Example usage for android.view Gravity LEFT

Introduction

In this page you can find the example usage for android.view Gravity LEFT.

Prototype

int LEFT

To view the source code for android.view Gravity LEFT.

Click Source Link

Document

Push object to the left of its container, not changing its size.

Usage

From source file:android.support.v17.leanback.widget.GridLayoutManager.java

private void layoutChild(int rowIndex, View v, int start, int end, int startSecondary) {
    if (TRACE)/*w w w . ja  va  2 s  .  c om*/
        TraceHelper.beginSection("layoutChild");
    int sizeSecondary = mOrientation == HORIZONTAL ? getDecoratedMeasuredHeightWithMargin(v)
            : getDecoratedMeasuredWidthWithMargin(v);
    if (mFixedRowSizeSecondary > 0) {
        sizeSecondary = Math.min(sizeSecondary, mFixedRowSizeSecondary);
    }
    final int verticalGravity = mGravity & Gravity.VERTICAL_GRAVITY_MASK;
    final int horizontalGravity = (mReverseFlowPrimary || mReverseFlowSecondary)
            ? Gravity.getAbsoluteGravity(mGravity & Gravity.RELATIVE_HORIZONTAL_GRAVITY_MASK,
                    View.LAYOUT_DIRECTION_RTL)
            : mGravity & Gravity.HORIZONTAL_GRAVITY_MASK;
    if (mOrientation == HORIZONTAL && verticalGravity == Gravity.TOP
            || mOrientation == VERTICAL && horizontalGravity == Gravity.LEFT) {
        // do nothing
    } else if (mOrientation == HORIZONTAL && verticalGravity == Gravity.BOTTOM
            || mOrientation == VERTICAL && horizontalGravity == Gravity.RIGHT) {
        startSecondary += getRowSizeSecondary(rowIndex) - sizeSecondary;
    } else if (mOrientation == HORIZONTAL && verticalGravity == Gravity.CENTER_VERTICAL
            || mOrientation == VERTICAL && horizontalGravity == Gravity.CENTER_HORIZONTAL) {
        startSecondary += (getRowSizeSecondary(rowIndex) - sizeSecondary) / 2;
    }
    int left, top, right, bottom;
    if (mOrientation == HORIZONTAL) {
        left = start;
        top = startSecondary;
        right = end;
        bottom = startSecondary + sizeSecondary;
    } else {
        top = start;
        left = startSecondary;
        bottom = end;
        right = startSecondary + sizeSecondary;
    }
    LayoutParams params = (LayoutParams) v.getLayoutParams();
    layoutDecoratedWithMargins(v, left, top, right, bottom);
    // Now super.getDecoratedBoundsWithMargins() includes the extra space for optical bounds,
    // subtracting it from value passed in layoutDecoratedWithMargins(), we can get the optical
    // bounds insets.
    super.getDecoratedBoundsWithMargins(v, sTempRect);
    params.setOpticalInsets(left - sTempRect.left, top - sTempRect.top, sTempRect.right - right,
            sTempRect.bottom - bottom);
    updateChildAlignments(v);
    if (TRACE)
        TraceHelper.endSection();
}

---

From source file:com.benny.openlauncher.widget.SmoothViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    if (isInEditMode())
        return;/*from   w  w  w .  j  ava  2s  .co m*/

    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollX = getScrollX();

    int decorCount = 0;

    // First pass - decor views. We need to do this in two passes so that
    // we have the proper offsets for non-decor views later.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                childLeft += scrollX;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
                decorCount++;
            }
        }
    }

    final int childWidth = width - paddingLeft - paddingRight;
    // Page views. Do this once we have the right padding offsets from above.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            if (!lp.isDecor && (ii = infoForChild(child)) != null) {
                int loff = (int) (childWidth * ii.offset);
                int childLeft = paddingLeft + loff;
                int childTop = paddingTop;
                if (lp.needsMeasure) {
                    // This was added during layout and needs measurement.
                    // Do it now that we know what we're working with.
                    lp.needsMeasure = false;
                    final int widthSpec = MeasureSpec.makeMeasureSpec((int) (childWidth * lp.widthFactor),
                            MeasureSpec.EXACTLY);
                    final int heightSpec = MeasureSpec
                            .makeMeasureSpec((int) (height - paddingTop - paddingBottom), MeasureSpec.EXACTLY);
                    child.measure(widthSpec, heightSpec);
                }
                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }
    mTopPageBounds = paddingTop;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;

    if (mFirstLayout) {
        scrollToItem(mCurItem, false, 0, false);
    }
    mFirstLayout = false;
}

