{"id":15173,"date":"2022-10-10T16:09:42","date_gmt":"2022-10-10T10:39:42","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-how-to-find-out-programatically-that-file-is-already-exist-or-not-closed\/"},"modified":"2022-10-10T16:09:42","modified_gmt":"2022-10-10T10:39:42","slug":"solved-how-to-find-out-programatically-that-file-is-already-exist-or-not-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-how-to-find-out-programatically-that-file-is-already-exist-or-not-closed\/","title":{"rendered":"[Solved] How to find out programatically that file is already exist or not? [closed]"},"content":{"rendered":"<p> [ad_1]<br \/>\n<\/p>\n<div id=\"answer-11326349\" class=\"answer js-answer accepted-answer js-accepted-answer\" data-answerid=\"11326349\" data-parentid=\"11326266\" data-score=\"1\" data-position-on-page=\"1\" data-highest-scored=\"1\" data-question-has-accepted-highest-score=\"1\" itemprop=\"acceptedAnswer\" itemscope itemtype=\"https:\/\/schema.org\/Answer\">\n<div class=\"post-layout\">\n<div class=\"votecell post-layout--left\"><\/div>\n<div class=\"answercell post-layout--right\">\n<div class=\"s-prose js-post-body\" itemprop=\"text\">\n<p>Creating SQLite Database &#8211; <\/p>\n<pre><code>public class DatabaseHelper extends SQLiteOpenHelper {\n\nstatic final String dbName=\"demoDB\";\nstatic final String employeeTable=\"Employees\";\nstatic final String colID=\"EmployeeID\";\nstatic final String colName=\"EmployeeName\";\nstatic final String colAge=\"Age\";\nstatic final String colDept=\"Dept\";\n\nstatic final String deptTable=\"Dept\";\nstatic final String colDeptID=\"DeptID\";\nstatic final String colDeptName=\"DeptName\";\n\nstatic final String viewEmps=\"ViewEmps\";\n<\/code><\/pre>\n<p>Creating the Database<\/p>\n<pre><code>public void onCreate(SQLiteDatabase db) \n{\n    \/\/ TODO Auto-generated method stub\n\n    db.execSQL(\"CREATE TABLE \"+deptTable+\" (\"+colDeptID+ \" INTEGER PRIMARY KEY , \"+\n    colDeptName+ \" TEXT)\");\n\n  db.execSQL(\"CREATE TABLE \"+employeeTable+\" \n    (\"+colID+\" INTEGER PRIMARY KEY AUTOINCREMENT, \"+\n        colName+\" TEXT, \"+colAge+\" Integer, \"+colDept+\" \n    INTEGER NOT NULL ,FOREIGN KEY (\"+colDept+\") REFERENCES \n    \"+deptTable+\" (\"+colDeptID+\"));\");\n\n\n  db.execSQL(\"CREATE TRIGGER fk_empdept_deptid \" +\n    \" BEFORE INSERT \"+\n    \" ON \"+employeeTable+\n\n    \" FOR EACH ROW BEGIN\"+\n    \" SELECT CASE WHEN ((SELECT \"+colDeptID+\" FROM \"+deptTable+\" \n    WHERE \"+colDeptID+\"=new.\"+colDept+\" ) IS NULL)\"+\n    \" THEN RAISE (ABORT,'Foreign Key Violation') END;\"+\n    \"  END;\");\n\n  db.execSQL(\"CREATE VIEW \"+viewEmps+\n    \" AS SELECT \"+employeeTable+\".\"+colID+\" AS _id,\"+\n    \" \"+employeeTable+\".\"+colName+\",\"+\n    \" \"+employeeTable+\".\"+colAge+\",\"+\n    \" \"+deptTable+\".\"+colDeptName+\"\"+\n    \" FROM \"+employeeTable+\" JOIN \"+deptTable+\n    \" ON \"+employeeTable+\".\"+colDept+\" =\"+deptTable+\".\"+colDeptID\n    );\n  \/\/Inserts pre-defined departments\n  InsertDepts(db);  \n }\n<\/code><\/pre>\n<p>Have a look at this <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/www.codeproject.com\/Articles\/119293\/Using-SQLite-Database-with-Android#\">Using-SQLite-Database-with-Android<\/a> blog. Hope this blog is enough for your queries.<\/p>\n<\/p><\/div>\n<div class=\"mt24\"><\/div>\n<\/div>\n<p>            <span class=\"d-none\" itemprop=\"commentCount\">3<\/span> <\/p><\/div>\n<\/div>\n<p>[ad_2]<\/p>\n<p>solved How to find out programatically that file is already exist or not? [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"<p>[ad_1] Creating SQLite Database &#8211; public class DatabaseHelper extends SQLiteOpenHelper { static final String dbName=&#8221;demoDB&#8221;; static final String employeeTable=&#8221;Employees&#8221;; static final String colID=&#8221;EmployeeID&#8221;; static final String colName=&#8221;EmployeeName&#8221;; static final String colAge=&#8221;Age&#8221;; static final String colDept=&#8221;Dept&#8221;; static final String deptTable=&#8221;Dept&#8221;; static final String colDeptID=&#8221;DeptID&#8221;; static final String colDeptName=&#8221;DeptName&#8221;; static final String viewEmps=&#8221;ViewEmps&#8221;; Creating the Database public &#8230; <a title=\"[Solved] How to find out programatically that file is already exist or not? [closed]\" class=\"read-more\" href=\"https:\/\/jassweb.com\/solved\/solved-how-to-find-out-programatically-that-file-is-already-exist-or-not-closed\/\" aria-label=\"More on [Solved] How to find out programatically that file is already exist or not? [closed]\">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":[452,493],"class_list":["post-15173","post","type-post","status-publish","format-standard","hentry","category-solved","tag-android","tag-file"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>[Solved] How to find out programatically that file is already exist or not? 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