I want to change the action text color for my snackbar, but it is not working for some reason.
I use the following code to display a snackbar:
Snackbar.make(findViewById(R.id.root), "text", Snackbar.LENGTH_LONG).setActionTextColor(R.color.yellow).setAction("OK", new View.OnClickListener() {
#Override
public void onClick(View view) {
}
}).show();
The argument of setActionTextColor is the int that represents the color, not the resource ID.
Instead of this:
.setActionTextColor(R.color.yellow)
try:
.setActionTextColor(Color.YELLOW)
If you want to use resources anyway, try:
.setActionTextColor(ContextCompat.getColor(context, R.color.color_name));
Note: To use ContextCompat, I assume you have included Support library to your build.gradle file (It is optional if you have already appcompat (v7) library too).
Use
.setActionTextColor(getResources().getColor(R.color.red))
instead of just
.setActionTextColor(R.color.red)
None of above answers helped me.
I found this solution, and it works by changing manually the TextView's text color
Snackbar snack = Snackbar.make(v, "Snackbar message", Snackbar.LENGTH_LONG);
View view = snack.getView();
TextView tv = (TextView) view.findViewById(android.support.design.R.id.snackbar_text);
tv.setTextColor(Color.WHITE);
snack.show();
If you want to change action button text color..
snackbar.setActionTextColor(getResources().getColor(R.color.colorAccent));
If you want to change action button background color..
View sbView = snackbar.getView();
Button button=
(Button) sbView.findViewById(com.google.android.material.R.id.snackbar_action);
button.setBackgroundColor(getResources().getColor(R.color.white));
Try this,
Snackbar snackbar = Snackbar.make(findViewById(android.R.id.content), "Permission required!", 3000 /*Snackbar.LENGTH_INDEFINITE*/);
snackbar.setAction("OK", new View.OnClickListener() {
#Override
public void onClick(View v) {
// perform any action when the button on the snackbar is clicked
Toast.makeText(MainActivity.this, "Permission granted.", Toast.LENGTH_SHORT).show();
}
});
snackbar.setBackgroundTint(getResources().getColor(R.color.black)); // set the background tint color for the snackbar
snackbar.setActionTextColor(getResources().getColor(R.color.purple_500)); // set the action button text color
snackbar.show();
So I've started using the new Snackbar in the Design Support Library, but I found that when you define "android:textColor" in your theme, it applies to the text color of the snackbar. This is obviously a problem if your primary text color is dark.
Does anyone know a way around this or have advice for how I should color my text?
EDIT January 2017: (Post-Answer)
While there are some custom solutions to fix the problem below, it's probably good to provide the correct way to theme Snackbars.
Firstly, you probably shouldn't be defining android:textColor in your themes at all (unless you really know the scope of what is using the theme). This sets the text color of basically every view that connects to your theme. If you want to define text colors in your views that are not default, then use android:primaryTextColor and reference that attribute in your custom views.
However, for applying themes to Snackbar, please reference this quality guide from a third party material doc: http://www.materialdoc.com/snackbar/ (Follow the programmatic theme implementation to have it not rely on an xml style)
For reference:
// create instance
Snackbar snackbar = Snackbar.make(view, text, duration);
// set action button color
snackbar.setActionTextColor(getResources().getColor(R.color.indigo));
// get snackbar view
View snackbarView = snackbar.getView();
// change snackbar text color
int snackbarTextId = android.support.design.R.id.snackbar_text;
TextView textView = (TextView)snackbarView.findViewById(snackbarTextId);
textView.setTextColor(getResources().getColor(R.color.indigo));
// change snackbar background
snackbarView.setBackgroundColor(Color.MAGENTA);
(You can also create your own custom Snackbar layouts too, see the above link. Do so if this method feels too hacky and you want a surely reliable way to have your custom Snackbar last through possible support library updates).
And alternatively, see answers below for similar and perhaps faster answers to solve your problem.
I found this at What are the new features of Android Design Support Library and how to use its Snackbar?
This worked for me for changing the text color in a Snackbar.
