Java View.layout方法代码示例

import android.view.View; //导入方法依赖的package包/类
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    int count = getChildCount();
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams();
            int childLeft = lp.x;
            int childTop = lp.y;
            child.layout(childLeft, childTop, childLeft + lp.width, childTop + lp.height);//对子对象进行布局。

            if (lp.dropped) {
                lp.dropped = false;

                final int[] cellXY = mTmpCellXY;
                getLocationOnScreen(cellXY);
                mWallpaperManager.sendWallpaperCommand(getWindowToken(),
                        WallpaperManager.COMMAND_DROP,
                        cellXY[0] + childLeft + lp.width / 2,
                        cellXY[1] + childTop + lp.height / 2, 0, null);
            }
        }
    }
}
 

import android.view.View; //导入方法依赖的package包/类
@Override
public void onLayout(boolean changed, int l, int t, int r, int b) {
    boolean rtl = mHelper.useRtl();
    int viewWidth = getMeasuredWidth();

    // Initialize horizontal layout cursor. The cursor value increases as layout proceeds, but
    // actual layout locations in RTL mode are (viewWidth - cursorX).
    int cursorX = getFirstFieldX();

    for (int i = 0; i < mFieldViews.size(); i++) {
        View view = (View) mFieldViews.get(i);

        // Use the width and height of the field's view to compute its placement
        int fieldWidth = view.getMeasuredWidth();
        int fieldHeight = view.getMeasuredHeight();

        int left = rtl ? viewWidth - (cursorX + fieldWidth) : cursorX;
        view.layout(left, mBlockTopPadding, left + fieldWidth,
                mBlockTopPadding + fieldHeight);

        // Move x position left or right, depending on RTL mode.
        cursorX += fieldWidth + mHorizontalFieldSpacing;
    }

    layoutChild();
}
 

import android.view.View; //导入方法依赖的package包/类
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
  int count = getChildCount();
  mWidth = getMeasuredWidth();
  mHeight = getMeasuredHeight();
  for (int i = 0; i < count; i++) {
    View child = getChildAt(i);
    if (child.getVisibility() != GONE) {
      CenterLayout.LayoutParams lp = (CenterLayout.LayoutParams) child.getLayoutParams();
      int childLeft = mPaddingLeft + lp.x;
      if (lp.width > 0)
        childLeft += (int) ((mWidth - lp.width) / 2.0);
      else
        childLeft += (int) ((mWidth - child.getMeasuredWidth()) / 2.0);
      int childTop = mPaddingTop + lp.y;
      if (lp.height > 0)
        childTop += (int) ((mHeight - lp.height) / 2.0);
      else
        childTop += (int) ((mHeight - child.getMeasuredHeight()) / 2.0);
      child.layout(childLeft, childTop, childLeft + child.getMeasuredWidth(), childTop + child.getMeasuredHeight());
    }
  }
}
 

import android.view.View; //导入方法依赖的package包/类
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
    final int width = right - left;
    final int height = bottom - top;
    // Sub-rectangle specified by percentage values.
    final int subWidth = width * widthPercent / 100;
    final int subHeight = height * heightPercent / 100;
    final int subLeft = left + width * xPercent / 100;
    final int subTop = top + height * yPercent / 100;

    for (int i = 0; i < getChildCount(); ++i) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            final int childWidth = child.getMeasuredWidth();
            final int childHeight = child.getMeasuredHeight();
            // Center child both vertically and horizontally.
            final int childLeft = subLeft + (subWidth - childWidth) / 2;
            final int childTop = subTop + (subHeight - childHeight) / 2;
            child.layout(childLeft, childTop, childLeft + childWidth, childTop + childHeight);
        }
    }
}
 

import android.view.View; //导入方法依赖的package包/类
private void updateViewSize(Message msg) {
    // 重新设置View的宽高
    if (msg.obj != null) {
        rfView.headerImage.getLayoutParams().height += msg.arg1;
        View view = ((View) msg.obj);
        view.layout(view.getLeft(), 0, view.getRight(), view.getBottom());
    } else {
        // 实现类似弹簧的阻力效果，拉的越长就越难拉的动
        rfView.headerImageScaleHeight = rfView.headerImage.getLayoutParams().height
                - rfView.headerImageHeight;
        if (rfView.headerImageScaleHeight < (rfView.headerImageMaxHeight - rfView.headerImageHeight) / 3) {
            rfView.headerImage.getLayoutParams().height -= msg.arg1;
        } else if (rfView.headerImageScaleHeight > (rfView.headerImageMaxHeight - rfView.headerImageHeight) / 3 * 2) {
            rfView.headerImage.getLayoutParams().height -= msg.arg1 / 3 * 2;
        } else {
            rfView.headerImage.getLayoutParams().height -= msg.arg1 / 3 * 1.5;
        }
    }
    rfView.headerImage.requestLayout();
}
 

