android - 我的应用程序在 AVD 上完美运行，但在真实设备上时，它不会将数据发送到我的 wampserver

Question

我正在学校的项目中开发订餐应用程序，并且大部分运行顺利。我将在下面上传的代码在 AVD 上完美运行，我可以在我的 wampserver 上可视化它，但是当在真实设备上使用相同的代码时，它无法发送数据。我将 IP 地址更改为本地 IP，但它给我一个指向该行的错误 输入流 IS = httpURLConnection.getInputStream();和公共(public)类BackgroundTask扩展AsyncTask

我将把代码上传到这里，希望有人能帮助我。

提前致谢

这是我的结账篮，我将数据发送到后台任务

@Override
protected void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.checkout_basket_layout);
    total_txt=(TextView)findViewById(R.id.total_txt);
    total=(TextView)findViewById(R.id.total);
    paypal=(ImageView)findViewById(R.id.paypal_btn);
    paypal.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getBaseContext(), "FUNCTION DISABLED", Toast.LENGTH_LONG).show();
        }
    });

    cancel = (Button)findViewById(R.id.cancel_order);
    basket_menu=(Button)findViewById(R.id.menu_basket);
    promocode=(Button)findViewById(R.id.promocode_btn);
    enter_code=(EditText)findViewById(R.id.enter_code);

   //List View
    listView = (ListView) findViewById(R.id.checkout_list);
    checkoutAdapter = new CheckoutAdapter(getApplicationContext(),R.layout.checkout_row_layout);
    checkoutAdapter.notifyDataSetChanged();
    listView.setAdapter(checkoutAdapter);
    databaseOperations = new DatabaseOperations(getApplicationContext());
    sqLiteDatabase = databaseOperations.getReadableDatabase();
    cursor = databaseOperations.getInformation(sqLiteDatabase);
    if (cursor.moveToFirst())
    {
        do{
            String order, combo, juice;
            String pricetxt;
            Long price;


            order = cursor.getString(0);
            combo = cursor.getString(1);
            juice=cursor.getString(2);
            price= cursor.getLong(3);
            BigDecimal price2= new BigDecimal(price);
            BigDecimal price1;
            BigDecimal cents = new BigDecimal(100);
            price1= price2.divide(cents);
            price1.setScale(2, BigDecimal.ROUND_CEILING);
            pricetxt= price1.toString();

            CheckoutDataProvider dataProvider = new CheckoutDataProvider(order, combo, pricetxt, juice);
            checkoutAdapter.add(dataProvider);
        }
        while (cursor.moveToNext());
    }

    cur = databaseOperations.getTotal(sqLiteDatabase);

    if(cur.moveToFirst())
    {
        do
        {
            Long total1;
            String total_bill;
            total1=cur.getLong(0);
            BigDecimal total2= new BigDecimal(total1);
            BigDecimal total3;
            BigDecimal cents = new BigDecimal(100);
            total3= total2.divide(cents);
            total3.setScale(2, BigDecimal.ROUND_CEILING);
            total_bill=total3.toString();

            total.setText(total_bill);
        }

        while (cur.moveToNext());

    }


}
public void back_menu (View view)
{

    Intent intent=new Intent(CheckoutBasket.this,MainActivity.class);
    startActivity(intent);
}

public void cancel_order (View view)
{

    SQLiteDatabase sdb = databaseOperations.getWritableDatabase();
    sdb.delete(OrderData.OrderInfo.TABLE_NAME, null, null);
    sdb.execSQL("delete from " + OrderData.OrderInfo.TABLE_NAME);
    sdb.close();
    checkoutAdapter.notifyDataSetChanged();
    Intent intent=new Intent(CheckoutBasket.this,MainActivity.class);
    startActivity(intent);



}

public void use_promocode (View view)
{
    databaseOperations = new DatabaseOperations(getApplicationContext());
    sqLiteDatabase = databaseOperations.getReadableDatabase();
    cursor = databaseOperations.getInformation(sqLiteDatabase);
    if (cursor.moveToFirst())
    {
        do{
            String order, combo, juice;
            String pricetxt;
            Long price;


            order = cursor.getString(0);
            combo = cursor.getString(1);
            juice=cursor.getString(2);
            price= cursor.getLong(3);
            BigDecimal price2= new BigDecimal(price);
            BigDecimal price1;
            BigDecimal cents = new BigDecimal(100);
            price1= price2.divide(cents);
            price1.setScale(2, BigDecimal.ROUND_CEILING);
            pricetxt= price1.toString();

            String method = "register";
            BackgroundTask backgroundTask=new BackgroundTask(this);
            backgroundTask.execute(method,order,combo,juice,pricetxt);


        }
        while (cursor.moveToNext());
    }



}

下一个代码是我的后台任务

public class BackgroundTask extends AsyncTask<String, Void, String> {
Context ctx;

BackgroundTask(Context ctx)
{
    this.ctx=ctx;
}

@Override
protected void onPreExecute() {
    super.onPreExecute();

}

@Override
protected String doInBackground(String... params) {
    String reg_url = "http://39.109.153.156/order/register.php";
    String method = params [0];


    if (method.equals("register"))
    {
        String order = params[1];
        String combo =params[2];
        String juice = params[3];
        String pricetxt = params [4];

        try {
            URL url = new URL(reg_url);
            HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
            httpURLConnection.setRequestMethod("POST");
            httpURLConnection.setDoOutput(true);
            Log.d("URLConnection", "Connection created");
            OutputStream OS = httpURLConnection.getOutputStream();
            BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(OS, "UTF-8"));
       String data = URLEncoder.encode("main","UTF-8") +"="+URLEncoder.encode(order,"UTF-8")+"&"+
               URLEncoder.encode("combo","UTF-8") +"="+URLEncoder.encode(combo,"UTF-8")+"&"+
               URLEncoder.encode("juice","UTF-8") +"="+URLEncoder.encode(juice,"UTF-8")+"&"+
               URLEncoder.encode("pricetxt","UTF-8") +"="+URLEncoder.encode(pricetxt,"UTF-8");
            bufferedWriter.write(data);
            bufferedWriter.flush();
            bufferedWriter.close();
            Log.d("BufferedWriter", "Writer created");
            OS.close();
            InputStream IS = httpURLConnection.getInputStream();
            IS.close();
            return "Transaction Successful";
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }


    return null;
}

@Override
protected void onProgressUpdate(Void... values) {
    super.onProgressUpdate(values);
}

@Override
protected void onPostExecute(String result)
{
    Toast.makeText(ctx, result, Toast.LENGTH_SHORT).show();
}

}

如果我没有使用正确的工具来做到这一点，有人可以帮我指出我可以遵循的方法吗？

感谢大家

Answer 1

要使其正常工作，您需要让计算机和设备使用相同的网络(例如相同的 Wi-Fi)。如果他们使用相同的网络 (wi-fi)，则使用无线 LAN ipv4 地址作为您的基本 URL。例如http://192.168.44.77/project