如何在 Kotlin 中使用不同的条件/参数从 RecyclerView 的 Detail Activity 中打开一个新 Activity答案

【问题标题】：How to open a new activity inside the Detail Activity from RecyclerView with different conditions/parameters in Kotlin如何在 Kotlin 中使用不同的条件/参数从 RecyclerView 的 Detail Activity 中打开一个新 Activity
【发布时间】：2022-08-07 11:57:00
【问题描述】：

我有基本的线框布局，谁描述了我的问题，因为我不知道如何用好的打字来解释。（但我会尽可能清楚地解释我的意思，并尽可能多地解释）。

*我希望你们都能理解我的线框是什么意思:)

*如果您对此感到难以理解，请告诉我，我会做得更好，更详细。

所以从线框图来看，我有 3 个活动。

MainActivity，带有TabLayout，里面填充了Fragment，里面有一个RecyclerView，
DetailActivity，其中包含从 MainActivity 中的每个 RecyclerView Item 带来的数据，

WebViewActivity，这将是用户单击 DetailActivity 中的一个按钮后的最后一个活动与之前选择的每个 RecyclerView 项目不同的上下文用户。

从我描述的线框图中，我已经成功打开了“WebViewActivity”，并使用“Button No.2”从“DetailActivity”中根据指定的参数（google.com）加载了 URL

我的问题是：

用户来访时如何打开 WebViewActivity 并加载“Youtube.com” 从 \"RecyclerView Item No.2\" 通过单击 \"Button 1\" Inside of Detail 活动？。

用户来访时如何打开 WebViewActivity 并加载“Gmail.com” 从 \"RecyclerView Item No.3\" 通过单击详细信息内部的 \"Button 1\" 活动？。

这是我未解决的代码：

MainActivity.kt

class MainActivity : AppCompatActivity() {


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)


        setUpTabs() // Setup TabLayout


    } // End - OnCreate


    // Start - TabLayout
    private fun setUpTabs() {
        val adapter = ViewPagerAdapter(supportFragmentManager)
        adapter.addFragment(MainTabFragment(), \"MainTab\")
        viewPager_tabLayout.adapter = adapter
        tabs.setupWithViewPager(viewPager_tabLayout)
    } // End - TabLayout


} // End - Class

详细活动.kt

class DetailActivity : AppCompatActivity() {

    var prodBundle: Bundle? = null // Initialize getString (bundle) from MainActivity
    private var urls = arrayOfNulls<String>(3) // Initialize URL Direction

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_single_product)


        // Start - WebView URL to WebViewActivity
        urls[0] = \"google.com\"
        urls[1] = \"youtube.com\"
        urls[2] = \"gmail.com\"
        // End - WebView URL to WebViewActivity


        initView() // Setup getString from RecyclerView Main Activity


    } // End - OnCreate


    // Start - getString from RecyclerView Main Activity
    fun initView() {
        prodBundle = intent.extras

        ph_titleText.text = prodBundle?.getString(\"TitleText\")
       ph_descText.text = prodBundle?.getString(\"DescText\")
        prodBundle?.getString(\"ImageURL\").let {
            Glide.with(this).asBitmap()
                .load(it)
                .into(ph_urlImage)

            Glide.with(this).asBitmap()
                .load(it)
                .centerCrop()
                .fitCenter()
                .placeholder(R.drawable.ph_img_none)
                .diskCacheStrategy(DiskCacheStrategy.NONE)
                .skipMemoryCache(true)
        }
    } //  End  - getString from RecyclerView Main Activity

    
    // Start - putExtra to WebViewActivity
    fun button2(view: View) {
        val i = Intent(this@DetailActivity, WebViewActivity::class.java)
        i.putExtra(\"linksWeView\", urls[0])
        startActivity(i)
    } // End - putExtra to WebViewActivity

} // End - Class

WebViewActivity.kt

class WebViewActivity : AppCompatActivity() {


    private lateinit var webView: WebView // Initialize WebView


    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_webview)


        // Start - Assign getString URL from DetailActivity
        val intent = intent
        val webSite = intent.getStringExtra(\"linksWebView\")
        // End - Assign getString URL from DetailActivity


