TextView font size auto scaling

Question

I have layout, which contain two parts: header and body. Header contain TextView and image. Header height can be changed programmatically. And header's image and text must be scaled respectively. Image scaling ok, but text doesn't want scaling. Is it possible on Android and how to do this?

My layout:

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

    <LinearLayout
        android:id="@+id/header"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        tools:ignore="UseCompoundDrawables" >

        <TextView
            android:id="@+id/title_text"
            android:layout_width="0dip"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/app_name" />

        <ImageView
            android:id="@+id/edit_button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:contentDescription="@string/edit"
            android:src="@drawable/widget_edit" />
    </LinearLayout>

    <TextView
        android:id="@+id/content_text"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>

No it is not doable using xml. You are referring to iphone's scaleToFit — Sherif elKhatib, Sep 10 '12 at 09:55
Try this http://stackoverflow.com/questions/5033012/auto-scale-textview-text-to-fit-within-bounds/17782522#17782522 — M-WaJeEh, Jul 22 '13 at 08:15

score 1 · Accepted Answer · answered Sep 10 '12 at 09:59

I don't think that this is viable with the default TextView - at least not without some hacking.

I'd try using a custom View class for this, and draw the text on its Canvas. During the draw call, you know the exact width and height of the canvas and draw text with the appropriate font size.

score 1 · Answer 2 · edited Jan 04 '14 at 18:18

1

If you change the height programmatically you can define a formula and calculate the size of the text. It's the unique way, I think.

You may implement a custom view and define the size in function of parent's height.

Exist a kind of unit that could be util, sp (Scale-independent Pixels). But this scale with the size of the text set in the system.

edited Jan 04 '14 at 18:18

BenMorel

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answered Sep 10 '12 at 10:05

JMPergar

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Thank's to all for answers! I will think. – BArtWell Sep 10 '12 at 10:28

TextView font size auto scaling

2 Answers2