---

From source file:com.irccloud.android.activity.MainActivity.java

@SuppressLint("NewApi")
@Override//  w w  w .  ja v a2s  . c  o m
public void onResume() {
    Crashlytics.log(Log.DEBUG, "IRCCloud", "Resuming app");
    conn = NetworkConnection.getInstance();
    conn.addHandler(this);

    super.onResume();
    SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
    if (prefs.getBoolean("screenlock", false)) {
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    } else {
        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    }

    if (conn.getState() != NetworkConnection.STATE_CONNECTED) {
        if (drawerLayout != null && !NetworkConnection.getInstance().ready) {
            drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
            getSupportActionBar().setHomeButtonEnabled(false);
        }
        sendBtn.setEnabled(false);
        if (Build.VERSION.SDK_INT >= 11)
            sendBtn.setAlpha(0.5f);
        if (conn.config == null) {
            photoBtn.setEnabled(false);
            if (Build.VERSION.SDK_INT >= 11)
                photoBtn.setAlpha(0.5f);
        }
        conn.connect(getSharedPreferences("prefs", 0).getString("session_key", ""));
    } else {
        if (drawerLayout != null) {
            drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
            getSupportActionBar().setHomeButtonEnabled(true);
        }
        if (messageTxt.getText() != null && messageTxt.getText().length() > 0) {
            sendBtn.setEnabled(true);
            if (Build.VERSION.SDK_INT >= 11)
                sendBtn.setAlpha(1);
        }
        photoBtn.setEnabled(true);
        if (Build.VERSION.SDK_INT >= 11)
            photoBtn.setAlpha(1);
    }

    if (server == null || launchURI != null
            || (getIntent() != null && (getIntent().hasExtra("bid") || getIntent().getData() != null))) {
        if (getIntent() != null && (getIntent().hasExtra("bid") || getIntent().getData() != null)) {
            Crashlytics.log(Log.DEBUG, "IRCCloud", "Launch intent contains a BID or URL");
            setFromIntent(getIntent());
        } else if (conn.getState() == NetworkConnection.STATE_CONNECTED && conn.getUserInfo() != null
                && conn.ready) {
            if (launchURI == null || !open_uri(launchURI)) {
                if (!open_bid(conn.getUserInfo().last_selected_bid)) {
                    if (!open_bid(BuffersDataSource.getInstance().firstBid())) {
                        if (drawerLayout != null && NetworkConnection.getInstance().ready
                                && findViewById(R.id.usersListFragment2) == null)
                            drawerLayout.openDrawer(Gravity.LEFT);
                    }
                }
            }
        }
    } else if (buffer != null) {
        int bid = buffer.bid;
        onBufferSelected(bid);
    }

    updateUsersListFragmentVisibility();
    update_subtitle();

    suggestions = ((MessageViewFragment) getSupportFragmentManager()
            .findFragmentById(R.id.messageViewFragment)).suggestions;
    suggestions.setAdapter(suggestionsAdapter);
    suggestions.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            String nick = suggestionsAdapter.getItem(position);
            String text = messageTxt.getText().toString();

            if (text.lastIndexOf(' ') > 0) {
                messageTxt.setText(text.substring(0, text.lastIndexOf(' ') + 1) + nick + " ");
            } else {
                if (nick.startsWith("#") || text.startsWith(":"))
                    messageTxt.setText(nick + " ");
                else
                    messageTxt.setText(nick + ": ");
            }
            messageTxt.setSelection(messageTxt.getText().length());
        }
    });
    suggestionsContainer = ((MessageViewFragment) getSupportFragmentManager()
            .findFragmentById(R.id.messageViewFragment)).suggestionsContainer;
    update_suggestions(false);

    if (refreshUpIndicatorTask != null)
        refreshUpIndicatorTask.cancel(true);
    refreshUpIndicatorTask = new RefreshUpIndicatorTask();
    refreshUpIndicatorTask.execute((Void) null);

    supportInvalidateOptionsMenu();

    if (NetworkConnection.getInstance().ready && buffer != null) {
        try {
            if (excludeBIDTask != null)
                excludeBIDTask.cancel(true);
            excludeBIDTask = new ExcludeBIDTask();
            excludeBIDTask.execute(buffer.bid);
        } catch (Exception e) {
        }
    }
    sendBtn.setEnabled(messageTxt.getText().length() > 0);
    if (Build.VERSION.SDK_INT >= 11 && messageTxt.getText().length() == 0)
        sendBtn.setAlpha(0.5f);

