java - 如何将TextWatchers添加到多个EditText

我看过其他一些问题和帖子，但是似乎无法弄清楚……我正在构建一个转换应用程序，可以通过使用addTextChangedListener插入英寸来自动填充Feet和Yards，但是我无法弄清楚如何将TextChangedListener添加到其他字段，以便我可以输入Feet并自动将其转换为Inches and Yards，以及将Yards转换为Inches and Feet ...

   @Override
protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);

       final EditText editIn = (EditText) findViewById(R.id.editIn);
       final EditText editFt = (EditText) findViewById(R.id.editFt);
       final EditText editYd = (EditText) findViewById(R.id.editYd);

       editIn.addTextChangedListener(new TextWatcher() {
           @Override
           public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) { }
           @Override
           public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {
               try {
                   double in = Double.valueOf(editIn.getText().toString());
                   double ft = in / 12;
                   double yd = in / 36;
                   editFt.setText(String.valueOf(ft));
                   editYd.setText(String.valueOf(yd));
               } catch (NumberFormatException e) {
                   e.printStackTrace();
               }
           }
           @Override
           public void afterTextChanged(Editable editable) { }

最佳答案

    TextWatcher watcher = new TextWatcher() {

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
            //YOUR CODE
        }

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

        @Override
        public void afterTextChanged(Editable s) {

                //YOUR CODE
        }
    };

    editIn.addTextChangedListener(watcher);
    editFt.addTextChangedListener(watcher);
    editYd.addTextChangedListener(watcher);