如何获取android中两个EditText的同时值？

时间：2011-10-07 08:59:09

标签： android android-layout android-widget

我想将Edittext设置为，无论我写什么并输入EditText，它都应该在同一时刻写入TextView。

我认为可以通过添加任何istener来实现。 我无法实现它。所以请任何人帮助我。 ？ 感谢。

 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(excluded); //////// Error
                    }
                    catch(Exception e)
                    {
                        e.printStackTrace();
                    }
                }
                else
                {
                    amountText.setText("");
                    //excludedText.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

        }
    });

    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);
        //      double amountValue = (excluded*15/100);

                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

        }
    });

logcat的：

    10-08 10:34:27.239: ERROR/AndroidRuntime(662): FATAL EXCEPTION: main
10-08 10:34:27.239: ERROR/AndroidRuntime(662): java.lang.StackOverflowError
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.text.DynamicLayout.reflow(DynamicLayout.java:261)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.text.DynamicLayout.<init>(DynamicLayout.java:150)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.makeNewLayout(TextView.java:4851)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.checkForRelayout(TextView.java:5348)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2688)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2556)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.EditText.setText(EditText.java:75)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2531)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at com.project.TaxCalculator.GSTActivity$1.onTextChanged(GSTActivity.java:66)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2691)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2556)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.EditText.setText(EditText.java:75)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2531)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:110)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2691)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2556)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.EditText.setText(EditText.java:75)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2531)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at com.project.TaxCalculator.GSTActivity$1.onTextChanged(GSTActivity.java:66)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2691)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2556)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.EditText.setText(EditText.java:75)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2531)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:110)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2691)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2556)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.EditText.setText(EditText.java:75)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2531)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at com.project.TaxCalculator.GSTActivity$1.onTextChanged(GSTActivity.java:66)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2691)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2556)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.EditText.setText(EditText.java:75)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2531)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:110)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2691)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2556)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.EditText.setText(EditText.java:75)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2531)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at com.project.TaxCalculator.GSTActivity$1.onTextChanged(GSTActivity.java:66)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2691)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2556)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.EditText.setText(EditText.java:75)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2531)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:110)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2691)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2556)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.EditText.setText(EditText.java:75)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2531)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at com.project.TaxCalculator.GSTActivity$1.onTextChanged(GSTActivity.java:66)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2691)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2556)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.EditText.setText(EditText.java:75)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2531)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at com.project.TaxCalculator.GSTActivity$2.onTextChanged(GSTActivity.java:110)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.sendOnTextChanged(TextView.java:6131)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextView.setText(TextView.java:2691)
10-08 10:34:27.239: ERROR/AndroidRuntime(662):     at android.widget.TextVie

3 个答案:

答案 0 :(得分：5)

在EditText上使用addTextChangedListener方法，让你的类实现或定义一个实现TextWatcher类的内部类：

textMessage = (EditText)findViewById(R.id.textMessage);
    textMessage.addTextChangedListener(new TextWatcher(){
        public void afterTextChanged(Editable s) {

}
        public void beforeTextChanged(CharSequence s, int start, int count, int after){}
        public void onTextChanged(CharSequence s, int start, int before, int count){}
    });

了解更多:: Android: How can I get EditText change?

答案 1 :(得分：2)

TextView mTextView= (TextView )findViewById(R.id.textview);
EditText mEditText = (EditText)findViewById(R.id.edittext);
    mEditText .addTextChangedListener(new TextWatcher(){
        public void afterTextChanged(Editable s) {

}
        public void beforeTextChanged(CharSequence s, int start, int count, int after){}
        public void onTextChanged(CharSequence s, int start, int before, int count){
      mTextView.setText(s.toString);
}
});

答案 2 :(得分：1)

你必须实现android.text.method.Keylistener 你得到varios回调方法的地方。根据您的需要选择一种方法。

享受..

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