How to use

onMeasure

method

in

androidx.appcompat.widget.AppCompatImageView

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  int width = MeasureSpec.getSize(widthMeasureSpec);
  int widthMode = MeasureSpec.getMode(widthMeasureSpec);
  int height = MeasureSpec.getSize(heightMeasureSpec);
  int heightMode = MeasureSpec.getMode(heightMeasureSpec);
  if (widthMode == MeasureSpec.EXACTLY || widthMode == MeasureSpec.AT_MOST) {
    height = calculate(width, aspect, VERTICAL);
  } else if (heightMode == MeasureSpec.EXACTLY || heightMode == MeasureSpec.AT_MOST) {
    width = calculate(height, aspect, HORIZONTAL);
  } else if (width != 0) {
    height = calculate(width, aspect, VERTICAL);
  } else if (height != 0) {
    width = calculate(height, aspect, HORIZONTAL);
  } else {
    Log.e(AspectImageView.class.getSimpleName(),
        "Either width or height should have exact value");
  }
  int specWidth = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY);
  int specHeight = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY);
  super.onMeasure(specWidth, specHeight);
}

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    Drawable drawable = getDrawable();

    if (drawable != null) {
      int width = MeasureSpec.getSize(widthMeasureSpec);
      int diw = drawable.getIntrinsicWidth();
      if (diw > 0) {
        int height = width * drawable.getIntrinsicHeight() / diw;
        setMeasuredDimension(width, height);
        return;
      }
    }

    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  }
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  if (mIsSquare) {
    int measuredWidth = MeasureSpec.getSize(widthMeasureSpec);
    int size = measuredWidth == 0 ? MeasureSpec.getSize(heightMeasureSpec) : measuredWidth;
    setMeasuredDimension(size, size);
  }
}

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
    if (widthMode == MeasureSpec.AT_MOST || widthMode == MeasureSpec.UNSPECIFIED) {
      final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
      final int maxWidth = getMaxWidth();
      if (maxWidth != Integer.MAX_VALUE
          && (maxWidth < widthSize || widthMode == MeasureSpec.UNSPECIFIED)) {
        widthMeasureSpec = MeasureSpec.makeMeasureSpec(maxWidth, MeasureSpec.AT_MOST);
      }
    }

    final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
    if (heightMode == MeasureSpec.AT_MOST || heightMode == MeasureSpec.UNSPECIFIED) {
      final int heightSize = MeasureSpec.getSize(heightMeasureSpec);
      final int maxHeight = getMaxHeight();
      if (maxHeight != Integer.MAX_VALUE
          && (maxHeight < heightSize || heightMode == MeasureSpec.UNSPECIFIED)) {
        heightMeasureSpec = MeasureSpec.makeMeasureSpec(maxHeight, MeasureSpec.AT_MOST);
      }
    }

    super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  }
}

  /**
   * Adjust Dimensions to create a square image view that matches the parents width.
   */
  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);

    int width = getMeasuredWidth();
    setMeasuredDimension(width, width);
  }
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  int size;
  if (mSize <= 0)
    size = (int) Math.ceil(
        (mProgress.getCenterRadius() + mProgress.getStrokeWidth() + mPaddingEdge) * 2);
  else
    size = (int) Math.ceil(mSize);
  if (mShowShadowsCircle && !elevationSupported()) {
    size += Math.round(mElevation * 2);
  }
  setMeasuredDimension(resolveSize(size, widthMeasureSpec),
      resolveSize(size, heightMeasureSpec));
}