    if (drawerLayout != null)
        drawerLayout.closeDrawers();

    updateReconnecting();

    if (imgurTask != null)
        imgurTask.setActivity(this);

    if (fileUploadTask != null) {
        fileUploadTask.setActivity(this);
        if (fileUploadTask.metadataDialog == null && !fileUploadTask.filenameSet)
            fileUploadTask.show_dialog();
    }
    messageTxt.clearFocus();
    messageTxt.setEnabled(true);

    if (pastebinResult != null) {
        String text = "";
        String url = pastebinResult.getStringExtra("url");
        String message = pastebinResult.getStringExtra("message");
        if (url != null && url.length() > 0) {
            if (message != null && message.length() > 0)
                text += message + " ";
            text += url;
        } else {
            text = pastebinResult.getStringExtra("paste_contents");
        }
        messageTxt.setText(text);
        SendTask t = new SendTask();
        t.forceText = true;
        t.execute((Void) null);
        pastebinResult = null;
    }
}

---

From source file:cn.androidy.materialdesignsample.ryanharterviewpager.ViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollX = getScrollX();
    final int scrollY = getScrollY();

    int decorCount = 0;

    // First pass - decor views. We need to do this in two passes so that
    // we have the proper offsets for non-decor views later.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }//from   ww w.j av  a 2s  .c o  m
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                if (isOrientationHorizontal()) {
                    childLeft += scrollX;
                } else {
                    childTop += scrollY;
                }
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
                decorCount++;
            }
        }
    }

    int childSize = 0;
    if (isOrientationHorizontal()) {
        childSize = width - paddingLeft - paddingRight;
    } else {
        childSize = height - paddingTop - paddingBottom;
    }
    // Page views. Do this once we have the right padding offsets from above.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            if (!lp.isDecor && (ii = infoForChild(child)) != null) {
                int loff = (int) (childSize * ii.offset);
                int childLeft = paddingLeft + (isOrientationHorizontal() ? loff : 0);
                int childTop = paddingTop + (isOrientationHorizontal() ? 0 : loff);
                if (lp.needsMeasure) {
                    // This was added during layout and needs measurement.
                    // Do it now that we know what we're working with.
                    lp.needsMeasure = false;
                    int widthSpec = 0, heightSpec = 0;
                    if (isOrientationHorizontal()) {
                        widthSpec = MeasureSpec.makeMeasureSpec((int) (childSize * lp.sizeFactor),
                                MeasureSpec.EXACTLY);
                        heightSpec = MeasureSpec.makeMeasureSpec((int) (height - paddingTop - paddingBottom),
                                MeasureSpec.EXACTLY);
                    } else {
                        widthSpec = MeasureSpec.makeMeasureSpec((int) (width - paddingLeft - paddingRight),
                                MeasureSpec.EXACTLY);
                        heightSpec = MeasureSpec.makeMeasureSpec((int) (childSize * lp.sizeFactor),
                                MeasureSpec.EXACTLY);
                    }
                    child.measure(widthSpec, heightSpec);
                }
                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }
    mLeftPageBounds = paddingLeft;
    mTopPageBounds = paddingTop;
    mRightPageBounds = width - paddingRight;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;

    if (mFirstLayout) {
        scrollToItem(mCurItem, false, 0, false);
    }
    mFirstLayout = false;
}

---

From source file:com.baiiu.autoloopviewpager.loopvp.LoopViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    mInLayout = true;/*from   www.j  ava2 s.  co  m*/
    populate();
    mInLayout = false;

    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollX = getScrollX();

    int decorCount = 0;

    // First pass - decor views. We need to do this in two passes so that
    // we have the proper offsets for non-decor views later.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                childLeft += scrollX;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
                decorCount++;
            }
        }
    }

