<!-- 使用默认的sans字体-->
<TextView
  android:id="@+id/sans"
  android:text="Hello,World"
  android:textSize="20sp"
  android:typeface="sans" />

<!-- 使用默认的serifs字体-->
<TextView
  android:id="@+id/serif"
  android:text="Hello,World"
  android:textSize="20sp"
  android:typeface="serif" />

<!-- 使用默认的monospace字体-->
<TextView
  android:id="@+id/monospace"
  android:text="Hello,World"
  android:textSize="20sp"
  android:typeface="monospace" />

//获取textView实例
TextView textView = findViewById(R.id.textview);

 //设置serif字体
 textView.setTypeface(Typeface.SERIF);
 //设置sans字体
 textView.setTypeface(Typeface.SANS_SERIF);
 //设置monospace字体
 textView.setTypeface(Typeface.MONOSPACE);

//实例化TextView
TextView textView = findViewById(R.id.textview);

//得到AssetManager
AssetManager mgr=getAssets();

//根据路径得到Typeface
Typeface tf=Typeface.createFromAsset(mgr, "fonts/pocknum.ttf");

//设置字体
textView.setTypeface(tf);

TextPaint paint = outlineTextView.getPaint（）; //实例化TextPaint对象
paint.setStrokeWidth（15）; //设置描边的宽度
paint.setStyle（Paint.Style.STROKE）;//设置画笔属性为描边
strokeTextView.setTextColor（Color.parseColor（“＃000000”））; //设置描边的颜色（不能与文本颜色一致）

public class StrokeTextView extends TextView { 
  private TextView outlineTextView = null; 
  
  public StrokeTextView(Context context) { 
    super(context); 
   
    outlineTextView = new TextView(context); 
    init(); 
  } 

  public StrokeTextView(Context context, AttributeSet attrs) { 
    super(context, attrs); 
   
    outlineTextView = new TextView(context, attrs); 
    init(); 
  } 

  public StrokeTextView(Context context, AttributeSet attrs, int defStyle) { 
    super(context, attrs, defStyle); 
   
    outlineTextView = new TextView(context, attrs, defStyle); 
    init(); 
  } 

  public void init() { 
    TextPaint paint = outlineTextView.getPaint(); 
    paint.setStrokeWidth(3); //描边宽度 
    paint.setStyle(Style.STROKE); 
    outlineTextView.setTextColor(Color.parseColor("#000000")); //描边颜色 
    outlineTextView.setGravity(getGravity()); 
  } 

  @Override 
  public void setLayoutParams (ViewGroup.LayoutParams params) { 
    super.setLayoutParams(params); 
    outlineTextView.setLayoutParams(params); 
  } 

  @Override 
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
    super.onMeasure(widthMeasureSpec, heightMeasureSpec); 
   
    //设置轮廓文字 
    CharSequence outlineText = outlineTextView.getText(); 
    if (outlineText == null || !outlineText.equals(this.getText())) { 
      outlineTextView.setText(getText()); 
      postInvalidate(); 
    } 
    outlineTextView.measure(widthMeasureSpec, heightMeasureSpec); 
  } 

  @Override 
  protected void onLayout (boolean changed, int left, int top, int right, int bottom) { 
    super.onLayout(changed, left, top, right, bottom); 
    outlineTextView.layout(left, top, right, bottom); 
  } 

  @Override 
  protected void onDraw(Canvas canvas) { 
    outlineTextView.draw(canvas); 
    super.onDraw(canvas); 
  } 
} 

public class StrokeTextView extends TextView {

  private TextView outlineTextView = null;
  private TextPaint strokePaint;

  public StrokeTextView(Context context) {
    super(context);

    outlineTextView = new TextView(context);
  }

  public StrokeTextView(Context context, AttributeSet attrs) {
    super(context, attrs);

    outlineTextView = new TextView(context, attrs);
  }

  public StrokeTextView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

    outlineTextView = new TextView(context, attrs, defStyle);
  }

  @Override
  public void setLayoutParams (ViewGroup.LayoutParams params) {
    super.setLayoutParams(params);
    outlineTextView.setLayoutParams(params);
  }

  @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);

    AssetManager manager = context.getAssets();
    String path = "fonts/new_text.ttf";
    Typeface type = Typeface.createFromAsset(manager, path);

    //设置轮廓文字
    CharSequence outlineText = outlineTextView.getText();
    if (outlineText == null || !outlineText.equals(this.getText())) {
      outlineTextView.setText(getText());
      outlineTextView.setTypeface(type);
      setTypeface(type);
      postInvalidate();
    }
    outlineTextView.measure(widthMeasureSpec, heightMeasureSpec);
  }

  @Override
  protected void onLayout (boolean changed, int left, int top, int right, int bottom) {
    super.onLayout(changed, left, top, right, bottom);
    outlineTextView.layout(left, top, right, bottom);
  }

  @Override
  protected void onDraw(Canvas canvas) {
    AssetManager manager = context.getAssets();
    String path = "fonts/new_text.ttf";
    Typeface type = Typeface.createFromAsset(manager, path);

    if (strokePaint == null) {
      strokePaint = new TextPaint();
    }
    //复制原来TextViewg画笔中的一些参数
    TextPaint paint = getPaint();
    strokePaint.setTextSize(paint.getTextSize());
    strokePaint.setTypeface(type);
    strokePaint.setFlags(paint.getFlags());
    strokePaint.setAlpha(paint.getAlpha());

    //自定义描边效果
    strokePaint.setStyle(Paint.Style.STROKE);
    strokePaint.setColor(Color.parseColor("#000000"));
    strokePaint.setStrokeWidth(4);

    String text = getText().toString();

    //在文本底层画出带描边的文本
    canvas.drawText(text, (getWidth() - strokePaint.measureText(text)) / 2,
        getBaseline(), strokePaint);
    super.onDraw(canvas);
  }
}