import android.view.View; //导入方法依赖的package包/类
private void layoutChild(View child) {
    int childWidth = child.getMeasuredWidth();
    int childHeight = child.getMeasuredHeight();
    childRect.top = childCenter.y - childHeight / 2;
    childRect.left = childCenter.x - childWidth / 2;
    childRect.right = childRect.left + childWidth;
    childRect.bottom = childRect.top + childHeight;
    child.layout(childRect.left, childRect.top, childRect.right, childRect.bottom);
}
 

import android.view.View; //导入方法依赖的package包/类
private void layoutChildWithAnchor(View child, View anchor, int layoutDirection) {
    LayoutParams lp = (LayoutParams) child.getLayoutParams();
    Rect anchorRect = this.mTempRect1;
    Rect childRect = this.mTempRect2;
    getDescendantRect(anchor, anchorRect);
    getDesiredAnchoredChildRect(child, layoutDirection, anchorRect, childRect);
    child.layout(childRect.left, childRect.top, childRect.right, childRect.bottom);
}
 

import android.view.View; //导入方法依赖的package包/类
@Override
public Bitmap getDescription( ArtworkFactory factory ) {
	View view;

	// Inflate the layout in case it has not been inflated yet for this Cover class
	if (sDescriptionViewMovie==null) {
		inflateDescriptionLayoutMovie(factory);
	}
	view = sDescriptionViewMovie;

	if (checkScraperInfo(factory)) {
		sMovieTitle.setText(mMovieInfo.getTitle());

		if ((mMovieInfo.getDirectors()!=null) && mMovieInfo.getDirectors().length()>0) {
			sMovieDirector.setText(mMovieInfo.getDirectors());
		}
		else { //fall-back on year if there is no director info
			sMovieDirector.setText(Integer.toString(mMovieInfo.getYear()));
		}
	}
	else {
		// Scraper info not available or not valid => fall-back on filename (this is not a common expected use-case...)
		sMovieTitle.setText(factory.removeFilenameExtension((new File(mFilepath)).getName()));
		sMovieDirector.setText("-");
	}

	if (mDurationMs!=0) {
		sMovieDuration.setText(factory.formatTime(mDurationMs));
	} else {
		sMovieDuration.setText("");
	}

	// Update the layout setup to take care of the updated text views
	view.measure(View.MeasureSpec.makeMeasureSpec(DESCRIPTION_TEXTURE_WIDTH, View.MeasureSpec.EXACTLY),
				 View.MeasureSpec.makeMeasureSpec(DESCRIPTION_TEXTURE_HEIGHT, View.MeasureSpec.AT_MOST));
	view.layout(0, 0, DESCRIPTION_TEXTURE_WIDTH, DESCRIPTION_TEXTURE_HEIGHT);

	return factory.createViewBitmap(view, DESCRIPTION_TEXTURE_WIDTH, DESCRIPTION_TEXTURE_HEIGHT);
}
 

import android.view.View; //导入方法依赖的package包/类
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    final int count = getChildCount();
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != View.GONE) {
            child.layout(0, 0,  r - l,  b - t);

        }
    }
}
 

import android.view.View; //导入方法依赖的package包/类
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    int count = getChildCount();
    int left = l + getPaddingLeft();
    int top = t + getPaddingTop();

    // keeps track of maximum row height
    int rowHeight = 0;

    for(int i = 0; i < count; i++) {
        View child = getChildAt(i);

        int childWidth = child.getMeasuredWidth();
        int childHeight = child.getMeasuredHeight();

        // if child fits in this row put it there
        if(left + childWidth < r - getPaddingRight()) {
            child.layout(left, top, left + childWidth, top + childHeight);
            left += childWidth;
        } else {
            // otherwise put it on next row
            left = l + getPaddingLeft();
            top += rowHeight;
            rowHeight = 0;
        }

        // update maximum row height
        if(childHeight > rowHeight) rowHeight = childHeight;
    }
}
 

import android.view.View; //导入方法依赖的package包/类
public boolean animateDisappearance(@NonNull ViewHolder viewHolder, @NonNull ItemHolderInfo preLayoutInfo, @Nullable ItemHolderInfo postLayoutInfo) {
    int oldLeft = preLayoutInfo.left;
    int oldTop = preLayoutInfo.top;
    View disappearingItemView = viewHolder.itemView;
    int newLeft = postLayoutInfo == null ? disappearingItemView.getLeft() : postLayoutInfo.left;
    int newTop = postLayoutInfo == null ? disappearingItemView.getTop() : postLayoutInfo.top;
    if (viewHolder.isRemoved() || (oldLeft == newLeft && oldTop == newTop)) {
        return animateRemove(viewHolder);
    }
    disappearingItemView.layout(newLeft, newTop, disappearingItemView.getWidth() + newLeft, disappearingItemView.getHeight() + newTop);
    return animateMove(viewHolder, oldLeft, oldTop, newLeft, newTop);
}
 

import android.view.View; //导入方法依赖的package包/类
/**
 * 摆放子 View
 *
 * @param changed 当前控件的尺寸大小, 位置 是否发生了变化
 * @param l       左边
 * @param t       顶部
 * @param r       右边
 * @param b       底部
 */
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
	View leftMenu = getChildAt(0);
	/*摆放 侧面板位置*/
	leftMenu.layout(-leftMenu.getMeasuredWidth(), 0, 0, b);

