那些遇到过的问题

Android:为什么我无法相对于另一个EditText更改EditText的值？

Shr*_*jan 4 android android-layout textchanged android-edittext

我将根据另一个edittext上的值输入更改edittext的文本.并且也喜欢相同的thig,反之亦然.

为此,我使用TextChanged Listener并实现如下:

 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);

                    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);
                    excludedText.setText(excluded); //////// Error Line
                }
        }

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

        @Override
        public void afterTextChanged(Editable s) {
        }
    });


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

        @Override
        public void afterTextChanged(Editable s) {
        }
    });
}
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但在这样做后,我无法改变文本.对于Secod EditText来说它工作得很好但是当我使用First EditText时它会在注释行中给出错误.

错误日志:

12-22 13:08:17.640: ERROR/AndroidRuntime(1077): FATAL EXCEPTION: main
12-22 13:08:17.640: ERROR/AndroidRuntime(1077): java.lang.StackOverflowError
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.text.TextUtils.getChars(TextUtils.java:69)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.text.TextUtils.indexOf(TextUtils.java:102)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.text.StaticLayout.generate(StaticLayout.java:131)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.text.DynamicLayout.reflow(DynamicLayout.java:261)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.text.DynamicLayout.<init>(DynamicLayout.java:150)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.makeNewLayout(TextView.java:4851)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.checkForRelayout(TextView.java:5348)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2688)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2556)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.EditText.setText(EditText.java:75)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2531)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:93)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2691)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2556)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.EditText.setText(EditText.java:75)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2531)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at com.project.TaxCalculator.GSTActivity$1.afterTextChanged(GSTActivity.java:74)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.sendAfterTextChanged(TextView.java:6145)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2695)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2556)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.EditText.setText(EditText.java:75)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2531)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:93)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2691)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2556)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.EditText.setText(EditText.java:75)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2531)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at com.project.TaxCalculator.GSTActivity$1.afterTextChanged(GSTActivity.java:74)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.sendAfterTextChanged(TextView.java:6145)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2695)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2556)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.EditText.setText(EditText.java:75)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2531)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:93)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2691)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2556)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.EditText.setText(EditText.java:75)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2531)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at com.project.TaxCalculator.GSTActivity$1.afterTextChanged(GSTActivity.java:74)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.sendAfterTextChanged(TextView.java:6145)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2695)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2556)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.EditText.setText(EditText.java:75)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2531)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:93)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2691)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2556)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.EditText.setText(EditText.java:75)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2531)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at com.project.TaxCalculator.GSTActivity$1.afterTextChanged(GSTActivity.java:74)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.sendAfterTextChanged(TextView.java:6145)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2695)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2556)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.EditText.setText(EditText.java:75)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2531)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:93)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2691)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2556)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.EditText.setText(EditText.java:75)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at android.widget.TextView.setText(TextView.java:2531)
12-22 13:08:17.640: ERROR/AndroidRuntime(1077):     at com.project.TaxCalculator.GSTAct
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那么这有什么不对吗？为什么我无法同时使用EditText？谢谢.

Suj*_*jit 13

这是因为你在onTextChanged中做了setText() .因此,当您更改文本onTextChanged将被调用并再次在onTextChanged内调用setText().所以thr文本再次更改,onTextChanged()将再次被调用,此过程将继续,直到堆栈溢出并导致stackOverFlow错误.希望你能理解......

用户 在setText()之前删除了TextChangedListener ().

编辑:

定义
TextWatcher excludeTW,includeTW;// globaly.

    includedText = (EditText)findViewById(R.id.include);
    excludedText = (EditText)findViewById(R.id.exclude);

    includeTW = new TextWatcher(){

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

        }

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

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before,
                int count) {
             if(!(includedText.getText().toString().equals("")))
                {
                    excludedText.removeTextChangedListener(excludeTW);
                    String included = includedText.getText().toString();
                    excludedText.setText(included); //////// Error Line
                }

        }



    };


    excludeTW = new TextWatcher(){

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

        }

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

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before,
                int count) {
        includedText.removeTextChangedListener(includeTW);
        String excluded = excludedText.getText().toString();
        includedText.setText(excluded);

        }



    };
    includedText.addTextChangedListener(includeTW) ;
    excludedText.addTextChangedListener(excludeTW);
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