設置字間距

來源： http://stackoverflow.com/questions/1640659/how-to-adjust-text-kerning-in-android-textview/16429758#16429758

一、直接設置

   
   
   
   

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

   
   
   
   
public static Spannable applyKerning(CharSequence src, float kerning, int start, int end){ if (src == null)  return null;  final int srcLength = src.length();  if (srcLength < 2)  return src instanceof Spannable ? (Spannable)src: new SpannableString(src);  if (start < 0)  start = 0;  if (end > srcLength)  end = srcLength;  final String nonBreakingSpace = "\u00A0";  final SpannableStringBuilder builder = src instanceof SpannableStringBuilder ? (SpannableStringBuilder)src: new SpannableStringBuilder(src);  for (int i = src.length(); i >= 1; i--) {  builder.insert(i, nonBreakingSpace);  builder.setSpan(new ScaleXSpan(kerning), i, i + 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); }  return builder;}

二、自定義控件

   
   
   
   

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

   
   
   
   
/** * Text view that allows changing the letter spacing of the text. *  * @author Pedro Barros (pedrobarros.dev at gmail.com) * @since May 7, 2013 */import android.content.Context;import android.text.Spannable;import android.text.SpannableString;import android.text.style.ScaleXSpan;import android.util.AttributeSet;import android.widget.TextView;public class LetterSpacingTextView extends TextView { private float letterSpacing = LetterSpacing.NORMAL; private CharSequence originalText = ""; public LetterSpacingTextView(Context context) { super(context); } public LetterSpacingTextView(Context context, AttributeSet attrs){ super(context, attrs); } public LetterSpacingTextView(Context context, AttributeSet attrs, int defStyle){ super(context, attrs, defStyle); } public float getLetterSpacing() { return letterSpacing; } public void setLetterSpacing(float letterSpacing) { this.letterSpacing = letterSpacing; applyLetterSpacing(); } @Override public void setText(CharSequence text, BufferType type) { originalText = text; applyLetterSpacing(); } @Override public CharSequence getText() { return originalText; } private void applyLetterSpacing() { StringBuilder builder = new StringBuilder(); for(int i = 0; i < originalText.length(); i++) { builder.append(originalText.charAt(i)); if(i+1 < originalText.length()) { builder.append("\u00A0"); } } SpannableString finalText = new SpannableString(builder.toString()); if(builder.toString().length() > 1) { for(int i = 1; i < builder.toString().length(); i+=2) { finalText.setSpan(new ScaleXSpan((letterSpacing+1)/10), i, i+1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); } } super.setText(finalText, BufferType.SPANNABLE); } public class LetterSpacing { public final static float NORMAL = 0; }}

調用方法：

   
   
   
   

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

    
    
    
    

   
   
   
   
LetterSpacingTextView textView = new LetterSpacingTextView(context);textView.setLetterSpacing(10); //Or any float. To reset to normal, use 0 or LetterSpacingTextView.LetterSpacing.NORMALtextView.setText("My text");//Add the textView in a layout, for instance:((LinearLayout) findViewById(R.id.myLinearLayout)).addView(textView);

來自爲知筆記(Wiz)