Snackbar snack = Snackbar.make(view, R.string.message, Snackbar.LENGTH_LONG);
View view = snack.getView();
TextView tv = (TextView) view.findViewById(android.support.design.R.id.snackbar_text);
tv.setTextColor(Color.WHITE);
snack.show();
UPDATE: ANDROIDX:
As dblackker points out in the comments, with the new AndroidX support library, code to find the ID of Snackbar TextView changes to:
TextView tv = view.findViewById(com.google.android.material.R.id.snackbar_text);
tv.setTextColor(ContextCompat.getColor(requireContext(), R.color.someColor))
I know this has been answered already but the easiest way I found was directly in the make using the Html.fromHtml method and a font tag
Snackbar.make(view,
Html.fromHtml("<font color=\"#ffffff\">Tap to open</font>").show()
Created this kotlin extention function i use in my projects:
fun Snackbar.setTextColor(color: Int): Snackbar {
val tv = view.findViewById(com.google.android.material.R.id.snackbar_text) as TextView
tv.setTextColor(color)
return this
}
Usage like you would expect:
Snackbar.make(view,
R.string.your_string,Snackbar.LENGTH_LONG).setTextColor(Color.WHITE).show()
Alright so I fixed it by basically reorganizing the way I do text colors.
In my light theme, I set android:textColorPrimary to the normal dark text I wanted, and I set android:textColor to white.
I updated all of my text views and buttons to have android:textColor="?android:attr/textColorPrimary".
So because snackbar draws from textColor, I just set all of my other text to textColorPrimary.
EDIT JANUARY 2017: ----------------------------------------------------
So as the comments say, and as stated in the edited original question above, you should probably not define android:textColor in your themes, as this changes the text color of every view inside the theme.
Hacking on android.support.design.R.id.snackbar_text is fragile, a better or less hacky way to do that will be:
String snackText = getResources().getString(YOUR_RESOURCE_ID);
SpannableStringBuilder ssb = new SpannableStringBuilder()
.append(snackText);
ssb.setSpan(
new ForegroundColorSpan(Color.WHITE),
0,
snackText.length(),
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
Snackbar.make(
getView(),
ssb,
Snackbar.LENGTH_SHORT)
.show();
One approach is to use spans:
final ForegroundColorSpan whiteSpan = new ForegroundColorSpan(ContextCompat.getColor(this, android.R.color.white));
SpannableStringBuilder snackbarText = new SpannableStringBuilder("Hello, I'm white!");
snackbarText.setSpan(whiteSpan, 0, snackbarText.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
Snackbar.make(view, snackbarText, Snackbar.LENGTH_LONG)
.show();
With spans you can also add several colors and styles inside one Snackbar. Here's a nice guide:
https://androidbycode.wordpress.com/2015/06/06/material-design-snackbar-using-the-design-support-library/
If you migrated to androidX use com.google.android.material.R.id.snackbar_text instead of
android.support.design.R.id.snackbar_text for changing color of text on snackbar.
Currently (January 2020) with
com.google.android.material:material:1.2.0 and probably also 1.1.0
Is definitely the best way how to do it by overrides these styles:
<item name="snackbarStyle">#style/Widget.MaterialComponents.Snackbar</item>
<item name="snackbarButtonStyle">#style/Widget.MaterialComponents.Button.TextButton.Snackbar</item>
<item name="snackbarTextViewStyle">#style/Widget.MaterialComponents.Snackbar.TextView</item>
If you use a material theme with .Bridge at the end, for some reason, neither of these styles are defined. So Snackar will use some legacy layout without these styles.
I found in the source code that both snackbarButtonStyle and snackbarTextViewStyle must be defined otherwise it will be not used.
If you will migrate your code to AndroidX, the TextView property is now:
com.google.android.material.R.id.snackbar_text
The only way I see is using getView() and cycling through its child. I don't know if it's going to work, and it is bad as it looks. I hope they'll add some API about this issue soon.
Snackbar snack = Snackbar.make(...);
ViewGroup group = (ViewGroup) snack.getView();
for (int i = 0; i < group.getChildCount(); i++) {
View v = group.getChildAt(i);
if (v instanceof TextView) {
TextView t = (TextView) v;
t.setTextColor(...)
