android - Request Volley，数据有时收到有时没有

Question

我正在尝试使用 Volley android 库发出请求，但有时我会收到数据，有时会失败，我做错了什么吗？

这是我用来发出请求的代码

StringRequest strReq = new StringRequest(Request.Method.POST,
            Config.EDIT_KERANJANG_URL, new Response.Listener<String>() {

        @Override
        public void onResponse(String response) {
            Log.d(TAG, " Response: " + response.toString());

            try {
                JSONObject jsonObject = new JSONObject(response);
                Config.SUCCESS = jsonObject.getString("success");

                Log.e("error", "nilai sukses=" + Config.SUCCESS);

                if (Config.SUCCESS.equals("1")) {

                    SharedPreferences.Editor editor = getSharedPreferences("CODE_RESUME_EDITK", MODE_PRIVATE).edit();
                    editor.putString("code_resume_editk", "1");
                    editor.apply();
                    finish();

                }
                else {
                    Log.e("error", "tidak bisa ambil data 0");
                }

            } catch (Exception e) {
                // TODO: handle exception
                Log.e("error", "tidak bisa ambil data 1");
                Toast.makeText(KeranjangEditActivity.this, "Gagal menyimpan!", Toast.LENGTH_LONG).show();
            }
        }
    },

            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Log.e(TAG, "Login Error: " + error.getMessage());
                    Toast.makeText(KeranjangEditActivity.this,
                            "Gagal menyimpan!", Toast.LENGTH_LONG).show();
                }

            })

    {

        @Override
        protected Map<String, String> getParams() {
            // Posting parameters to login url
            Map<String, String> params = new HashMap<String, String>();
            params.put("id_pesanan", sidPesanan);
            params.put("quantity", sQuantity);
            params.put("harga", sHarga);

            return params;
        }

    };

这是我用来填充列表项的自定义适配器。

public class KeranjangAdapter extends BaseAdapter  {

public static final int TYPE = 2;
private Context context;
private String idUserH,idProdukH,idKeranjangH,idFileH;
private LayoutInflater inflater;
private List<KeranjangModel> keranjangModels = new ArrayList<KeranjangModel>();
private int grandTotal = 0;
SessionManager sessionManager;
NumberFormat rupiahFormat;

private ColorDrawable[] vibrantLightColorList =
        {
                new ColorDrawable(Color.parseColor("#ffeead")),
                new ColorDrawable(Color.parseColor("#93cfb3")),
                new ColorDrawable(Color.parseColor("#fd7a7a")),
                new ColorDrawable(Color.parseColor("#faca5f")),
                new ColorDrawable(Color.parseColor("#1ba798")),
                new ColorDrawable(Color.parseColor("#6aa9ae")),
                new ColorDrawable(Color.parseColor("#ffbf27")),
                new ColorDrawable(Color.parseColor("#d93947"))
        };

public ColorDrawable getRandomDrawbleColor() {
    int idx = new Random().nextInt(vibrantLightColorList.length);
    return vibrantLightColorList[idx];
}

public KeranjangAdapter(Context ctx, List<KeranjangModel> keranjangModels) {
    this.context = ctx;
    this.keranjangModels = keranjangModels;
}

public int getGrandTotal(){
    return grandTotal;
}

@Override
public int getCount() {
    return keranjangModels.size();
}

@Override
public Object getItem(int location) {
    return keranjangModels.get(location);
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(final int position, View convertView, ViewGroup parent) {

    sessionManager = new SessionManager(context);
    HashMap<String, String> user = sessionManager.getUserDetails();
    idUserH = user.get( SessionManager.KEY_ID );

    if (inflater == null)
        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    if (convertView == null)
        convertView = inflater.inflate(R.layout.activity_keranjang_list, null);

    View vv = inflater.inflate(R.layout.activity_keranjang, parent, false);
    final CheckBox checkBoxs = (CheckBox) vv.findViewById(R.id.checkAll);

    parent.setDescendantFocusability(ListView.FOCUS_BLOCK_DESCENDANTS);

    final ImageView thumbNail = (ImageView) convertView.findViewById(R.id.fotoProdukK);
    final TextView spOrder = (TextView) convertView.findViewById(R.id.textInfoK);
    final TextView hargaSatuan = (TextView) convertView.findViewById(R.id.hargaSatuanK);
    final TextView harga = (TextView) convertView.findViewById(R.id.textInfoHargaK);
    final TextView idKeranjang = (TextView) convertView.findViewById(R.id.idKeranjangK);
    final TextView idProduk = (TextView) convertView.findViewById(R.id.idProdukK);
    final TextView idFile = (TextView) convertView.findViewById(R.id.idFileK);
    final TextView quantity = (TextView) convertView.findViewById(R.id.jumOrderK);
    final ImageButton hapusK = (ImageButton) convertView.findViewById(R.id.hapusK);
    final ImageButton editK = (ImageButton) convertView.findViewById(R.id.editK);
    final TextView namaProduk = (TextView) convertView.findViewById(R.id.namaProdukK);
    final CheckBox checkBox = (CheckBox) convertView.findViewById(R.id.checkItem);

    final KeranjangModel m = keranjangModels.get(position);

    Picasso.with(context)
            .load(m.getFotoProdukK())
            .placeholder(getRandomDrawbleColor())
            .into(thumbNail);

    int qty = Integer.parseInt(String.valueOf(m.getQuantityK()));
    int harg = Integer.parseInt(String.valueOf(m.getHargaK()));
    int id = Integer.parseInt(String.valueOf(m.getIdKeranjangK()));
    int idp = Integer.parseInt(String.valueOf(m.getIdProdukK()));
    int idf = Integer.parseInt(String.valueOf(m.getIdFileK()));
    int hs = Integer.parseInt(String.valueOf(m.getHargaSatuanK()));

    rupiahFormat = NumberFormat.getInstance(Locale.GERMANY);
    String rupiah = rupiahFormat.format(harg);

    quantity.setText(String.valueOf(qty));
    spOrder.setText(m.getSpesifikasiOrderK());
    hargaSatuan.setText(String.valueOf(hs));
    harga.setText(rupiah);
    idKeranjang.setText(String.valueOf(id));
    idProduk.setText(String.valueOf(idp));
    idFile.setText(String.valueOf(idf));
    namaProduk.setText(m.getNamaProdukK());

    checkBox.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            checkBoxs.setChecked(false);
            Toast.makeText(context, "toas", Toast.LENGTH_SHORT).show();
        }
    });



    return convertView;
}

感谢任何帮助。

Answer 1

我想这是与超时有关的问题。您可以为您发送的请求设置 RetryPolicy。用这个

strReq.setRetryPolicy(new DefaultRetryPolicy(5000, 
                DefaultRetryPolicy.DEFAULT_MAX_RETRIES, 
                DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

我希望这能解决问题。