Question

I have developed one application which has 15 screens. Now I want to display custom toast message in all those 15 screens. To do so, I have inflated one layout. But it’s working only on one screen. So, I wrote a single method to display custom Toast on all screens. Whenever I want to display toast message, I would just call that method. But i got java.lang.NullPointerException. How to resolve this? The following is my code,

public static void showToastMessage(String message){

               LayoutInflater inflater = ((Activity) context).getLayoutInflater();

                View layout = inflater.inflate(R.layout.custom_toast,
                  (ViewGroup) ((Activity) context).findViewById(R.id.customToast));
            // set a message
                TextView text = (TextView) layout.findViewById(R.id.text);
                text.setText(message);

                // Toast...
                Toast toast = new Toast(context);
                toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
                toast.setDuration(Toast.LENGTH_LONG);
                toast.setView(layout);
                toast.show();
           }

Log is

java.lang.NullPointerException

    at com.guayama.utilities.CommonMethods.showToastMessage(CommonMethods.java:474)

    at android.view.View.performClick(View.java:3511)

    at android.view.View$PerformClick.run(View.java:14105)

    at android.os.Handler.handleCallback(Handler.java:605)

    at android.os.Handler.dispatchMessage(Handler.java:92)

    at android.os.Looper.loop(Looper.java:137)

    at android.app.ActivityThread.main(ActivityThread.java:4424)

    at java.lang.reflect.Method.invokeNative(Native Method)

Answer 1

change your method

from

showToastMessage(String message)

to

showToastMessage(Context context,String message);

it seems context problem to me

your function will look like this

public static void showToastMessage(Context context,String message){

               LayoutInflater inflater = context.getLayoutInflater();

                View layout = inflater.inflate(R.layout.custom_toast,
                  (ViewGroup) ((Activity) context).findViewById(R.id.customToast));
            // set a message
                TextView text = (TextView) layout.findViewById(R.id.text);
                text.setText(message);

                // Toast...
                Toast toast = new Toast(context);
                toast.setGravity(Gravity.CENTER_VERTICAL, 0, 0);
                toast.setDuration(Toast.LENGTH_LONG);
                toast.setView(layout);
                toast.show();
           }