}
}
snack.show();
Use the Snackbar included in the Material Components Library and apply the
setTextColor to define the text color
setActionTextColor to define the text color used by the action. You can use a color or a color selector
setBackgroundTint to define the background color of the Snackbar
Something like:
Snackbar snackbar = Snackbar.make(view, "My custom Snackbar", Snackbar.LENGTH_LONG);
snackbar.setTextColor(ContextCompat.getColor(this,R.color.xxxxx));
snackbar.setActionTextColor(ContextCompat.getColor(this,R.color.my_selector));
snackbar.setBackgroundTint(ContextCompat.getColor(this,R.color.xxxx));
snackbar.show();
With Jetpack Compose you can customize the SnackbarHost defining a custom Snackbar
snackbarHost = {
// reuse default SnackbarHost to have default animation and timing handling
SnackbarHost(it) { data ->
Snackbar(
snackbarData = data,
contentColor = Yellow,
actionColor = Red.copy(alpha = 0.9f)
)
}
}
Then just use it:
scope.launch {
scaffoldState.snackbarHostState.showSnackbar(
message = "Snackbar text # ${++clickCount}",
actionLabel = "Done")
}
You can use this library: https://github.com/SandroMachado/restaurant
new Restaurant(MainActivity.this, "Snackbar with custom text color", Snackbar.LENGTH_LONG)
.setTextColor(Color.GREEN)
.show();
Disclaimer: I made the library.
This is what I use when I need custom colors
#NonNull
public static Snackbar makeSnackbar(#NonNull View layout, #NonNull CharSequence text, int duration, int backgroundColor, int textColor/*, int actionTextColor*/){
Snackbar snackBarView = Snackbar.make(layout, text, duration);
snackBarView.getView().setBackgroundColor(backgroundColor);
//snackBarView.setActionTextColor(actionTextColor);
TextView tv = (TextView) snackBarView.getView().findViewById(android.support.design.R.id.snackbar_text);
tv.setTextColor(textColor);
return snackBarView;
}
And consumed as:
CustomView.makeSnackbar(view, "Hello", Snackbar.LENGTH_LONG, Color.YELLOW,Color.CYAN).setAction("DO IT", myAction).show();
I changed my theme
Theme.AppCompat.Light.NoActionBar
to
Theme.AppCompat.NoActionBar
It worked.Try to use simple theme instead of light or other theme.
If you decide to use the dirty and hacky solution with finding TextView in Snackbar by id and you already migrated to androidx, then here's the code:
val textViewId = com.google.android.material.R.id.snackbar_text
val snackbar = Snackbar.make(view, "Text", Snackbar.LENGTH_SHORT)
val textView = snackbar.view.findViewById(textViewId) as TextView
textView.setTextColor(Color.WHITE)
Find by id did't work for me so I found another solution:
Snackbar snackbar = Snackbar.make(view, text, duration);//just ordinary creation
ViewGroup snackbarView = (ViewGroup) snackbar.getView();
SnackbarContentLayout contentLayout = (SnackbarContentLayout) snackbarView.getChildAt(0);
TextView tvText = contentLayout.getMessageView();
tvText.setTextColor(/*your color here*/);
//set another colors, show, etc
I have a simple code that will help to get an instance of both the textview of Snackbar, after that you can call all methods that are applicable on a textview.
Snackbar snackbar = Snackbar.make( ... ) // Create Snack bar
snackbar.setActionTextColor(getResources().getColor(R.color.white)); //if you directly want to apply the color to Action Text
TextView snackbarActionTextView = (TextView) snackbar.getView().findViewById( android.support.design.R.id.snackbar_action );
snackbarActionTextView.setTextColor(Color.RED); //This is another way of doing it
snackbarActionTextView.setTypeface(snackbarActionTextView.getTypeface(), Typeface.BOLD);
//Below Code is to modify the Text in Snack bar
TextView snackbarTextView = (TextView) snackbar.getView().findViewById(android.support.design.R.id.snackbar_text);
snackbarTextView.setTextSize( 16 );
snackbarTextView.setTextColor(getResources().getColor(R.color.white));
Just to save your precious development time, here is the static method I am using:
public static void snack(View view, String message) {
if (!TextUtils.isEmpty(message)) {
Snackbar snackbar = Snackbar.make(view, message, Snackbar.LENGTH_SHORT);
snackbar.getView().setBackgroundColor(Color.YELLOW);
TextView tv = snackbar.getView().findViewById(android.support.design.R.id.snackbar_text); //snackbar_text
tv.setTextColor(Color.BLACK);
snackbar.show();
}
}
This is how it looks:
If you are in Kotlin, you can create an extension :
fun Snackbar.withTextColor(color: Int): Snackbar {
val tv = this.view.findViewById(android.support.design.R.id.snackbar_text) as TextView
