Java Code Examples for android.view.View.getWidth()

@Override
public void onViewReleased(View releasedChild, float xvel, float yvel) {
    final int childWidth = releasedChild.getWidth();
    final int childHeight = releasedChild.getHeight();

    int left = 0, top = 0;
    if ((mTrackingEdge & EDGE_LEFT) != 0) {
        left = xvel > 0 || xvel == 0 && mScrollPercent > mScrollThreshold ? childWidth
                + mShadowLeft.getIntrinsicWidth() + OVERSCROLL_DISTANCE : 0;
    } else if ((mTrackingEdge & EDGE_RIGHT) != 0) {
        left = xvel < 0 || xvel == 0 && mScrollPercent > mScrollThreshold ? -(childWidth
                + mShadowLeft.getIntrinsicWidth() + OVERSCROLL_DISTANCE) : 0;
    } else if ((mTrackingEdge & EDGE_BOTTOM) != 0) {
        top = yvel < 0 || yvel == 0 && mScrollPercent > mScrollThreshold ? -(childHeight
                + mShadowBottom.getIntrinsicHeight() + OVERSCROLL_DISTANCE) : 0;
    }

    mDragHelper.settleCapturedViewAt(left, top);
    invalidate();
}
 

@Override
public void onViewReleased(View releasedChild, float xvel, float yvel) {
  // Offset is how open the drawer is, therefore left/right values
  // are reversed from one another.
  final float offset = getDrawerViewOffset(releasedChild);
  final int childWidth = releasedChild.getWidth();

  int left;
  if (checkDrawerViewAbsoluteGravity(releasedChild, Gravity.LEFT)) {
    left = xvel > 0 || xvel == 0 && offset > 0.5f ? 0 : -childWidth;
  } else {
    final int width = getWidth();
    left = xvel < 0 || xvel == 0 && offset > 0.5f ? width - childWidth : width;
  }

  mDragger.settleCapturedViewAt(left, releasedChild.getTop());
  invalidate();
}
 

private void updateIndicatorPosition() {
    int right;
    int left;
    View selectedTitle = getChildAt(this.mSelectedPosition);
    if (selectedTitle == null || selectedTitle.getWidth() <= 0) {
        right = -1;
        left = -1;
    } else {
        left = selectedTitle.getLeft();
        right = selectedTitle.getRight();
        if (this.mSelectionOffset > 0.0f && this.mSelectedPosition < getChildCount() - 1) {
            View nextTitle = getChildAt(this.mSelectedPosition + 1);
            left = (int) ((this.mSelectionOffset * ((float) nextTitle.getLeft())) + ((1.0f - this.mSelectionOffset) * ((float) left)));
            right = (int) ((this.mSelectionOffset * ((float) nextTitle.getRight())) + ((1.0f - this.mSelectionOffset) * ((float) right)));
        }
    }
    setIndicatorPosition(left, right);
}
 

public void drawHorizontal(Canvas c, RecyclerView parent) {

        final int childCount = parent.getChildCount();

        // 在每一个子控件的底部画线
        for (int i = 0; i < childCount; i++) {
            final View child = parent.getChildAt(i);

            final int left = child.getLeft() + child.getPaddingLeft();
            final int right = child.getWidth() + child.getLeft() - child.getPaddingRight();
            final int top = child.getBottom() - mDivider.getIntrinsicHeight() - child.getPaddingBottom();
            final int bottom = top + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.draw(c);
        }
    }
 

@Override
public boolean onTouch(final View v, final MotionEvent event) {
    switch (event.getActionMasked()) {
        case MotionEvent.ACTION_DOWN:
            onTouchDown(v);
            return true;
        case MotionEvent.ACTION_MOVE:
            final float x = event.getX();
            final float y = event.getY();
            if (x < 0.0f || v.getWidth() < x || y < 0.0f || v.getHeight() < y) {
                // Stop generating key events once the finger moves away from the view area.
                onTouchCanceled(v);
            }
            return true;
        case MotionEvent.ACTION_CANCEL:
        case MotionEvent.ACTION_UP:
            onTouchUp(v);
            return true;
    }
    return false;
}
 

public MjpegViewThread(SurfaceHolder surfaceHolder, View view){
    mSurfaceHolder = surfaceHolder;
    mRun = false;
    mCallback = null;
    dispWidth = view.getWidth();
    dispHeight = view.getHeight();
    prevdispWidth = dispWidth;
    prevdispHeight = dispHeight;
    destRect = new Rect(0,0,dispWidth,dispHeight);
    destSrc = null;
    displayMode = 1; // Default : SIZE_FIT_MODE
    prevdisplayMode = 1;

    bgColor = new Paint();
    bgColor.setStyle(Paint.Style.FILL);
    bgColor.setARGB(255, 0, 0, 0);
}
 

