Android View Measure

measure.java

//https://github.com/devunwired/custom-view-examples/tree/master/app/src/main/java/com/example/customview/widget
    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        setMeasuredDimension(measure(widthMeasureSpec, true), measure(heightMeasureSpec, false));
    }

    private int measure(int measureSpec, boolean isWidth) {
        int result;
        int mode = MeasureSpec.getMode(measureSpec);
        int size = MeasureSpec.getSize(measureSpec);
        int padding = isWidth ? getPaddingLeft() + getPaddingRight() + foreCircleRadius : getPaddingTop() + getPaddingBottom() + foreCircleRadius;
        if (mode == MeasureSpec.EXACTLY) {
            result = size;
        } else {
            result = isWidth ? getSuggestedMinimumWidth() : getSuggestedMinimumHeight();
            result += padding;
            //Get the width based on the measure specs
            result += View.resolveSize(result, measureSpec);
            if (mode == MeasureSpec.AT_MOST) {
                if (isWidth) {
                    result = Math.min(result, size);
                } else {
                    result = Math.min(result, size);
                }
            }
        }
        return result;
//要是ImageView,就需要measureDrawable的宽与高.
//        Drawable d = getDrawable();
//        if (d == null) {
//            desiredSize = 0;
//            aspect = 1f;
//        } else {
//            desiredSize = d.getIntrinsicWidth();
//            aspect = (float) d.getIntrinsicWidth() / (float) d.getIntrinsicHeight();
//        }
        
        
    }