方法：

1.自定义字体，在其中添加间距，较复杂

2.字母间加空格，不太可取，宽度不灵活

3.用textScaleX和space，自定义TextView,让textScaleX只改变间距，不改变字体

4.复写onDraw，每次画一个字符，手动控制每个字符的位置。

下面提供方法3的代码，参考链接：

https://stackoverflow.com/questions/14283246/change-text-kerning-or-spacing-in-textview

package nl.raakict.android.spc.widget;

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.BIGGEST;

private CharSequence originalText = "";

public LetterSpacingTextView(Context context) {

super(context);

}

public LetterSpacingTextView(Context context, AttributeSet attrs){

super(context, attrs);

originalText = super.getText();

applyLetterSpacing();

this.invalidate();

}

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++) {

String c = ""+ originalText.charAt(i);

builder.append(c.toLowerCase());

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;

public final static float NORMALBIG = (float)0.025;

public final static float BIG = (float)0.05;

public final static float BIGGEST = (float)0.2;

}

}

原文：http://www.cnblogs.com/ryq2014/p/6897769.html