{"id":467,"date":"2023-12-22T04:57:17","date_gmt":"2023-10-09T02:04:01","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/android-asynctask%e7%a4%ba%e4%be%8b%e6%95%99%e7%a8%8b\/"},"modified":"2025-08-02T11:52:09","modified_gmt":"2025-08-02T03:52:09","slug":"android-asynctask%e7%a4%ba%e4%be%8b%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/android-asynctask%e7%a4%ba%e4%be%8b%e6%95%99%e7%a8%8b\/","title":{"rendered":"Android\u5f02\u6b65\u4efb\u52a1(AsyncTask)\u5b8c\u6574\u5f00\u53d1\u6559\u7a0b\uff1a\u4ece\u5165\u95e8\u5230\u7cbe\u901a\u7684\u5b9e\u4f8b\u8be6\u89e3"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aAndroid AsyncTask\u793a\u4f8b\u6559\u7a0b\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51711\u90e8\u5206\uff09\u3002<\/p>\n<p>\u4eca\u5929\u6211\u4eec\u8981\u7814\u7a76Android AsyncTask\u3002\u6211\u4eec\u5c06\u5f00\u53d1\u4e00\u4e2aAndroid\u793a\u4f8b\u5e94\u7528\u7a0b\u5e8f\uff0c\u5728\u540e\u53f0\u6267\u884c\u4e00\u4e2a\u62bd\u8c61\u7684AsyncTask\u3002<\/p>\n<h2>Android \u5f02\u6b65\u4efb\u52a1<\/h2>\n<p>Android AsyncTask\u662f\u7531Android\u63d0\u4f9b\u7684\u4e00\u4e2a\u62bd\u8c61\u7c7b\uff0c\u5b83\u4f7f\u6211\u4eec\u53ef\u4ee5\u5728\u540e\u53f0\u6267\u884c\u91cd\u4efb\u52a1\uff0c\u540c\u65f6\u4fdd\u6301UI\u7ebf\u7a0b\u7684\u8f7b\u91cf\u5316\uff0c\u4ece\u800c\u4f7f\u5e94\u7528\u7a0b\u5e8f\u66f4\u52a0\u54cd\u5e94\u3002Android\u5e94\u7528\u5728\u542f\u52a8\u65f6\u53ea\u8fd0\u884c\u5728\u4e00\u4e2a\u7ebf\u7a0b\u4e0a\u3002\u7531\u4e8e\u8fd9\u79cd\u5355\u7ebf\u7a0b\u6a21\u578b\uff0c\u6267\u884c\u9700\u8981\u8f83\u957f\u65f6\u95f4\u6765\u83b7\u53d6\u54cd\u5e94\u7684\u4efb\u52a1\u53ef\u80fd\u4f1a\u4f7f\u5e94\u7528\u7a0b\u5e8f\u65e0\u6cd5\u54cd\u5e94\u3002\u4e3a\u4e86\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\uff0c\u6211\u4eec\u4f7f\u7528android AsyncTask\u5728\u4e13\u7528\u7ebf\u7a0b\u4e0a\u6267\u884c\u91cd\u4efb\u52a1\uff0c\u5e76\u5c06\u7ed3\u679c\u4f20\u9012\u56deUI\u7ebf\u7a0b\u3002\u56e0\u6b64\uff0c\u5728Android\u5e94\u7528\u4e2d\u4f7f\u7528AsyncTask\u59cb\u7ec8\u4f7fUI\u7ebf\u7a0b\u4fdd\u6301\u54cd\u5e94\u3002\u4e0b\u9762\u5b9a\u4e49\u4e86\u5728android AsyncTask\u7c7b\u4e2d\u4f7f\u7528\u7684\u57fa\u672c\u65b9\u6cd5\uff1a<\/p>\n<ul class=\"post-ul\">\n<li><strong>doInBackground()<\/strong> : \u6b64\u65b9\u6cd5\u5305\u542b\u9700\u8981\u5728\u540e\u53f0\u6267\u884c\u7684\u4ee3\u7801\u3002\u5728\u8fd9\u4e2a\u65b9\u6cd5\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7publishProgress()\u65b9\u6cd5\u591a\u6b21\u53d1\u9001\u7ed3\u679c\u5230UI\u7ebf\u7a0b\u3002\u8981\u901a\u77e5\u540e\u53f0\u5904\u7406\u5df2\u5b8c\u6210\uff0c\u6211\u4eec\u53ea\u9700\u8981\u4f7f\u7528return\u8bed\u53e5\u3002<\/li>\n<li><strong>onPreExecute()<\/strong> : \u6b64\u65b9\u6cd5\u5305\u542b\u5728\u540e\u53f0\u5904\u7406\u5f00\u59cb\u524d\u6267\u884c\u7684\u4ee3\u7801\u3002<\/li>\n<li><strong>onPostExecute()<\/strong> : \u6b64\u65b9\u6cd5\u5728doInBackground\u65b9\u6cd5\u5b8c\u6210\u5904\u7406\u540