Toast.getView() returns null on Android 11 (API 30)

Question

I just installed the Android R (API 30) image in my emulator to try my app, and it crashed when trying to set the Background color of a Toast.

    Toast toast = Toast.makeText(ctxt, msg, duration);     View view = toast.getView();     view.setBackgroundColor(0xFF303030);     TextView tview = view.findViewById(android.R.id.message);     tview.setTextColor(Color.WHITE);     toast.show(); 

This is really strange as in Android Q (API 29) works perfectly.

My build.gradle updated for Android R (API 30)

    compileSdkVersion 30     buildToolsVersion "30.0.1" 

Is there a new way to do it??

Answer 1

Since Android 11, custom toasts/ toast modifications are deprecated, according to Google to "protect users". Hence why your app in Android 30 is not able to display custom toasts.

From Android Developers documentation:

Custom toast views are deprecated. Apps can create a standard text toast with the makeText(android.content.Context, java.lang.CharSequence, int)

Answer 2

The only way I have found of showing custom toasts from API 30 onwards is by creating them ad hoc.

XML LAYOUT
Customize as needed

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout   xmlns:android="http://schemas.android.com/apk/res/android"   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"   tools:context=".main_activity">            <!--Ad hoc toast Textview-->         <TextView             android:layout_width="match_parent"             android:layout_height="wrap_content"             android:padding="12dp"             android:layout_margin="18dp"             android:background="@drawable/ad_hoc_toast_background"             android:textColor="#1e1e1e"             android:gravity="center"             android:visibility="gone"             android:layout_alignParentBottom="true"             android:id="@+id/ad_hoc_toast_textview"             tools:text="Temporary message bla bla bla ..."/>    </RelativeLayout> 

TOAST BACKGROUND (ad_hoc_toast_background.xml)
Customize as needed

<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item>     <shape              xmlns:android="http://schemas.android.com/apk/res/android"              android:shape="rectangle">          <size                  android:width="220dp"                  android:height="100dp"/>         <corners                  android:radius="25dp"             />          <solid                  android:color="#e6ffffff"             />     </shape> </item> </selector> 

Define the show_ad_hoc_toast() method

private void show_ad_hoc_toast(final TextView ad_hoc_toast_textview, String text){       //Set the text     ad_hoc_toast_textview.setText(text);       //Create alpha animation     AlphaAnimation animation1 = new AlphaAnimation(0f, 1f);      //Set duration     animation1.setDuration(300);      //Set that the animation changes persist once the animation finishes     animation1.setFillAfter(true);       //Set on AnimationEnd Listner     animation1.setAnimationListener(new Animation.AnimationListener() {          @Override public void onAnimationStart(Animation animation){}         @Override public void onAnimationRepeat(Animation animation){}         @Override public void onAnimationEnd(Animation animation){              //After 2250 millis -> hide the toast             new CountDownTimer(2250, 1) {                 public void onTick(long millisUntilFinished){}                 public void onFinish() {hide_ad_hoc_toast(ad_hoc_toast_textview);}             }.start();           }      });       //Make the view visible     ad_hoc_toast_textview.setVisibility(View.VISIBLE);       //Start animation     ad_hoc_toast_textview.startAnimation(animation1);   } 

Define the hide_ad_hoc_toast() method

private void hide_ad_hoc_toast(final TextView ad_hoc_toast_textview){       //Create alpha animation     AlphaAnimation animation1 = new AlphaAnimation(1f, 0f);      //Set duration     animation1.setDuration(300);      //Set that the animation changes persist once the animation finishes     animation1.setFillAfter(true);       //Set on AnimationEnd Listner     animation1.setAnimationListener(new Animation.AnimationListener() {          @Override public void onAnimationStart(Animation animation) { }         @Override public void onAnimationRepeat(Animation animation) { }         @Override public void onAnimationEnd(Animation animation) {              //Make the view gone             ad_hoc_toast_textview.setVisibility(View.GONE);          }      });        //Start animation     ad_hoc_toast_textview.startAnimation(animation1);    } 

Call the method from your code when needed

//Find ad_hoc_toast textview TextView ad_hoc_toast_textview = findViewById(R.id.ad_hoc_toast_textview);  //Define the text to be shown String text = "This is the custom toast message"  //Show the ad_hoc toast show_ad_hoc_toast(ad_hoc_toast_textview, text);   

RESULT