Han Qin . Me

Always being better

Android Toast Usages and Tests

Usage tips

I have been perplexed for a long time by the duration parameter of android Toast function, before I noticed the warning message from android studio

images

The right way is

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Toast.makeText(activity, "Email was sent successfully.", Toast.LENGTH_LONG).show();

or

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Toast.makeText(activity, "Email was sent successfully.", Toast.LENGTH_SHORT).show();

Test

I will demonstrate how to test toast function with Robolectric

1, For default toast message

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Toast toast = ShadowToast.getLatestToast();
String text = Robolectric.shadowOf(toast).text;

Also, you can use

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String text = ShadowToast.getTextOfLatestToast();

To check shown toast count

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int count = ShadowToast.shownToastCount();

To verify a toast message has been displayed

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CharSequence message = "custom message"
boolean showed = ShadowToast.showedToast(message);

To get all shown toasts

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List<Toast> toasts = Robolectric.getShadowApplication().getShownToasts();

To reset all shown toasts list

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ShadowToast.reset(); // or..
Robolectric.getShadowApplication().getShownToasts().clear();

2, For custom toasts

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CharSequence message = "custom message";
int layoutResourceIdToCheckForMessage = R.id.custom_toast_text_view_id;
boolean showed = ShadowToast.showedCustomToast(message, layoutResourceIdToCheckForMessage);

For busy developers who don’t have time to look at source codes of robolectric. :)

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