请问关于extends LinearLayout 的问题

gdutqiang 发布于 2016/09/12 20:19

阅读 145

Android

请问对应以下代码 getBackground().getIntrinsicHeight() 是什么意思呢? 得到的是什么值呢？
麻烦知道的朋友帮忙回复，谢谢啦

代码如下：
public class MyTab extends LinearLayout
{

public MyTab(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);

TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.TabWidget, defStyle, 0);

。。。。
。。。
}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);

int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);

if (widthSpecMode != MeasureSpec.EXACTLY) {
widthSpecSize = 0;
}

if (heightSpecMode != MeasureSpec.EXACTLY) {
heightSpecSize = 0;
}

if (widthSpecMode == MeasureSpec.UNSPECIFIED
|| heightSpecMode == MeasureSpec.UNSPECIFIED) {
}

int width;
int height;
width = Math.max(getMeasuredWidth(), widthSpecSize);
height = Math.max(this.getBackground().getIntrinsicHeight(),heightSpecSize);

setMeasuredDimension(width, height);
}

}