android.view.View#getMinimumHeight ( )源码实例Demo

public static int getMinHeight(View view)
{
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
    {
        return view.getMinimumHeight();
    } else
    {
        try
        {
            Field minHeight = view.getClass().getField("mMinHeight");
            minHeight.setAccessible(true);
            return (int) minHeight.get(view);
        } catch (Exception e)
        {
        }
    }

    return 0;
}
 

public static void expand(final View v, @Nullable Animation.AnimationListener listener) {
    final int targetHeight;
    if (v.getMinimumHeight() != 0) {
        targetHeight = v.getMinimumHeight();
    } else {
        v.measure(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        targetHeight = v.getMeasuredHeight();
    }

    v.getLayoutParams().height = 0;
    v.setVisibility(View.VISIBLE);
    Animation a = new Animation() {
        @Override
        protected void applyTransformation(float interpolatedTime, Transformation t) {
            v.getLayoutParams().height = interpolatedTime == 1
                    ? ViewGroup.LayoutParams.WRAP_CONTENT
                    : (int) (targetHeight * interpolatedTime);
            v.requestLayout();
        }

        @Override
        public boolean willChangeBounds() {
            return true;
        }
    };

    if (listener != null) a.setAnimationListener(listener);

    a.setDuration((int) (targetHeight / v.getContext().getResources().getDisplayMetrics().density));
    v.startAnimation(a);
}
 

public static int getMinHeight(View view) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
        return view.getMinimumHeight();
    } else {
        return getValue(view, METHOD_GET_MIN_HEIGHT);
    }
}
 

/**
 * View Measure
 * @param view              待计算 View
 * @param widthMeasureSpec  horizontal space requirements as imposed by the parent
 * @param heightMeasureSpec vertical space requirements as imposed by the parent
 * @param maximumWidth      maximum Width
 * @param maximumHeight     maximum Height
 * @param defaultValue      默认值
 * @return measure space Array
 */
public static int[] viewMeasure(final View view, final int widthMeasureSpec, final int heightMeasureSpec,
                                final int maximumWidth, final int maximumHeight, final int defaultValue) {
    int minimumWidth = 0, minimumHeight = 0;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
        minimumWidth = view.getMinimumWidth();
        minimumHeight = view.getMinimumHeight();
    }
    return viewMeasure(widthMeasureSpec, heightMeasureSpec,
        minimumWidth, maximumWidth, minimumHeight, maximumHeight, defaultValue);
}
 

/**
 * 获取 View 最小高度
 * @param view View
 * @return View 最小高度
 */
@RequiresApi(Build.VERSION_CODES.JELLY_BEAN)
public static int getMinimumHeight(final View view) {
    if (view != null) {
        return view.getMinimumHeight();
    }
    return 0;
}
 

public static int getMinimumHeight(View view) {
    return view.getMinimumHeight();
}
 

public static int getMinimumHeight(View view) {
    return view.getMinimumHeight();
}