tv.setTextColor(color)
return this
}
Usage :
yourSnackBar.withTextColor(Color.WHITE).show()
As per new AndroidX Jitpack components
implementation 'com.google.android.material:material:1.0.0'
Use this extension which i had created
inline fun View.snack(message: String, length: Int = Snackbar.LENGTH_LONG,
f: Snackbar.() -> Unit) {
val snack = Snackbar.make(this, message, length)
snack.f()
snack.show()
}
fun Snackbar.action(action: String, actionColor: Int? = null, textColor: Int? = null, listener: (View) -> Unit) {
setAction(action, listener)
actionColor?.let {
setActionTextColor(it)
}
textColor?.let {
this.view.findViewById<TextView>(R.id.snackbar_text).setTextColor(it)
}
}
Use it like this
btn_login.snack(
getString(R.string.fields_empty_login),
ContextCompat.getColor(this#LoginActivity, R.color.whiteColor)
) {
action(getString(R.string.text_ok), ContextCompat.getColor(this#LoginActivity, R.color.gray_300),ContextCompat.getColor(this#LoginActivity, R.color.yellow_400)) {
this#snack.dismiss()
}
}
This is my workaround to solve this type of problem in androidx using kotlin
fun showSnackBar(message: String) {
mContent?.let {
val snackbar = Snackbar.make(it, message, Snackbar.LENGTH_LONG)
val snackbarView = snackbar.view
val tv = snackbarView.findViewById<TextView>(R.id.snackbar_text)
tv.setTextColor(Color.WHITE) //change the color of text
tv.maxLines = 3 //specify the limit of text line
snackbar.duration = BaseTransientBottomBar.LENGTH_SHORT //specify the duraction of text message
snackbar.show()
}
}
You need initialize mContent inside onViewCreated method like below
var mContent: View? = null
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
mContent = view
}
This worked for me
Snackbar.make(v, "Loading...", Snackbar.LENGTH_LONG).setTextColor(getColor(R.color.orange)).show();
Before that I declared my color in color.xml
<color name="orange">#FF9800</color>
You can try this code
Snackbar snackbar;
snackbar = Snackbar.make(binding.getRoot(), "Hello World!", Snackbar.LENGTH_INDEFINITE);
View snackBarView = snackbar.getView();
snackBarView.setBackgroundColor(getColor(R.color.purple_700));
snackbar.show();
snackbar.setTextColor(ContextCompat.getColor(this, R.color.white));
snackbar.setActionTextColor(ContextCompat.getColor(this, R.color.purple_200));
snackbar.setBackgroundTint(ContextCompat.getColor(this, R.color.purple_700));
snackbar.setAction("Ok", new View.OnClickListener() {
#Override
public void onClick(View view) {
Toast.makeText(MainActivity.this, "Click", Toast.LENGTH_SHORT).show();
}
});
snackbar.show();
I also noticed the same problem. Thanks to the answers here I've created a small class, which can help to solve this problem in more easily, just by replacing this:
Snackbar.make(view, "Error", Snackbar.LENGTH_LONG).show();
with this:
Snackbar2.make(view, "Error", Snackbar.LENGTH_LONG).show();
Here is my class:
public class Snackbar2 {
static public Snackbar make(View view, int resid, int duration){
Snackbar result = Snackbar.make(view, resid, duration);
process(result);
return result;
}
static public Snackbar make(View view, String text, int duration){
Snackbar result = Snackbar.make(view, text, duration);
process(result);
return result;
}
static private void process(Snackbar snackbar){
try {
View view1= snackbar.getView();
TextView tv = (TextView) view1.findViewById(android.support.design.R.id.snackbar_text);
tv.setTextColor(Color.WHITE);
}catch (Exception ex)
{
//inform about error
ex.printStackTrace();
}
}
}
I'm trying to leverage new Snackbar from Android Design Support Library to display multiline snackbar, as shown in http://www.google.com/design/spec/components/snackbars-toasts.html#snackbars-toasts-specs:
import android.support.design.widget.Snackbar;
final String snack = "First line\nSecond line\nThird line";
Snackbar.make(mView, snack, Snackbar.LENGTH_LONG).show();
It displays only First line... on my Nexus 7. How to make it display all lines?
PS: I tried Toast and it displayed all lines.
Just set the maxLines attribute of Snackbars Textview
View snackbarView = snackbar.getView();
TextView textView = (TextView) snackbarView.findViewById(android.support.design.R.id.snackbar_text);
textView.setMaxLines(5); // show multiple line
If you're using the more recent "com.google.android.material:material:1.0.0"dependency, then you will use this: com.google.android.material.R.id.snackbar_text to access the Snackbar's TextView.
You can use even R.id.snackbar_text as well. it's work for me.
One can override the predefined value used for that in values.xml of the app
<integer name="design_snackbar_text_max_lines">5</integer>
This value is used by Snackbar by default.
With the Material Components Library you can define it using with the snackbarTextViewStyle attribute in the app theme:
<style name="AppTheme" parent="Theme.MaterialComponents.*">
...
<item name="snackbarTextViewStyle">#style/snackbar_text</item>
</style>
<style name="snackbar_text" parent="#style/Widget.MaterialComponents.Snackbar.TextView">
...
<item name="android:maxLines">5</item>
</style>
Note: it requires the version 1.2.0 of the library.
Snackbar snackbar = Snackbar.make(view, "Text",Snackbar.LENGTH_LONG).setDuration(Snackbar.LENGTH_LONG);
View snackbarView = snackbar.getView();
TextView tv= (TextView) snackbarView.findViewById(android.support.design.R.id.snackbar_text);
tv.setMaxLines(3);
snackbar.show();
Here is my finding on this :
Android does support multiline snackbars but it has a max limit of 2 lines which matches the design guideline where it says that the height of multiline snack bar should be 80dp (almost 2 lines)
To verify this, i used the cheesesquare android sample project. If i use following string:
Snackbar.make(view, "Random Text \n When a second snackbar is triggered while the first is displayed", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
In this case, i can see the multiline snack bar with the text of 2nd line, i.e. "When a second snackbar is triggered" but if i change this code to following implementation:
Snackbar.make(view, "Random Text \n When \n a second snackbar is triggered while the first is displayed", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
I can only see the "Random Text\nWhen ...". This means that design library is intentionally forcing the textview to be of max 2 lines.
In kotlin you can use extensions.
// SnackbarExtensions.kt
fun Snackbar.allowInfiniteLines(): Snackbar {
return apply { (view.findViewById<View?>(R.id.snackbar_text) as? TextView?)?.isSingleLine = false }
}
Usage:
Snackbar.make(view, message, Snackbar.LENGTH_LONG)
.allowInfiniteLines()
.show()
For Material Design, the reference is com.google.android.material.R.id.snackbar_text
val snack = Snackbar.make(myView, R.string.myLongText, Snackbar.LENGTH_INDEFINITE).apply {
view.findViewById<TextView>(com.google.android.material.R.id.snackbar_text).maxLines = 10
}
snack.show()
In Kotlin, you can just do
Snackbar.make(root_view, "Yo\nYo\nYo!", Snackbar.LENGTH_SHORT).apply {
view.snackbar_text.setSingleLine(false)
show()
}
You could also replace setSingleLine(false) with maxLines = 3.
Android Studio should prompt you to add
import kotlinx.android.synthetic.main.design_layout_snackbar_include.view.*
EDIT
I haven't been able to get this to work again, so I'll just share what I think is the cleanest way to write in Kotlin what a few others have already shared:
import com.google.android.material.R as MaterialR
Snackbar.make(root_view, "Yo\nYo\nYo!", Snackbar.LENGTH_SHORT).apply {
val textView = view.findViewById<TextView>(MaterialR.id.snackbar_text)
textView.setSingleLine(false)
show()
}
2021 Answer in Kotlin for com.google.android.material:material:1.4.0
isSingleLine = false is required as well as maxLines = 5
Snackbar.make(view, "line 1\nline 2", BaseTransientBottomBar.LENGTH_INDEFINITE)
.apply {
this.view.findViewById<TextView>(com.google.android.material.R.id.snackbar_text)?.apply {
maxLines = 5
isSingleLine = false
}
}
.show()
An alternative to the suggestions that involve hardcoding the resource ID for the textview contained by the snackbar is to iterate to find the TextView. It's safer long-term and lets you update the support library with minimal fear of the ID changing.
Example:
public static Snackbar getSnackbar(View rootView, String message, int duration) {
Snackbar snackbar = Snackbar.make(rootView, message, duration);
ViewGroup snackbarLayout = (ViewGroup) snackbar.getView();
TextView text = null;
for (int i = 0; i < snackbarLayout.getChildCount(); i++) {
View child = snackbarLayout.getChildAt(i);
// Since action is a button, and Button extends TextView,
// Need to make sure this is the message TextView, not the
// action Button view.
if(child instanceof TextView && !(child instanceof Button)) {
text = (TextView) child;
}
}
if (text != null) {
text.setMaxLines(3);
}
return snackbar;
}
Instead of using setMaxLines, i use setSingleLine to make the textview wrap to its content.
