{"id":649,"date":"2025-11-14T01:52:28","date_gmt":"2025-11-14T01:52:28","guid":{"rendered":"https:\/\/boochlin.com\/?p=649"},"modified":"2025-11-12T12:18:55","modified_gmt":"2025-11-12T12:18:55","slug":"kotlin-%e5%a6%82%e4%bd%95%e9%a0%90%e9%98%b2-launch-%e9%80%a3%e7%99%bc%ef%bc%8c%e6%90%9c%e5%b0%8b%e4%bb%bb%e5%8b%99","status":"publish","type":"post","link":"https:\/\/boochlin.com\/?p=649","title":{"rendered":"Kotlin \u5982\u4f55\u9810\u9632 Launch \u9023\u767c\uff0c\u641c\u5c0b\u4efb\u52d9"},"content":{"rendered":"<p>\u4e0d\u7ba1\u8655\u7406\u4f55\u7a2e\u554f\u984c\uff0c\u6211\u5011\u90fd\u5fc5\u9808\u8003\u616e\u662f\u51fa\u65bc\u4f55\u7a2e\u5834\u666f\uff0c\u5c31\u50cf\u662f<\/p>\n<blockquote class=\"wp-block-quote\"><p>\u4f7f\u7528\u8005\u5728 1 \u79d2\u5167\u9ede\u4e86 10 \u6b21\u3002\u7531\u65bc launch \u7684\u5929\u6027\u662f\u300c<strong>\u5c04\u5f8c\u4e0d\u7406 (fire-and-forget)<\/strong>\u300d\uff0c\u4f60\u7684 App \u4e5f\u6703\u5fe0\u5be6\u5730\u555f\u52d5 10 \u500b\u7368\u7acb\u7684 Coroutine\uff0c\u767c\u8d77 10 \u6b21\u7db2\u8def\u8acb\u6c42\u3002<\/p><\/blockquote>\n<p>\u9019\u6a23\u770b\u8d77\u4f86\u554f\u984c\u662f \u4e0d\u60f3\u8981\u540c\u6642\u8dd1\u5341\u6b21\u4efb\u52d9\uff0c\u90a3\u70ba\u4f55\u4e0d\u60f3\u8981\uff1f\u5982\u679c\u4e0d\u60f3\u8981\u662f\u70ba\u5565\uff1f\u662f\u70ba\u4e86\u89e3\u6c7a\u5565\u60c5\u5883\u9047\u5230\u7684\u554f\u984c<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<p>\u8981\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff0c\u6211\u5011\u6709\u5e7e\u500b\u5c64\u6b21\u7684\u7b56\u7565\uff1a<\/p>\n<ol start=\"1\">\n<li><strong>UI \u5c64<\/strong> \u5728 launch \u958b\u59cb\u6642\u7acb\u523b\u8a2d\u5b9a button.isEnabled = false\uff0c\u4e26\u5728 finally \u5340\u584a\u4e2d\u5c07\u5b83\u8a2d\u56de true\u3002\u9019\u662f\u6700\u76f4\u89c0\u7684\u9632\u79a6\uff0c\u76f4\u63a5\u963b\u6b62\u4e86\u4f7f\u7528\u8005\u767c\u8d77\u65b0\u4efb\u52d9\u7684\u53ef\u80fd\u3002<\/li>\n<li><strong>Job \u5c64<\/strong> launch \u6703\u8fd4\u56de\u4e00\u500b Job \u7269\u4ef6\uff0c\u4f60\u53ef\u4ee5\u628a\u5b83\u60f3\u50cf\u6210\u9019\u500b\u4efb\u52d9\u7684\u300c\u9059\u63a7\u5668\u300d\u3002\u9059\u63a7\u5668\u53ef\u4ee5\u63a7\u5236\u4efb\u52d9\u3002<\/li>\n<li>Flow\u5c64 \uff0c\u5982\u679c\u662f\u58f9\u9023\u4e32\u6539\u8b8a\u7684\u6d41\u7a0b\uff0c\u90a3\u80af\u5b9a\u6709\u53ef\u4ee5\u4fee\u6539\u7684\u90e8\u5206<\/li>\n<\/ol>\n<p>\u5e95\u4e0b\u6211\u5011\u5f9e\u5834\u666f\u4f86\u5206\u6790\u600e\u9ebc\u6539\uff1f<\/p>\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n<h2 class=\"wp-block-heading\"><strong>\u300c\u641c\u5c0b\u300d\u529f\u80fd \u2014 \u6211\u53ea\u95dc\u5fc3\u6700\u65b0\u7684\u7d50\u679c<\/strong><\/h2>\n<p>\u5728\u641c\u5c0b\u9019\u7a2e\u5834\u666f\uff0c\u4f7f\u7528\u8005\u5728\u77ed\u6642\u9593\u5167\u5feb\u901f\u8f38\u5165 &#8220;A&#8221;\u3001&#8221;AP&#8221;\u3001&#8221;APP&#8221;\u3001&#8221;APPL&#8221;\u3001&#8221;APPLE&#8221;\uff0c\u6211\u5011\u5176\u5be6\u53ea\u95dc\u5fc3\u6700\u5f8c &#8220;APPLE&#8221; \u7684\u641c\u5c0b\u7d50\u679c\u3002\u524d\u9762\u5e7e\u6b21\u7684\u8acb\u6c42\uff0c\u4e0d\u50c5\u6d6a\u8cbb\u8cc7\u6e90\uff0c\u5982\u679c\u820a\u7684\u7d50\u679c\u6bd4\u65b0\u7684\u7d50\u679c\u665a\u56de\u4f86\uff0c\u9084\u6703\u8986\u84cb\u6389\u6b63\u78ba\u7684\u641c\u5c0b\u7d50\u679c\u3002<\/p>\n<p><strong>\u5982\u679c\u820a\u4efb\u52d9\u9084\u5728\u8dd1\uff0c\u5c31\u53d6\u6d88\u5b83\uff0c\u7acb\u523b\u958b\u59cb\u65b0\u4efb\u52d9\u3002<\/strong><\/p>\n<h3 class=\"wp-block-heading\"><strong>Kotlin Job<\/strong><\/h3>\n<pre class=\"wp-block-code\"><code>\/\/ \u5728\u4f60\u7684 ViewModel \u6216 Presenter \u4e2d\nprivate var searchJob: Job? = null\n\nfun onSearchQueryChanged(query: String) {\n    \/\/ 1. \u5982\u679c\u4e0a\u4e00\u500b\u641c\u5c0b\u4efb\u52d9 (searchJob) \u9084\u5728\u57f7\u884c\u4e2d\uff0c\u5c31\u53d6\u6d88\u5b83\uff01\n    searchJob?.cancel()\n\n    \/\/ 2. \u555f\u52d5\u4e00\u500b\u5168\u65b0\u7684 Coroutine \u4f86\u8655\u7406\u9019\u6b21\u7684\u641c\u5c0b\u8acb\u6c42\n    searchJob = lifecycleScope.launch {\n        try {\n            \/\/ \u6a21\u64ec\u7db2\u8def\u5ef6\u9072\n            delay(1000)\n            val result = apiService.search(query)\n            _uiState.value = result \/\/ \u66f4\u65b0 UI\n        } catch (e: CancellationException) {\n            \/\/ \u7576 Job \u88ab cancel \u6642\u6703\u62cb\u51fa\u9019\u500b\u7570\u5e38\uff0c\u9019\u662f\u6b63\u5e38\u7684\u6d41\u7a0b\uff0c\u53ef\u4ee5\u4e0d\u7528\u8655\u7406\n            Log.i(\"SearchJob\", \"Job for query '$query' was cancelled.\")\n        } catch (e: Exception) {\n            \/\/ \u8655\u7406\u5176\u4ed6\u771f\u5be6\u7684\u932f\u8aa4\n            _uiState.value = \"Error: ${e.message}\"\n        }\n    }\n}\n<\/code><\/pre>\n<h3 class=\"wp-block-heading\"><strong>Kotlin <\/strong>Flow<\/h3>\n<h3 class=\"wp-block-heading\">\u7b49\u4ed6\u505c\u6b62\u8f38\u5165\u4e00\u5c0f\u6bb5\u6642\u9593\u5f8c\u3002debounce<\/h3>\n<pre class=\"wp-block-code\"><code>\/\/ \u5728\u4f60\u7684 ViewModel \u4e2d\nviewModelScope.launch {\n    \/\/ \u5047\u8a2d clicksFlow \u662f\u5f9e\u4f60\u7684 UI \u6309\u9215\u9ede\u64ca\u4e8b\u4ef6\u8f49\u63db\u800c\u4f86\u7684 Flow\n    clicksFlow\n        .debounce(300L) \/\/ \u53ea\u6709\u7576 300 \u6beb\u79d2\u5167\u6c92\u6709\u65b0\u7684\u9ede\u64ca\u6642\uff0c\u624d\u8b93\u6700\u65b0\u7684\u4e8b\u4ef6\u901a\u904e\n        .onEach { query -&gt;\n            \/\/ \u5728\u9019\u88e1\uff0cquery \u5c31\u662f\u901a\u904e\u4e86 debounce \u8003\u9a57\u7684\u6700\u7d42\u641c\u5c0b\u95dc\u9375\u5b57\n            _uiState.value = \"\u6b63\u5728\u641c\u5c0b: $query\"\n            \/\/ \u89f8\u767c\u7db2\u8def\u8acb\u6c42\n            val result = apiService.search(query)\n            _uiState.value = result\n        }\n        .catch { throwable -&gt;\n            \/\/ \u512a\u96c5\u5730\u8655\u7406\u4e0a\u6e38\u6216 onEach \u4e2d\u767c\u751f\u7684\u4efb\u4f55\u932f\u8aa4\n            _uiState.value = \"Error: ${throwable.message}\"\n        }\n        .launchIn(viewModelScope) \/\/ \u5728 viewModelScope \u4e2d\u555f\u52d5\u9019\u500b Flow \u7684\u6536\u96c6\n}\n\n<\/code><\/pre>\n<h3 class=\"wp-block-heading\">\u53ea\u95dc\u5fc3\u6700\u65b0\u8f38\u5165\u7684\u7d50\u679c (transformLatest)<\/h3>\n<pre class=\"wp-block-code\"><code>viewModelScope.launch {\n    clicksFlow\n        \/\/ mapLatest \u662f transformLatest \u7684\u7c21\u5316\u7248\n        .mapLatest { query -&gt;\n            \/\/ \u7576\u65b0\u7684 query \u9032\u4f86\u6642\uff0c\u524d\u4e00\u500b\u5c1a\u672a\u5b8c\u6210\u7684 apiService.search \u6703\u88ab\u81ea\u52d5\u53d6\u6d88\n            apiService.search(query)\n        }\n        .catch { ... }\n        .collect { result -&gt;\n            \/\/ \u9019\u88e1\u6536\u5230\u7684\u6c38\u9060\u662f\u6700\u65b0 query \u5c0d\u61c9\u7684\u7d50\u679c\n            _uiState.value = result\n        }\n}\n\n<\/code><\/pre>\n<h2 class=\"wp-block-heading\"><strong>\u300c\u4ed8\u6b3e\u300d\u6309\u9215 \u2014 \u95dc\u9375\u64cd\u4f5c\u4e0d\u5bb9\u6253\u65b7<\/strong><\/h2>\n<p>\u5c0d\u65bc\u50cf\u300c\u78ba\u8a8d\u4ed8\u6b3e\u300d\u3001\u300c\u9001\u51fa\u8a02\u55ae\u300d\u9019\u7a2e\u4e00\u6b21\u6027\u7684\u95dc\u9375\u64cd\u4f5c\uff0c\u6211\u5011\u7d55\u4e0d\u5e0c\u671b\u5b83\u88ab\u4e2d\u9014\u53d6\u6d88\u3002\u800c\u4e14\uff0c\u5728\u7b2c\u4e00\u6b21\u9ede\u64ca\u7684\u4efb\u52d9\u9084\u6c92\u5b8c\u6210\u524d\uff08\u4f8b\u5982\uff0c\u9084\u5728\u8ddf\u9280\u884c\u4f3a\u670d\u5668\u6e9d\u901a\uff09\uff0c\u6211\u5011\u61c9\u8a72\u5ffd\u7565\u6240\u6709\u5f8c\u7e8c\u7684\u9ede\u64ca\uff0c\u907f\u514d\u91cd\u8907\u4e0b\u55ae\u3002<\/p>\n<p><strong>\u5982\u679c\u4efb\u52d9\u6b63\u5728\u57f7\u884c\u4e2d\uff0c\u5c31\u5ffd\u7565\u6240\u6709\u65b0\u7684\u9ede\u64ca\u8acb\u6c42\u3002<\/strong><\/p>\n<h3 class=\"wp-block-heading\"><strong>Kotlin