Autosize TextView 只变小不变大的问题

背景

android 提供 Autosizing TextViews

兼容配制

 app:autoSizeMaxTextSize="30dp"
 app:autoSizeMinTextSize="4dp"
 app:autoSizeTextType="uniform"

问题描述

在使用的过程中，TextView的height设置成wrap_content,显示的text size 只会变成的更小，从来不会再变大。

The issue I've seen with this is that setting your view height to be wrap_content allows the text size to get smaller, but the text will never get bigger again.

解决方案

1.TextView layout_height设置成固定高度

2.通过设置Text时，动态改变autosize配制

public static void setAutoSizeText(final TextView textView, String content) {
        final int minSize = TextViewCompat.getAutoSizeMinTextSize(textView);
        final int maxSize = TextViewCompat.getAutoSizeMaxTextSize(textView);
        //关闭autosize
        TextViewCompat.setAutoSizeTextTypeWithDefaults(textView, TextViewCompat.AUTO_SIZE_TEXT_TYPE_NONE);

        if (minSize <= 0 || maxSize <= 0) {
            //说明没有配制相关的属性
            textView.setText(content);
            return;
        }

        textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, TextViewCompat.getAutoSizeMaxTextSize(textView));
        //开启autosize
        textView.setText(content);
        textView.post(new Runnable() {
            @Override
            public void run() {
                TextViewCompat.setAutoSizeTextTypeUniformWithConfiguration(textView,
                        minSize, maxSize
                        , Math.max(1, TextViewCompat.getAutoSizeStepGranularity(textView)), TypedValue.COMPLEX_UNIT_PX);
            }
        });

    }

相关资料

https://developer.android.com/guide/topics/ui/look-and-feel/autosizing-textview

https://stackoverflow.com/questions/50696258/autosizing-textviews-in-recyclerview-causes-text-size-to-decrease