Toolbar title居中

先看效果

核心代碼

Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
toolbar.setTitleMarginStart(getTitleMarginStart());

private int getTitleMarginStart() {
    //獲取到屏幕的寬度
    Point point = new Point();
    WindowManager wm = (WindowManager) getSystemService(Context.WINDOW_SERVICE);
    wm.getDefaultDisplay().getSize(point);
    int width = point.x;

    Paint paint = new TextPaint();
    float textWidth = paint.measureText(getSupportActionBar().getTitle().toString());
    float f = (width - textWidth) / 2 - 260;//1080分辨率下正常
    return (int) f;
}