的EditText - 改变文本的同时输入

问题描述

我需要更换的EditText内的文本，同时输入：例如：如果用户pressedA将它保存到缓冲区，并在EditText上D显示，而不是（貌似他pressedD）。现在，我可以读pressed字符，但我不能在等显示任何字符，避免计算器：

 最后的EditText等=（EditText上）findViewById（R.id.editTexts）;
    最后的TextView电视=（TextView中）findViewById（R.id.textView2）;

    et.addTextChangedListener（新TextWatcher（）
    {
            公共无效afterTextChanged（编辑S）{}
            公共无效beforeTextChanged（CharSequence中，诠释开始，诠释计数，之后INT）{

            }
            公共无效onTextChanged（CharSequence中，诠释开始，诠释之前，诠释计数）{
                如果（s.length（）大于0）{
                    tv.setText（s.toString（）子（s.length（） -  1））;
                    et.setText（）;
                }
            }
    }）;
 

解决方案

您可以将其作为改变要求::

 公共类SampleActivity延伸活动{
    TextWatcher TT = NULL;
    / **第一次创建活动时调用。 * /
    @覆盖
    公共无效的onCreate（包savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.main）;
        最后的EditText等=（EditText上）findViewById（R.id.editText1）;
        最后的TextView电视=（TextView中）findViewById（R.id.textView1）;
        TT =新TextWatcher（）{
           公共无效afterTextChanged（编辑S）{
                et.setSelection（s.length（））;
           }
           公共无效beforeTextChanged（CharSequence中，诠释开始，诠释计数，之后INT）{}
           公共无效onTextChanged（CharSequence中，诠释开始，诠释之前，诠释计数）{
               et.removeTextChangedListener（TT）;
               et.setText（et.getText（）的toString（）代替（A，C））;
               et.addTextChangedListener（TT）;
           }
       };
       et.addTextChangedListener（TT）;
   }
}
 

I need to replace the text inside the EditText while typing :Example : if the user pressed "A" it would be stored into a buffer and on the EditText "D" is displayed instead (looks like he pressed "D").Now I can read the pressed character but I can't display any character in the et to avoid stackoverflow :

final EditText et = (EditText) findViewById(R.id.editTexts);
    final TextView tv = (TextView) findViewById(R.id.textView2);

    et.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) {
                if(s.length() > 0) {
                    tv.setText(s.toString().substring(s.length()-1));
                    et.setText("");
                }
            }
    });

解决方案

You can change it as required::

public class SampleActivity extends Activity {
    TextWatcher tt = null;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        final EditText et = (EditText) findViewById(R.id.editText1);
        final TextView tv = (TextView) findViewById(R.id.textView1);
        tt = new TextWatcher() {
           public void afterTextChanged(Editable s){
                et.setSelection(s.length());
           }
           public void beforeTextChanged(CharSequence s,int start,int count, int after){}
           public void onTextChanged(CharSequence s, int start, int before, int count) {
               et.removeTextChangedListener(tt);
               et.setText(et.getText().toString().replace("A", "C"));
               et.addTextChangedListener(tt);
           }
       };
       et.addTextChangedListener(tt);
   }
}

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