String yourText = "First line\nSecond line\nThird line";
Snackbar snackbar = Snackbar.make(mView, yourText, Snackbar.LENGTH_SHORT);
TextView textView =
(TextView) snackbar.getView().findViewById(android.support.design.R.id.snackbar_text);
textView.setSingleLine(false);
snackbar.show();
this works for me
Snackbar snackbar = Snackbar.make(mView, "Your text string", Snackbar.LENGTH_INDEFINITE);
((TextView) snackbar.getView().findViewById(android.support.design.R.id.snackbar_text)).setSingleLine(false);
snackbar.show();
Late, but might be helpful to someone:
public void showSnackBar(String txt, View view){
final Snackbar snackbar = Snackbar.make(view,txt,Snackbar.LENGTH_INDEFINITE)
.setAction("OK", new View.OnClickListener() {
#Override
public void onClick(View view) {
//do something
}
});
View view = snackbar.getView();
TextView textView = (TextView) view.findViewById(android.support.design.R.id.snackbar_text);
textView.setMaxLines(5);
snackbar.show();
}
May i suggest you to use com.google.android.material.snackbar.Snackbar. This is the recommanded way by google. First you have to add your snackbar.
final Snackbar snackbar = Snackbar.make(
findViewById(R.id.activity_layout),
"snackbar explanation text \n multilines \n\n here",
Snackbar.LENGTH_INDEFINITE)
.setAction(R.string.action_settings, new View.OnClickListener() {
#Override
public void onClick(View view) {
// your action here
}
});
Then to add multilines support
TextView messageView = snackbar.getView().findViewById(R.id.snackbar_text);
messageView.setMaxLines(4);
Finally show the snackbar.
snackbar.show();
A way to do it which won't crash in case things change on newer versions of the library :
Snackbar.make(...).setAction(...) {
...
}.apply {
(view.findViewById<View?>(R.id.snackbar_text) as? TextView?)?.setSingleLine(false)
}.show()
And a way to do it without having ids being used, setting all TextViews in the Snackbar to have unlimited multi-lines :
#UiThread
fun setAllTextViewsToHaveInfiniteLinesCount(view: View) {
when (view) {
is TextView -> view.setSingleLine(false)
is ViewGroup -> for (child in view.children)
setAllTextViewsToHaveInfiniteLinesCount(child)
}
}
Snackbar.make(...).setAction(...) {
...
}.apply {
setAllTextViewsToHaveInfiniteLinesCount(view)
}.show()
The same function in Java:
#UiThread
public static void setAllTextViewsToHaveInfiniteLines(#Nullable final View view) {
if (view == null)
return;
if (view instanceof TextView)
((TextView) view).setSingleLine(false);
else if (view instanceof ViewGroup)
for (Iterator<View> iterator = ViewGroupKt.getChildren((ViewGroup) view).iterator(); iterator.hasNext(); )
setAllTextViewsToHaveInfiniteLines(iterator.next());
}
Just a quick comment, if you are using com.google.android.material:material the prefix or package for R.id should be com.google.android.material
val snackbarView = snackbar.view
val textView = snackbarView.findViewById<TextView>(com.google.android.material.R.id.snackbar_text)
textView.maxLines = 3
so as i am using latest material design library from google, com.google.android.material:material:1.1.0 and i used simple following code snipet below, to resolve allow to more lines in snackbar. hope it will help to new developers as well.
TextView messageView = snackbar.getView().findViewById(R.id.snackbar_text);
messageView.setMaxLines(5);
To avoid flakiness of other answers can use updateMaxLine, this solution is less likely to break if Google decide to change the id of a text view)
val snackBar = Snackbar.make(view, message, duration)
snackBar.view.allViews.updateMaxLine(5)
snackBar.show()
just note, this option will update the max line for all the text views in the Snakbar view (which tbh I do not think it matters)
add this as extension
private fun <T> Sequence<T>.updateMaxLine(maxLine : Int) {
for (view in this) {
if (view is TextView) {
view.maxLines = maxLine
}
}
}
Snackbar height adjustment:
val sMsg = "Msg\n\n"
val sOk = getString(R.string.ok)
val sMoreLines = StringBuilder()
for (iCtr in 1..6) {
sMoreLines.append("\n")
}
Snackbar
.make(
this.requireActivity().findViewById(android.R.id.content),
sMsg,
Snackbar.LENGTH_INDEFINITE)
.setAction("$sMoreLines$sOk\n$sMoreLines") {
// ...
}
.show()