如何设置动态高度以在安卓中查看寻呼机子片段?

Question

我有 4 个不同片段的视图寻呼机。在此，3 个片段仅包含 Web 视图。所有片段加载不同的内容。我无法根据加载的内容设置高度。为此，我编写了一个自定义视图页来测量视图页的高度。对于第一个查看页片段，高度计算正确。但是，当导航到第二个或第三个片段时，无法准确计算查看页高度。我不知道，我的代码中有什么问题，以及导航到该视图寻呼机页面后我需要更改什么才能计算每个片段的适当高度。这是我的视图寻呼机和寻呼机适配器代码。请帮助我。

自定义视图寻呼机：

public class CustomViewPager extends ViewPager {
public CustomViewPager (Context context) {
super(context);
}
public CustomViewPager (Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
boolean wrapHeight = MeasureSpec.getMode(heightMeasureSpec) == MeasureSpec.AT_MOST;
final View tab = getChildAt(0);
int width = getMeasuredWidth();
int tabHeight = tab.getMeasuredHeight();
if (wrapHeight) {
// Keep the current measured width.
widthMeasureSpec = MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY);
}
int fragmentHeight = measureFragment(((Fragment) getAdapter().instantiateItem(this, getCurrentItem())).getView());
heightMeasureSpec = MeasureSpec.makeMeasureSpec(tabHeight + fragmentHeight + (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, getResources().getDisplayMetrics()), MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
public void setOnPageChangeListener(OnPageChangeListener listener) {
requestLayout();
invalidate();
super.setOnPageChangeListener(listener);
}
@Override
public void addOnPageChangeListener(OnPageChangeListener listener) {
super.addOnPageChangeListener(listener);
}
public int measureFragment(View view) {
if (view == null)
return 0;
view.measure(0, 0);
return view.getMeasuredHeight();
}
}

寻呼机适配器：

public class MerchantsCataAdapter extends FragmentPagerAdapter {
Context context;
Merchant merchant;
Fragment fragment;
private int mCurrentPosition = -1;
private String[] tabs = {"Home", "About Us","Promotions","Store Information"};
public MerchantsCataAdapter(FragmentManager fm, Context context,Merchant merchant) {
super(fm);
this.context = context;
this.merchant = merchant;
}
@Override
public Fragment getItem(int index) {
switch (index) {
case 0:
fragment= new HomeContentFragment().newInstance(merchant.getCompany_home_content(),merchant.getVideo_url());
break;
case 1:
fragment= new AboutusFragment().newInstance(merchant.getFull_description(),merchant.getVideo_url());
break;
case 2:
fragment= new AboutusFragment().newInstance(merchant.getCompany_promotions(),merchant.getVideo_url());
break;
case 3:
fragment= new FragmentStoreInformation().newInstance(merchant.getMerchantId(),merchant.getName());
break;
}
return fragment;
}

@Override
public int getCount() {
return tabs.length;
}
public String getTabView(int position) {
return tabs[position];
}

Answer 1

最后，我找到了答案。在 xml 中的 Web 视图中将属性放在下面。这将根据内容自动获取 Web 视图高度。

android:scrollbarStyle="insideOverlay"