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The source code is released under:
MIT License
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package io.openhc.ohc.ui.input.filter; /* ww w. ja va 2s . c o m*/ import android.text.InputFilter; import android.text.Spanned; import io.openhc.ohc.basestation.device.Field; public class Input_filter_string implements InputFilter { private Field field; public Input_filter_string(Field field) { this.field = field; } @Override public CharSequence filter(CharSequence input, int start, int end, Spanned dest, int dstart, int dend) { String s = input.toString(); if(s.length() >= this.field.get_min() && s.length() <= this.field.get_max()) return null; return ""; } }