    // Page views. Do this once we have the right padding offsets from
    // above.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            if (!lp.isDecor && (ii = infoForChild(child)) != null) {

                int loff = (int) (width * ii.offset);

                int childLeft = paddingLeft + loff;
                int childTop = paddingTop;

                if (lp.needsMeasure) {
                    // This was added during layout and needs measurement.
                    // Do it now that we know what we're working with.
                    lp.needsMeasure = false;
                    final int widthSpec = MeasureSpec.makeMeasureSpec(
                            (int) ((width - paddingLeft - paddingRight) * lp.widthFactor), MeasureSpec.EXACTLY);
                    final int heightSpec = MeasureSpec
                            .makeMeasureSpec((int) (height - paddingTop - paddingBottom), MeasureSpec.EXACTLY);
                    child.measure(widthSpec, heightSpec);
                }
                if (DEBUG) {
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                }
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }

    // CHANGE
    scrollTo(0, 0);

    mTopPageBounds = paddingTop;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;
    mFirstLayout = false;
}

---

From source file:com.huangj.huangjlibrary.widget.drawerlayout.DrawerLayout.java

/**
 * Open the specified drawer view.// www . j  a v  a 2s  .  c  o m
 *
 * @param drawerView Drawer view to open
 * @param animate Whether opening of the drawer should be animated.
 */
public void openDrawer(View drawerView, boolean animate) {
    if (!isDrawerView(drawerView)) {
        throw new IllegalArgumentException("View " + drawerView + " is not a sliding drawer");
    }

    final LayoutParams lp = (LayoutParams) drawerView.getLayoutParams();
    if (mFirstLayout) {
        lp.onScreen = 1.f;
        lp.openState = LayoutParams.FLAG_IS_OPENED;

        updateChildrenImportantForAccessibility(drawerView, true);
    } else if (animate) {
        lp.openState |= LayoutParams.FLAG_IS_OPENING;

        if (checkDrawerViewAbsoluteGravity(drawerView, Gravity.LEFT)) {
            mLeftDragger.smoothSlideViewTo(drawerView, 0, drawerView.getTop());
        } else {
            mRightDragger.smoothSlideViewTo(drawerView, getWidth() - drawerView.getWidth(),
                    drawerView.getTop());
        }
    } else {
        moveDrawerToOffset(drawerView, 1.f);
        updateDrawerState(lp.gravity, STATE_IDLE, drawerView);
        drawerView.setVisibility(VISIBLE);
    }
    invalidate();
}

---

From source file:com.guide.ViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollX = getScrollX();
    final int scrollY = getScrollY();

    int decorCount = 0;

    // First pass - decor views. We need to do this in two passes so that
    // we have the proper offsets for non-decor views later.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }/*from w  ww .  ja v a  2  s .co m*/
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                if (isOrientationHorizontal()) {
                    childLeft += scrollX;
                } else {
                    childTop += scrollY;
                }
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
                decorCount++;
            }
        }
    }

    int childSize = 0;
    if (isOrientationHorizontal()) {
        childSize = width - paddingLeft - paddingRight;
    } else {
        childSize = height - paddingTop - paddingBottom;
    }
    // Page views. Do this once we have the right padding offsets from
    // above.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            if (!lp.isDecor && (ii = infoForChild(child)) != null) {
                int loff = (int) (childSize * ii.offset);
                int childLeft = paddingLeft + (isOrientationHorizontal() ? loff : 0);
                int childTop = paddingTop + (isOrientationHorizontal() ? 0 : loff);
                if (lp.needsMeasure) {
                    // This was added during layout and needs measurement.
                    // Do it now that we know what we're working with.
                    lp.needsMeasure = false;
                    int widthSpec = 0, heightSpec = 0;
                    if (isOrientationHorizontal()) {
                        widthSpec = MeasureSpec.makeMeasureSpec((int) (childSize * lp.sizeFactor),
                                MeasureSpec.EXACTLY);
                        heightSpec = MeasureSpec.makeMeasureSpec((int) (height - paddingTop - paddingBottom),
                                MeasureSpec.EXACTLY);
                    } else {
                        widthSpec = MeasureSpec.makeMeasureSpec((int) (width - paddingLeft - paddingRight),
                                MeasureSpec.EXACTLY);
                        heightSpec = MeasureSpec.makeMeasureSpec((int) (childSize * lp.sizeFactor),
                                MeasureSpec.EXACTLY);
                    }
                    child.measure(widthSpec, heightSpec);
                }
                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }
    mLeftPageBounds = paddingLeft;
    mTopPageBounds = paddingTop;
    mRightPageBounds = width - paddingRight;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;

    if (mFirstLayout) {
        scrollToItem(mCurItem, false, 0, false);
    }
    mFirstLayout = false;
}

---

From source file:com.isapp.android.circularviewpager.CircularViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollX = getScrollX();
    int decorCount = 0;
    // First pass - decor views. We need to do this in two passes so that
    // we have the proper offsets for non-decor views later.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }/*from  www .ja v a 2  s.  c o m*/
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                childLeft += scrollX;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
                decorCount++;
            }
        }
    }
    final int childWidth = width - paddingLeft - paddingRight;
    // Page views. Do this once we have the right padding offsets from above.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            if (!lp.isDecor && (ii = infoForChild(child)) != null) {
                int loff = (int) (childWidth * ii.offset);
                int childLeft = paddingLeft + loff;
                int childTop = paddingTop;
                if (lp.needsMeasure) {
                    // This was added during layout and needs measurement.
                    // Do it now that we know what we're working with.
                    lp.needsMeasure = false;
                    final int widthSpec = MeasureSpec.makeMeasureSpec((int) (childWidth * lp.widthFactor),
                            MeasureSpec.EXACTLY);
                    final int heightSpec = MeasureSpec
                            .makeMeasureSpec((int) (height - paddingTop - paddingBottom), MeasureSpec.EXACTLY);
                    child.measure(widthSpec, heightSpec);
                }
                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }
    mTopPageBounds = paddingTop;
    mBottomPageBounds = height - paddingBottom;
    mDecorChildCount = decorCount;
    if (mFirstLayout) {
        scrollToItem(mCurItem, false, 0, false);
    }
    mFirstLayout = false;
}

---

From source file:com.example.sky.test.view.ViewPager.java

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    // For simple implementation, our internal size is always 0.
    // We depend on the container to specify the layout size of
    // our view.  We can't really know what it is since we will be
    // adding and removing different arbitrary views and do not
    // want the layout to change as this happens.
    setMeasuredDimension(getDefaultSize(0, widthMeasureSpec), getDefaultSize(0, heightMeasureSpec));

    final int measuredWidth = getMeasuredWidth();
    final int maxGutterSize = measuredWidth / 10;
    mGutterSize = Math.min(maxGutterSize, mDefaultGutterSize);

    // Children are just made to fill our space.
    int childWidthSize = measuredWidth - getPaddingLeft() - getPaddingRight();
    int childHeightSize = getMeasuredHeight() - getPaddingTop() - getPaddingBottom();

    /*/*from w w w  .j av  a 2  s  . co  m*/
     * Make sure all children have been properly measured. Decor views first.
     * Right now we cheat and make this less complicated by assuming decor
     * views won't intersect. We will pin to edges based on gravity.
     */
    int size = getChildCount();
    for (int i = 0; i < size; ++i) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final ViewPager.LayoutParams lp = (ViewPager.LayoutParams) child.getLayoutParams();
            if (lp != null && lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                int widthMode = MeasureSpec.AT_MOST;
                int heightMode = MeasureSpec.AT_MOST;
                boolean consumeVertical = vgrav == Gravity.TOP || vgrav == Gravity.BOTTOM;
                boolean consumeHorizontal = hgrav == Gravity.LEFT || hgrav == Gravity.RIGHT;

                if (consumeVertical) {
                    widthMode = MeasureSpec.EXACTLY;
                } else if (consumeHorizontal) {
                    heightMode = MeasureSpec.EXACTLY;
                }

                int widthSize = childWidthSize;
                int heightSize = childHeightSize;
                if (lp.width != ViewPager.LayoutParams.WRAP_CONTENT) {
                    widthMode = MeasureSpec.EXACTLY;
                    if (lp.width != ViewPager.LayoutParams.MATCH_PARENT) {
                        widthSize = lp.width;
                    }
                }
                if (lp.height != ViewPager.LayoutParams.WRAP_CONTENT) {
                    heightMode = MeasureSpec.EXACTLY;
                    if (lp.height != ViewPager.LayoutParams.MATCH_PARENT) {
                        heightSize = lp.height;
                    }
                }
                final int widthSpec = MeasureSpec.makeMeasureSpec(widthSize, widthMode);
                final int heightSpec = MeasureSpec.makeMeasureSpec(heightSize, heightMode);
                child.measure(widthSpec, heightSpec);

                if (consumeVertical) {
                    childHeightSize -= child.getMeasuredHeight();
                } else if (consumeHorizontal) {
                    childWidthSize -= child.getMeasuredWidth();
                }
            }
        }
    }

    mChildWidthMeasureSpec = MeasureSpec.makeMeasureSpec(childWidthSize, MeasureSpec.EXACTLY);
    mChildHeightMeasureSpec = MeasureSpec.makeMeasureSpec(childHeightSize, MeasureSpec.EXACTLY);

