android中从activity跳转到指定fragment

先跳转到fragement所在的activity,在根据情况判断该显示哪个fragment

Intent intent = new Intent(this,MainActivity.class);

intent.putExtra("id", 1);

startActivity(intent);

//singleInstance模式,返回时选择fragment的显示

protected void onRestart() { Log.e("zz","onRestart");

int id= getIntent().getIntExtra("id", 0);

if（id==1）{

addFragment(my_f);       showFragment(my_f); } super.onRestart(); }