This is based on an open source autosizing textview for Android.

Elliott Chenger

Last update: Dec 29, 2022

Related tags

Label / Form SizeAdjustingTextView

Overview

SizeAdjustingTextView

This is based on an open source autosizing textview for Android I found a few weeks ago. The initial approach didn't resize multiple lines and wasn't maintained to keep up with changes in Android. I decided to go ahead and create this as a place to preserve the auto sizing text view as well as giving it a platform for some change and to possibly add some features and functionality.

Usage

To use the SizeAdjustingTextView make sure you have the custom view somewhere in your project. From there when using XML Layouts you can simply use the com.some.package.name.SizeAdjustingTextView widget and thats it. From there you need to make sure that you set a text size as the baseline for the view.

<com.example.sizeadjustingtextview.view.SizeAdjustingTextView
        android:layout_width="fill_parent"
        android:layout_height="100dp"
        android:id="@+id/topBox"
        android:layout_below="@id/text_input"
        android:gravity="center"
        android:padding="0dp"
        android:textSize="60sp" />

Lastly when using custom views in XML, make sure you have the XLMNS tag in the root of the layout tag.

 xmlns:app="http://schemas.android.com/apk/res/com.example.SizeAdjustingTextView"

I didn't want to make this a library because there is no need for adding a library for one view. Just port over the SizeAdjustingTextView and you should be good.

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Comments

Doesn't work when increasing the view's height.

Here's how to fix it.

private float findNewTextSize(int width, int height, CharSequence text) {
        TextPaint textPaint = new TextPaint(getPaint());
        float targetTextSize = getMaxTextSize();  // Start from the max size
        int textHeight = getTextHeight(text, textPaint, width, targetTextSize);
        while(textHeight > height && targetTextSize > mMinTextSize) {
            targetTextSize = Math.max(targetTextSize - 1, mMinTextSize);
            textHeight = getTextHeight(text, textPaint, width, targetTextSize);
        }
        return targetTextSize;
    }

opened by sebouh00 0

Bug: very slow , truncates text and puts characters on next line
All I wanted is that it would fit into it boundaries.

Using the next XML will make it very slow and also truncate the text:

<com.omitneedlesscode.sizeadjustingtextview.SizeAdjustingTextView android:layout_width="180dp" android:layout_height="203dp" android:layout_below="@+id/text_input" android:maxLines="2" android:text="content text sample" android:textSize="1000dp"/>

And this is what I got :

plus it was very slow.

note that I've set 1000dp so that it will resize to the max that it can. a better way is to do it in code.

I think it should work this way: using the current configurations of the TextView, if it failed to fit, try to find a font that will make it fit. if failed with this, try to add a line (till reaching max lines that were set), and for each iteration there try to fit the font.

For the font checking, I think it should use binary search, instead of decreasing by 1 .
opened by AndroidDeveloperLB 0

This is based on an open source autosizing textview for Android.

Related tags

Overview

SizeAdjustingTextView

Usage

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Comments

Doesn't work when increasing the view's height.

Bug: very slow , truncates text and puts characters on next line

Owner

Elliott Chenger

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