浮动标签的EditText和TextInputLayout变更字体

问题描述

有人试图改变浮动标签的字体？我改变的EditText的来源，但在浮动标签并没有改变的字体，我非常感谢那些谁帮我

Someone tried to change the font of the floating label? I changed the source of EditText but the font of the floating label did not change, I am very grateful to those who help me

code：

               <android.support.design.widget.TextInputLayout
                    android:id="@+id/tilTextoDescricao"
                    android:layout_width="fill_parent"
                    android:layout_height="wrap_content"
                    android:layout_toRightOf="@id/tilValorUnidade"
                    android:layout_marginTop="10dp">

                    <EditText
                        android:id="@+id/etTextoDescricao"
                        android:layout_width="fill_parent"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="5dp"
                        android:hint="Descrição"
                        android:textSize="15dp"
                        android:inputType="text" />

                </android.support.design.widget.TextInputLayout>

-----------------

   etTextoDescricao= (EditText) findViewById(R.id.etTextoDescricao);
  etTextoDescricao.setTypeface(CustomTypeface.getTypefaceMediumDefault(this));

推荐答案

不幸的是，你将不得不使用反射来处理这个问题。

Unfortunately, you'll have to use reflection to handle this.

浮动标签由 Col​​lapsingTextHelper ，这是一个内部的，包私有类，而不是设置来处理跨绘制。因此，使用像自定义 TypefaceSpan 将不会在这种情况下工作。

The floating label is drawn by CollapsingTextHelper, which is an internal, package-private class and isn't setup to handle spans. So, using something like a custom TypefaceSpan won't work in this case.

由于这个使用反射，它不能保证在今后的工作。

Because this uses reflection, it isn't guaranteed to work in the future.

执行

final Typeface tf = Typeface.createFromAsset(getAssets(), "your_custom_font.ttf");
final TextInputLayout til = (TextInputLayout) findViewById(R.id.yourTextInputLayout);
til.getEditText().setTypeface(tf);
try {
    // Retrieve the CollapsingTextHelper Field
    final Field cthf = til.getClass().getDeclaredField("mCollapsingTextHelper");
    cthf.setAccessible(true);

    // Retrieve an instance of CollapsingTextHelper and its TextPaint
    final Object cth = cthf.get(til);
    final Field tpf = cth.getClass().getDeclaredField("mTextPaint");
    tpf.setAccessible(true);

    // Apply your Typeface to the CollapsingTextHelper TextPaint
    ((TextPaint) tpf.get(cth)).setTypeface(tf);
} catch (Exception ignored) {
    // Nothing to do
}

错误观点

如果您需要更改错误的字体，你可以做两件事之一：

If you needed to change the font of the error, you could do one of two things:

1. 使用反射抢误差的TextView 并应用字样就像前
2. 使用自定义的范围。不像浮动标签，使用 TextInputLayout 错误观点仅仅是一个的TextView ，所以它能够处理跨越。

1. Use Reflection grab the error TextView and apply the Typeface much like before
2. Use a custom span. Unlike the floating label, the error view used by TextInputLayout is just a TextView, so it's able to handle spans.

使用反射

final Field errorField = til.getClass().getDeclaredField("mErrorView");
errorField.setAccessible(true);
((TextView) errorField.get(til)).setTypeface(tf);

使用自定义范围

final SpannableString ss = new SpannableString("Error");
ss.setSpan(new FontSpan(tf), 0, ss.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
til.setError(ss);

private static final class FontSpan extends MetricAffectingSpan {

    private final Typeface mNewFont;

    private FontSpan(Typeface newFont) {
        mNewFont = newFont;
    }

    @Override
    public void updateDrawState(TextPaint ds) {
        ds.setTypeface(mNewFont);
    }

    @Override
    public void updateMeasureState(TextPaint paint) {
        paint.setTypeface(mNewFont);
    }

}

结果

我使用的字体是冰沙专柜。

这篇关于浮动标签的EditText和TextInputLayout变更字体的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！