4/27/2024 0 Comments Refresh sqlite database android![]() ![]() Lets go inside this update, so hover over control and click and see it takes the fourth argument as the string array right. So we will you know ask whatever id is passed using this id parameter we are going to query this and fourth is the value on the basis of which we want to update our data so this is the column name on the basis of which we want to update the data and our column name is id so you can just write here column name, id is equal to and then in here, fourth argument. ![]() So what we want to do, we want to update data on the basis of for example id because id is our unique primary key here and on the basis of primary key we can differentiate data. The third argument is the condition which we want to pass here. So it takes the second argument as a content value so we take this instance of content value and pass it here. we have declared table name here right so first argument is the table name right. The first argument it takes is the name of your table okay. And this update will update whatever argument you pass here. Step 6) So just take your database instance now and then call update here. The only difference in update data functions and insert data function is, the method we are going to use now. So let's do it and one more column we need to add here and this will be for column 1 and its id in our case right. Step 5) And then as we have done in this insert data function that we’re putting whatever data is passed from the argument to this content value using put. First of all, we will create SQLite database instance and then we are going to create an instance of content value. Step 4) Now in here what we’re going to do is, as we have done inserting data function. Because our table will contain four columns, id, name, surname and marks right. The First argument we are going to pass here will be string id, second is string name, third is string surname and fourth is string marks.īasically, we want to pass all the four column data to it. So it will be public and it'll return boolean and It's going to take four arguments. Now we will create one more function here and we will call it as updateData. ![]() javafile and in here till now we have created insert data and get all data function right. javaclass which we have created in the last tutorial so go to the database helper. Step 3) Now we need to create a function in our database helper. And to update the data we need a unique reference of the row so that we can tell SQLite that we want to delete the data from this row.īecause names can be same so if you want to change the name of one partner which shares the name with the other person then the data can be changed for both the names if you don't know what is the unique you know row or unique column in this, So id we have defined as a unique column for this database table. First one was id, the second one was name, surname and the marks scored by the students. Step 2) And one more thing we want to do is, if you remember our database table contains four columns. Step 1) First add one more button and this button we are going to use to update the data, so I'm going to change the name of the button as an update. Please follow the below steps in order to update data in SQLite database using our Android app:
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