    // Make sure we have created all fragments that we need to have shown.
    mInLayout = true;
    populate();
    mInLayout = false;

    // Page views next.
    size = getChildCount();
    for (int i = 0; i < size; ++i) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            if (DEBUG) {
                Log.v(TAG, "Measuring #" + i + " " + child + ": " + mChildWidthMeasureSpec);
            }

            final ViewPager.LayoutParams lp = (ViewPager.LayoutParams) child.getLayoutParams();
            if (lp == null || !lp.isDecor) {
                final int widthSpec = MeasureSpec.makeMeasureSpec((int) (childWidthSize * lp.widthFactor),
                        MeasureSpec.EXACTLY);
                child.measure(widthSpec, mChildHeightMeasureSpec);
            }
        }
    }
}

---

From source file:com.ifnoif.androidtestdemo.customview.VViewPager.java

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    final int count = getChildCount();
    int width = r - l;
    int height = b - t;
    int paddingLeft = getPaddingLeft();
    int paddingTop = getPaddingTop();
    int paddingRight = getPaddingRight();
    int paddingBottom = getPaddingBottom();
    final int scrollY = getScrollY();

    int decorCount = 0;

    // First pass - decor views. We need to do this in two passes so that
    // we have the proper offsets for non-decor views later.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            int childLeft = 0;
            int childTop = 0;
            if (lp.isDecor) {
                final int hgrav = lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK;
                final int vgrav = lp.gravity & Gravity.VERTICAL_GRAVITY_MASK;
                switch (hgrav) {
                default:
                    childLeft = paddingLeft;
                    break;
                case Gravity.LEFT:
                    childLeft = paddingLeft;
                    paddingLeft += child.getMeasuredWidth();
                    break;
                case Gravity.CENTER_HORIZONTAL:
                    childLeft = Math.max((width - child.getMeasuredWidth()) / 2, paddingLeft);
                    break;
                case Gravity.RIGHT:
                    childLeft = width - paddingRight - child.getMeasuredWidth();
                    paddingRight += child.getMeasuredWidth();
                    break;
                }//from  www  .j a  v a 2  s  . com
                switch (vgrav) {
                default:
                    childTop = paddingTop;
                    break;
                case Gravity.TOP:
                    childTop = paddingTop;
                    paddingTop += child.getMeasuredHeight();
                    break;
                case Gravity.CENTER_VERTICAL:
                    childTop = Math.max((height - child.getMeasuredHeight()) / 2, paddingTop);
                    break;
                case Gravity.BOTTOM:
                    childTop = height - paddingBottom - child.getMeasuredHeight();
                    paddingBottom += child.getMeasuredHeight();
                    break;
                }
                childTop += scrollY;
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
                decorCount++;
            }
        }
    }

    final int childHeight = height - paddingTop - paddingBottom;
    // Page views. Do this once we have the right padding offsets from above.
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            ItemInfo ii;
            if (!lp.isDecor && (ii = infoForChild(child)) != null) {
                int toff = (int) (childHeight * ii.offset);
                int childTop = paddingTop + toff;
                int childLeft = paddingLeft;
                if (lp.needsMeasure) {
                    // This was added during layout and needs measurement.
                    // Do it now that we know what we're working with.
                    lp.needsMeasure = false;
                    final int widthSpec = MeasureSpec
                            .makeMeasureSpec((int) (width - paddingLeft - paddingRight), MeasureSpec.EXACTLY);
                    final int heightSpec = MeasureSpec.makeMeasureSpec((int) (childHeight * lp.heightFactor),
                            MeasureSpec.EXACTLY);
                    child.measure(widthSpec, heightSpec);
                }
                if (DEBUG)
                    Log.v(TAG, "Positioning #" + i + " " + child + " f=" + ii.object + ":" + childLeft + ","
                            + childTop + " " + child.getMeasuredWidth() + "x" + child.getMeasuredHeight());
                child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(),
                        childTop + child.getMeasuredHeight());
            }
        }
    }
    mLeftPageBounds = paddingLeft;
    mRightPageBounds = width - paddingRight;
    mDecorChildCount = decorCount;

    if (mFirstLayout) {
        scrollToItem(mCurItem, false, 0, false);
    }
    mFirstLayout = false;
}

---

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