1. Updated gradle version.

2. Added new method in db helper for checking if column exists or not.

Author: amitjangid80

.idea/caches/build_file_checksums.ser

@@ -10,7 +10,6 @@ group = 'com.github.amitjangid80'
 
 android {
     compileSdkVersion 28
-    buildToolsVersion "28.0.3"
 
     defaultConfig {
         minSdkVersion 19
@@ -49,11 +48,11 @@ dependencies {
     implementation "com.android.support:appcompat-v7:$supportLibraryVersion"
     implementation 'com.android.support.constraint:constraint-layout:1.1.3'
 
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.1.1'
-    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.0.0'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.2'
+    implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.3.2'
 
     // RxJava dependencies
-    implementation 'io.reactivex.rxjava2:rxandroid:2.1.0'
+    implementation 'io.reactivex.rxjava2:rxandroid:2.1.1'
 
     // kotlin dependencies
     implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlinVersion"

app/build.gradle

@@ -797,6 +797,56 @@ public boolean isTableExists(String tableName)
         }
     }
 
+    /**
+     * 2019 November 19 - Tuesday - 12:49 PM
+     * check if column exists method
+     *
+     * this method will check if a column in a table exists or not
+     *
+     * @param tableName - table name to check for column name
+     *
+     * @param columnName - column name to check if exists or not
+     *
+     * @return returns true if column exists in table or false if not
+    **/
+    private boolean checkIsColumnExists(String tableName, String columnName)
+    {
+        try
+        {
+            boolean isExists = false;
+
+            String query = "PRAGMA TABLE_INFO('" + tableName + "')";
+            Cursor cursor = db.getWritableDatabase().rawQuery(query, null);
+
+            if (cursor != null && cursor.moveToFirst())
+            {
+                for (int i = 0; i < cursor.getCount(); i++)
+                {
+                    String currentColumnName = cursor.getString(cursor.getColumnIndex("name"));
+
+                    if (currentColumnName.equalsIgnoreCase(columnName))
+                    {
+                        isExists = true;
+                        Log.e(TAG, "checkIsColumnExists: " + columnName + " found in table " + tableName);
+                    }
+
+                    cursor.moveToNext();
+                }
+
+                cursor.close();
+            }
+
+            return isExists;
+        }
+        catch (Exception e)
+        {
+            Log.e(TAG, "checkIsColumnExists: exception while checking if column exists or not\n");
+            e.printStackTrace();
+
+            return false;
+        }
+    }
+
     //#region COMMENTS FOR getMaxId method
     /**
      * 2018 August 13 - Monday - 12:34 PM

app/src/main/java/com/amit/db/DBHelper.java

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-    ext.kotlinVersion = '1.3.41'
+    ext.kotlinVersion = '1.3.60'
     ext.supportLibraryVersion = '28.0.0'
 
     repositories {
@@ -10,7 +10,7 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.4.2'
+        classpath 'com.android.tools.build:gradle:3.5.2'
         classpath 'com.github.dcendents:android-maven-gradle-plugin:2.1'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
 

build.gradle

@@ -1,6 +1,6 @@
-#Wed Jun 12 16:30:54 IST 2019
+#Wed Oct 16 12:44:32 IST 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.1.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip