小编Vik*_*rav的帖子

我尝试登录我的应用程序,当我尝试使用volley库调用API时,它会给出com.android.volley.ServerError和响应代码400.

final String username = editTextUsername.getText().toString().trim();
        final String password =   editTextPassword.getText().toString().trim();
        final String email = editTextEmail.getText().toString().trim();

  StringRequest stringRequest = new StringRequest(Request.Method.POST, REGISTER_URL,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        Toast.makeText(MainActivity.this,response,Toast.LENGTH_LONG).show();
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        Toast.makeText(MainActivity.this,error.toString(),Toast.LENGTH_LONG).show();
                    }
                }){
            @Override
            protected Map<String,String> getParams(){
                Map<String,String> params = new HashMap<String, String>();
                params.put(KEY_USERNAME,username);
                params.put(KEY_PASSWORD,password);`enter code here`
                params.put(KEY_EMAIL, email);
                return params;
            }

        };

        RequestQueue requestQueue = Volley.newRequestQueue(this);
        requestQueue.add(stringRequest);
    }    

我看到了很多例子,但我没有得到任何解决方案.