{"id":1297,"date":"2026-09-14T14:57:52","date_gmt":"2026-09-14T14:57:52","guid":{"rendered":"https:\/\/boochlin.com\/?p=1297"},"modified":"2026-09-14T15:27:33","modified_gmt":"2026-09-14T15:27:33","slug":"funny-vote-app-modern-android-%e7%95%ab%e9%9d%a2%e5%be%a9%e5%88%bb%e8%88%87%e5%be%8c%e7%ab%af%e6%96%b7%e7%82%8a%e9%9b%9c%e8%a8%98%ef%bc%88%e5%9b%9b%ef%bc%89","status":"publish","type":"post","link":"https:\/\/boochlin.com\/?p=1297","title":{"rendered":"Funny vote APP \u2013 \u70ba\u4e86\u89e3\u6c7a\u72c0\u614b\u6253\u67b6\uff1a\u76f4\u4e0a MVI \u55ae\u5411\u6d41\u8207\u62ef\u6551\u767d\u5c4f\u707d\u96e3\uff08\u56db\uff09"},"content":{"rendered":"

\u4e0a\u4e00\u7bc7\u6211\u5011\u804a\u5230\u544a\u5225 XML\u3001\u8df3\u9032 Jetpack Compose \u4e4b\u5f8c\u7684\u75db\u82e6\u8207\u751c\u871c\u3002\u6211\u5011\u7528 @Immutable<\/code> \u99b4\u670d\u4e86\u52d5\u4e0d\u52d5\u5c31\u5168\u91cf\u91cd\u7e6a\u7684\u7de8\u8b6f\u5668\uff0c\u4e5f\u628a\u5217\u8868\u6ed1\u52d5\u5e40\u7387\u7a69\u7a69\u9396\u5728 120Hz\u3002\u4f46\u7576\u756b\u9762\u4e0d\u518d\u5361\u9813\u4e4b\u5f8c\uff0c\u53e6\u4e00\u500b\u8b93\u6240\u6709 Android \u5de5\u7a0b\u5e2b\u982d\u76ae\u767c\u9ebb\u7684\u5e7d\u9748\u6d6e\u51fa\u4e86\u6c34\u9762\uff1a\u756b\u9762\u4e0a\u7684\u72c0\u614b\u958b\u59cb\u4e92\u76f8\u6253\u67b6<\/strong>\u3002<\/p>\n

\u9019\u4e0d\u662f\u5728\u958b\u73a9\u7b11\u3002\u7576\u4f60\u628a\u50b3\u7d71 MVVM \u90a3\u5957\u300c\u5728 ViewModel \u88e1\u5230\u8655\u958b StateFlow\u300d\u7684\u5beb\u6cd5\u642c\u5230\u5ba3\u544a\u5f0f UI \u4e0a\u6642\uff0c\u53ea\u8981\u7db2\u8def\u7a0d\u5fae\u5ef6\u9072\u3001\u6216\u8005\u4f7f\u7528\u8005\u624b\u901f\u592a\u5feb\uff0c\u756b\u9762\u5c31\u6703\u9677\u5165\u7cbe\u795e\u5206\u88c2\u3002\u9019\u7bc7\u5c31\u4f86\u6df1\u5165\u804a\u804a\uff0c\u6211\u5011\u5728 2024 \u5e74\u7684 mvi-rewrite<\/code> \u5206\u652f\u88e1\uff0c\u662f\u600e\u9ebc\u5f9e\u72c0\u614b\u6253\u67b6\u7684\u6ce5\u6f6d\u4e2d\u722c\u51fa\u4f86\uff0c\u4e26\u4e00\u6b65\u6b65\u6253\u9020\u51fa\u5805\u56fa\u5982\u9435\u7684 MVI \u55ae\u5411\u8cc7\u6599\u6d41\u3002<\/p>\n

\n

\u4e00\u3001 \u7ffb\u8eca\u73fe\u5834\uff1a\u4e94\u500b\u5404\u81ea\u70ba\u653f\u7684 StateFlow<\/h2>\n

\u6211\u5011\u5148\u9084\u539f\u4e00\u4e0b\u525b\u5f9e MVP \u8f49\u9032 MVVM \u6642\uff0c\u5927\u90e8\u5206\u5de5\u7a0b\u5e2b\uff08\u5305\u62ec\u6211\uff09\u662f\u600e\u9ebc\u5beb ViewModel \u7684\u3002<\/p>\n

\u90a3\u6642\u5019\u6211\u5011\u89ba\u5f97\uff0c\u65e2\u7136\u6bcf\u500b UI \u5143\u4ef6\u9700\u8981\u4e0d\u540c\u7684\u8cc7\u6599\uff0c\u90a3\u5c31\u70ba\u6bcf\u500b\u72c0\u614b\u5404\u958b\u4e00\u500b\u6c34\u9f8d\u982d\u561b\uff1a<\/p>\n

\/\/ \u770b\u4f3c\u5408\u60c5\u5408\u7406\u3001\u5be6\u5247\u6697\u85cf\u6bba\u6a5f\u7684 MVVM \u5beb\u6cd5\nclass HomeViewModel @Inject constructor(\n    private val voteRepository: VoteRepository\n) : ViewModel() {\n    \/\/ \u6c34\u9f8d\u982d\u4e00\u865f\uff1a\u63a7\u5236\u9032\u5ea6\u689d\n    private val _isLoading = MutableStateFlow(false)\n    val isLoading = _isLoading.asStateFlow()\n\n    \/\/ \u6c34\u9f8d\u982d\u4e8c\u865f\uff1a\u4e3b\u8981\u7684\u6295\u7968\u5217\u8868\n    private val _votes = MutableStateFlow<List<VoteWithDetails>>(emptyList())\n    val votes = _votes.asStateFlow()\n\n    \/\/ \u6c34\u9f8d\u982d\u4e09\u865f\uff1a\u932f\u8aa4\u8a0a\u606f\n    private val _errorMessage = MutableStateFlow<String?>(null)\n    val errorMessage = _errorMessage.asStateFlow()\n\n    \/\/ \u6c34\u9f8d\u982d\u56db\u865f\uff1a\u76ee\u524d\u9078\u4e2d\u7684\u5206\u9801\u6a19\u7c64\n    private val _selectedTab = MutableStateFlow(0)\n    val selectedTab = _selectedTab.asStateFlow()\n\n    fun refreshVotes() {\n        viewModelScope.launch {\n            _isLoading.value = true\n            try {\n                val data = voteRepository.fetchVotesFromNetwork()\n                _votes.value = data\n                _errorMessage.value = null\n            } catch (e: Exception) {\n                _errorMessage.value = \"\u7db2\u8def\u9023\u7dda\u7570\u5e38\uff0c\u8acb\u7a0d\u5f8c\u518d\u8a66\"\n            } finally {\n                _isLoading.value = false\n            }\n        }\n    }\n}<\/code><\/pre>\n
\u5728\u5341\u5e74\u524d\u7684 XML \u6642\u4ee3\uff0c\u9019\u6bb5\u4ee3\u78bc\u52c9\u5f37\u80fd\u6df7\u904e\u53bb\u3002\u4f46\u5728 Compose \u5ba3\u544a\u5f0f UI \u9019\u7a2e\u300c\u6bcf 16 \u6beb\u79d2\u90fd\u5728\u91cd\u65b0\u8a55\u4f30\u756b\u9762\u300d\u7684\u74b0\u5883\u4e0b\uff0c\u9019\u6bb5\u4ee3\u78bc\u7c21\u76f4\u662f\u5b9a\u6642\u70b8\u5f48\u3002<\/p>\n
\u70ba\u4ec0\u9ebc\uff1f\u56e0\u70ba\u9019\u56db\u500b StateFlow \u662f\u975e\u540c\u6b65\u4e14\u5f7c\u6b64\u7368\u7acb\u767c\u5c04\u7684<\/strong>\uff01\u5728\u5354\u7a0b\u57f7\u884c\u7dd2\u5207\u63db\u7684\u5fae\u5c0f\u6642\u9593\u5dee\u88e1\uff0cCompose \u91cd\u7d44\u6a5f\u5236\u6703\u7cbe\u6e96\u6355\u6349\u5230\u90a3\u4e9b\u6211\u5011\u6839\u672c\u6c92\u60f3\u904e\u7684\u4e2d\u9593\u7e2b\u9699\uff1a<\/p>\n
    \n
  1. \u8f49\u5708\u5708\u6d88\u5931\u4e86\uff0c\u4f46\u8cc7\u6599\u9084\u6c92\u5230<\/strong>\uff1a\u7576\u7db2\u8def\u8acb\u6c42\u525b\u7d50\u675f\uff0c_isLoading.value = false<\/code> \u5148\u88ab Compose \u6536\u5230\uff0c\u4f46 _votes.value = data<\/code> \u9084\u5361\u5728\u4e0b\u4e00\u500b\u8abf\u5ea6\u9031\u671f\u3002\u4f7f\u7528\u8005\u6703\u770b\u5230\u756b\u9762\u4e0a\u7684\u8f49\u5708\u5708\u7a81\u7136\u6d88\u5931\uff0c\u63a5\u8457\u87a2\u5e55\u9583\u904e\u5341\u6beb\u79d2\u7684\u300c\u7a7a\u7a7a\u5982\u4e5f\u300d\uff0c\u7136\u5f8c\u8cc7\u6599\u624d\u731b\u7136\u5f48\u51fa\u4f86\u3002\u9019\u5c31\u662f\u6700\u5178\u578b\u7684\u756b\u9762\u6495\u88c2\u8207\u9583\u720d<\/strong>\u3002<\/li>\n
  2. \u932f\u8aa4\u8a0a\u606f\u8ddf\u820a\u8cc7\u6599\u649e\u5728\u4e00\u8d77<\/strong>\uff1a\u5982\u679c\u4e0b\u62c9\u5237\u65b0\u5931\u6557\uff0c_errorMessage<\/code> \u767c\u5c04\u4e86\u932f\u8aa4\u6587\u5b57\uff0c\u4f46 _votes<\/code> \u4f9d\u7136\u4fdd\u7559\u8457\u4e94\u5206\u9418\u524d\u7684\u820a\u8cc7\u6599\u3002\u756b\u9762\u4e0a\u540c\u6642\u51fa\u73fe\u4e86\u300c\u5217\u8868\u6b63\u5e38\u986f\u793a\u300d\u8207\u300c\u7db2\u8def\u9023\u7dda\u5931\u6557\u300d\u7684\u8352\u8b2c\u77db\u76fe\u72c0\u614b\u3002<\/li>\n
  3. \u72c0\u614b\u7d44\u5408\u7206\u70b8<\/strong>\uff1a\u56db\u500b\u7368\u7acb\u7684\u5e03\u6797\u503c\u8207\u53ef\u7a7a\u8b8a\u6578\uff0c\u7406\u8ad6\u4e0a\u53ef\u4ee5\u7d44\u51fa 2^4 = 16<\/code> \u7a2e\u4e0d\u540c\u7684\u72c0\u614b\u7d44\u5408\u3002\u8eab\u70ba\u958b\u767c\u8005\uff0c\u4f60\u6839\u672c\u4e0d\u53ef\u80fd\u4fdd\u8b49\u9019 16 \u7a2e\u72c0\u614b\u5728\u756b\u9762\u4e0a\u90fd\u4e0d\u6703\u6253\u67b6\u3002<\/li>\n<\/ol>\n
    \u9019\u4e0d\u53eb\u97ff\u61c9\u5f0f\u7de8\u7a0b\uff0c\u9019\u53eb\u628a\u756b\u9762\u7684\u63a7\u5236\u6b0a\u4ea4\u7d66\u904b\u6c23\u3002<\/p>\n
    \n
    \u4e8c\u3001 \u6279\u99c1\u516c\u7248\u6559\u7a0b\u7684\u300c\u73a9\u5177\u67b6\u69cb\u300d\uff1a\u5225\u518d\u7121\u8166\u7528 Sealed Class \u641e\u767d\u5c4f\u4e86<\/h2>\n
    \u7576\u5de5\u7a0b\u5e2b\u767c\u73fe\u72c0\u614b\u6703\u6253\u67b6\u4e4b\u5f8c\uff0c\u7b2c\u4e00\u53cd\u61c9\u901a\u5e38\u662f\u53bb\u7ffb Google \u6216 Medium \u4e0a\u7684\u6559\u5b78\u6587\u7ae0\u3002\u7136\u5f8c\u4f60\u5c31\u6703\u770b\u5230\u5343\u7bc7\u4e00\u5f8b\u7684\u7d93\u5178\u89e3\u7b54\uff1a\u300c\u5927\u5bb6\u4e0d\u8981\u958b\u591a\u500b StateFlow\uff0c\u6539\u7528 Kotlin \u7684 Sealed Class \u5c01\u88dd\u6210\u55ae\u4e00\u72c0\u614b\u4e0d\u5c31\u641e\u5b9a\u4e86\u55ce\uff1f\u300d<\/p>\n
    \/\/ \u7db2\u8def\u4e0a\u96a8\u8655\u53ef\u898b\u7684\u300c\u73a9\u5177\u67b6\u69cb\u300d\nsealed class HomeUiState {\n    object Idle : HomeUiState()\n    object Loading : HomeUiState()\n    data class Success(val votes: List<VoteWithDetails>) : HomeUiState()\n    data class Error(val message: String) : HomeUiState()\n}<\/code><\/pre>\n
    \u9019\u7a2e\u5beb\u6cd5\u5728\u5beb Demo \u6216\u9762\u8a66\u5237\u984c\u6642\u770b\u8d77\u4f86\u7121\u61c8\u53ef\u64ca\uff0c\u67b6\u69cb\u7d14\u6de8\u5f97\u50cf\u85dd\u8853\u54c1\u3002\u4f46\u5728\u771f\u5be6\u7684\u5546\u696d\u7522\u54c1\u88e1\uff0c\u5982\u679c\u7167\u6284\u9019\u5957\u67b6\u69cb\uff0c\u7522\u54c1\u7d93\u7406\u9694\u5929\u5c31\u6703\u63d0\u8457\u5200\u4f86\u627e\u4f60\u3002<\/p>\n
    \u70ba\u4ec0\u9ebc\uff1f\u8acb\u60f3\u50cf\u4e00\u4e0b\u9019\u500b\u65e5\u5e38\u5834\u666f\uff1a<\/p>\n
    \u4f7f\u7528\u8005\u6b63\u5728\u770b\u71b1\u9580\u6295\u7968\u5217\u8868\uff08\u6b64\u6642\u72c0\u614b\u662f Success<\/code>\uff09\u3002\u9019\u6642\u5019\u4ed6\u624b\u6307\u5411\u4e0b\u4e00\u62c9\uff0c\u60f3\u8981\u5237\u65b0\u6700\u65b0\u7968\u6578\u3002ViewModel \u6536\u5230\u6307\u4ee4\uff0c\u7b2c\u4e00\u4ef6\u4e8b\u5c31\u662f\u628a\u72c0\u614b\u5207\u63db\u6210 HomeUiState.Loading<\/code>\u3002<\/p>\n
    \u9019\u6642\u5019\u756b\u9762\u6703\u767c\u751f\u4ec0\u9ebc\u4e8b\uff1f<\/strong><\/p>\n
    \u56e0\u70ba Loading<\/code> \u88e1\u9762\u6839\u672c\u6c92\u6709\u593e\u5e36\u65e2\u6709\u7684 votes<\/code> \u8cc7\u6599\uff0cCompose \u4e00\u770b\u5230\u72c0\u614b\u8b8a\u6210 Loading<\/code>\uff0c\u53ea\u80fd\u628a\u6574\u5f35\u5217\u8868\u5f9e\u756b\u9762\u4e0a\u62d4\u6389\uff0c\u63db\u6210\u4e00\u9846\u5b64\u96f6\u96f6\u7684\u83ca\u82b1\u8f49\u5708\u5708\uff01\u7b49\u5230\u4e09\u79d2\u5f8c\u7db2\u8def\u56de\u4f86\u8b8a\u6210 Success<\/code>\uff0c\u5217\u8868\u624d\u53c8\u731b\u7136\u91cd\u65b0\u756b\u51fa\u4f86\uff01<\/p>\n
    \u9019\u5c31\u662f\u6975\u5176\u696d\u9918\u7684\u767d\u5c4f\u9583\u9000\u611f<\/strong>\u3002\u5728\u6210\u719f\u7684\u79fb\u52d5\u7aef\u7522\u54c1\u88e1\uff0c\u4e0b\u62c9\u5237\u65b0\u5fc5\u9808\u662f\u5728\u65e2\u6709\u6e05\u55ae\u7684\u4e0a\u65b9\u6ed1\u51fa\u4e00\u500b\u5c0f\u9032\u5ea6\u689d\uff0c\u5e95\u4e0b\u7684\u5167\u5bb9\u5fc5\u9808\u7a69\u5982\u6cf0\u5c71\u5730\u7559\u5728\u756b\u9762\u4e0a\uff0c\u600e\u9ebc\u53ef\u4ee5\u628a\u4f7f\u7528\u8005\u6b63\u5728\u770b\u7684\u5167\u5bb9\u76f4\u63a5\u62b9\u6389\uff1f<\/p>\n
    \u73a9\u5177\u67b6\u69cb\u7684\u81f4\u547d\u7f3a\u9677\u5728\u65bc\uff1a\u5b83\u628a\u300c\u8cc7\u6599\u672c\u8eab\u300d\u8ddf\u300c\u8cc7\u6599\u7684\u52a0\u8f09\u52d5\u4f5c\u300d\u7c97\u66b4\u5730\u4e92\u65a5\u7d81\u6b7b\u5728\u4e00\u8d77<\/strong>\u3002\u4f60\u4e0d\u80fd\u56e0\u70ba\u7cfb\u7d71\u6b63\u5728\u52a0\u8f09\uff0c\u5c31\u5047\u88dd\u4f7f\u7528\u8005\u4e4b\u524d\u770b\u5230\u7684\u8cc7\u6599\u4e0d\u5b58\u5728\u3002<\/p>\n
    \n
    \u4e09\u3001 FunnyVote \u7684\u5be6\u6230\u89e3\u6cd5\uff1a\u55ae\u4e00\u4e0d\u53ef\u8b8a\u72c0\u614b\u5feb\u7167\uff08HomeUiState\uff09<\/h2>\n
    \u70ba\u4e86\u89e3\u6c7a\u767d\u5c4f\u8207\u72c0\u614b\u77db\u76fe\uff0c\u6211\u5011\u5728 HomeContract.kt<\/code> \u88e1\u62cb\u68c4\u4e86\u73a9\u5177\u5f0f\u7684\u4e92\u65a5 Sealed Class\uff0c\u56de\u6b78\u5230\u4e86\u6975\u5ea6\u6210\u719f\u7684\u55ae\u4e00\u4e0d\u53ef\u8b8a Data Class<\/strong>\uff1a<\/p>\n
    \/\/ FunnyVote \u771f\u5be6\u63a1\u7528\u7684\u55ae\u4e00\u4e0d\u53ef\u8b8a\u72c0\u614b\u6a21\u578b\n@Immutable\ndata class HomeUiState(\n    val votes: List<VoteWithDetails> = emptyList(),\n    val popularVotes: List<VoteWithDetails> = emptyList(),\n    val isLoading: Boolean = false,\n    val isRefreshing: Boolean = false,\n    val selectedCategory: String = \"hot\",\n    val searchQuery: String = \"\",\n    val errorMessage: String? = null\n) {\n    \/\/ \u900f\u904e\u884d\u751f\u5c6c\u6027\u512a\u96c5\u5224\u5b9a\u662f\u5426\u8655\u65bc\u5168\u87a2\u5e55\u7a7a\u72c0\u614b\n    val isInitialLoading: Boolean\n        get() = isLoading && votes.isEmpty()\n        \n    val isEmpty: Boolean\n        get() = !isLoading && votes.isEmpty() && errorMessage == null\n}<\/code><\/pre>\n
    \u5927\u5bb6\u4ed4\u7d30\u770b\u9019\u500b\u8a2d\u8a08\u7684\u7cbe\u5999\u4e4b\u8655\uff1a<\/p>\n
      \n
