Question

I have looked at other questions regarding this problem but the solutions don’t work for me. I have a number of edittext fields on a page and want to be able to reset them with one button press. I implemented the solution from this thread but I have nested linear layouts and it only clears the edittext that is a direct child of the main container. How can I get it to find all of the edittext fields or will I have to reference each one?

My xml file structure is as follows:

<ScrollView>
    <LinearLayout android:id="@+id/MainParent">
        <LinearLayout>
            TextView
            EditText
        </LinearLayout>
        <LinearLayout>
            TextView
            EditText
        </LinearLayout>
        <LinearLayout>
            TextView
            EditText
        </LinearLayout>
        EditText
        <LinearLayout>
            Button1
            Button2
        </LinearLayout>
    </LinearLayout>
</ScrollView>

Snippet from Java File:

ViewGroup group = (ViewGroup)findViewById(R.id.MainParent);
       for (int i = 0, count = group.getChildCount(); i < count; ++i) {
           View view = group.getChildAt(i);
               if (view instanceof EditText) {
                   ((EditText)view).setText("");
       }

Answer 1

If you are not interested in referencing each EditText specifically, I’d make a recursive function to handle the hierarchy.

public void clearAll(ViewGroup root) {
    for (int i = 0, j = root.getChildCount(); i < j, i++) {
        View view = root.getChildAt(i);
        if (view instanceof ViewGroup) {
            clearAll((ViewGroup) view);
            continue;
        }
        if (view instanceof EditText) {
            ((EditText) view).setText("");
            continue;
        }
    }
}

Then you just call:

clearAll((ViewGroup) findViewById(R.id.MainParent));