EditText提示和文本大小不同的文本

Question

我正在尋找如何在編輯文本中爲提示和用戶輸入文本設置不同的文本大小。我對此有兩個問題。 1）是否可以爲提示和用戶輸入顯示不同大小的文本？ 2）如果是，那我們該怎麼做到？ 我指Android EditText Hint Size 鏈接，但任何其他可供選擇像自定義樣式。 請引導我一樣。

Answer 1

使用此代碼..

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

Answer 2

使用HTML不夠靈活。我會建議使用另一種方式。您需要自定義SpannableString和MetricAffectingSpan。

1）創建自定義Hint對象：

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）創建的自定義對象MetricAffectingSpan：

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);