java - 将变量从 Android 客户端发布到 php 服务器时出错

Question

我想开展一项更改用户个人资料的 Activity 。接收到的基于 JSON 的部分工作正常。我已经在 PHP 代码中手动设置变量进行了测试。但是，当我将变量从 android 发布到 php 时，它无法接收它。谁能告诉我问题所在吗？

public class ProfilActivity extends AppCompatActivity {

private EditText editTextNama, editTextEmail, editTextPassword, editTextNohp;
private Button Simpan;
private static final String PROFIL_URL = "http://vrai-dev.000webhostapp.com/koneksi_profil.php";

List<Profil> profilList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_profil);

        Button back = (Button) findViewById(R.id.profil_back);
        back.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent i = new Intent(ProfilActivity.this, MenuActivity.class);
                startActivity(i);
            }
        });

        profilList = new ArrayList<>();

        getEmail();

        editTextNama = (EditText) findViewById(R.id.profil_username);
        editTextEmail = (EditText) findViewById(R.id.profil_email);
        editTextPassword = (EditText) findViewById(R.id.profil_password);
        editTextNohp = (EditText) findViewById(R.id.profil_nohp);

        Simpan = (Button) findViewById(R.id.profil_simpan);
        Simpan.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                try {
                    updateProfil();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        });

    }

    private void getEmail(){
        final String email = "a";
        StringRequest stringRequest = new StringRequest(Request.Method.POST, PROFIL_URL,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        loadProfil();
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                    }
                }){
            @Override
            protected Map<String, String> getParams() throws AuthFailureError {
            Map<String,String> params = new HashMap<>();
            params.put("email", email);
            return params;
            }
        };
        RequestQueue requestQueue = Volley.newRequestQueue(this);
        requestQueue.add(stringRequest);
    }

    private void loadProfil() {
        StringRequest stringRequest = new StringRequest(Request.Method.GET, PROFIL_URL, new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                try {
                    JSONArray profil = new JSONArray(response);

                    JSONObject profilObject = profil.getJSONObject(0);

                    String foto_user = profilObject.getString("foto_user");
                    String username = profilObject.getString("username");
                    String email = profilObject.getString("email");
                    String password = profilObject.getString("password");
                    String nohp = profilObject.getString("nohp");

                    Profil viewProfil = new Profil(foto_user, username, email, password, nohp);
                    profilList.add(viewProfil);

                    editTextNama.setText(username);
                    editTextEmail.setText(email);
                    editTextPassword.setText(password);
                    editTextNohp.setText(nohp);

                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Toast.makeText(ProfilActivity.this, error.getMessage() + "Error Load Profil", Toast.LENGTH_LONG).show();
            }
        });
        Volley.newRequestQueue(this).add(stringRequest);
    }

Answer 1

遇到同样的问题无法找出问题所在，但这有效，不要忘记在 gradle 文件中添加依赖项

        RequestQueue queue = Volley.newRequestQueue(getApplicationContext());

    StringRequest postRequest = new StringRequest(com.android.volley.Request.Method.POST, YOUR_URL,
            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    try {
                     // do work here
                    } catch (JSONException e) {
                        e.printStackTrace();
                        Log.d("Response", "failed: " + response);
                    }
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Log.d("Error.Response", error.toString());
                }
            }
    ) {
        @Override
        protected Map<String, String> getParams() {
            Map<String, String> params = new HashMap<String, String>();
            //add your parameters here as key-value pairs
            params.put("title", title);
            return params;
        }
    };
    queue.add(postRequest);

** 实现 'com.he5ed.lib:volley:android-cts-5.1_r4'**