Dynamic list of checkboxes with onclick functions

Question

I have a page that returns a list of items backs from a database. I want to add each item to my android fragment as a checkbox dynamically with an onClick, that can tell if an item is being checked or un-checked.

How can I add checkboxes dynamically with on-clicks and different titles for each?

Below is the xml I am inserting the checkboxes into:

<?xml version="1.0" encoding="utf-8"?>

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:background="#e5e5e5"

    android:layout_height="match_parent" >

    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >




        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="6dp"
                android:layout_marginRight="6dp"
                android:layout_marginTop="4dp"
                android:layout_marginBottom="4dp"
                android:orientation="vertical"
                android:background="@drawable/bg_card">

                <!-- Card Contents go here -->


                <TextView
                    android:id="@+id/styleDescription"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:ems="10"
                    android:textSize="15sp"
                    android:padding="5dip"

                    ></TextView>

                <CheckBox
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="New CheckBox"
                    android:id="@+id/checkBox" />


            </LinearLayout >

        </FrameLayout>

        <FrameLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="6dp"
                android:layout_marginRight="6dp"
                android:layout_marginTop="4dp"
                android:layout_marginBottom="4dp"
                android:orientation="horizontal"
                android:background="@drawable/bg_card">

                <!-- Card Contents go here -->

                <Button
                    android:id="@+id/buttonAddList"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:text="Create List"

                    style="?android:attr/borderlessButtonStyle"
                    android:textColor="@color/orange"
                    android:textStyle="bold"
                    />




            </LinearLayout >

        </FrameLayout>







    </LinearLayout>

</ScrollView>

I currently have one checkbox in the above code. I plan on removing this. That checkbox is just to show where I want my check boxes to show up.

Answer 1

What you need to do first is add an id to your LinearLayout (in that XML file), the one which is going to hold the CheckBoxes. Then, in the code you need to get that LinearLayout by its id and use addView() to add CheckBoxes that you create dynamically. I imagine in pseudocode it'd look like this:

for (int i = 0; i < numberOfCheckBoxes; i++) {

    CheckBox checkBox = new CheckBox();
    checkBox.setTitle("Your title");
    checkBox.setOnClickListener(new OnClickListener() {

        // Your code to be executed on click
    });

    linearLayout.addView(checkBox);
}

Does this help?

PS: It'd be nice if you kept your code clean - ADT (and I believe Eclipse too) gives you the Shift+Ctrl+F shortcut to indent your code automatically - use it as often as possible ;)