How to get the total number of Views in a lyout including subviews

Question

I am trying to count all the views in any layout being displayed to the user. To achieve it, the code posted below was used, but as you see in the layout, it contains

    Button
    LinearLayout
        Button
        Button
    TextView
    LinearLayout

when the code is executed, it says that the layout has only 4 widgets "Button, LinearLayout, TextView, LinearLayout", while I expected the code to return 6 widgets. would you please tell me how to get the total widgets contains in a layout including the sub-widgets/views?

code:

public class ActMain extends AppCompatActivity {

private static final String TAG = ActMain.class.getSimpleName();
private LinearLayout mMainContainer = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.act_main);

    this.mMainContainer = (LinearLayout) findViewById(R.id.actMain_mainContainer);
    int totalWidgets = this.mMainContainer.getChildCount();
    Log.d(TAG, "totalWidgets:" + totalWidgets);


    for (int i = 0; i < this.mMainContainer.getChildCount(); i++) {
        View view = mMainContainer.getChildAt(i);
    }
}

}

layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/actMain_mainContainer"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.example.alten.test_traversethroughaview_1.ActMain">

    <Button
        android:id="@+id/actMain_btn_change"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/decision_change" />

        <LinearLayout
            android:id="@+id/actMain_linlay_1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
            <Button
                android:id="@+id/actMain_btn_yes"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/decision_yes" />
            <Button
                android:id="@+id/actMain_btn_no"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/decision_no" />
        </LinearLayout>

        <TextView
            android:id="@+id/actMain_tv_display"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <LinearLayout
            android:id="@+id/actMain_linlay_2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal">
        </LinearLayout>

Answer 1

use this method:

public int getChildrenViews(ViewGroup parent){
    int count = parent.getChildCount();
    for (int i=0;i<parent.getChildCount();i++){
        if (parent.getChildAt(i) instanceof ViewGroup){
            count+=getChildrenViews((ViewGroup) parent.getChildAt(i));
        }
    }
    return count;
}

anywhere you want add this part:

if (getWindow().getDecorView().getRootView() instanceof ViewGroup){
        getChildrenViews((ViewGroup) getWindow().getDecorView().getRootView());
    }