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在我的应用程序中有两个 EditText 和一个 TextView。我已经在这两个 EditText 上设置了两个 Textwatcher。基于该 EditText 中的值，另一个 EditText 的值被更改，它也适用于 textView。一切顺利。但是，如果我将另一个 Edittext 设置为基于另一个 EditText 更改它的值，那么它会给我 stackOverflow 错误。我不知道我错在哪里。而且我无法为两个 EditText 放置 TextWatcher 以更改彼此的值。

请帮帮我。谢谢。代码 ：

 amountText.setText(""); // TextView
    excludedText.setText(""); // EditText
    includedText.setText(""); // EditText


    includedText.addTextChangedListener(new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

                if(!(includedText.getText().toString().equals("")))
                {
                    double included = Double.parseDouble(includedText.getText().toString());
                    included = roundTwoDecimals(included);
        //          double amountValue = (excluded*15/100);

                    String amt = String.valueOf(roundTwoDecimals(included-(included/1.15)));
                    String excluded = String.valueOf(included/1.15);
                    System.out.println("The Amount is: "+amt);
                    amountText.setText(amt);
                    try{
                        excludedText.setText("");
                        excludedText.setText(excluded); //////// Error Line
                    }
                    catch(Exception e)
                    {
                        e.printStackTrace();
                    }
                }
                else
                {
                    amountText.setText("");
                    excludedText.setText(""); // Error line
                }

        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
            // TODO Auto-generated method stub

        }

        @Override
        public void afterTextChanged(Editable s) {
            // TODO Auto-generated method stub

        }
    });

    excludedText.addTextChangedListener(new TextWatcher() 
    {

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            if(!(excludedText.getText().toString().equals("")))
            {
                double excluded = Double.parseDouble(excludedText.getText().toString());
                excluded = roundTwoDecimals(excluded);

                String amt = String.valueOf(roundTwoDecimals(excluded*0.15));
                String included = String.valueOf(roundTwoDecimals(excluded+(excluded*0.15)));
                System.out.println("The Amount is: "+amt);
                amountText.setText(amt);
                includedText.setText(included);
            }
            else
            {
                amountText.setText("");
                includedText.setText("");
            }

        }

        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
            // TODO Auto-generated method stub

        }

        @Override
        public void afterTextChanged(Editable s) {
            // TODO Auto-generated method stub

        }
    });

这里我的 Logcat 是：

10-11 09:47:28.288: ERROR/AndroidRuntime(363): FATAL EXCEPTION: main
10-11 09:47:28.288: ERROR/AndroidRuntime(363): java.lang.StackOverflowError
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at     android.text.DynamicLayout.reflow(DynamicLayout.java:261)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.text.DynamicLayout.<init>(DynamicLayout.java:150)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at  android.widget.TextView.makeNewLayout(TextView.java:4851)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.checkForRelayout(TextView.java:5348)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2688)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2556)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.EditText.setText(EditText.java:75)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2531)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at com.project.TaxCalculator.GSTActivity$1.onTextChanged(GSTActivity.java:73)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2691)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2556)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.EditText.setText(EditText.java:75)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2531)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:111)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2691)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2556)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.EditText.setText(EditText.java:75)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2531)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at com.project.TaxCalculator.GSTActivity$1.onTextChanged(GSTActivity.java:73)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2691)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2556)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.EditText.setText(EditText.java:75)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2531)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:111)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2691)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2556)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.EditText.setText(EditText.java:75)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2531)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at com.project.TaxCalculator.GSTActivity$1.onTextChanged(GSTActivity.java:73)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2691)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2556)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.EditText.setText(EditText.java:75)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2531)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:111)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2691)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2556)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.EditText.setText(EditText.java:75)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2531)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at com.project.TaxCalculator.GSTActivity$1.onTextChanged(GSTActivity.java:73)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2691)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2556)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.EditText.setText(EditText.java:75)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2531)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:111)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2691)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2556)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.EditText.setText(EditText.java:75)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2531)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at com.project.TaxCalculator.GSTActivity$1.onTextChanged(GSTActivity.java:73)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2691)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2556)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.EditText.setText(EditText.java:75)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2531)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:111)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextView.setText(TextView.java:2691)
10-11 09:47:28.288: ERROR/AndroidRuntime(363):     at android.widget.TextVie

请参考这个 logcat 并帮助我解决它。谢谢。

4

3 回答 3

2

这是stackoverflow您将陷入无限循环的问题。

您正在从第二个更新一个 edittext 的值，反之亦然。

例如 ：：

当您在第一个编辑文本中输入字符时，它将设置第二个编辑文本的文本，当时在第二个编辑文本中您编写了一个代码来设置第一个编辑文本的文本，以便您进入无限循环。

编辑

et1 = (EditText)findViewById(R.id.et1);
et2 = (EditText)findViewById(R.id.et2);

OnKeyListener onKeyListener = new OnKeyListener() {

            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                String str = ((EditText)v).getText().toString();
                if(v == et1) {
                    et2.setText(str);
                }else {
                    et1.setText(str);
                }
                return false;
            }
        };
        et1.setOnKeyListener(onKeyListener);
        et2.setOnKeyListener(onKeyListener);
于 2011-10-11T04:51:01.763 回答
1

您可以尝试将代码放入“afterTextChanged”，但我认为它会导致相同的无限循环。这就是为什么我不明白两个输入如何相互依赖，这意味着，如果 EditText-A 更改 ET-B 的文本，那么 ET-B 如何再次更改 ET-A 中的文本，这不会任何意义。

于 2011-10-11T07:25:05.503 回答
1

每次在 EditText 中更改文本时，都会调用 TextWatcher（如果已定义并取决于您实现的覆盖方法）。因此，根据您要完成的任务，如果编辑 EditText A 的文本，则调用 TextWatcher 并编辑 EditText B 的文本，然后调用其相应的 TextWatcher，后者编辑 EditText A 的调用文本……简而言之，这是一种不好的做法。

于 2011-10-11T07:37:22.060 回答