TextView

1.设置字与字之间的距离

public class SpacingTextView extends TextView{
    private float letterSpacing = LetterSpacing.BIGGEST;
    private CharSequence originalText = "";


    public SpacingTextView(Context context) {
        super(context);
    }

    public SpacingTextView(Context context, AttributeSet attrs){
        super(context, attrs);
        originalText = super.getText();
        applyLetterSpacing();
        this.invalidate();
    }

    public SpacingTextView(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;
    }

    /**
     * 字距为任何字符串（技术上，一个简单的方法为CharSequence不使用）的TextView
     */
    private void applyLetterSpacing() {
        if (this == null || this.originalText == null) return;
        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;
    }
}

2.设置行间距

https://www.cnblogs.com/yejiurui/p/3822683.html

1、android:lineSpacingExtra
设置行间距，如”8dp”。

2、android:lineSpacingMultiplier
设置行间距的倍数，如”1.5″。

3.添加文本

append(String)

4.换行排版问题

https://blog.csdn.net/dai_zhenliang/article/details/24357889

5.自适应TextView字体大小

https://github.com/grantland/android-autofittextview

6.部分字体样式变化

https://www.cnblogs.com/kingsam/p/5643598.html

7.文字过长时省略部分或者滚动显示

https://www.cnblogs.com/fly_binbin/archive/2012/08/18/2645074.html

8.文字加下划线

如果是在资源文件里，可以这样写

<resources>
         <string name="hello"><u>phone: 1390123456</u></string>
    </resources>

如果是代码这样写

    TextView textView = (TextView)findViewById(R.id.testView); 
    textView.setText(Html.fromHtml("<u>"+"hahaha"+"</u>"));

9.设置跳转链接

http://blog.csdn.net/wx_962464/article/details/8471195 （自动识别超链接，点击就自动跳转网页；自动识别手机号，点击就打电话，加个autoLink属性就ok了。）

跳转到特定的activity
http://my.oschina.net/fengheju/blog/176105

跳转到网页
http://blog.sina.com.cn/s/blog_588508f80101292b.html

注意：给text设置link属性

http://zhidao.baidu.com/link?url=sGk8C0mF071DNPQQ3uITBUOf-IL0_uREOkPmC61fwMXeIrf86QnhPlIT0h8d4JuT157Kc84sEr_5OTWiITaqpRDbIE2Y4oZmelGRcpHYyL7

http://www.android100.org/html/201304/20/2237.html （设置链接点击跳转）

10.字体加粗

TextView tv = (TextView)findViewById(R.id.tv); 
TextPaint tp = tv.getPaint(); 
tp.setFakeBoldText(true); 

11.padding值设置无效

给TextView设置了padding值没有效果，原因是gravity是右对齐，paddingRight属性才会起作用。

12.去掉默认的留白

includeFontPadding=false