Android设置ToolBar的title文字居中显示

private void setToolBarCenterTitle() {
  TextView titleTv = new TextView(this);
  titleTv.setTextColor(ContextCompat.getColor(this, R.color.black));
  titleTv.setText("Title居中显示");
  titleTv.setTextSize(20);
  titleTv.setGravity(Gravity.CENTER);
  titleTv.getPaint().setFakeBoldText(true);
  Toolbar.LayoutParams layoutParams = new Toolbar.LayoutParams(Toolbar.LayoutParams.WRAP_CONTENT,
      Toolbar.LayoutParams.WRAP_CONTENT);
  layoutParams.gravity = Gravity.CENTER;
  titleTv.setLayoutParams(layoutParams);
  Toolbar toolbar = findViewById(R.id.toolbar);
  toolbar.addView(titleTv);
}