurrItem = Math.max(0, Math.min(mCurItem, mAdapter.getCount() - 1));
            }
            continue;
        }

        if (ii.position != newPos) {
            if (ii.position == mCurItem) {
                // Our current item changed position. Follow it.
                newCurrItem = newPos;
            }

            ii.position = newPos;
            needPopulate = true;
        }
    }

    Collections.sort(mItems, COMPARATOR);

    if (newCurrItem >= 0) {
        setCurrentItemInternal(newCurrItem, false, true);
        needPopulate = true;
    }
    if (needPopulate) {
        populate();
        requestLayout();
    }
}

---

From source file:com.bm.wjsj.View.LazyViewPager.java

void dataSetChanged() {
    // This method only gets called if our observer is attached, so mAdapter
    // is non-null.

    boolean needPopulate = mItems.size() < 3 && mItems.size() < mAdapter.getCount();
    int newCurrItem = -1;

    for (int i = 0; i < mItems.size(); i++) {
        final ItemInfo ii = mItems.get(i);
        final int newPos = mAdapter.getItemPosition(ii.object);

        if (newPos == PagerAdapter.POSITION_UNCHANGED) {
            continue;
        }/* w w w .  j  a v  a  2 s.c  o m*/

        if (newPos == PagerAdapter.POSITION_NONE) {
            mItems.remove(i);
            i--;
            mAdapter.destroyItem(this, ii.position, ii.object);
            needPopulate = true;

            if (mCurItem == ii.position) {
                // Keep the current item in the valid range
                newCurrItem = Math.max(0, Math.min(mCurItem, mAdapter.getCount() - 1));
            }
            continue;
        }

        if (ii.position != newPos) {
            if (ii.position == mCurItem) {
                // Our current item changed position. Follow it.
                newCurrItem = newPos;
            }

            ii.position = newPos;
            needPopulate = true;
        }
    }

    Collections.sort(mItems, COMPARATOR);

    if (newCurrItem >= 0) {
        // TODO This currently causes a jump.
        setCurrentItemInternal(newCurrItem, false, true);
        needPopulate = true;
    }
    if (needPopulate) {
        populate();
        requestLayout();
    }
}

---

From source file:com.baidu.zhuanche.view.LazyViewPager.java

void dataSetChanged() {
    // This method only gets called if our observer is attached, so mAdapter is non-null.

    boolean needPopulate = mItems.size() < 3 && mItems.size() < mAdapter.getCount();
    int newCurrItem = -1;

    boolean isUpdating = false;
    for (int i = 0; i < mItems.size(); i++) {
        final ItemInfo ii = mItems.get(i);
        final int newPos = mAdapter.getItemPosition(ii.object);

        if (newPos == PagerAdapter.POSITION_UNCHANGED) {
            continue;
        }//from w w w .  j  av a  2 s  . co m

        if (newPos == PagerAdapter.POSITION_NONE) {
            mItems.remove(i);
            i--;

            if (!isUpdating) {
                mAdapter.startUpdate(this);
                isUpdating = true;
            }

            mAdapter.destroyItem(this, ii.position, ii.object);
            needPopulate = true;

            if (mCurItem == ii.position) {
                // Keep the current item in the valid range
                newCurrItem = Math.max(0, Math.min(mCurItem, mAdapter.getCount() - 1));
            }
            continue;
        }

        if (ii.position != newPos) {
            if (ii.position == mCurItem) {
                // Our current item changed position. Follow it.
                newCurrItem = newPos;
            }

            ii.position = newPos;
            needPopulate = true;
        }
    }

    if (isUpdating) {
        mAdapter.finishUpdate(this);
    }

    Collections.sort(mItems, COMPARATOR);

    if (newCurrItem >= 0) {
        // TODO This currently causes a jump.
        setCurrentItemInternal(newCurrItem, false, true);
        needPopulate = true;
    }
    if (needPopulate) {
        populate();
        requestLayout();
    }
}

---

From source file:com.chenglong.muscle.ui.LazyViewPager.java

void dataSetChanged() {
    // This method only gets called if our observer is attached, so mAdapter
    // is non-null.
    boolean needPopulate = mItems.size() < 3 && mItems.size() < mAdapter.getCount();
    int newCurrItem = -1;
    boolean isUpdating = false;
    for (int i = 0; i < mItems.size(); i++) {
        final ItemInfo ii = mItems.get(i);
        final int newPos = mAdapter.getItemPosition(ii.object);
        if (newPos == PagerAdapter.POSITION_UNCHANGED) {
            continue;
        }//  ww w  .j a  va 2  s.com
        if (newPos == PagerAdapter.POSITION_NONE) {
            mItems.remove(i);
            i--;
            if (!isUpdating) {
                mAdapter.startUpdate(this);
                isUpdating = true;
            }
            mAdapter.destroyItem(this, ii.position, ii.object);
            needPopulate = true;
            if (mCurItem == ii.position) {
                // Keep the current item in the valid range
                newCurrItem = Math.max(0, Math.min(mCurItem, mAdapter.getCount() - 1));
            }
            continue;
        }
        if (ii.position != newPos) {
            if (ii.position == mCurItem) {
                // Our current item changed position. Follow it.
                newCurrItem = newPos;
            }
            ii.position = newPos;
            needPopulate = true;
        }
    }
    if (isUpdating) {
        mAdapter.finishUpdate(this);
    }
    Collections.sort(mItems, COMPARATOR);
    if (newCurrItem >= 0) {
        // TODO This currently causes a jump.
        setCurrentItemInternal(newCurrItem, false, true);
        needPopulate = true;
    }
    if (needPopulate) {
        populate();
        requestLayout();
    }
}

---

From source file:de.andacaydin.bidirectionalviewpagerlibrary.BiDirectionalViewPager.java

void dataSetChanged() {
    // This method only gets called if our observer is attached, so mAdapter
    // is non-null.

    boolean needPopulate = mItems.isEmpty() && mAdapter.getCount() > 0;
    int newCurrItem = -1;

    for (int i = 0; i < mItems.size(); i++) {
        final ItemInfo ii = mItems.get(i);
        final int newPos = mAdapter.getItemPosition(ii.object);

        if (newPos == PagerAdapter.POSITION_UNCHANGED) {
            continue;
        }//from   w w w .java2  s .c o m

        if (newPos == PagerAdapter.POSITION_NONE) {
            mItems.remove(i);
            i--;
            mAdapter.destroyItem(this, ii.position, ii.object);
            needPopulate = true;

            if (mCurItem == ii.position) {
                // Keep the current item in the valid range
                newCurrItem = Math.max(0, Math.min(mCurItem, mAdapter.getCount() - 1));
            }
            continue;
        }

        if (ii.position != newPos) {
            if (ii.position == mCurItem) {
                // Our current item changed position. Follow it.
                newCurrItem = newPos;
            }

            ii.position = newPos;
            needPopulate = true;
        }
    }

    if (newCurrItem >= 0) {
        // TODO This currently causes a jump.
        setCurrentItemInternal(newCurrItem, true, true);
        needPopulate = true;
    }
    if (needPopulate) {
        populate();
        requestLayout();
    }
}

---

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