@SuppressLint("NewApi")
public void transformPage(View view, float position) {
    int pageWidth = view.getWidth();
    int pageHeight = view.getHeight();

    Log.e("TAG", view + " , " + position + "");

    if (position < -1) { // [-Infinity,-1)
        // This page is way off-screen to the left.
        view.setAlpha(0);

    } else if (position <= 1) //a页滑动至b页 ； a页从 0.0 -1 ；b页从1 ~ 0.0
    { // [-1,1]
        // Modify the default slide transition to shrink the page as well
        float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
        float vertMargin = pageHeight * (1 - scaleFactor) / 2;
        float horzMargin = pageWidth * (1 - scaleFactor) / 2;
        if (position < 0) {
            view.setTranslationX(horzMargin - vertMargin / 2);
        } else {
            view.setTranslationX(-horzMargin + vertMargin / 2);
        }

        // Scale the page down (between MIN_SCALE and 1)
        view.setScaleX(scaleFactor);
        view.setScaleY(scaleFactor);

        // Fade the page relative to its size.
        view.setAlpha(MIN_ALPHA + (scaleFactor - MIN_SCALE)
                / (1 - MIN_SCALE) * (1 - MIN_ALPHA));

    } else { // (1,+Infinity]
        // This page is way off-screen to the right.
        view.setAlpha(0);
    }
}
 

private void animateToTab(final int position) {
    final View tabView = mTabLayout.getChildAt(position);
    if (mTabSelector != null) {
        removeCallbacks(mTabSelector);
    }
    mTabSelector = new Runnable() {
        public void run() {
            final int scrollPos = tabView.getLeft() - (getWidth() - tabView.getWidth()) / 2;
            smoothScrollTo(scrollPos, 0);
            mTabSelector = null;
        }
    };
    post(mTabSelector);
}
 

@Override
protected void onTransform(View view, float position) {
	final float width = view.getWidth();
	final float rotation = ROT_MOD * position;

	view.setPivotX(width * 0.5f);
	view.setPivotY(0f);
	view.setTranslationX(0f);
	view.setRotation(rotation);
}
 

@Override
protected void onTransform(View view, float position) {
	final float width = view.getWidth();
	final float rotation = ROT_MOD * position;

	view.setPivotX(width * 0.5f);
	view.setPivotY(0f);
	view.setTranslationX(0f);
	view.setRotation(rotation);
}
 

public void transformPage(View view, float position) {
    int pageWidth = view.getWidth();
    int pageHeight = view.getHeight();

    if (position < -1) { // [-Infinity,-1)
        // This page is way off-screen to the left.
        view.setAlpha(0);

    } else if (position <= 1) { // [-1,1]
        // Modify the default slide transition to shrink the page as well
        float scaleFactor = Math.max(MIN_SCALE, 1 - Math.abs(position));
        float vertMargin = pageHeight * (1 - scaleFactor) / 2;
        float horzMargin = pageWidth * (1 - scaleFactor) / 2;
        if (position < 0) {
            view.setTranslationX(horzMargin - vertMargin / 2);
        } else {
            view.setTranslationX(-horzMargin + vertMargin / 2);
        }

        // Scale the page down (between MIN_SCALE and 1)
        view.setScaleX(scaleFactor);
        view.setScaleY(scaleFactor);

        // Fade the page relative to its size.
        view.setAlpha(MIN_ALPHA +
                (scaleFactor - MIN_SCALE) /
                (1 - MIN_SCALE) * (1 - MIN_ALPHA));

    } else { // (1,+Infinity]
        // This page is way off-screen to the right.
        view.setAlpha(0);
    }
}
 

public static boolean isTouchPointInView(@NonNull View view, float x, float y) {
    final int[] coordinates = new int[3];
    view.getLocationInWindow(coordinates);
    int left = coordinates[0];
    int top = coordinates[1];
    return x >= left && x <= left + view.getWidth() &&
            y >= top && y <= top + view.getHeight();
}
 

@Override
public void onProfileClick(View v) {
    int[] startingLocation = new int[2];
    v.getLocationOnScreen(startingLocation);
    startingLocation[0] += v.getWidth() / 2;
    // ProfileActivity.startUserProfileFromLocation(startingLocation, this);
    overridePendingTransition(0, 0);
}
 

@Override
public void captureEndValues(TransitionValues transitionValues) {
    super.captureEndValues(transitionValues);
    final View view = transitionValues.view;
    if (view.getWidth() <= 0 || view.getHeight() <= 0) {
        return;
    }
    transitionValues.values.put(PROPERTY_COLOR, endColor);//ContextCompat.getColor(view.getContext(), R.color.dialog_background_color)
    transitionValues.values.put(PROPERTY_CORNER_RADIUS, endCornerRadius);
}
 

public static void setBackground(View v, Bitmap bm) {

        if (bm == null) {
            v.setBackgroundResource(0);
            return;
        }

        int vwidth = v.getWidth()/4;
        int vheight = v.getHeight()/4;
        int bwidth = bm.getWidth();
        int bheight = bm.getHeight();
        float scalex = (float) vwidth / bwidth;
        float scaley = (float) vheight / bheight;
        float scale = Math.max(scalex, scaley) * 1.3f;

