Android+Fragment与Activity之间的信息传递——笔记3

通过Bundle ，Fragment与Activity之间的信息传递

 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        btn2=findViewById(R.id.btn2);
        btn3=findViewById(R.id.btn3);
        btn2.setOnClickListener(this);
        btn3.setOnClickListener(this);
    }
    //fragment与Activity之间通过Bundle传递数据
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.btn2:
                Bundle bundle=new Bundle();
                bundle.putString("name","张三");
                BlankFragment1 f1=new BlankFragment1();
                f1.setArguments(bundle);
                replacefragment(f1);
                break
                ;
            case R.id.btn3:
                replacefragment(new BlankFragment2());
                break;
        }
    }
 public void replacefragment(Fragment v){
        FragmentManager fragmentManager=getSupportFragmentManager();
        FragmentTransaction fragmentTransaction=fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.fragment1,v);//替换
        fragmentTransaction.addToBackStack(null);//添加到后退栈
        fragmentTransaction.commit();//提交事务
    }