• Fragment中不能使用自定义带参构造函数


    通过Fragment自定义的静态方法将值从activity传到fragment中,然后就想到这样不是多次一举吗,为什么不直接写个带参构造函数将值传过去呢?试了一下,发现Fragment有参构造函数竟然报错,抱歉写了这么长时间代码对Fragment还不是很会用,笑哭,感觉任重道远啊...android中Fragment的构造函数
    String[] titles = {
                    GlobalConfig.CATEGORY_NAME_APP,
                    GlobalConfig.CATEGORY_NAME_ANDROID,
                    GlobalConfig.CATEGORY_NAME_IOS,
                    GlobalConfig.CATEGORY_NAME_FRONT_END,
                    GlobalConfig.CATEGORY_NAME_RECOMMEND,
                    GlobalConfig.CATEGORY_NAME_RESOURCE};
    
            CommonViewPagerAdapter infoPagerAdapter = new CommonViewPagerAdapter(getSupportFragmentManager(),titles);
            // App
            CategoryFragment appFragment = CategoryFragment.newInstance(titles[0]);
            // Android
            CategoryFragment androidFragment = CategoryFragment.newInstance(titles[1]);
            // iOS
            CategoryFragment iOSFragment = CategoryFragment.newInstance(titles[2]);
            // 前端
            CategoryFragment frontFragment = CategoryFragment.newInstance(titles[3]);
            // 瞎推荐
            CategoryFragment referenceFragment = CategoryFragment.newInstance(titles[4]);
            // 拓展资源s
            CategoryFragment resFragment = CategoryFragment.newInstance(titles[5]);
    
            infoPagerAdapter.addFragment(appFragment);
            infoPagerAdapter.addFragment(androidFragment);
            infoPagerAdapter.addFragment(iOSFragment);
            infoPagerAdapter.addFragment(frontFragment);
            infoPagerAdapter.addFragment(referenceFragment);
            infoPagerAdapter.addFragment(resFragment);
    public static CategoryFragment newInstance(String mCategoryName) {
            CategoryFragment categoryFragment = new CategoryFragment();
            Bundle bundle = new Bundle();
            bundle.putString(CATEGORY_NAME, mCategoryName);
            categoryFragment.setArguments(bundle);
            return categoryFragment;
        }
    @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {
            // Inflate the layout for this fragment
            View view = inflater.inflate(R.layout.fragment_blank, container, false);
            ButterKnife.bind(this, view);
    
            //取出传过来的值
            Bundle bundle = getArguments();
            mTitle  = bundle.getString(ARG_TITLE);
    
            return view;
        }
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  • 原文地址:https://www.cnblogs.com/ganchuanpu/p/11971341.html
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