需求是在ScrollView中嵌套ViewPager，每个fragment中高度不同
步骤：
1，自定义viewpager重写onMeasure方法
@Override
protected void onMeasure(int widthMeasureSpec,int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
//高度自适应处理
View view = getChildAt(getCurrentItem());
if (view !=null) {
view.measure(widthMeasureSpec, heightMeasureSpec);
}
setMeasuredDimension(getMeasuredWidth(), measureHeight(heightMeasureSpec, view));
}
/**
* Determines the height of this view
* @param measureSpec A measureSpec packed into an int
* @param view the base view with already measured height
* @return The height of the view, honoring constraints from measureSpec
*/
private int measureHeight(int measureSpec, View view) {
int result =0;
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);
if (specMode == MeasureSpec.EXACTLY) {
result = specSize;
}else {
// set the height from the base view if available
if (view !=null) {
result = view.getMeasuredHeight();
}
if (specMode == MeasureSpec.AT_MOST) {
result = Math.min(result, specSize);
}
}
return result;
}
2，在代码中调用
viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}
@Override
public void onPageSelected(final int position) {
// 切换到当前页面，重置高度
mViewPager.requestLayout();
}
@Override
public void onPageScrollStateChanged(int state) { }
});
最后一定要设置viewPager.setOffscreenPageLimit(adapter.getCount());
文章来源:
https://blog.csdn.net/u013626215/article/details/79866050