Question

当我尝试将某些内容保存到mlab上托管的mongoDB数据库中时，我的应用程序停止了。奇怪的是它没有错误地停止了，只是退出结束就带我回到了主屏幕。

我已经创建了一个类（仅带有setter和getter），用于创建稍后将保存在数据库中的对象。这些对象是在用户可以输入其数据的屏幕上创建和保存的。

//performing network call in background thread.   
    final class MongoLabSaveOrder extends AsyncTask<Object, Void,            Boolean> {
    @SuppressLint("LongLogTag")
    @Override
    protected Boolean doInBackground(Object... params) {
        Myorders order = (Myorders) params[0];
        Log.d("order", ""+order);

        try {
            SupportData sd = new SupportData();
            URL url = new URL(sd.buildOrdersSaveURL());

            HttpURLConnection connection = (HttpURLConnection) url
                    .openConnection();
            connection.setRequestMethod("PUT");
            connection.setDoOutput(true);
            connection.setRequestProperty("Content-Type",
                    "application/json");
            connection.setRequestProperty("Accept", "application/json");

            OutputStreamWriter osw = new OutputStreamWriter(
                    connection.getOutputStream());

            osw.write(sd.createContact(order));
            osw.flush();
            osw.close();

            if(connection.getResponseCode() <205)
            {
                return true;
            }
            else
            {
                return false;
            }

        } catch (Exception e) {
            e.getMessage();
            Log.d("Got error", e.getMessage());
            return false;
        }
    }
}
//the code from the onCreate() method
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.calclay1);
    Log.d(TAG, "onCreate: Starting.");
    if (android.os.Build.VERSION.SDK_INT > 9)
    {
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
    }
Button btnNext2 = (Button) findViewById(R.id.NextBtn);
    btnNext2.setOnClickListener(new View.OnClickListener() {



@Override
        public void onClick(View v) {
            Log.d(TAG, "onClick: pressed button to go on page 3");
            Myorders order=new Myorders();
            EditText expedStreet=(EditText) findViewById(R.id.expedTextView);
            EditText destStreet=(EditText) findViewById(R.id.destTextView);
            Spinner sizespinner=(Spinner) findViewById(R.id.sizespin);
            Spinner weightspinner=(Spinner) findViewById(R.id.weightspin);
            RadioButton Express=(RadioButton) findViewById(R.id.radioButton3);
            RadioButton Normal=(RadioButton)findViewById(R.id.radioButton4);
            CheckBox Fragile=(CheckBox)findViewById(R.id.FragileCheck);

            order.setSender_street(expedStreet.getText().toString());
            order.setDest_street(destStreet.getText().toString());
            order.setSizeP(sizespinner.getSelectedItem().toString());
            order.setWeightP(weightspinner.getSelectedItem().toString());
            if(Express.isChecked()) order.setExpr_Norm("Express");
            else order.setExpr_Norm("Normal");
            if(Fragile.isChecked()) order.setFragile("Yes");
            else order.setFragile("Not");
            //.........................
            order.setSender_name("rares");
            order.setDest_name("taciu");
            order.setPhone_number("0899765568");
            order.setEmail("taciu@gggg");
            order.setDateP("2019");
            order.setHour_P("09:29");
            order.setSpecifications("delivered package");

            MongoLabSaveOrder tsk=new MongoLabSaveOrder();
            tsk.execute(order);
            Toast.makeText(SecondScreen.this, "Saved to MongoDB!!", Toast.LENGTH_SHORT).show();

            Intent intent = new Intent(SecondScreen.this, ThirdScreen.class);
                startActivity(intent);

按下此nxt按钮应读取微调器，EditText字段等的所有输入，并基于它们创建一个对象。该对象的值应保存在mlab的数据库中。一些字段应该在下一步中完成，但是我的应用程序不会转到下一步，因此我只给了他们一些值。

当我尝试将某些内容从mlab保存到MongoDB数据库中时，我的应用程序停止

0 个答案: