Toast not appearing on Android 4.4 KitKat

问题

I have an application that uses Toast and I have tested it on a Samsung Galaxy II using Android 4.3 and it works fine.

I have recently gotten a Nexus 5 running Android 4.4 KitKat and when I try to load the Toast it doesn't appear.

Has Toast been removed or the syntax altered in KitKat?

This is the code I'm using to make and call the Toast:

@Override
public boolean onMenuItemSelected(int featureId, MenuItem item)
{
    int itemId = item.getItemId();
    switch (itemId) {

    case R.id.action_settings:
        Log.e("TOAST","This was called");
        Toast.makeText(MainActivity.this, "This is my Toast message!",Toast.LENGTH_LONG).show();
        break;
    }
    return true;
}

I have Debugged the code and stepped through this part line by line so it is definitely being called, but nothing happens.

回答1:

Use this instead of getApplicationContext()

回答2:

Better use YourActivity.this instead of getApplicationContext()

EDIT :

Code seems valid.the issue is either nexus or kitkat.

• give a try by rebooting your cell.
• give a try by firing the toast from onResume(). just to make sure that it is working fine from UI thread.

来源：https://stackoverflow.com/questions/20373751/toast-not-appearing-on-android-4-4-kitkat