	/*摆放主面板*/
	getChildAt(1).layout(l, t, r, b);
}
 

import android.view.View; //导入方法依赖的package包/类
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
    int count = getChildCount();
    for (int i = 0; i < count; i++) {
        final View child = getChildAt(i);
        if (child.getVisibility() != GONE) {
            CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams();

            if (child instanceof LauncherAppWidgetHostView) {
                LauncherAppWidgetHostView lahv = (LauncherAppWidgetHostView) child;

                // Scale and center the widget to fit within its cells.
                DeviceProfile profile = mLauncher.getDeviceProfile();
                float scaleX = profile.appWidgetScale.x;
                float scaleY = profile.appWidgetScale.y;

                lahv.setScaleToFit(Math.min(scaleX, scaleY));
                lahv.setTranslationForCentering(-(lp.width - (lp.width * scaleX)) / 2.0f,
                        -(lp.height - (lp.height * scaleY)) / 2.0f);
            }

            int childLeft = lp.x;
            int childTop = lp.y;
            child.layout(childLeft, childTop, childLeft + lp.width, childTop + lp.height);

            if (lp.dropped) {
                lp.dropped = false;

                final int[] cellXY = mTmpCellXY;
                getLocationOnScreen(cellXY);
                mWallpaperManager.sendWallpaperCommand(getWindowToken(),
                        WallpaperManager.COMMAND_DROP,
                        cellXY[0] + childLeft + lp.width / 2,
                        cellXY[1] + childTop + lp.height / 2, 0, null);
            }
        }
    }
}
 

import android.view.View; //导入方法依赖的package包/类
private ChipSpan createAndPutChipForUser(TLRPC.User user) {
    LayoutInflater lf = (LayoutInflater) ApplicationLoader.applicationContext.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    View textView = lf.inflate(R.layout.group_create_bubble, null);
    TextView text = (TextView)textView.findViewById(R.id.bubble_text_view);
    String name = UserObject.getUserName(user);
    if (name.length() == 0 && user.phone != null && user.phone.length() != 0) {
        name = PhoneFormat.getInstance().format("+" + user.phone);
    }
    text.setText(name + ", ");

    int spec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
    textView.measure(spec, spec);
    textView.layout(0, 0, textView.getMeasuredWidth(), textView.getMeasuredHeight());
    Bitmap b = Bitmap.createBitmap(textView.getWidth(), textView.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(b);
    canvas.translate(-textView.getScrollX(), -textView.getScrollY());
    textView.draw(canvas);
    textView.setDrawingCacheEnabled(true);
    Bitmap cacheBmp = textView.getDrawingCache();
    Bitmap viewBmp = cacheBmp.copy(Bitmap.Config.ARGB_8888, true);
    textView.destroyDrawingCache();

    final BitmapDrawable bmpDrawable = new BitmapDrawable(b);
    bmpDrawable.setBounds(0, 0, b.getWidth(), b.getHeight());

    SpannableStringBuilder ssb = new SpannableStringBuilder("");
    ChipSpan span = new ChipSpan(bmpDrawable, ImageSpan.ALIGN_BASELINE);
    allSpans.add(span);
    selectedContacts.put(user.id, span);
    for (ImageSpan sp : allSpans) {
        ssb.append("<<");
        ssb.setSpan(sp, ssb.length() - 2, ssb.length(), SpannableStringBuilder.SPAN_EXCLUSIVE_EXCLUSIVE);
    }
    userSelectEditText.setText(ssb);
    userSelectEditText.setSelection(ssb.length());
    return span;
}
 

import android.view.View; //导入方法依赖的package包/类
private void processLayoutRequest() {
  mIsLayoutRequested = false;
  for (int i = 0, childCount = getChildCount(); i != childCount; ++i) {
    View child = getChildAt(i);
    if (!child.isLayoutRequested()) {
      continue;
    }

    child.measure(
      MeasureSpec.makeMeasureSpec(child.getWidth(), MeasureSpec.EXACTLY),
      MeasureSpec.makeMeasureSpec(child.getHeight(), MeasureSpec.EXACTLY));
    child.layout(child.getLeft(), child.getTop(), child.getRight(), child.getBottom());
  }
}