e\u8c03\u7528\u3002doInBackground\u7684\u7ed3\u679c\u5c06\u4f20\u9012\u7ed9\u6b64\u65b9\u6cd5\u3002<\/li>\n<li><strong>onProgressUpdate()<\/strong> : \u6b64\u65b9\u6cd5\u63a5\u6536\u6765\u81eadoInBackground\u65b9\u6cd5\u7684\u8fdb\u5ea6\u66f4\u65b0\uff0c\u8be5\u66f4\u65b0\u901a\u8fc7publishProgress\u65b9\u6cd5\u53d1\u5e03\uff0c\u5e76\u4e14\u6b64\u65b9\u6cd5\u53ef\u4ee5\u4f7f\u7528\u6b64\u8fdb\u5ea6\u66f4\u65b0\u6765\u66f4\u65b0UI\u7ebf\u7a0b\u3002<\/li>\n<\/ul>\n<p>\u5728Android\u7684AsyncTask\u7c7b\u4e2d\uff0c\u6709\u4ee5\u4e0b\u4e09\u79cd\u901a\u7528\u7c7b\u578b\u3002<\/p>\n<ul class=\"post-ul\">\n<li><strong>Params<\/strong> : \u6267\u884c\u4efb\u52a1\u65f6\u53d1\u9001\u7ed9\u4efb\u52a1\u7684\u53c2\u6570\u7c7b\u578b\u3002<\/li>\n<li><strong>Progress<\/strong> : \u540e\u53f0\u8ba1\u7b97\u671f\u95f4\u53d1\u5e03\u7684\u8fdb\u5ea6\u5355\u5143\u7c7b\u578b\u3002<\/li>\n<li><strong>Result<\/strong> : \u540e\u53f0\u8ba1\u7b97\u7ed3\u679c\u7684\u7c7b\u578b\u3002<\/li>\n<\/ul>\n<h3>\u5b89\u5353AsyncTask\u793a\u4f8b<\/h3>\n<p>\u8981\u542f\u52a8\u4e00\u4e2aAsyncTask\uff0c\u5728MainActivity\u7c7b\u4e2d\u5fc5\u987b\u5305\u542b\u4ee5\u4e0b\u4ee3\u7801\u6bb5\uff1a<\/p>\n<pre class=\"post-pre\"><code>MyTask myTask = new MyTask();\r\nmyTask.execute();\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u7247\u6bb5\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u4e00\u4e2a\u6269\u5c55\u4e86AsyncTask\u7c7b\u7684\u793a\u4f8b\u7c7b\u540d\uff0c\u5e76\u4f7f\u7528execute\u65b9\u6cd5\u6765\u542f\u52a8\u540e\u53f0\u7ebf\u7a0b\u3002\u6ce8\u610f\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>AsyncTask\u5b9e\u4f8b\u5fc5\u987b\u5728UI\u7ebf\u7a0b\u4e2d\u521b\u5efa\u548c\u8c03\u7528\u3002<\/li>\n<li>AsyncTask\u7c7b\u4e2d\u88ab\u8986\u76d6\u7684\u65b9\u6cd5\u4e0d\u5e94\u8be5\u88ab\u624b\u52a8\u8c03\u7528\u3002\u5b83\u4eec\u4f1a\u88ab\u81ea\u52a8\u8c03\u7528\u3002<\/li>\n<li>AsyncTask\u53ea\u80fd\u88ab\u8c03\u7528\u4e00\u6b21\u3002\u518d\u6b21\u6267\u884c\u5b83\u5c06\u629b\u51fa\u5f02\u5e38\u3002<\/li>\n<\/ul>\n<p>\u5728\u8fd9\u4e2a\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u5c06\u5b9e\u73b0\u4e00\u4e2aAsyncTask\uff0c\u5b83\u80fd\u8ba9\u8fdb\u7a0b\u6839\u636e\u7528\u6237\u8bbe\u7f6e\u7684\u65f6\u95f4\u6bb5\u8fdb\u5165\u7761\u7720\u72b6\u6001\u3002<\/p>\n<h3>\u5b89\u5353\u5f02\u6b65\u4efb\u52a1\u9879\u76ee\u7ed3\u6784<\/h3>\n<h3>\u5b89\u5353\u5f02\u6b65\u4efb\u52a1\u793a\u4f8b\u4ee3\u7801<\/h3>\n<p>xml\u5e03\u5c40\u5728activity_main.xml\u4e2d\u5b9a\u4e49\uff0c\u5982\u4e0b\u6240\u793a\uff1aactivity_main.xml<\/p>\n<pre class=\"post-pre\"><code>&lt;RelativeLayout xmlns:android=\"https:\/\/schemas.android.com\/apk\/res\/android\"\r\n    xmlns:tools=\"https:\/\/schemas.android.com\/tools\"\r\n    android:layout_width=\"match_parent\"\r\n    android:layout_height=\"match_parent\"\r\n    tools:context=\".MainActivity\" &gt;\r\n\r\n    &lt;TextView\r\n        android:id=\"@+id\/tv_time\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:textSize=\"10pt\"\r\n        