Get text from ArrayList

Question

I've made an ExpandableListView with ArrayList as following:`

public void setChildGroupData() {

    /**
     * Add Data For TecthNology
     */
    ArrayList<String> child = new ArrayList<String>();
    child.add("Java");
    child.add("Drupal");
    child.add(".Net Framework");
    child.add("PHP");
    childItem.add(child);

    /**
     * Add Data For Mobile
     */
    child = new ArrayList<String>();
    child.add("Android");
    child.add("Window Mobile");
    child.add("iPHone");
    child.add("Blackberry");
    childItem.add(child);
    /**
     * Add Data For Manufacture
     */
    child = new ArrayList<String>();
    child.add("HTC");
    child.add("Apple");
    child.add("Samsung");
    child.add("Nokia");
    childItem.add(child);
    /**
     * Add Data For Extras
     */
    child = new ArrayList<String>();
    child.add("Contact Us");
    child.add("About Us");
    child.add("Location");
    child.add("Root Cause");
    childItem.add(child);


}

Now i want do do an action by triggering an if statement when some of the children is selected:

if(childItem.getText(childPosition) == "Java"){

        mDrawerLayout.closeDrawer(drawerList);

    }

However it is not working. I wonder if there's a way to get text from lets say child.add("Java"); so that if statement work and triggers an action?

Don't use `==` with strings, use `.equals`. See [here](http://stackoverflow.com/questions/513832/how-do-i-compare-strings-in-java) why. — Manuel Allenspach, Jun 10 '14 at 12:31

score 2 · Accepted Answer · edited May 23 '17 at 10:32

2

Use:

if("Java".equals(childItem.getText(childPosition)))

As == compares references while equals() compares values

Check this for more info

edited May 23 '17 at 10:32

Community

1
1

answered Jun 10 '14 at 12:31

BobTheBuilder

18,858
6
40
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score 2 · Answer 2 · edited May 23 '17 at 11:55

2

The string comparison string1 == string2 will check the reference not the value of each object

You should use string1.equals(string2), which would compare the values in each object.

In your case it is

if(childItem.getText(childPosition).equals("Java")){

    mDrawerLayout.closeDrawer(drawerList);

}

You can find some cool answers in this post.

Hope it helped solve your problem.

edited May 23 '17 at 11:55

Community

1
1

answered Jun 10 '14 at 12:35

Adheep

1,585
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it gives me error: "the method getText(int is undefined for the type ArrayList – Karol Wojtulewicz Jun 10 '14 at 13:34

Get text from ArrayList

2 Answers2