Usage Title

//设置标题
this.getCustomActionBar().setTitle("Home");
//设置标题居中对其
this.getCustomActionBar().setTitleGravity(Gravity.CENTER);
//这是标题显示
this.getCustomActionBar().setTitleVisibility(View.VISIBLE);
//设置标题点击事件
this.getCustomActionBar().setOnTitleClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        Toast.makeText(MainActivity.this,"Click Title", Toast.LENGTH_SHORT).show();
    }
});