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android – Snackbar with CoordinatorLayout disable dismiss

Posted by: admin June 15, 2020 Leave a comment

Questions:

I am using the support

  • FloatingActionButton
  • Snackbar
  • CoordinatorLayout

I need the CoordinatorLayout so that if SnackBar is shown the FloatingActionButton moves up to make room for the Snackbar. For better understanding check this video.

I am using SnackBar for double-back to exit the application, but the SnackBar can be dismissed.

Is there a way to disable the dismiss on the SnackBar?

Snackbar snackbar = Snackbar.make(view, R.string.press_back_again_to_exit, Snackbar.LENGTH_SHORT);
snackbar.setAction(R.string.ok, new View.OnClickListener() {
    @Override
    public void onClick(View v)
    {

    }
});
snackbar.setActionTextColor(getResources().getColor(R.color.white));

View view = snackbar.getView();
view.setBackgroundColor(getResources().getColor(R.color.orange_warning));

snackbar.show();

Layout

<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v4.widget.DrawerLayout
        android:id="@+id/drawer_layout"
        xmlns:sothree="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/white"
        android:fitsSystemWindows="true">

        <com.sothree.slidinguppanel.SlidingUpPanelLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="bottom"
            sothree:umanoFadeColor="@android:color/transparent"
            sothree:umanoPanelHeight="100dp"
            sothree:umanoShadowHeight="4dp">

            <!-- Toolbar and main content -->
            <LinearLayout
                android:id="@+id/toolbar_and_content"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <include layout="@layout/toolbar"/>

                <!-- Your content layout -->
                <FrameLayout
                    android:id="@+id/content_frame"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="vertical"/>

            </LinearLayout>

            <!-- Sliding up panel layout -->
            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:background="@color/darker_grey"
                android:orientation="vertical">

                ...

            </LinearLayout>

        </com.sothree.slidinguppanel.SlidingUpPanelLayout>


        <!-- Navigation drawer -->
        <ExpandableListView
            android:id="@+id/lv_left_drawer"
            android:layout_width="280dp"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:background="@color/white"
            android:childDivider="@android:color/transparent"
            android:clickable="true"
            android:divider="@color/divider_color"
            android:dividerHeight="0.6dp"
            android:fadeScrollbars="true"
            android:groupIndicator="@null"
            android:listSelector="@drawable/button_drawer_child_selector"
            android:scrollbarSize="0dp"/>

    </android.support.v4.widget.DrawerLayout>

    <android.support.design.widget.FloatingActionButton
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="right|bottom"
        android:layout_marginBottom="@dimen/floating_action_button_margin"
        android:layout_marginRight="@dimen/floating_action_button_margin"
        android:src="@drawable/ic_add"
        android:visibility="invisible"
        app:backgroundTint="@color/orange"
        app:borderWidth="0dp"
        app:elevation="6dp"
        app:fabSize="normal"/>

</android.support.design.widget.CoordinatorLayout>

P.S.

I am aware of this GitHub library, that has this functionality, but is there a ‘native’ way to do it?

How to&Answers:

You can alter the duration of Snackbar to be shown. It will be similar to disable dismiss.

int     LENGTH_INDEFINITE   Show the Snackbar indefinitely. 

Check docs.

if it does not work
For this then there is only one way, Implement Your custom Snackbar and override dismiss() method and in that do nothing. 🙂 As dismiss() is a public API.

Answer:

The answer about just using LENGTH_INDEFINITE is not sufficient.

It is only non-dismissable when the Snackbar is no child of CoordinatorLayout.
When it is a child, you can still swipe away the SnackBar.

What you can do in that case is listen for the dismiss swipe and simply re-show the Snackbar.

public void showAnnoyingSnackBar(View root, String text) {
    Snackbar.make(root, text, Snackbar.LENGTH_INDEFINITE)
        .setCallback(new Snackbar.Callback() {
            @Override public void onDismissed(Snackbar snackbar, int event) {
                // recursively call this method again when the snackbar was dismissed through a swipe
                if (event == DISMISS_EVENT_SWIPE) showAnnoyingSnackBar(root, text);
            }
        })
        .show();
}

Answer:

Snackbar now has actual support disabling swipe to dismiss using the setBehavior method. The great thing here is that before you would always lose some behaviors which are now preserved. You’ll also want to use Snackbar.LENGTH_INDEFINITE

Note that the package moved so you have to import the “new” Snackbar in the snackbar package.

Snackbar.make(view, stringId, Snackbar.LENGTH_INDEFINITE)
    .setBehavior(new NoSwipeBehavior())
    .show();

class NoSwipeBehavior extends BaseTransientBottomBar.Behavior {

    @Override
    public boolean canSwipeDismissView(View child) {
      return false;
    }
}

Answer:

I noticed that when show() method is called, SnackbarLayout is not fully initialised yet.

To lock dissmiss we have to clear behavior after SnackbarLayout initialisation.
the best place to do this is for example in OnPreDrawListener of SnackbarLayout

final Snackbar snack = Snackbar.make(getView(), "I can't be dissmiss", Snackbar.LENGTH_INDEFINITE);
    snack.show();
    snack.getView().getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
        @Override
        public boolean onPreDraw() {
            snack.getView().getViewTreeObserver().removeOnPreDrawListener(this);
                ((CoordinatorLayout.LayoutParams) snack.getView().getLayoutParams()).setBehavior(null);
                return true;
            }
        });

Answer:

I was successful in disabling the swipe-sideways-to-dismiss snackbars with the following hack (after calling snackbar.show())

((android.support.design.widget.CoordinatorLayout.LayoutParams) snackbar.getView().getLayoutParams()).setBehavior(null);