    1. \u589e\u91cf\u8907\u88fd\uff08Incremental Copy\uff09<\/strong>\uff1a\u7576\u4f7f\u7528\u8005\u4e0b\u62c9\u5237\u65b0\u6642\uff0cViewModel \u53ea\u9700\u8981\u547c\u53eb _uiState.update { it.copy(isRefreshing = true) }<\/code>\u3002\u65e2\u6709\u7684 votes<\/code> \u6beb\u9aee\u7121\u50b7\uff0c\u53ea\u6709 isRefreshing<\/code> \u8b8a\u6210 true\u3002Compose \u6536\u5230\u901a\u77e5\uff0c\u53ea\u6703\u5728\u756b\u9762\u4e0a\u65b9\u8f49\u52d5\u4e0b\u62c9\u6307\u793a\u5668\uff0c\u5e95\u4e0b\u7684\u6295\u7968\u5217\u8868\u9023\u52d5\u90fd\u4e0d\u7528\u52d5\u3002<\/li>\n
    2. \u72c0\u614b\u6c38\u4e0d\u6253\u67b6<\/strong>\uff1a\u5728\u4efb\u4f55\u4e00\u500b\u6642\u9593\u9ede\uff0c\u756b\u9762\u4e0a\u6240\u6709\u5143\u4ef6\u770b\u5230\u7684\u90fd\u662f\u540c\u4e00\u5f35\u4e0d\u53ef\u5206\u5272\u7684\u300c\u72c0\u614b\u5feb\u7167\uff08Snapshot\uff09\u300d\u3002\u6c38\u9060\u4e0d\u53ef\u80fd\u51fa\u73fe\u8f49\u5708\u5708\u505c\u4e86\u4f46\u8cc7\u6599\u6c92\u5230\u7684\u4e2d\u9593\u5e7d\u9748\u614b\u3002<\/li>\n
    3. \u4e7e\u6de8\u7684\u696d\u52d9\u884d\u751f<\/strong>\uff1a\u900f\u904e isInitialLoading<\/code>\uff0c\u6211\u5011\u6e05\u695a\u5340\u5206\u4e86\u300c\u9996\u6b21\u9032 App \u7684\u5168\u87a2\u5e55\u9aa8\u67b6\u5c4f\u300d\u8207\u300c\u80cc\u666f\u975c\u9ed8\u5237\u65b0\u7684\u5c40\u90e8\u8f49\u5708\u300d\uff0c\u908f\u8f2f\u4e00\u6e05\u4e8c\u695a\u3002<\/li>\n<\/ol>\n
      \n
      \u56db\u3001 \u610f\u5716\u986f\u5f0f\u5316\uff08HomeIntent\uff09\uff1a\u8b93\u6240\u6709\u4f7f\u7528\u8005\u64cd\u4f5c\u4e56\u4e56\u6392\u968a<\/h2>\n
      \u641e\u5b9a\u72c0\u614b\u4e4b\u5f8c\uff0c\u63a5\u4e0b\u4f86\u8981\u6536\u62fe\u7684\u662f\u300c\u4f7f\u7528\u8005\u7684\u52d5\u4f5c\u300d\u3002<\/p>\n
      \u4ee5\u524d\u5728 ViewModel \u88e1\uff0c\u6211\u5011\u901a\u5e38\u6703\u958b\u51fa\u5341\u5e7e\u4e8c\u5341\u500b public \u51fd\u5f0f\uff1aonTabSelected()<\/code>\u3001onSearchChanged()<\/code>\u3001onFavoriteClicked()<\/code>\u3001retry()<\/code>\u3002\u53ea\u8981\u5c08\u6848\u8b8a\u5927\uff0cViewModel \u5c31\u8b8a\u6210\u4e00\u500b\u5927\u96dc\u71f4\uff0c\u4f60\u6839\u672c\u4e0d\u77e5\u9053\u9019\u4e9b\u51fd\u5f0f\u662f\u88ab\u8ab0\u5728\u4ec0\u9ebc\u6642\u6a5f\u9ede\u547c\u53eb\u7684\u3002<\/p>\n
      \u5728 MVI \u7684\u7cbe\u795e\u4e0b\uff0c\u6211\u5011\u628a\u6240\u6709\u4f7f\u7528\u8005\u5728\u756b\u9762\u4e0a\u80fd\u505a\u7684\u4e8b\u60c5\uff0c\u5168\u90e8\u6536\u6582\u6210\u5f37\u578b\u5225\u7684\u5bc6\u5c01\u4ecb\u9762 HomeIntent<\/code>\uff1a<\/p>\n
      \/\/ \u9996\u9801\u6240\u6709\u64cd\u4f5c\u7684\u552f\u4e00\u5ba3\u544a\u8655\nsealed interface HomeIntent {\n    data class SelectCategory(val category: String) : HomeIntent\n    data class UpdateSearchQuery(val query: String) : HomeIntent\n    data class ToggleFavorite(val voteCode: String) : HomeIntent\n    data object Refresh : HomeIntent\n    data object LoadMore : HomeIntent\n    data object Retry : HomeIntent\n}<\/code><\/pre>\n
      \u5728 HomeViewModel<\/code> \u5167\u90e8\uff0c\u6240\u6709\u7684\u5c0d\u5916\u7a97\u53e3\u88ab\u6536\u6582\u6210\u552f\u4e00\u7684\u5165\u53e3\u9ede processIntent(intent: HomeIntent)<\/code>\uff1a<\/p>\n
      \/\/ \u6240\u6709\u52d5\u4f5c\u7d71\u4e00\u5206\u767c\u8207\u8655\u7406\nfun processIntent(intent: HomeIntent) {\n    when (intent) {\n        is HomeIntent.SelectCategory -> handleSelectCategory(intent.category)\n        is HomeIntent.UpdateSearchQuery -> handleSearchQuery(intent.query)\n        is HomeIntent.ToggleFavorite -> handleToggleFavorite(intent.voteCode)\n        is HomeIntent.Refresh -> refreshVotes()\n        is HomeIntent.LoadMore -> loadNextPage()\n        is HomeIntent.Retry -> retryLoading()\n    }\n}<\/code><\/pre>\n
      \u9019\u5957\u8a2d\u8a08\u7684\u723d\u5ea6\u5728\u65bc\u6392\u67e5\u9664\u932f\u6642\u7684\u6975\u81f4\u7d14\u7cb9<\/strong>\u3002\u6bcf\u7576\u5be6\u9ad4\u6a5f\u56de\u5831\u67d0\u500b\u8a6d\u7570\u7684 Bug\uff0c\u6211\u53ea\u9700\u8981\u5728 processIntent<\/code> \u7684\u958b\u982d\u5370\u4e00\u884c Log\u3002\u53ea\u8981\u770b\u8457 Intent \u7684\u767c\u5c04\u9806\u5e8f\uff0c\u6574\u5957\u696d\u52d9\u908f\u8f2f\u5c31\u50cf\u653e\u96fb\u5f71\u91cd\u64ad\u4e00\u6a23\uff0c\u6e05\u6e05\u695a\u695a\uff0c\u5b8c\u5168\u4e0d\u9700\u8981\u5728\u5404\u500b\u51fd\u5f0f\u4e4b\u9593\u4e0b\u65b7\u9ede\u778e\u731c\u3002<\/p>\n
      \n
      \u4e94\u3001 \u4e00\u6b21\u6027\u526f\u4f5c\u7528\u7684\u6551\u8d16\uff1a\u70ba\u4ec0\u9ebc\u62cb\u68c4 SharedFlow \u6539\u7528 Channel\uff1f<\/h2>\n
      \u641e\u5b9a State \u8207 Intent \u4e4b\u5f8c\uff0cMVI \u7684\u6700\u5f8c\u4e00\u584a\u62fc\u5716\u662f\uff1a\u4e00\u6b21\u6027\u526f\u4f5c\u7528\uff08UiEffect\uff09<\/strong>\u3002<\/p>\n
      \u6709\u4e9b\u4e8b\u60c5\u672c\u8cea\u4e0a\u4e0d\u662f\u300c\u72c0\u614b\u300d\uff0c\u800c\u662f\u300c\u4e8b\u4ef6\u300d\u3002\u4f8b\u5982\uff1a\u5f48\u51fa\u4e00\u500b Toast\u3001\u986f\u793a SnackBar\u3001\u6216\u662f\u8df3\u8f49\u5230\u6295\u7968\u8a73\u60c5\u9801\u3002\u9019\u4e9b\u52d5\u4f5c\u53ea\u61c9\u8a72\u767c\u751f\u4e00\u6b21\uff0c\u4e0d\u80fd\u56e0\u70ba\u4f7f\u7528\u8005\u628a\u624b\u6a5f\u6a6b\u904e\u4f86\u653e\uff0c\u5c31\u91cd\u65b0\u57f7\u884c\u4e00\u904d\u3002<\/p>\n
      \u7db2\u8def\u4e0a\u5f88\u591a\u6587\u7ae0\u6703\u6559\u4f60\u7528 MutableSharedFlow(replay = 0)<\/code> \u4f86\u8655\u7406\u4e8b\u4ef6\u3002\u4f46\u9019\u53c8\u662f\u53e6\u4e00\u500b\u5927\u5751\uff1a<\/p>\n
      \u5982\u679c\u4f7f\u7528 SharedFlow<\/code>\uff0c\u7576\u4f7f\u7528\u8005\u65cb\u8f49\u87a2\u5e55\u7684\u90a3\u5e7e\u767e\u6beb\u79d2\u88e1\uff0cActivity \u6b63\u5728\u92b7\u6bc0\u91cd\u5efa\uff0cComposable \u66ab\u6642\u53d6\u6d88\u4e86\u5c0d Flow \u7684\u6536\u96c6\u3002\u5982\u679c\u9019\u6642\u5019\u80cc\u666f\u5354\u7a0b\u525b\u597d\u767c\u5c04\u4e86\u4e00\u500b\u300c\u6295\u7968\u6210\u529f\u300d\u7684\u5c0e\u822a\u4e8b\u4ef6\uff0c\u9019\u500b\u4e8b\u4ef6\u5c31\u6703\u50cf\u6f51\u51fa\u53bb\u7684\u6c34\u4e00\u6a23\uff0c\u76f4\u63a5\u6d88\u5931\u5728\u592a\u7a7a\u4e2d\uff0c\u4f7f\u7528\u8005\u88ab\u5361\u5728\u539f\u5730\u4e0d\u77e5\u6240\u63aa<\/strong>\uff01<\/p>\n
      \u70ba\u4e86\u675c\u7d55\u4e1f\u5931\u4e8b\u4ef6\u7684\u60b2\u5287\uff0c\u6211\u5011\u5728 HomeViewModel<\/code> \u63a1\u7528\u4e86\u5177\u5099\u80cc\u58d3\u7de9\u885d\u6a5f\u5236\u7684 Channel<\/code>\uff1a<\/p>\n
      \/\/ \u7528\u5177\u5099\u7de9\u885d\u7684 Channel \u515c\u4f4f\u6240\u6709\u4e00\u6b21\u6027\u4e8b\u4ef6\nsealed interface HomeUiEffect {\n    data class ShowToast(val message: String) : HomeUiEffect\n    data class NavigateToDetail(val voteCode: String) : HomeUiEffect\n    data class NavigateToLogin(val returnRoute: String) : HomeUiEffect\n}\n\nclass HomeViewModel @Inject constructor(...) : ViewModel() {\n    \/\/ \u4f7f\u7528 BUFFERED Channel\uff0c\u78ba\u4fdd UI \u91cd\u5efa\u671f\u9593\u4e8b\u4ef6\u4e0d\u6703\u88ab\u5403\u6389\n    private val _effectChannel = Channel<HomeUiEffect>(Channel.BUFFERED)\n    val effect: Flow<HomeUiEffect> = _effectChannel.receiveAsFlow()\n\n    private fun handleVoteSubmitted(voteCode: String) {\n        viewModelScope.launch {\n            _effectChannel.send(HomeUiEffect.ShowToast(\"\u6295\u7968\u6210\u529f\uff01\"))\n            _effectChannel.send(HomeUiEffect.NavigateToDetail(voteCode))\n        }\n    }\n}<\/code><\/pre>\n
      \u5728 UI \u7aef\uff0c\u900f\u904e LaunchedEffect<\/code> \u914d\u5408 Lifecycle.repeatOnLifecycle<\/code> \u9032\u884c\u5b89\u5168\u6536\u96c6\uff1a<\/p>\n
      \/\/ \u4e7e\u6de8\u5229\u843d\u7684\u4e8b\u4ef6\u6d88\u8cbb\u7aef\n@Composable\nfun HomeScreen(\n    viewModel: HomeViewModel = hiltViewModel(),\n    navController: NavController\n) {\n    val uiState by viewModel.uiState.collectAsStateWithLifecycle()\n    val context = LocalContext.current\n\n    LaunchedEffect(viewModel.effect) {\n        viewModel.effect.collect { effect ->\n            when (effect) {\n                is HomeUiEffect.ShowToast -> {\n                    Toast.makeText(context, effect.message, Toast.LENGTH_SHORT).show()\n                }\n                is HomeUiEffect.NavigateToDetail -> {\n                    navController.navigate(Screen.Detail.createRoute(effect.voteCode))\n                }\n                is HomeUiEffect.NavigateToLogin -> {\n                    navController.navigate(Screen.Login.route)\n                }\n            }\n        }\n    }\n\n    HomeScreenContent(\n        uiState = uiState,\n        onIntent = viewModel::processIntent\n    )\n}<\/code><\/pre>\n
      \u5229\u7528 Channel.BUFFERED<\/code>\uff0c\u5c31\u7b97\u4f60\u5728\u65cb\u8f49\u87a2\u5e55\u3001\u6253\u6a6b\u653e\u6253\u76f4\u653e\uff0c\u672a\u6d88\u8cbb\u7684\u4e8b\u4ef6\u6703\u8001\u8001\u5be6\u5be6\u8eba\u5728\u7de9\u885d\u4f47\u5217\u88e1\u3002\u7b49\u5230\u65b0\u756b\u9762\u7e6a\u88fd\u5b8c\u6210\uff0c\u4e8b\u4ef6\u7acb\u523b\u9806\u5e8f\u6d88\u8cbb\uff0c\u7d55\u4e0d\u907a\u5931\u3001\u7d55\u4e0d\u91cd\u8907\u3002<\/p>\n
      \n
      \u516d\u3001 \u7d50\u5c3e\uff1a\u67b6\u69cb\u7d14\u6de8\u4e86\uff0c\u4f46\u6211\u7684\u5f37\u8feb\u75c7\u767c\u4f5c\u4e86<\/h2>\n
