{"id":1172,"date":"2021-02-26T11:11:26","date_gmt":"2021-02-26T03:11:26","guid":{"rendered":"https:\/\/badgameshow.com\/fly\/?p=1172"},"modified":"2023-02-03T10:03:52","modified_gmt":"2023-02-03T02:03:52","slug":"%f0%9f%93%b1%e3%80%90android%e3%80%91mvvm%e5%ae%8c%e6%95%b4%e6%9e%b6%e6%a7%8b%e7%af%84%e4%be%8b-%e5%9f%ba%e7%a4%8e%e5%af%ab%e6%b3%95%e8%88%87%e5%9f%ba%e7%a4%8e%e7%94%a8%e6%b3%95%f0%9f%92%bb","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/fly\/%f0%9f%93%b1%e3%80%90android%e3%80%91mvvm%e5%ae%8c%e6%95%b4%e6%9e%b6%e6%a7%8b%e7%af%84%e4%be%8b-%e5%9f%ba%e7%a4%8e%e5%af%ab%e6%b3%95%e8%88%87%e5%9f%ba%e7%a4%8e%e7%94%a8%e6%b3%95%f0%9f%92%bb\/","title":{"rendered":"\ud83d\udcf1\u3010Android\u3011MVVM \u5b8c\u6574\u67b6\u69cb\u7bc4\u4f8b \u57fa\u790e\u5beb\u6cd5\u8207\u57fa\u790e\u7528\u6cd5\ud83d\udcbb"},"content":{"rendered":"

\ud83d\udcf1\u3010Android\u3011MVVM \u5b8c\u6574\u67b6\u69cb\u7bc4\u4f8b \u57fa\u790e\u5beb\u6cd5\u8207\u57fa\u790e\u7528\u6cd5\ud83d\udcbb<\/h1>\n

MVVM (Model-View-ViewModel) \u662f\u4e00\u7a2e\u8edf\u4ef6\u8a2d\u8a08\u6a21\u5f0f\uff0c\u4e3b\u8981\u7528\u65bc\u5728 Android \u61c9\u7528\u958b\u767c\u4e2d\u3002\u5b83\u662f\u4e00\u7a2e\u67b6\u69cb\u6a21\u5f0f\uff0c\u5206\u96e2\u4e86\u61c9\u7528\u7a0b\u5e8f\u7684\u754c\u9762\uff08\u8996\u5716\uff09\u548c\u696d\u52d9\u908f\u8f2f\uff08\u6a21\u578b\uff09\uff0c\u4e26\u901a\u904e ViewModel \u5c07\u5b83\u5011\u9023\u63a5\u5728\u4e00\u8d77\u3002\u9019\u6a23\uff0c\u958b\u767c\u4eba\u54e1\u53ef\u4ee5\u66f4\u52a0\u8f15\u677e\u5730\u7ba1\u7406\u61c9\u7528\u7a0b\u5e8f\u7684\u4ee3\u78bc\uff0c\u4e26\u63d0\u9ad8\u4ee3\u78bc\u7684\u53ef\u7dad\u8b77\u6027\u548c\u53ef\u6e2c\u8a66\u6027\u3002<\/h4>\n
\n

\u6587\u7ae0\u76ee\u9304<\/h4>\n
    \n
  1. \u5c0e\u5165Library<\/a><\/li>\n
  2. \u5275\u5efaRetrofitUtil<\/a><\/li>\n
  3. API Service & data class<\/a><\/li>\n
  4. Model\u5c64(\u5c08\u5fc3\u53d6\u5f97\u6578\u64da)<\/a><\/li>\n
  5. ViewModel\u5c64(\u5c08\u5fc3\u53d6\u5f97Model\u5c64\u7684\u6578\u64da\u4e26\u4e14\u53d6\u5f97UI\u6240\u9700\u8cc7\u6599)<\/a><\/li>\n
  6. View\u5c64(\u8207VM\u5c64\u7d81\u5b9a \u9054\u5230\u6578\u64da\u8b8a\u52d5\u5c31\u66f4\u65b0UI)<\/a><\/li>\n
  7. \u4f7f\u7528DataBinding XML\u5ba3\u544aViewModel<\/a><\/li>\n
  8. \u6548\u679c\u5c55\u793a<\/a><\/li>\n<\/ol>\n
    \n

