Android TextView decimal size issue

Question

I tested emulators and real devices but as you can see there is no change between 40 dp and 40.2 dp! I'm working on a project with a very high font sensitivity and the issue is behaviour of android text engine.

Is there any way to prevent that?

Please help!

This is the code:

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="SAMPLE TEXT"
            android:textSize="40dp" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="SAMPLE TEXT"
            android:textSize="40.2dp" />

    </LinearLayout>

The result:

See this: https://stackoverflow.com/questions/23981260/should-use-sp-instead-of-dp-for-text-sizes — , Jul 18 '17 at 09:45

score 0 · Answer 1 · answered Jul 18 '17 at 09:47

0

You should always use SP for fonts as it respects the user preferences

<TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="SAMPLE TEXT"
        android:textSize="40sp" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="SAMPLE TEXT"
        android:textSize="40.2sp" />

answered Jul 18 '17 at 09:47

AskNilesh

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Unfortunately there is no change. The issue is behaviour of android text engine. – seyfullah.bilgin Jul 18 '17 at 09:51

score 0 · Answer 2 · answered Jul 18 '17 at 10:13

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="SAMPLE TEXT"
    android:textSize="40sp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="SAMPLE TEXT"
    android:textSize="40.2sp" />

you can see the difference like this(in android studio you need to zoom the layout screen).There is no behavior issue of android text engine.

The issue is behaviour of android text engine absulately. I tried dp, sp, px. I noticed that when the font size is specified with setTextSize method in android textview, the decimals of the font size were determined based on resolution and I realized this by using getTextSize method. There is a kind of rounding mechanism. See also http://imgur.com/a/JpEps — seyfullah.bilgin, Jul 18 '17 at 10:26

Android TextView decimal size issue

2 Answers2