      \u628a MVI \u67b6\u69cb\u6253\u78e8\u5b8c\u7562\u7684\u90a3\u4e00\u523b\uff0c\u770b\u8457\u55ae\u4e00\u7684 HomeUiState<\/code> \u5728 HomeScreenContent<\/code> \u88e1\u6d41\u8f49\uff0c\u9ede\u64ca\u6309\u9215\u4e95\u7136\u6709\u5e8f\uff0c\u65cb\u8f49\u87a2\u5e55\u7a69\u5982\u6cf0\u5c71\uff0c\u5167\u5fc3\u7684\u6210\u5c31\u611f\u78ba\u5be6\u7121\u6cd5\u8a00\u55bb\u3002<\/p>\n
      \u4f46\u662f\uff0c\u7576\u6211\u628a App \u9000\u56de\u5230\u4e3b\u756b\u9762\uff0c\u51b7\u975c\u5be9\u8996\u6574\u500b\u5c08\u6848\u6642\uff0c\u8eab\u70ba\u539f\u4f5c\u8005\u7684\u5f37\u8feb\u75c7\u53c8\u958b\u59cb\u96b1\u96b1\u4f5c\u75db\u4e86\u3002<\/p>\n
      \u5728 2024 \u5e74\u70ba\u4e86\u8ffd\u6c42 Compose \u8207 MVI \u7684\u67b6\u69cb\u7d14\u5ea6\uff0c\u6211\u5011\u63a1\u53d6\u4e86\u6975\u9650\u7684\u300c\u5782\u76f4\u5207\u7247\u300d\u7b56\u7565\u2014\u2014\u70ba\u4e86\u628a\u6838\u5fc3\u6295\u7968\u8def\u5f91\u8d70\u901a\uff0c\u6211\u5011\u72e0\u5fc3\u780d\u6389\u4e86 2016 \u5e74\u820a\u7248\u7684\u6240\u6709\u65c1\u652f\u7d30\u7bc0\uff1a\u7576\u5e74\u7cbe\u5fc3\u8a2d\u8a08\u7684 6 \u9801\u65b0\u624b\u5c0e\u89bd\u30014 \u500b\u95dc\u65bc\u5b50\u9801\u9762\u3001\u5ba2\u88fd\u5316\u7684\u81ea\u8a02\u5206\u4eab\u5f48\u7a97\uff0c\u901a\u901a\u88ab\u6211\u5011\u66ab\u6642\u64f1\u7f6e\u4e86\u3002<\/p>\n
      \u73fe\u5728\u6838\u5fc3\u67b6\u69cb\u7a69\u56fa\u4e86\uff0c\u6280\u8853\u50b5\u4e5f\u9084\u5f97\u5dee\u4e0d\u591a\u4e86\u3002\u770b\u8457\u9019\u500b\u53ea\u6709\u9aa8\u67b6\u3001\u7f3a\u5c11\u9748\u9b42\u7684\u73fe\u4ee3\u5316 App\uff0c\u6211\u77e5\u9053\u662f\u6642\u5019\u5728 2026 \u5e74\u958b\u51fa modern-android<\/code> \u5206\u652f\uff0c\u4f86\u4e00\u5834\u628a\u9752\u6625\u8207\u56de\u61b6 100% \u627e\u56de\u4f86\u7684\u7121\u640d\u5fa9\u523b\u4e86\u3002<\/p>\n
      \u4e0b\u4e00\u7bc7\uff0c\u6211\u5011\u4f86\u804a\u804a\u600e\u9ebc\u6316\u51fa\u5341\u5e74\u524d\u6a21\u7cca\u4e0d\u582a\u7684 PNG \u50cf\u7d20\u5716\u6a19\u3001\u628a\u5b83\u5011\u91cd\u7e6a\u6210 SVG \u5411\u91cf\uff0c\u4ee5\u53ca\u5c07 30 \u4efd XML \u5beb\u6b7b\u7684\u914d\u8272\u66b4\u529b\u9077\u5f99\u5230 Material 3 \u7684\u9ad4\u529b\u6d3b\u8840\u6dda\u53f2\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u4e0a\u4e00\u7bc7\u6211\u5011\u804a\u5230\u544a\u5225 XML\u3001\u8df3\u9032 Jetpack Compose \u4e4b\u5f8c\u7684\u75db\u82e6\u8207\u751c\u871c\u3002\u6211\u5011\u7528 @Immutabl […]<\/p>\n","protected":false},"author":1,"featured_media":1296,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86,169],"tags":[6,172,179,128],"_links":{"self":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/1297"}],"collection":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1297"}],"version-history":[{"count":2,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/1297\/revisions"}],"predecessor-version":[{"id":1310,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/1297\/revisions\/1310"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/media\/1296"}],"wp:attachment":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1297"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}