转载自：Textview

SpannableString使用详解

用SpannableString打造绚丽多彩的文本显示效果

行间距

行与行之间的间距，xml设置lineSpacingExtra属性

lineSpacingMultiplier属性，行与行间距的倍数

android:lineSpacingExtra="3dp"

android:lineSpacingMultiplier="1.5"

字间距

自定义textview

1.继承自Textview，三个构造方法，重写gettext和settext 方法，并且通过这两个方法得到textview的内容以及设置内容

2.通过getSpacing 和 setSpacing 方法得到和设置字体间间距

3.applySpacing

public class RankTextView extends TextView {

private float spacing = Spacing.NORMAL;

private CharSequence originalText;

public RankTextView(Context context) {

super(context);

}

public RankTextView(Context context, AttributeSet attrs) {

super(context, attrs);

}

public RankTextView(Context context, AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

}

public float getSpacing() {

return this.spacing;

}

public void setSpacing(float spacing) {

this.spacing = spacing;

applySpacing();

}

private void applySpacing () {

if (this == null || this.originalText ==  null) {

return;

}

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((spacing + 1) /10),i,i+1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);

}

}

super.setText(finalText,BufferType.SPANNABLE);

}

@Override

public void setText(CharSequence text, BufferType type) {

this.originalText = text;

applySpacing();

}

@Override

public CharSequence getText() {

return originalText;

}

public class Spacing {

public final static float NORMAL = 0;

}

}