Question

我目前在同一活动中托管了两个片段。我想将字符串变量从片段1传递到片段2。我尝试使用bundle，但仅获得空值。

片段1代码：

public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.customer_one,container,false);
    edemail = v.findViewById(R.id.ed_email);
    btn = v.findViewById(R.id.btn_next);
    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            email = edemail.getText().toString().trim();
            Customer_Frag2 cf2 = new Customer_Frag2();
            Bundle data = new Bundle();
            data.putString("Email",email);
            cf2.setArguments(data);
            FragmentTransaction ft = getFragmentManager().beginTransaction();
            ft.replace(R.id.layout_one,cf2);
            ft.addToBackStack(null);
            ft.commit();
        }
    });
    return v;
}

片段2代码：

public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.customer_two,container,false);
    tc = v.findViewById(R.id.txt);
    Bundle args = getArguments();
    if(args != null){
        String myvalue = args.getString("Email");
        tc.setText(myvalue);
    }
    return v;
}

除了使用bundle，我还尝试使用interface，但是无法从片段1获取字符串。

Answer 1

在fragment2中执行以下操作：

    private String myvalue  = "";

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         Bundle args = getArguments();
         if(args != null){
             myvalue = args.getString("Email");

         }
    }

   public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.customer_two,container,false);
        tc = v.findViewById(R.id.txt);
        tc.setText(myvalue);

        return v;
}

希望这会对您有所帮助。

将变量从一个片段传递到另一个片段

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