Get all child views inside LinearLayout at once

Use getChildCount() and getChildAt(int index).

Example:

LinearLayout ll = …final int childCount = ll.getChildCount();for (int i = 0; i < childCount; i++) {      View v = ll.getChildAt(i);      // Do something with v.      // …}

((ViewGroup) findViewById(android.R.id.content));// you can use this in an Activity to get your layout root view, then pass it to findAllEdittexts() method below.

Here I am iterating only EdiTexts, if you want all Views you can replace EditText with View.

SparseArray<EditText> array = new SparseArray<EditText>();private void findAllEdittexts(ViewGroup viewGroup) {    int count = viewGroup.getChildCount();    for (int i = 0; i < count; i++) {        View view = viewGroup.getChildAt(i);        if (view instanceof ViewGroup)            findAllEdittexts((ViewGroup) view);        else if (view instanceof EditText) {            EditText edittext = (EditText) view;            array.put(editText.getId(), editText);        }    }}

use this

    final int childCount = mainL.getChildCount();    for (int i = 0; i < childCount; i++) {          View element = mainL.getChildAt(i);        // EditText        if (element instanceof EditText) {            EditText editText = (EditText)element;            System.out.println("ELEMENTS EditText getId=>"+editText.getId()+ " getTag=>"+element.getTag()+            " getText=>"+editText.getText());        }        // CheckBox        if (element instanceof CheckBox) {            CheckBox checkBox = (CheckBox)element;            System.out.println("ELEMENTS CheckBox getId=>"+checkBox.getId()+ " getTag=>"+checkBox.getTag()+            " getText=>"+checkBox.getText()+" isChecked=>"+checkBox.isChecked());        }        // DatePicker        if (element instanceof DatePicker) {            DatePicker datePicker = (DatePicker)element;            System.out.println("ELEMENTS DatePicker getId=>"+datePicker.getId()+ " getTag=>"+datePicker.getTag()+            " getDayOfMonth=>"+datePicker.getDayOfMonth());        }        // Spinner        if (element instanceof Spinner) {            Spinner spinner = (Spinner)element;            System.out.println("ELEMENTS Spinner getId=>"+spinner.getId()+ " getTag=>"+spinner.getTag()+            " getSelectedItemId=>"+spinner.getSelectedItemId()+            " getSelectedItemPosition=>"+spinner.getSelectedItemPosition()+            " getTag(key)=>"+spinner.getTag(spinner.getSelectedItemPosition()));        }    }