    <\/a><\/p>\n

    1.\u5c0e\u5165Library<\/h4>\n
    DataBinding<\/h5>\n
    buildFeatures {\n    dataBinding true\n}\n<\/code><\/pre>\n
    Retrofit & GsonCovert & Coroutine<\/h5>\n
    implementation 'com.squareup.retrofit2:retrofit:2.9.0'\nimplementation 'com.squareup.retrofit2:converter-gson:2.9.0'\nimplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.4.1'\n<\/code><\/pre>\n
    AndroidManifest\u7db2\u8def\u6b0a\u9650<\/h5>\n
    <uses-permission android:name=\"android.permission.INTERNET\"\/>\n<\/code><\/pre>\n
    <\/a><\/p>\n
    2.\u5275\u5efaRetrofitUtil<\/h4>\n
    class RetrofitUtil {\n\n    private val retrofit = Retrofit.Builder()\n        .baseUrl(\"https:\/\/gank.io\/api\/\")\n        .addConverterFactory(GsonConverterFactory.create())\n        .build()\n\n    companion object {\n        val instance : RetrofitUtil by lazy { RetrofitUtil() }\n    }\n\n    fun <T> getService(clazz: Class<T>) = retrofit.create(clazz)\n}\n<\/code><\/pre>\n
    <\/a><\/p>\n
    3.API Service & data class<\/h4>\n
    API Service<\/h5>\n
    interface GirlService {\n    @GET(\"v2\/data\/category\/Girl\/type\/Girl\/page\/1\/count\/10\")\n    suspend fun getGirl() : HttpResult\n}\n<\/code><\/pre>\n
    data class<\/h5>\n
    data class HttpResult(val data: List<Girl>)\ndata class Girl(val images: List<String>, val title: String)\n<\/code><\/pre>\n
    <\/a><\/p>\n
    4.Model\u5c64(\u5c08\u5fc3\u53d6\u5f97\u6578\u64da)<\/h4>\n
    class PersonModel {\n\n    interface OnDataReadyCallback {\n        fun onDataReady(result: HttpResult)\n    }\n\n    fun changeData(callback: OnDataReadyCallback) {\n        CoroutineScope(Dispatchers.IO).launch {\n            val girl = RetrofitUtil.instance\n                .getService(GirlService::class.java)\n                .getGirl()\n\n            withContext(Dispatchers.Main) {\n                callback.onDataReady(girl)\n            }\n        }\n    }\n}\n<\/code><\/pre>\n
    <\/a><\/p>\n
    5.ViewModel\u5c64(\u5c08\u5fc3\u53d6\u5f97Model\u5c64\u7684\u6578\u64da\u4e26\u4e14\u53d6\u5f97UI\u6240\u9700\u8cc7\u6599)<\/h4>\n
    class UserViewModel : ViewModel() {\n\n    private val personModel = PersonModel()\n    var account = MutableLiveData<String>()\n    val password = MutableLiveData<String>()\n\n    fun getData() {\n        personModel.changeData(object : PersonModel.OnDataReadyCallback {\n            override fun onDataReady(result: HttpResult) {\n                account.value = result.data[0].title\n                password.value = result.data[1].title\n            }\n        })\n    }\n}\n<\/code><\/pre>\n
    <\/a><\/p>\n
    6.View\u5c64(\u8207VM\u5c64\u7d81\u5b9a \u9054\u5230\u6578\u64da\u8b8a\u52d5\u5c31\u66f4\u65b0UI)<\/h4>\n
    class MainActivity : AppCompatActivity() {\n\n    lateinit var userViewModel: UserViewModel\n\n    override fun onCreate(savedInstanceState: Bundle?) {\n        super.onCreate(savedInstanceState)\n\n        val binding: ActivityMainBinding =\n            DataBindingUtil.setContentView(this, R.layout.activity_main)\n\n        userViewModel =\n            ViewModelProvider.AndroidViewModelFactory(application).create(UserViewModel::class.java)\n        binding.viewModel = userViewModel\n        binding.lifecycleOwner = this\n    }\n\n    fun login(view: View) {\n        Toast.makeText(\n            this,\n            \"{userViewModel.account.value} \\n<\/span>{userViewModel.password.value}\",\n            Toast.LENGTH_SHORT\n        ).show()\n    }\n\n    fun getData(view: View) {\n        userViewModel.getData()\n    }\n}\n<\/code><\/pre>\n
    <\/a><\/p>\n
    7.\u4f7f\u7528DataBinding XML\u5ba3\u544aViewModel<\/h4>\n
    <?xml version=\"1.0\" encoding=\"utf-8\"?>\n<layout xmlns:android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\n    xmlns:app=\"http:\/\/schemas.android.com\/apk\/res-auto\"\n    xmlns:tools=\"http:\/\/schemas.android.com\/tools\">\n\n    <data>\n        <variable\n            name=\"viewModel\"\n            type=\"fly.com.mvvm.UserViewModel\" \/>\n    <\/data>\n\n    <androidx.constraintlayout.widget.ConstraintLayout\n        android:layout_width=\"match_parent\"\n        android:layout_height=\"match_parent\"\n        tools:context=\".MainActivity\">\n\n        <Button\n            android:id=\"@+id\/button\"\n            android:layout_width=\"wrap_content\"\n            android:layout_height=\"wrap_content\"\n            android:layout_marginTop=\"32dp\"\n            android:onClick=\"login\"\n            android:text=\"\u767b\u5165\"\n            app:layout_constraintEnd_toEndOf=\"parent\"\n            app:layout_constraintStart_toStartOf=\"parent\"\n            app:layout_constraintTop_toBottomOf=\"@+id\/passwordEdit\" \/>\n\n        <EditText\n            android:id=\"@+id\/accountEdit\"\n            android:layout_width=\"wrap_content\"\n            android:layout_height=\"wrap_content\"\n            android:layout_marginTop=\"32dp\"\n            android:ems=\"10\"\n            android:hint=\"\u8acb\u8f38\u5165\u5e33\u865f\"\n            android:text=\"@={viewModel.account}\"\n            app:layout_constraintEnd_toEndOf=\"@+id\/button\"\n            app:layout_constraintStart_toStartOf=\"@+id\/button\"\n            app:layout_constraintTop_toTopOf=\"parent\" \/>\n\n        <EditText\n            android:id=\"@+id\/passwordEdit\"\n            android:layout_width=\"wrap_content\"\n            android:layout_height=\"wrap_content\"\n            android:layout_marginTop=\"32dp\"\n            android:ems=\"10\"\n            android:hint=\"\u8acb\u8f38\u5165\u5bc6\u78bc\"\n            android:text=\"@={viewModel.password}\"\n            app:layout_constraintEnd_toEndOf=\"@+id\/button\"\n            app:layout_constraintHorizontal_bias=\"0.504\"\n            app:layout_constraintStart_toStartOf=\"@+id\/button\"\n            app:layout_constraintTop_toBottomOf=\"@+id\/accountEdit\" \/>\n\n        <TextView\n            android:id=\"@+id\/textView2\"\n            android:layout_width=\"wrap_content\"\n            android:layout_height=\"wrap_content\"\n            android:layout_marginTop=\"32dp\"\n            android:text=\"@{viewModel.account}\"\n            app:layout_constraintStart_toStartOf=\"@+id\/passwordEdit\"\n            app:layout_constraintTop_toBottomOf=\"@+id\/button\" \/>\n\n        <TextView\n            android:id=\"@+id\/textView3\"\n            android:layout_width=\"wrap_content\"\n            android:layout_height=\"wrap_content\"\n            android:layout_marginTop=\"32dp\"\n            android:text=\"@{viewModel.password}\"\n            app:layout_constraintEnd_toEndOf=\"@+id\/passwordEdit\"\n            app:layout_constraintTop_toBottomOf=\"@+id\/button\" \/>\n\n        <Button\n            android:id=\"@+id\/button2\"\n            android:layout_width=\"wrap_content\"\n            android:layout_height=\"wrap_content\"\n            android:layout_marginTop=\"16dp\"\n            android:text=\"\u53d6\u8cc7\u6599\"\n            android:onClick=\"getData\"\n            app:layout_constraintEnd_toEndOf=\"@+id\/textView3\"\n            app:layout_constraintStart_toStartOf=\"@+id\/textView2\"\n            app:layout_constraintTop_toBottomOf=\"@+id\/textView3\" \/>\n\n    <\/androidx.constraintlayout.widget.ConstraintLayout>\n<\/layout>\n<\/code><\/pre>\n
    <\/a><\/p>\n
    8.\u6548\u679c\u5c55\u793a<\/h4>\n
    <\/a><\/p>\n\n
    <\/div>","protected":false},"excerpt":{"rendered":"
    \ud83d\udcf1\u3010Android\u3011MVVM \u5b8c\u6574\u67b6\u69cb\u7bc4\u4f8b \u57fa\u790e\u5beb\u6cd5\u8207\u57fa\u790e\u7528\u6cd5\ud83d\udcbb MVVM (Model-View-ViewM … <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"pgc_sgb_lightbox_settings":"","footnotes":""},"categories":[5],"tags":[13,15,174],"class_list":["post-1172","post","type-post","status-publish","format-standard","hentry","category-android","tag-android","tag-kotlin","tag-mvvm"],"_links":{"self":[{"href":"https:\/\/badgameshow.com\/fly\/wp-json\/wp\/v2\/posts\/1172","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/fly\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/fly\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/fly\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/fly\/wp-json\/wp\/v2\/comments?post=1172"}],"version-history":[{"count":8,"href":"https:\/\/badgameshow.com\/fly\/wp-json\/wp\/v2\/posts\/1172\/revisions"}],"predecessor-version":[{"id":1833,"href":"https:\/\/badgameshow.com\/fly\/wp-json\/wp\/v2\/posts\/1172\/revisions\/1833"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/fly\/wp-json\/wp\/v2\/media?parent=1172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/fly\/wp-json\/wp\/v2\/categories?post=1172"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/fly\/wp-json\/wp\/v2\/tags?post=1172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}