Job<\/strong><\/h3>\n<pre class=\"wp-block-code\"><code>\/\/ \u5728\u4f60\u7684 ViewModel \u6216 Presenter \u4e2d\nprivate var paymentJob: Job? = null\n\nfun onPayButtonClicked() {\n    \/\/ 1. \u6aa2\u67e5 paymentJob \u662f\u5426\u5b58\u5728\uff0c\u4e26\u4e14\u662f\u5426\u9084\u5728\u6d3b\u8e8d\u72c0\u614b (isActive)\n    if (paymentJob?.isActive == true) {\n        \/\/ 2. \u5982\u679c\u662f\uff0c\u8868\u793a\u4e0a\u6b21\u7684\u4ed8\u6b3e\u6d41\u7a0b\u9084\u6c92\u8dd1\u5b8c\uff0c\u76f4\u63a5 return\uff0c\u4e0d\u505a\u4efb\u4f55\u4e8b\u3002\n        Log.d(\"PaymentJob\", \"Payment is already in progress. Ignoring new click.\")\n        return\n    }\n\n    \/\/ 3. \u5982\u679c\u6c92\u6709\u6b63\u5728\u9032\u884c\u7684\u4efb\u52d9\uff0c\u5c31\u555f\u52d5\u4e00\u500b\u65b0\u7684 Coroutine\n    paymentJob = lifecycleScope.launch {\n        try {\n            _uiState.value = \"\u8655\u7406\u4e2d...\" \/\/ \u986f\u793a\u8655\u7406\u4e2d\u72c0\u614b\n            button.isEnabled = false \/\/ \u540c\u6642\u642d\u914d UI \u9632\u5b88\n\n            \/\/ \u6a21\u64ec\u4e00\u500b\u7121\u6cd5\u88ab\u53d6\u6d88\u7684\u95dc\u9375\u7db2\u8def\u8acb\u6c42\n            val result = withContext(NonCancellable) {\n                apiService.processPayment()\n            }\n\n            _uiState.value = \"\u4ed8\u6b3e\u6210\u529f\uff01\" \/\/ \u66f4\u65b0 UI\n        } catch (e: Exception) {\n            _uiState.value = \"\u4ed8\u6b3e\u5931\u6557: ${e.message}\"\n        } finally {\n            button.isEnabled = true \/\/ \u7121\u8ad6\u5982\u4f55\uff0c\u6700\u5f8c\u90fd\u8981\u6062\u5fa9\u6309\u9215\u72c0\u614b\n        }\n    }\n}<\/code><\/pre>\n<h3 class=\"wp-block-heading\"><strong>Kotlin <\/strong>Flow<\/h3>\n<pre class=\"wp-block-code\"><code>\/\/ \u5728 ViewModel \u4e2d\n\n\/\/ 1. \u4e00\u500b\u300c\u5fd9\u788c\u4fe1\u865f\u71c8\u300d\uff0c\u7528\u4f86\u6a19\u8a18\u662f\u5426\u6b63\u5728\u8655\u7406\u4ed8\u6b3e\nprivate val isProcessing = MutableStateFlow(false)\n\n\/\/ 2. \u4e00\u500b\u300c\u9ede\u64ca\u89f8\u767c\u5668\u300d\uff0cUI \u5c64\u53ea\u9700\u8981\u547c\u53eb\u5b83\u4f86\u767c\u9001\u9ede\u64ca\u4e8b\u4ef6\n\/\/     \u4f7f\u7528 SharedFlow\uff0c\u56e0\u70ba\u6211\u5011\u53ef\u80fd\u6709\u591a\u500b\u5730\u65b9\u9700\u8981\u89f8\u767c\u6216\u76e3\u807d\nprivate val paymentTrigger = MutableSharedFlow&lt;Unit&gt;()\n\n\/\/ 3. \u5728 ViewModel \u521d\u59cb\u5316\u6642\uff0c\u8a2d\u5b9a\u597d\u76e3\u807d\u548c\u8655\u7406\u908f\u8f2f\ninit {\n    viewModelScope.launch {\n        paymentTrigger.collect {\n            \/\/ \u6bcf\u6b21\u9ede\u64ca\u4e8b\u4ef6\u89f8\u767c\u6642\uff0c\u5148\u6aa2\u67e5\u300c\u4fe1\u865f\u71c8\u300d\n            if (isProcessing.value) {\n                \/\/ \u5982\u679c\u662f\u7d05\u71c8\uff08\u6b63\u5fd9\uff09\uff0c\u76f4\u63a5 return\uff0c\u5ffd\u7565\u9019\u6b21\u89f8\u767c\n                return@collect \n            }\n\n            \/\/ \u5982\u679c\u662f\u7da0\u71c8\uff08\u7a7a\u9592\uff09\uff0c\u7acb\u523b\u5207\u63db\u70ba\u7d05\u71c8\uff0c\u4e26\u958b\u59cb\u5de5\u4f5c\n            isProcessing.value = true\n            try {\n                _uiState.value = \"\u8655\u7406\u4e2d...\"\n                val result = apiService.processPayment()\n                _uiState.value = \"\u4ed8\u6b3e\u6210\u529f\uff01\"\n            } catch (e: Exception) {\n                _uiState.value = \"\u4ed8\u6b3e\u5931\u6557: ${e.message}\"\n            } finally {\n                \/\/ \u7121\u8ad6\u6210\u529f\u6216\u5931\u6557\uff0c\u5de5\u4f5c\u7d50\u675f\u5f8c\uff0c\u90fd\u8981\u628a\u4fe1\u865f\u71c8\u5207\u56de\u7da0\u71c8\n                isProcessing.value = false \n            }\n        }\n    }\n}\n\n\/\/ 4. UI \u5c64\u53ea\u9700\u8981\u547c\u53eb\u9019\u500b\u7c21\u55ae\u7684\u51fd\u5f0f\nfun onPayButtonClicked() {\n    viewModelScope.launch {\n        paymentTrigger.emit(Unit)\n    }\n}<\/code><\/pre>\n<p>&#8212;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e0d\u7ba1\u8655\u7406\u4f55\u7a2e\u554f\u984c\uff0c\u6211\u5011\u90fd\u5fc5\u9808\u8003\u616e\u662f\u51fa\u65bc\u4f55\u7a2e\u5834\u666f\uff0c\u5c31\u50cf\u662f \u4f7f\u7528\u8005\u5728 1 \u79d2\u5167\u9ede\u4e86 10 \u6b21\u3002\u7531\u65bc launch \u7684\u5929\u6027\u662f\u300c\u5c04\u5f8c\u4e0d\u7406 (fire-and-forget)\u300d\uff0c\u4f60\u7684 App \u4e5f\u6703\u5fe0\u5be6\u5730\u555f\u52d5 1&#8230;<\/p>\n","protected":false},"author":1,"featured_media":850,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[81],"tags":[],"_links":{"self":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/649"}],"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=649"}],"version-history":[{"count":8,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/649\/revisions"}],"predecessor-version":[{"id":851,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/posts\/649\/revisions\/851"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=\/wp\/v2\/media\/850"}],"wp:attachment":[{"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=649"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=649"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/boochlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=649"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}