        // Start - WebView
        webView = findViewById(R.id.wv)

        webView.setWebViewClient(object : WebViewClient() {
            override fun onPageStarted(view: WebView?, url: String?, favicon: Bitmap?) {
                super.onPageStarted(view, url, favicon)
                view?.visibility = View.INVISIBLE

                if (Build.VERSION.SDK_INT >= 19) {
                    webView.setLayerType(View.LAYER_TYPE_HARDWARE, null)
                } else {
                    webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null)
                }
            }

            override fun onPageFinished(view: WebView?, url: String?) {
                super.onPageFinished(view, url)
                view?.visibility = View.VISIBLE
            }

            // Start - Fix SocialMedia Acces
            override fun shouldOverrideUrlLoading(wv: WebView, url: String): Boolean {
                if (url.startsWith(\"tel:\") || url.startsWith(\"whatsapp:\")) {
                    val intent = Intent(Intent.ACTION_VIEW)
                    intent.data = Uri.parse(url)
                    startActivity(intent)
                    webView.goBack()
                    return true
                }
                return false
            } // End - Fix SocialMedia Acces

        }) // End - WebView


        // Start - WebView Setting
        if (webSite != null) {
            webView.loadUrl(webSite)
        }

        val webSettings = webView.settings
        webSettings.javaScriptEnabled = true // js active
        webSettings.domStorageEnabled = true // componenet load
        webSettings.allowContentAccess = true
        webSettings.loadsImagesAutomatically = true
        webSettings.cacheMode = WebSettings.LOAD_NO_CACHE
        webSettings.setRenderPriority(WebSettings.RenderPriority.HIGH)
        webSettings.setEnableSmoothTransition(true)
        // End - WebView Setting


}// End - OnCreate

  
} // End - Class

MainTabFragment.kt

class MainTabFragment : Fragment() {


    lateinit var maintabfragmentAdapter: MainTabFragmentAdapter  // Initialize Adapter
    private val sLM = StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL) // Initialize layoutManager
    val addMainTabFragmentModelList: MutableList<MainTabFragmentModel> = ArrayList() // Initialize listModel
    private var urlMainTabFragment = arrayOfNulls<String>(2) // Initialize URL Direction WebView

    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        return inflater.inflate(R.layout.fragment_maintab, container, false)


    }


    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        // Start - Webview URL to WebViewActivity
        urlMainTabFragment[0] = \"https://url1.com\"
        urlMainTabFragment[1] = \"https://url2.com\"
        // End - Webview URL to WebViewActivity


        initViewMainTabFragment() // SetUp initView listModel
        actionMainTabFragment() // SetUp actionMainTabFragment
        iniRefreshListener() // SetUp swipeRefresh


    } // End - OnCreate


    // Start - intView listModel
    private fun initViewMainTabFragment() {
        rv_maintabfragment.layoutManager = sLM
        maintabfragmentAdapter = MainTabFragmentAdapter(requireActivity())
        rv_maintabfragment.adapter = maintabfragmentAdapter

        addMainTabFragmentModelList.add(
            MainTabFragmentModel(\"https://url1.com/img1.jpg\", \"TitleText#01\", \"DescText#01\"))
        addMainTabFragmentModelList.add(
           MainTabFragmentModel(\"https://url1.com/img1.jpg\", \"TitleText#02\", \"DescText#02\"))
        addMainTabFragmentModelList.add(
            MainTabFragmentModel(\"https://url1.com/img1.jpg\", \"TitleText#03\", \"DescText#03\"))
        addMainTabFragmentModelList.add(
            MainTabFragmentModel(\"https://url1.com/img1.jpg\", \"TitleText#04\", \"DescText#04\"))

        maintabfragmentAdapter.setMainTabFragment(addMainTabFragmentModelList)
    } // End - intView listModel


    // Start - putExtra to DetailActivity
    fun actionMainTabFragment() {
        maintabfragmentAdapter.setOnClickItemListenerMainTabFragment(object : OnItemClickListener {
            override fun onItemClick(item: View, position: Int) {
                lateinit var i: Intent
                if (position == 0) {
                    i = Intent(context, WebViewActivity::class.java)
                    i.putExtra(\"linksWebView\", urlMainTabFragment[0])
                } else if (position == 3) {
                    i = Intent(context, WebViewActivity::class.java)
                    i.putExtra(\"linksWebView\", urlMainTabFragment[1])
                } else {
                    i = Intent(context, DetailActivity::class.java)
                }
                i.putExtra(\"TitleText\",
                    maintabfragmentAdapter.getMainTabFragment().get(position).titleTtextMainTab
                )
                i.putExtra(
                    \"DescText\",
                    maintabfragmentAdapter.getMainTabFragment().get(position).descTextMainTab
                )
                i.putExtra(
                    \"ImageURL\",
                    maintabfragmentAdapter.getMainTabFragment().get(position).imgMainTab
                )
                startActivity(i)
            }
        })
    } // End - putExtra to DetailActivity


