android - 按键不起作用

Question

您好，我想在每次按键时从其他文本框的输入中填充一个文本框，但这并没有发生。代码是这样的

leftside.setOnKeyListener(new OnKeyListener()
    {

        @Override
        public boolean onKey(View arg0, int arg1, KeyEvent arg2) 
        {
            if(arg2.getAction() == KeyEvent.ACTION_DOWN)
            {
                Log.v("keyevent", "down");
                float value = Float.parseFloat(leftside.getText().toString());
                rightside.setText(String.valueOf(SelectConverter(Float.parseFloat(leftside.getText().toString()))));
            }
            // TODO Auto-generated method stub
            return false;
        }

    });

Answer 1

hi i wanted to populate one text box from the input of other text box on every key press but this is not happening. the code is like this

我建议您使用 TextChangedListener 和 TextWatcher 而不是 KeyListener。我认为它更适合用于实现您的目标，并且使用它更舒适。

例子:

• Android EditText text change listener
example