Activity 跳转 fragment

ResumeTwoActivity.class

@Overridepublic void onClick(View view) {switch (view.getId()){case R.id.resumetwo_back:Intent intent1=new Intent();intent1.setClass(ResumeTwoActivity.this, MainActivity.class);intent1.putExtra("id",2);startActivity(intent1);break;

MainActivity.class

@Overridepublic void onResume() {int id = MainActivity.this.getIntent().getIntExtra("id", 0);if(id==2){main_viewpager.setCurrentItem(2);}super.onResume();}