Question

在经过各种可能的解决方法后，我问这个问题。

我有两个EditText定义如下

private EditText firstText;
private EditText secondText;

我正在重置另一个EditText的值，反之亦然。我得到一个stackOverFlow错误，因为递归调用EditText的原因相同。

因此，我跟着this link to solve my problem

幸运的是，事情可行，但仅适用于第二个文本而不适用于第一个文本。这意味着当我更改secondText的值时，我在firstText中看到更新的值。但同样不适用于firstText。

当我通过打印garbbish值尝试调试时，我知道firstText没有调用addTextChangedListener。

以下是我的EditText

的代码

 firstTextTW = new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            System.out.println("I am inside firstTextTW");
            int afterCount = firstText.getText().length();
            System.out.println(afterCount);
            if(afterCount == 1) {
                //if the character is null then do nothing

            }else{
                System.out.println("Inside firstTextTw");//debugging by printing
                Double number = Double.parseDouble(s.toString());
                String SetCurrency = actv.getText().toString();
                String SecondCurrency = actv2.getText().toString();

                SetCurrency = SetCurrency.trim();
                SecondCurrency = SecondCurrency.trim();

                SecondTask task = new SecondTask();
                try {
                    double CurrencyDiff;
                    CurrencyDiff = Double.parseDouble(task.execute("http://api.fixer.io/latest?base=" + SetCurrency + "&symbols=" + SetCurrency + "," + SecondCurrency).get());

                    Double final_result = number * CurrencyDiff;
                    Double final_value = Math.round(final_result * 1000.0) / 1000.0;
                    secondText.removeTextChangedListener(secondTextTW);
                    secondText.setText(final_value.toString());
                } catch (InterruptedException e) {
                    e.printStackTrace();
                } catch (ExecutionException e) {
                    e.printStackTrace();
                }
            }
        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    };

    secondTextTW = new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            Double number_to_be_divided_from = Double.parseDouble(s.toString());
            String auto1 = actv.getText().toString();
            String auto2 = actv2.getText().toString();

            auto1 = auto1.trim();
            auto2 = auto2.trim();

            SecondTask task = new SecondTask();
            Double currency_converter;

            try {
                currency_converter = Double.parseDouble(task.execute("http://api.fixer.io/latest?base=" + auto1 + "&symbols=" + auto1 + "," + auto2).get());
                System.out.println(currency_converter);
                Double resultToUpdate = number_to_be_divided_from / currency_converter;
                Double resultToUpdateFinal = Math.round(resultToUpdate * 1000.0) / 1000.0;
                //System.out.println(resultToUpdateFinal);
                firstText.removeTextChangedListener(firstTextTW);
                firstText.setText(resultToUpdateFinal.toString());
            } catch (InterruptedException e) {
                e.printStackTrace();
            } catch (ExecutionException e) {
                e.printStackTrace();
            }
        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    };

    firstText.addTextChangedListener(firstTextTW) ;
    secondText.addTextChangedListener(secondTextTW);

正如我可以看到我在EditText上调用addTextChangedListener，我甚至将firstTextTW和secondTextTW正确地定义为两个EditText下面的全局变量

提前致谢

用于num键盘的setOntouchListener的编码代码

firstText.setOnTouchListener(new View.OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            v.onTouchEvent(event);
            InputMethodManager imm = (InputMethodManager)v.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
            if (imm != null) {
                imm.hideSoftInputFromWindow(v.getWindowToken(), 0);

                nine.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        firstText.setText(firstText.getText().insert(firstText.getText().length(), "9"));
                    }
                });

                eight.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        firstText.setText(firstText.getText().insert(firstText.getText().length(), "8"));
                    }
                });

                seven.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        firstText.setText(firstText.getText().insert(firstText.getText().length(), "7"));
                    }
                });

                six.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        firstText.setText(firstText.getText().insert(firstText.getText().length(), "6"));
                    }
                });

                five.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        firstText.setText(firstText.getText().insert(firstText.getText().length(), "5"));
                    }
                });

                four.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        firstText.setText(firstText.getText().insert(firstText.getText().length(), "4"));
                    }
                });

                three.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        firstText.setText(firstText.getText().insert(firstText.getText().length(), "3"));
                    }
                });

                two.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        firstText.setText(firstText.getText().insert(firstText.getText().length(), "2"));
                    }
                });

                one.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        firstText.setText(firstText.getText().insert(firstText.getText().length(), "1"));
                    }
                });

                zero.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        int text_count = firstText.getText().length();
                        if(text_count == 1) {
                        }else{
                            firstText.setText(firstText.getText().insert(firstText.getText().length(), "0"));
                        }
                    }
                });


                dot.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        firstText.setText(firstText.getText().insert(firstText.getText().length(), "."));
                    }
                });

                delete.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        int count = firstText.getText().length();
                        if(count==1)
                        {
                            firstText.setText(" ");
                            System.out.println("Replace text with blank space");
                        }
                        else {
                            firstText.setText(firstText.getText().delete(firstText.getText().length() - 1, firstText.getText().length()));
                        }
                    }
                });
            }


            return true;
        }
    });

Answer 1

你这样做

    mSearchbox.addTextChangedListener(new TextWatcher() {
        @Override
        public void onTextChanged(CharSequence cs, int start, int before, int count) {
            ivCancelSearch.setVisibility(mSearchbox.getText().length() > 0 ? View.VISIBLE : View.GONE);
        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {
        }

        @Override
        public void afterTextChanged(Editable s) {

        }
    });

其他的similer记得获取edittext的正确ID

addTextChangedListener适用于一个EditText，但不适用于另一个

1 个答案: