Question

我正在创建一个应用程序，其中有不同的付款模式，所以对于卡支付和支票付款，我创建了两个不同的活动，我从中获取用户的详细信息并将数据保存到共享的首选项，然后应用程序返回到其他细节也在那里的活动然后用户可以在点击按钮上保存数据。这些数据被保存到Sqlite数据库中。我的问题是，当我选择卡支付时，它正确存储，但同样的值也存储在检查否以及sqlite数据库中。默认情况下，卡支付的价值被复制到检查没有列。

下面是我的信用卡付款活动代码：

public class CardNo extends Activity {

String bankname;
String cardno;
int chq;
TextView textView1, textView2;
EditText editText1, editText2;
Button btn;


@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.creditdebit);

    textView1 = (TextView) findViewById(R.id.tv1);
    textView2 = (TextView) findViewById(R.id.tv2);
    editText1 = (EditText) findViewById(R.id.bankname);
    editText2 = (EditText) findViewById(R.id.cardno);
    btn = (Button) findViewById(R.id.btn1);
    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            saveData();

            Intent card = new Intent(CardNo.this, EnterAmount.class);
            startActivity(card);
            finish();
        }
    });

}

private void saveData() {

    bankname = editText1.getText().toString();
    cardno = editText2.getText().toString();


    SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.putString("Bank Name", bankname);
    editor.putString("Card No", cardno);
    editor.apply();


}
}

现在支票付款活动代码：

     public class Cheque extends Activity  {
String bankname1;
String chequeno;
int chq;
TextView textView1,textView2;
EditText editText1,editText2;
Button btn;

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.cheque);


    textView1=(TextView)findViewById(R.id.tv11);
    textView2=(TextView)findViewById(R.id.tv12);
    editText1=(EditText)findViewById(R.id.bankname1);
    editText2=(EditText)findViewById(R.id.chequeno);
    btn=(Button)findViewById(R.id.btn11);
    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            saveData();

            Intent cheque = new Intent(Cheque.this, EnterAmount.class);

            startActivity(cheque);
            finish();

        }
    });

}

private void saveData() {

    bankname1 = editText1.getText().toString();
    chequeno = editText2.getText().toString();


    SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.putString("Bank Name", bankname1);
    editor.putString("Cheque No", chequeno);
    editor.apply();

}
}

现在是我从共享首选项中检索数据并将数据存储到sqlite中的活动代码。

     public class EnterAmount extends Activity implements OnClickListener {
    Intent intent;
    Button save;
    Spinner spinnerPayment, spinnerCategory;
    EditText etamt, etbdgt, et_get_other;
    String date, sBdgt, budget, bankname, cardno, chequeno;
    String sAmt;
    String spinnerItemSelectedPayment;
    String spinnerItemSelectedCategory;
    // String category;
    int amt;
    int date2;
    TextView caategories, tv_cat;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.enteramount);

            save = (Button) findViewById(R.id.bsaveDb);
            caategories = (TextView) findViewById(R.id.tvCaategories);
            etamt = (EditText) findViewById(R.id.etAmount);
            etbdgt = (EditText) findViewById(R.id.etbudget);

            spinnerCategory = (Spinner) findViewById(R.id.spinnerCategory);

            spinnerPayment = (Spinner) findViewById(R.id.payment_spinner);

            List<String> sCategory = new ArrayList<String>();
            String[] categories = {"Food", "Bills",
                    "Travel", "Entertainment", "Office Stationary",
                    "Medical Expenses", "Fuel"
            };

            sCategory.add("Food");
            sCategory.add("Office Stationary");
            sCategory.add("Bills");
            sCategory.add("Travel");
            sCategory.add("Entertainment");
            sCategory.add("Medical Expenses");
            sCategory.add("Fuel");

            ArrayAdapter<String> sc = new ArrayAdapter<String>(this,
                    android.R.layout.simple_spinner_dropdown_item, sCategory);
            spinnerCategory.setAdapter(sc);


            List<String> l = new ArrayList<String>();
            String[] paymentMode = {"Cash", "Credit/Debit Card", "Cheque", "NetBanking"};
            l.add("Cash");
            l.add("Credit/Debit Card");
            l.add("Cheque");
            l.add("NetBanking");
            ArrayAdapter<String> sp = new ArrayAdapter<String>(this,
                    android.R.layout.simple_spinner_dropdown_item, l);
            spinnerPayment.setAdapter(sp);

            save.setOnClickListener(this);


            spinnerCategory.setOnItemSelectedListener(new OnItemSelectedListener() {

                public void onItemSelected(AdapterView<?> parent,
                                           View selectedItemView, int pos, long id) {
                    spinnerItemSelectedCategory = parent.getItemAtPosition(pos)
                            .toString();



                }

                public void onNothingSelected(AdapterView<?> parentView) {
                    spinnerItemSelectedCategory = "Food";
                }
            });

            spinnerPayment.setOnItemSelectedListener(new OnItemSelectedListener() {

                public void onItemSelected(AdapterView<?> parent,
                                           View selectedItemView, int pos, long id) {
                    spinnerItemSelectedPayment = parent.getItemAtPosition(pos).toString();

                    if (spinnerItemSelectedPayment.equals("Cheque")) {
                        Intent cheque = new Intent(EnterAmount.this, Cheque.class);
                        cheque.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                        startActivity(cheque);


                    } else if (spinnerItemSelectedPayment.equals("Credit/Debit Card")) {

                        Intent card = new Intent(EnterAmount.this, CardNo.class);
                        card.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                        startActivity(card);


                    }
                }

                public void onNothingSelected(AdapterView<?> parentView) {
                    spinnerItemSelectedPayment = "Cash";

                }
            });


            final Calendar c = Calendar.getInstance();

            SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yy-HH:mm:ss ");

            date = sdf.format(c.getTime());


            int yy = c.get(Calendar.YEAR);
            int mm = c.get(Calendar.MONTH) + 1;
            int dd = c.get(Calendar.DAY_OF_MONTH);

            String s = yy + "" + (mm < 10 ? ("0" + mm) : (mm)) + ""
                    + (dd < 10 ? ("0" + dd) : (dd));

            Log.e("datechange", s);

            date2 = Integer.parseInt(s);
            Log.e("integer2", "hello" + date2);

        }


        @Override
        public void onBackPressed () {

            super.onBackPressed();
            finish();

        }

    private void vibrate(int ms) {
        ((Vibrator) getSystemService(Context.VIBRATOR_SERVICE)).vibrate(ms);
    }


    private void loadSavedPreferences() {

        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);

        budget = sharedPreferences.getString("Budget", " ");

getSharedPreferences(mypreference,Context.MODE_PRIVATE);
        bankname = sharedPreferences.getString("Bank Name", "Not Applicable");
        cardno = sharedPreferences.getString("Card No", "Not Applicable");
        chequeno = sharedPreferences.getString("Cheque No", "Not Applicable");


    }

    private void removeSavedPreferences() {

        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
        SharedPreferences.Editor editor = sharedPreferences.edit();
        editor.remove("Bank Name");
        editor.remove("Cheque No");
        editor.remove("Card No");
        editor.apply();
    }

    private void savePreferences(String key, String value) {

        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
        Editor editor = sharedPreferences.edit();
        editor.putString(key, value);
        editor.commit();


    }


    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.bsaveDb: {

                savePreferences("Budget", etbdgt.getText().toString());
                loadSavedPreferences();



                sAmt = etamt.getText().toString();


                Log.e("category", "Hello" + sAmt);
                try {
                    amt = Integer.parseInt(sAmt);
                    Log.e("amt is", "" + amt);

                } catch (Exception e) {


                }


                DbClass dc = new DbClass(this);
                dc.open();

                if (amt == 0) {

                    Toast.makeText(getApplicationContext(),
                            "Please insert the amount", Toast.LENGTH_SHORT).show();
                } else {


                    dc.categoryDetailsInsert(amt, spinnerItemSelectedCategory, date, spinnerItemSelectedPayment, date2, bankname, cardno, chequeno);
                    dc.close();
                    Toast.makeText(getApplicationContext(), "Saved successfully",
                            Toast.LENGTH_LONG).show();
                    amt = 0;
                    etamt.setText("");
                    etbdgt.setText(budget);
                    removeSavedPreferences();


                }

                break;

            }
        }
    }
     }

我正在附上sqlite数据库的屏幕截图，你可以看到银行名称正确存储，但是cardno和check no在付款方面总是相同。Screenshot Of Database

Answer 1

将您的密钥附加到上下文标记以防止覆盖值。喜欢： String TAG =＆＃34; ContextName或ActivityName＆＃34 ;;

然后保存：

pref.put（TAG + key，＆＃34; value＆＃34;）;

Answer 2

实际上上面的代码很好问题出现在我从数据库中检索代码的代码中，我为两个不同的列插入了相同的索引号。所以我的支票号码和借记卡号码的值相同。

在共享首选项中获取两个不同键的相同值

2 个答案: