how to increase and decrease textview font size in android

Question

0.00/5 (No votes)

See more:

i have 2 button for increase and decrease TextView font size

btnZoomin.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
txtview.setTextSize(txtview.getTextSize()+1);
}
});
btnZoomout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
txtview.setTextSize(txtview.getTextSize()-1);
}
});
but this code doesnt work!!!!

Posted 7-Apr-15 0:55am

mohamad atrian

Updated 29-May-20 7:29am

Add a Solution

2 solutions

Solution 2

Just modify the lines;

txtview.setTextSize(txtview.getTextSize()+1);

with

txtview.setTextSize(TypedValue.COMPLEX_UNIT_SP, txtview.getTextSize() + 1);

and

txtview.setTextSize(txtview.getTextSize()-1);

with

txtview.setTextSize(TypedValue.COMPLEX_UNIT_SP, txtview.getTextSize() - 1);

Posted 29-May-20 7:30am

Member 14847687

Add a Solution

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Accepted Answer · 2015-04-07T02:33:00

Solution 1

See the description at http://developer.android.com/reference/android/widget/TextView.html#getTextSize()[^]; the size is in pixels, which is quite a small increases on an Android screen. You need to use a larger value, based on the actual font size.

Posted 7-Apr-15 2:33am

Richard MacCutchan

how to increase and decrease textview font size in android

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0

how to increase and decrease textview font size in android

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0

Existing Members

...or Join us