android:textColor=\"#444444\"\r\n        android:layout_alignParentLeft=\"true\"\r\n        android:layout_marginRight=\"9dip\"\r\n        android:layout_marginTop=\"20dip\"\r\n        android:layout_marginLeft=\"10dip\"\r\n        android:text=\"\u7761\u7720\u65f6\u95f4\uff08\u79d2\uff09:\"\/&gt;\r\n    &lt;EditText\r\n        android:id=\"@+id\/in_time\"\r\n        android:layout_width=\"150dip\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:background=\"@android:drawable\/editbox_background\"\r\n        android:layout_toRightOf=\"@id\/tv_time\"\r\n        android:layout_alignTop=\"@id\/tv_time\"\r\n        android:inputType=\"number\"\r\n        \/&gt;\r\n    &lt;Button\r\n        android:id=\"@+id\/btn_run\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:text=\"\u8fd0\u884c\u5f02\u6b65\u4efb\u52a1\"\r\n        android:layout_below=\"@+id\/in_time\"\r\n        android:layout_centerHorizontal=\"true\"\r\n        android:layout_marginTop=\"64dp\" \/&gt;\r\n    &lt;TextView\r\n        android:id=\"@+id\/tv_result\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:textSize=\"7pt\"\r\n        android:layout_below=\"@+id\/btn_run\"\r\n        android:layout_centerHorizontal=\"true\" \/&gt;\r\n&lt;\/RelativeLayout&gt;\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u5e03\u5c40\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u9884\u5b9a\u4e49\u7684\u53ef\u7ed8\u5236\u5bf9\u8c61\u4f5c\u4e3aEditText\u7684\u8fb9\u6846\u3002\u4e0b\u9762\u662fMainActivity.java\u7684\u5b9a\u4e49\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.asynctask;\r\n\r\nimport android.app.ProgressDialog;\r\nimport android.os.AsyncTask;\r\nimport android.os.Bundle;\r\nimport android.support.v7.app.AppCompatActivity;\r\nimport android.view.View;\r\nimport android.widget.Button;\r\nimport android.widget.EditText;\r\nimport android.widget.TextView;\r\n\r\npublic class MainActivity extends AppCompatActivity {\r\n    private Button button;\r\n    private EditText time;\r\n    private TextView finalResult;\r\n\r\n    @Override\r\n    protected void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n        setContentView(R.layout.activity_main);\r\n        time = (EditText) findViewById(R.id.in_time);\r\n        button = (Button) findViewById(R.id.btn_run);\r\n        finalResult = (TextView) findViewById(R.id.tv_result);\r\n        button.setOnClickListener(new View.OnClickListener() {\r\n            @Override\r\n            public void onClick(View v) {\r\n                AsyncTaskRunner runner = new AsyncTaskRunner();\r\n                String sleepTime = time.getText().toString();\r\n                runner.execute(sleepTime);\r\n            }\r\n        });\r\n    }\r\n\r\n    private class AsyncTaskRunner extends AsyncTask&lt;String, String, String&gt; {\r\n\r\n        private String resp;\r\n        ProgressDialog progressDialog;\r\n\r\n        @Override\r\n        protected String doInBackground(String... params) {\r\n            publishProgress(\"\u6b63\u5728\u4f11\u7720...