java – How to disable/enable all children on LinearLayout in Android-ThrowExceptions

Exception or error:

Is there way by programming that all the children of a certain layout?

For example i have this layout with two children:

<LinearLayout android:layout_height="wrap_content"
        android:id="@+id/linearLayout1" android:layout_width="fill_parent">
        <SeekBar android:layout_height="wrap_content" android:id="@+id/seekBar1"
            android:layout_weight="1" android:layout_width="fill_parent"></SeekBar>
        <TextView android:id="@+id/textView2" android:text="TextView"
            android:layout_width="wrap_content" android:textAppearance="?android:attr/textAppearanceLarge"
            android:layout_height="wrap_content"></TextView>
    </LinearLayout>

and i want to do something like:

LinearLayout myLayout = (LinearLayout) findViewById(R.id.linearLayout1);
myLayout.setEnabled(false);

In order to disable the two textviews.

Any idea how?

How to solve:

A LinearLayout extends ViewGroup, so you can use the getChildCount() and getChildAt(index) methods to iterate through your LinearLayout children and do whatever you want with them. I’m not sure what you mean by enable/disable, but if you’re just trying to hide them, you can do setVisibility(View.GONE);

So, it would look something like this:

LinearLayout myLayout = (LinearLayout) findViewById(R.id.linearLayout1);
for ( int i = 0; i < myLayout.getChildCount();  i++ ){
    View view = myLayout.getChildAt(i);
    view.setVisibility(View.GONE); // Or whatever you want to do with the view.
}

###

You can also disable/enable without using setVisibility()

Add a View.OnClickListener to your CheckBox then pass the View you want to be disabled into the following function…

private void enableDisableView(View view, boolean enabled) {
    view.setEnabled(enabled);

    if ( view instanceof ViewGroup ) {
        ViewGroup group = (ViewGroup)view;

        for ( int idx = 0 ; idx < group.getChildCount() ; idx++ ) {
            enableDisableView(group.getChildAt(idx), enabled);
        }
    }
}

with the following reference Is there a way to disable all the items in a specific layout programmaticaly?

###

Why not just doing the setVisibility(View.GONE) on the layout itself, rather than iterating through the children?

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Maybe is late, but you can just add android:duplicateParentState="true" in the child of the LinearLayout

Something like this:

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

     <TextView
         android:id="@+id/textA"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:duplicateParentState="true"
         android:text="First Text"/>

     <TextView
         android:id="@+id/textB"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:duplicateParentState="true"
         android:text="Second Text"/>

 </LinearLayout>

###

Just add another transparent layout that will match_parent of the original view and change it visibility to visible when you want to disable all the children and to enable children then just change visibility to gone

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