Android EditText提示大小

时间：2010-06-29 10:09:48

标签： android

如何减少EditText提示尺寸？

12 个答案:

答案 0 :(得分：108)

您可以通过在字符串recource中设置大小来实现。

例如：

<string name="edittext_hint"><font size="15">Hint here!</font></string>

然后在你的XML中写一下

android:hint="@string/edittext_hint"

这将在提示的较小文本中复制，但输入文本的原始大小。

希望这有助于未来的读者

答案 1 :(得分：53)

您可以减少EditText上的字体大小 - 这也会减少hint的大小。即android:textSize="16sp"

答案 2 :(得分：35)

我也必须这样做，因为我的提示不适合标准尺寸的EditText。所以我这样做了（在xml中将textSize设置为mHintTextSize）：

MYEditText.addTextChangedListener(new TextWatcher(){

                @Override
                public void afterTextChanged(Editable arg0) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void beforeTextChanged(CharSequence arg0, int arg1,
                        int arg2, int arg3) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void onTextChanged(CharSequence arg0, int start, int before,
                        int count) {
                    if (arg0.length() == 0) { 
                        // No entered text so will show hint
                        editText.setTextSize(TypedValue.COMPLEX_UNIT_SP, mHintTextSize);
                    } else {
                        editText.setTextSize(TypedValue.COMPLEX_UNIT_SP, mRealTextSize);
                    }
                }
        });

答案 3 :(得分：31)

您可以将简单的HTML属性设置为提示字符串本身。

请参阅此处接受的答案： Android EditText hint

编辑：我自己玩过，这对我有用：

view.setHint(Html.fromHtml("<small><small><small>" + 
             getString(R.string.hint) + "</small></small></small>"));

这是fromHtml接受的标签列表： http://commonsware.com/blog/Android/2010/05/26/html-tags-supported-by-textview.html （虽然对我不起作用）

答案 4 :(得分：9)

如果您想以编程方式执行此操作，

SpannableString span = new SpannableString(strHint);
span.setSpan(new RelativeSizeSpan(0.5f), 0, strHint.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
editText.setHint(span);

答案 5 :(得分：8)

很容易减少edittext的提示大小

editText.setHint(Html.fromHtml(
    "<font size=\"5\">" + "hinttext1" + "</font>" + 
    "<small>" + "hinttext2" + "</small>" ));

答案 6 :(得分：1)

@marmor的方法是最好的方法。您可以更改<small> --- </small>代码的数量以调整大小。

您也可以像我一样直接定义提示文本

view.setHint(Html.fromHtml("<small><small><small>" + "This is Hint" + "</small></small></small>"));

希望这会有所帮助。

答案 7 :(得分：1)

@ user2982553的解决方案对我很有帮助。您还可以使用AbsoluteSizeSpan，您可以使用<font size=\"5\">设置提示的确切字体大小。不要使用size标记，因为{{1}}属性只是被忽略。

答案 8 :(得分：1)

在values。文件夹中的strings.xml中定义它：

<string name="enter_otp"><font size="16">your text</font></string>

答案 9 :(得分：0)

我需要为真实文本设置比提示更大的尺寸。

public static class LargeSizeTextWatcher implements TextWatcher {

    private final EditText mEditText;
    private final int mOriginalSize;
    private final int mLargeSize;

    private int mLastLength;

    TrackingNumberTextWatcher(EditText editText) {
        mEditText = editText;
        mOriginalSize = (int) editText.getTextSize();
        mLargeSize = editText.getResources().getDimensionPixelSize(R.dimen.text_size_large);

        mLastLength = editText.length();
        if (mLastLength != 0) {
            mEditText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mLargeSize);
        }
    }

    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
    }

    @Override
    public void afterTextChanged(Editable s) {
        int length = s.length();
        if (length == 0) {
            mEditText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mOriginalSize);
        } else if (mLastLength == 0) {
            mEditText.setTextSize(TypedValue.COMPLEX_UNIT_PX, mLargeSize);
        }
        mLastLength = length;
    }
}

答案 10 :(得分：0)

您不仅可以更改提示的大小，还可以更改其字体和样式。我使用SpannableString和MetricAffectingSpan

来实现解决方案

1）创建自定义Hint对象： 

import android.graphics.Typeface;
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.MetricAffectingSpan;

public class CustomHint extends SpannableString
{
    public CustomHint(final CharSequence source, final int style)
    {
        this(null, source, style, null);
    }

    public CustomHint(final CharSequence source, final Float size)
    {
        this(null, source, size);
    }

    public CustomHint(final CharSequence source, final int style, final Float size)
    {
        this(null, source, style, size);
    }

    public CustomHint(final Typeface typeface, final CharSequence source, final int style)
    {
        this(typeface, source, style, null);
    }

    public CustomHint(final Typeface typeface, final CharSequence source, final Float size)
    {
        this(typeface, source, null, size);
    }

    public CustomHint(final Typeface typeface, final CharSequence source, final Integer style, final Float size)
    {
        super(source);

        MetricAffectingSpan typefaceSpan = new CustomMetricAffectingSpan(typeface, style, size);
        setSpan(typefaceSpan, 0, source.length(), Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
    }
}

2）创建自定义MetricAffectingSpan对象： 

import android.graphics.Typeface;
import android.text.TextPaint;
import android.text.style.MetricAffectingSpan;

public class CustomMetricAffectingSpan extends MetricAffectingSpan
{
    private final Typeface _typeface;
    private final Float    _newSize;
    private final Integer  _newStyle;

    public CustomMetricAffectingSpan(Float size)
    {
        this(null, null, size);
    }

    public CustomMetricAffectingSpan(Float size, Integer style)
    {
        this(null, style, size);
    }

    public CustomMetricAffectingSpan(Typeface type, Integer style, Float size)
    {
        this._typeface = type;
        this._newStyle = style;
        this._newSize = size;
    }

    @Override
    public void updateDrawState(TextPaint ds)
    {
        applyNewSize(ds);
    }

    @Override
    public void updateMeasureState(TextPaint paint)
    {
        applyNewSize(paint);
    }

    private void applyNewSize(TextPaint paint)
    {
        if (this._newStyle != null)
            paint.setTypeface(Typeface.create(this._typeface, this._newStyle));
        else
            paint.setTypeface(this._typeface);

        if (this._newSize != null)
            paint.setTextSize(this._newSize);
    }
}

3）使用： 

Typeface newTypeface = Typeface.createFromAsset(getAssets(), "AguafinaScript-Regular.ttf");
CustomHint customHint = new CustomHint(newTypeface, "Enter some text", Typeface.BOLD_ITALIC, 60f);
        //        CustomHint customHint = new CustomHint(newTypeface, "Enter some text", Typeface.BOLD_ITALIC);
        //        CustomHint customHint = new CustomHint(newTypeface, "Enter some text", 60f);
        //        CustomHint customHint = new CustomHint("Enter some text", Typeface.BOLD_ITALIC, 60f);
        //        CustomHint customHint = new CustomHint("Enter some text", Typeface.BOLD_ITALIC);
        //        CustomHint customHint = new CustomHint("Enter some text", 60f);

customEditText.setHint(customHint);

答案 11 :(得分：0)

使用onFocusChanged（）侦听器更改提示字体大小也是一种选择，因为当用户单击文本字段时addTextChangeListener（）不会触发，并且闪烁的光标将调整为提示字体大小。

此外，与TextChangeListener不同，不需要单独设置初始提示字体大小。

class EditTextWithHintSize {
 init {
        val typedArray = context.obtainStyledAttributes(attrs,
                R.styleable.EditTextWithHintSize, 0, defStyle)
        try {
            hintFontSize = typedArray.getDimension(R.styleable.EditTextWithHintSize_hint_font_size, textSize)
            fontSize = textSize

            if (length() == 0) {
                setTextSize(TypedValue.COMPLEX_UNIT_PX, hintFontSize)
            }
        } catch (e: Exception) {
            hintFontSize = textSize
            fontSize = textSize
        } finally {
            typedArray.recycle()
        }
    }

    override fun onFocusChanged(focused: Boolean, direction: Int, previouslyFocusedRect: Rect?) {
        super.onFocusChanged(focused, direction, previouslyFocusedRect)

        if (focused) {
            setTextSize(TypedValue.COMPLEX_UNIT_PX, fontSize)
        } else {
            if (length() == 0) {
                setTextSize(TypedValue.COMPLEX_UNIT_PX, hintFontSize)
            } else {
                setTextSize(TypedValue.COMPLEX_UNIT_PX, fontSize)
            }
        }
    }
}
相关问题
最新问题