Dynamically change font size in Android

Question

I want to support font resizing with an entry in Preferences (where the user picks among given font size options) or by using a gesture (flinging up/down) as used in popular e-book reader applications such as Aldiko. Flinging up and down along right side of the screen triggered brightness change in Aldiko.

How can I implement this type of dynamic property change? Are there any implementation differences for this in 1.6 and 2.0+ ? Do I have to have different themes pre-configured with different font sizes?

score 8 · Accepted Answer · answered Jul 20 '11 at 12:28

8

Actually, you do it like that:

TextView tv=new TextView(this);

    //either:
    tv.setTextAppearance(this, R.style.textStyle1); //some style you have set up


    ///or: 
    tv.setTextSize(16);
    tv.setTextColor(R.color.myred); //some color you set up

so not a static call to TextView you need an isntance of textview.

answered Jul 20 '11 at 12:28

vallllll

2,731
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Okay, that one is trivial of course. However no such methods are available in Android 1.6. How can I achieve this in 1.6 ? – faraday Jul 20 '11 at 12:30
it works for 1.6 too http://developer.android.com/reference/android/widget/TextView.html you can set filter by api level – vallllll Jul 20 '11 at 12:38

score 3 · Answer 2 · answered Nov 08 '12 at 15:49

3

Try this:

tv.setTextSize(TypedValue.COMPLEX_UNIT_SP, 15);

answered Nov 08 '12 at 15:49

mav_baumer15

183
2
5

Dynamically change font size in Android

2 Answers2