Android password hint font problem

If you working with password EditText and you enable input password by

edtPassword.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);

you will face font problem in some device (list at the end of my answer)

For example,

If I use android:inputType="textPassword", this problem don't happened

To fix this problem, there are some ways

1. Use setTransformationMethod instead inputType

    edtPassword.setTransformationMethod(PasswordTransformationMethod.getInstance());

=> Font will working well however the keyboard display not very well (it only display text, don't display number on top of text)

2. Use Typeface.DEFAULT

    setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
    setTypeface(Typeface.DEFAULT);

=> Keyboard display well, font may working not well. Example sans-serif-light is a default font for all View in my application => after setTypeface(Typeface.DEFAULT), the EditText font still look different

3. Use android:fontFamily="sans-serif"
   For some device, it will CRASH, check my answer here https://stackoverflow.com/a/52421199/5381331. And also font still look different

MY SOLUTION

cache the typeface before setInputType then reuse it

Typeface cache = edtPassword.getTypeface();
edtPassword.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
edtPassword.setTypeface(cache);

Device testing

Some device face font problem

• Xiaomi A2 (8.0.1)
• Pixel XL (8.1.0)
• Sony Xperia Z5 Au (SOV32) (6.0)
• Arrow NX (F-04G) (6.0.1)
• Kyocera (S2) (7.0)

Some device not face font problem

• Samsung S4 (SC-04E) (5.0.1)
• Samsung Galaxy Node 5 (5.1.1)
• Samsung S7 Edge (SM-G935F) (7.0)