final EditText myEditText=(EditText)findViewById(R.id.editText1);    //编辑框对象  myEditText.setText("Hello EditText!");                        //设置显示内容   myEditText.setSelection(0,5);                                //设置需要选择的内容

        myEditText.setHint("请输入字符串：");                        //设置提示内容

 myEditText.setOnKeyListener(new View.OnKeyListener() {                        @Override            public boolean onKey(View arg0, int arg1, KeyEvent arg2) {                // TODO Auto-generated method stub                Toast.makeText(getApplicationContext(), "该按键的keyCode为："+arg1,                        Toast.LENGTH_LONG).show();                //显示信息                return false;            }        });