} // End - Class

MainTabModel.kt

data class MainTabModel (var imgMainTab: String?, var titleTtextMainTab: String?, var descTextMainTab: String?)

OnItemClickListener.kt

interface OnItemClickListener {
    fun onItemClick(item: View, position:Int)
}

MianTabAdapter.kt

class MainTabAdapter(private val context: Context) :
    RecyclerView.Adapter<MainTabAdapter.MainTabViewHolder>() {

    private val MainTabModel: MutableList<MainTabModel> = mutableListOf()  // Initialize listModel
    private lateinit var onSelectedListenerMainTab: OnItemClickListener // Initialize onItemListener


    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MainTabViewHolder {
        return MainTabViewHolder(
            LayoutInflater.from(context).inflate(R.layout.item_maintab_layout, parent, false)
        )
    } // End - onCreateViewHolder

    
    override fun getItemCount(): Int {
        return MainTabModel.size
    }  // End - getItem

    
    override fun onBindViewHolder(holder: MainTabViewHolder, position: Int) {
        holder.maintabBindView(MainTabModel[position])
    } // End - onBindViewHolder

    
    // Start - setMainTab
    fun setMainTab(data: List<MainTabModel>) {
        MainTabModel.clear()
        MainTabModel.addAll(data)
        notifyDataSetChanged()
    } // End - setMainTab

    
    // Start - getMainTab
    fun getMainTab(): MutableList<MainTabModel> {
        return MainTabModel
    } // End - getMainTab

    
    // Start - MainTabViewHolder
    inner class MainTabViewHolder(maintabview: View) : RecyclerView.ViewHolder(maintabview) {
        val imgProdMainTab = maintabview.findViewById<ImageView>(R.id.iv_prodMainTab)
        val cvMainTab: MaterialCardView = maintabview.findViewById(R.id.cv_maintab)
        
        fun maintabBindView(MainTabModel: MainTabModel) {
            MainTabModel.apply {
                val image = MainTabModel.prodImgMainTab
                image.let {
                    Glide.with(itemView.context).asBitmap()
                        .load(it)
                        .into(imgProdMainTab)
                    
                    Glide.with(itemView.context).asBitmap()
                        .load(it)
                        .centerCrop()
                        .fitCenter()
                        .placeholder(R.drawable.ph_img_none)
                        .diskCacheStrategy(DiskCacheStrategy.NONE)
                        .skipMemoryCache(true)
                        .transition(BitmapTransitionOptions.withCrossFade())
                }
            }
        }
        
        // Start - onClick
        init {
            cvMainTab.setOnClickListener { onSelectedListenerMainTab.onItemClick(it, layoutPosition) }
        } // End - onClick
        
    } // End - MainTabBindViewHolder


    // Start - OnItemListener
    fun setOnClickItemListenerMainTab(onItemClickListener: OnItemClickListener) {
        this.onSelectedListenerMainTab = onItemClickListener
    } // End - OnItemListener


} // End - Class

我希望我的解释不会让你感到困惑，因为我不太确定我的问题和线框图是否能解释我的意思。所以，希望有人帮我解决这个问题。

非常感谢您抽出宝贵的时间来帮助我解决这个问题。 :)

＃编辑。！

我发现这个 youtube 视频 start at 33:45 的情况相同，但是在这个视频中使用 java .. 有人可以解释一下 kotlin 版本吗？

标签： android kotlin android-recyclerview

【解决方案1】：

根据视频，

如果要在默认浏览器中打开

在这种情况下，我们需要使用意图告诉意图你需要一个动作视图然后设置您的数据并开始活动

所以它将类似于以下内容

val intent = Intent(Intent.ACTION_VIEW)
intent.setData(Uri.parse(my_url_here))
startActivity(intent)

只需将 my_url_here 替换为您要打开的 URL

【讨论】：