        Bitmap.Config config = Bitmap.Config.ARGB_8888;
        Bitmap bg = Bitmap.createBitmap(vwidth, vheight, config);
        Canvas c = new Canvas(bg);
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setFilterBitmap(true);
        ColorMatrix greymatrix = new ColorMatrix();
        greymatrix.setSaturation(0);
        ColorMatrix darkmatrix = new ColorMatrix();
        darkmatrix.setScale(1f, 1f, 1f, .1f);
        greymatrix.postConcat(darkmatrix);
        ColorFilter filter = new ColorMatrixColorFilter(greymatrix);
        paint.setColorFilter(filter);
        Matrix matrix = new Matrix();
        matrix.setTranslate(-bwidth/2, -bheight/2); // move bitmap center to origin
        matrix.postRotate(10);
        matrix.postScale(scale, scale);
        matrix.postTranslate(vwidth/2, vheight/2);  // Move bitmap center to view center
        c.drawBitmap(bm, matrix, paint);
        v.setBackgroundDrawable(new BitmapDrawable(bg));
    }
 

public static boolean isTouchInView(MotionEvent ev, View v) {
    int[] vLoc = new int[2];
    v.getLocationOnScreen(vLoc);
    float motionX = ev.getRawX();
    float motionY = ev.getRawY();
    return motionX >= vLoc[0] && motionX <= (vLoc[0] + v.getWidth()) && motionY >= vLoc[1] && motionY <= (vLoc[1] + v.getHeight());
}
 

/***
 * adjust position before Touch event complete and fling action start.
 */
protected void adjustPositionX(int velocityX) {
    if (reverseLayout) velocityX *= -1;

    int childCount = getChildCount();
    if (childCount > 0) {
        int curPosition = ViewUtils.getCenterXChildPosition(this);
        int childWidth = getWidth() - getPaddingLeft() - getPaddingRight();
        int flingCount = getFlingCount(velocityX, childWidth);
        int targetPosition = curPosition + flingCount;
        if (mSinglePageFling) {
            flingCount = Math.max(-1, Math.min(1, flingCount));
            targetPosition = flingCount == 0 ? curPosition : mPositionOnTouchDown + flingCount;
        }
        targetPosition = Math.max(targetPosition, 0);
        targetPosition = Math.min(targetPosition, getItemCount() - 1);
        if (targetPosition == curPosition
                && (!mSinglePageFling || mPositionOnTouchDown == curPosition)) {
            View centerXChild = ViewUtils.getCenterXChild(this);
            if (centerXChild != null) {
                if (mTouchSpan > centerXChild.getWidth() * mTriggerOffset * mTriggerOffset && targetPosition != 0) {
                    if (!reverseLayout) targetPosition--;
                    else targetPosition++;
                } else if (mTouchSpan < centerXChild.getWidth() * -mTriggerOffset && targetPosition != getItemCount() - 1) {
                    if (!reverseLayout) targetPosition++;
                    else targetPosition--;
                }
            }
        }
        smoothScrollToPosition(safeTargetPosition(targetPosition, getItemCount()));
    }
}
 

/**
 * 获取整个手机屏幕的大小(包括虚拟按钮)
 * 必须在onWindowFocus方法之后使用
 *
 * @param activity
 * @return
 */
public static int[] getScreenSize(AppCompatActivity activity) {
    int[] size = new int[2];
    View decorView = activity.getWindow().getDecorView();
    size[0] = decorView.getWidth();
    size[1] = decorView.getHeight();
    return size;
}
 

void moveDrawerToOffset(View drawerView, float slideOffset) {
  final float oldOffset = getDrawerViewOffset(drawerView);
  final int width = drawerView.getWidth();
  final int oldPos = (int) (width * oldOffset);
  final int newPos = (int) (width * slideOffset);
  final int dx = newPos - oldPos;

  drawerView.offsetLeftAndRight(
      checkDrawerViewAbsoluteGravity(drawerView, Gravity.LEFT) ? dx : -dx);
  setDrawerViewOffset(drawerView, slideOffset);
}
 

static double calculateMaxRadius(View view) {
    double widthSquared = view.getWidth() * view.getWidth();
    double heightSquared = view.getHeight() * view.getHeight();
    double radius = Math.sqrt(widthSquared + heightSquared) / 2;
    return radius;
}