Fixed java.lang.NumberFormatException: For input string: "xxx"

[rtugeek]

android:digits="0123456789ABCDEFabcdef" not working in some third party input method. use String#replaceAll() for a workaround.

Process Name: 'com.example.countdown'
Thread Name: 'main'
Back traces starts.
java.lang.NumberFormatException: For input string: "反推"
	at java.lang.Integer.parseInt(Integer.java:608)
	at com.jaredrummler.android.colorpicker.ColorPickerDialog.parseColorString(ColorPickerDialog.java:398)
	at com.jaredrummler.android.colorpicker.ColorPickerDialog.afterTextChanged(ColorPickerDialog.java:354)
	at android.widget.TextView.sendAfterTextChanged(TextView.java:9444)
	at android.widget.TextView$ChangeWatcher.afterTextChanged(TextView.java:12203)
	at android.text.SpannableStringBuilder.sendAfterTextChanged(SpannableStringBuilder.java:1262)
	at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:574)
	at androidx.emoji2.text.SpannableBuilder.replace(SpannableBuilder.java:314)
	at android.text.SpannableStringBuilder.replace(SpannableStringBuilder.java:504)
	at androidx.emoji2.text.SpannableBuilder.replace(SpannableBuilder.java:304)
	at androidx.emoji2.text.SpannableBuilder.replace(SpannableBuilder.java:48)
	at android.view.inputmethod.BaseInputConnection.replaceText(BaseInputConnection.java:863)
	at android.view.inputmethod.BaseInputConnection.commitText(BaseInputConnection.java:208)
	at com.android.internal.widget.EditableInputConnection.commitText(EditableInputConnection.java:187)