java.lang.NumberFormatException: Invalid int: ""

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You try to parse a String that contains non-numeric characters to an int. The string must contain decimal characters only, optionally beginning with a + or - sign.

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java.lang.NumberFormatException: Invalid int: ""
at java.lang.Integer.invalidInt(Integer.java:137)
at java.lang.Integer.parseInt(Integer.java:358)
at java.lang.Integer.parseInt(Integer.java:331)
at com.miairline.chooseflight.FlightDataActivity$1.afterTextChanged(FlightDataActivity.java:112)

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