\"); \/\/ \u8c03\u7528onProgressUpdate()\r\n            try {\r\n                int time = Integer.parseInt(params[0])*1000;\r\n\r\n                Thread.sleep(time);\r\n                resp = \"\u4f11\u7720\u4e86 \" + params[0] + \" \u79d2\";\r\n            } catch (InterruptedException e) {\r\n                e.printStackTrace();\r\n                resp = e.getMessage();\r\n            } catch (Exception e) {\r\n                e.printStackTrace();\r\n                resp = e.getMessage();\r\n            }\r\n            return resp;\r\n        }\r\n\r\n\r\n        @Override\r\n        protected void onPostExecute(String result) {\r\n            \/\/ \u957f\u65f6\u95f4\u64cd\u4f5c\u7684\u7ed3\u679c\u6267\u884c\r\n            progressDialog.dismiss();\r\n            finalResult.setText(result);\r\n        }\r\n\r\n\r\n        @Override\r\n        protected void onPreExecute() {\r\n            progressDialog = ProgressDialog.show(MainActivity.this,\r\n                    \"\u8fdb\u5ea6\u5bf9\u8bdd\u6846\",\r\n                    \"\u8bf7\u7b49\u5f85 \"+time.getText().toString()+\" \u79d2\");\r\n        }\r\n\r\n\r\n        @Override\r\n        protected void onProgressUpdate(String... text) {\r\n            finalResult.setText(text[0]);\r\n            \r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u5728\u4ee5\u4e0a\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528AsyncTaskRunner\u7c7b\u6765\u6267\u884cAsyncTask\u64cd\u4f5c\u3002\u4ee5\u79d2\u4e3a\u5355\u4f4d\u7684\u65f6\u95f4\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\u7ed9\u8be5\u7c7b\uff0c\u5e76\u4e14\u5bf9\u4e8e\u7ed9\u5b9a\u7684\u65f6\u95f4\u91cf\u663e\u793a\u4e00\u4e2aProgressDialog\u3002\u4e0b\u9762\u7684\u56fe\u7247\u662f\u9879\u76ee\u751f\u6210\u7684\u8f93\u51fa\uff0c\u7528\u6237\u8bbe\u5b9a\u7684\u65f6\u95f4\u4e3a5\u79d2\u3002\u8fd9\u5c31\u7ed3\u675f\u4e86\u672c\u6559\u7a0b\u3002\u60a8\u53ef\u4ee5\u4ece\u4e0b\u9762\u7684\u94fe\u63a5\u4e0b\u8f7d\u6700\u7ec8\u7684Android AsyncTask\u9879\u76ee\u3002<\/p>\n<p>\u4e0b\u8f7dAndroid AsyncTask\u793a\u4f8b\u9879\u76ee<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aAndroid AsyncTask\u793a\u4f8b\u6559\u7a0b\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51711\u90e8\u5206\uff09\u3002 \u4eca\u5929\u6211\u4eec\u8981\u7814\u7a76Android  [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[900,904,1431,1360,1071],"class_list":{"0":"post-467","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-uncategorized","7":"tag-android","9":"tag-asynctask","10":"tag-1360","11":"tag-1071"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Android\u5f02\u6b65\u4efb\u52a1(AsyncTask)\u5b8c\u6574\u5f00\u53d1\u6559\u7a0b\uff1a\u4ece\u5165\u95e8\u5230\u7cbe\u901a\u7684\u5b9e\u4f8b\u8be6\u89e3 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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