{"id":17236,"date":"2022-10-23T14:47:12","date_gmt":"2022-10-23T09:17:12","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-render-a-view-before-loading-data\/"},"modified":"2022-10-23T14:47:12","modified_gmt":"2022-10-23T09:17:12","slug":"solved-how-to-render-a-view-before-loading-data","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-render-a-view-before-loading-data\/","title":{"rendered":"[Solved] How to render a view before loading data"},"content":{"rendered":"

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While I would suggest Retrofit for cloud API operations, if you want to use an AsyncTask, then that’s fine. I would also suggest a ProgressBar \/ Dialog rather just updating some text. <\/p>\n

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the view will not render until the task is finished<\/p>\n<\/blockquote>\n

Unclear…<\/p>\n

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I found a solution online informs that I should render the view in the onPreExecute() and onPostExecute() method, so I tried the approach. Well, it does not work either<\/p>\n<\/blockquote>\n

Yes, that would work, so you should show what you tried<\/em>. <\/p>\n

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it seems that there is a constraint that forces the rendering work to be done only after all the AsyncTask has finished<\/p>\n<\/blockquote>\n

Yes, there is a limitation that you cannot update the UI outside of the UI thread. That is why onPreExecute and onPostExecute exist. <\/p>\n

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I can guarantee those methods work. <\/p>\n

\"enter<\/a><\/p>\n

public class ButtonActivity extends android.support.v7.app.AppCompatActivity implements View.OnClickListener {\n\n    private Button button;\n    private ProgressBar pg;\n\n    @Override\n    protected void onCreate(Bundle b) {\n        super.onCreate(b);\n        setContentView(...);\n\n        button = (Button) findViewById(...);\n        button.setOnClickListener(this);\n\n        pg = (ProgressBar) findViewById(...);\n        setLoading(false);\n    }\n\n    private void setLoading(boolean loading) {\n        button.setText(loading ? \"loading\" : \"get data\");\n        pg.setVisibility(loading ? View.VISIBLE : View.GONE);\n    }\n\n    @Override\n    public void onClick(View v) {\n        new BackgroundTask().execute();\n    }\n\n    private class BackgroundTask extends AsyncTask<Void, Void, Void> {\n\n        @Override\n        protected void onPreExecute() {\n            super.onPreExecute();\n            setLoading(true);\n        }\n\n        @Override\n        protected Void doInBackground(Void... params) {\n            try {\n                \/\/ some long operation\n                Thread.sleep(3000);\n            } catch (InterruptedException e) { }\n\n            return null;\n        }\n\n\n        @Override\n        public void onPostExecute(Void result) {\n            setLoading(false);\n        }\n    }\n}\n<\/code><\/pre>\n<\/p><\/div>\n
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            9<\/span> <\/p><\/div>\n<\/div>\n
[ad_2]<\/p>\n
solved How to render a view before loading data <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] While I would suggest Retrofit for cloud API operations, if you want to use an AsyncTask, then that’s fine. I would also suggest a ProgressBar \/ Dialog rather just updating some text. the view will not render until the task is finished Unclear… I found a solution online informs that I should render the … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[452,1859,4290],"class_list":["post-17236","post","type-post","status-publish","format-standard","hentry","category-solved","tag-android","tag-android-asynctask","tag-android-view"],"yoast_head":"\n[Solved] How to render a view before loading data - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-render-a-view-before-loading-data\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] How to render a view before loading data - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] While I would suggest Retrofit for cloud API operations, if you want to use an AsyncTask, then that’s fine. 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