png transparent image file in android -


i want save png image sd card , should without background. in sd card not see background when attach telegram see white background. here code in android:

    file filepath = environment.getexternalstoragedirectory();     file dir = new file(filepath.getabsolutepath() + "/background_eraser/");     dir.mkdirs();     mimagename = "image" + cal.gettimeinmillis() + ".png";     file = new file(dir, mimagename);


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