How to Delete Image From SDCard in Android [duplicate]

This question already has answers here: Android file delete leaves empty placeholder in Gallery (9 answers) Closed 8 years ago.

File file = new File(imagePath); 
boolean deleted = file.delete(); 

using this code image delete on current screen But it not deleted from SDCard. so Please An开发者_开发技巧yone who know Answer please Post it.

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file.delete(); Its not delete File or Images.