Question

我最近开始使用Android开发平台。我正在使用Android Studio，并使用Volley库进行网络操作。我已经实现了iOS的推送通知的后端，它运行得很好，现在我通过Volley网络操作触发这个php，如下所示。

由于某些原因，它多次调用该URL（5或6次），我怎么知道？因为iOS设备收到多个通知。我不确定为什么会这样，我怎么能解决它？

public void onClick(View v) {
        if(v == buttonBuy) {
            message = (EditText) findViewById(R.id.offerText);
            buy();
        }
}

private void buy()
 {
     StringRequest postRequest = new StringRequest(Request.Method.POST, Config.ASK_URL,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        try {
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        error.printStackTrace();
                    }
                }
        ) {
            @Override
            protected Map<String, String> getParams()
            {
                Map<String, String>  params = new HashMap<>();
                params.put("token",token);
                params.put("pname",objee.optString("pname"));
                params.put("toid",objee.optString("uid"));
                params.put("pid",pid);
                params.put("message",message.getText().toString().trim());
                return params;
            }
        };

        CustomVolleyRequest.getInstance(this).getRequestQueue().add(postRequest);
}

Answer 1

尝试添加以下代码：

   Compiling study_rust v0.0.1 (main.rs)
src/main.rs:45:17: 45:19 error: borrowed value does not live long enough
src/main.rs:45     myFunctor= &fx ;
                               ^~
src/main.rs:44:36: 47:2 note: reference must be valid for the block suffix following statement 0 at 44:35...
src/main.rs:44     let myFunctor: &Fn(i32) -> i32;
src/main.rs:45     myFunctor= &fx ;
src/main.rs:46
src/main.rs:47 }
src/main.rs:45:5: 45:21 note: ...but borrowed value is only valid for the statement at 45:4
src/main.rs:45     myFunctor= &fx ;
                   ^~~~~~~~~~~~~~~~
src/main.rs:45:5: 45:21 help: consider using a `let` binding to increase its lifetime
src/main.rs:45     myFunctor= &fx ;
                   ^~~~~~~~~~~~~~~~
error: aborting due to previous error
Could not compile `study_rust`.

排球请求多次呼叫URL

1 个答案: