如何从 android 中的片段开始一个 activity？

Question

我想要一个 activity 并在单击片段按钮将 activity 更改为第二个 activity

时使用片段

示例：在登录中 activity 我单击注册...如果创建用户更改 activity 为主并完成登录 activity...

这是我的片段代码：

        View view = inflater.inflate(R.layout.fragment_register, container, false);
    edUsername = view.findViewById(R.id.edUser);
    edUserEmail = view.findViewById(R.id.edEmail);
    edUserPhone = view.findViewById(R.id.edPass);
    edUserPassword = view.findViewById(R.id.edPassword);
    btnLogin = view.findViewById(R.id.btnLogin);
    btnRegister = view.findViewById(R.id.btnRegister);

    btnRegister.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            final ProgressDialog loader = ProgressDialog.show(getContext(),
                    "Inserting...", "please wait",
                    false, false);


            StringRequest request = new StringRequest(Request.Method.POST, Config.register_api,
                    new Response.Listener<String>() {
                        @Override
                        public void onResponse(String response) {
                            if (response.equals("a user with same information existing")) {
                                loader.dismiss();
                                Toast.makeText(getContext(), response, Toast.LENGTH_SHORT).show();
                            }else {
                                loader.dismiss();
                                Toast.makeText(getContext(), response, Toast.LENGTH_SHORT).show();
                            }
                        }
                    }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Toast.makeText(getContext(), error.toString(), Toast.LENGTH_SHORT).show();
                    loader.dismiss();
                }
            }) {
                @Override
                protected Map<String, String> getParams() {
                    Map<String, String> params = new HashMap<>();
                    params.put("username", edUsername.getText().toString().trim());
                    params.put("userphone", edUserPhone.getText().toString().trim());
                    params.put("useremail", edUserEmail.getText().toString().trim());
                    params.put("userpassword", edUserPassword.getText().toString().trim());

                    return params;
                }
            };

            RequestQueue requestQueue = Volley.newRequestQueue(getContext());
            requestQueue.add(request);
        }
    });

    btnLogin.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            
        }
    });
    return view;

Answer 1

如果您想从 Fragment 开始新的 Activity，您可以使用：

Intent intent = new Intent(getActivity(), NewActivity.class); // creating new intent
startActivity(); // starting new activity with intent
getActivity().finish(); // finish current activity

只需将此插入到您要开始新的代码的位置 activity。

如果你想从另一个 Activity 开始新的 Activity 使用这个：

Intent intent = new Intent(CurrentActivity.this, NewActivity.class);
startActivity();
finish();

如何从 android 中的片段开始一个 activity？

How to start an activity from fragment in android?

java

android

android-fragments

android-volley