2019独角兽企业重金招聘Python工程师标准>>> 
et.addTextChangedListener(new TextWatcher()
{
int index = 0;
@Override
public void onTextChanged(CharSequence s, int start, int before, int count)
{
// TODO Auto-generated method stub
}
@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
et.removeTextChangedListener(this);//解除文字改变事件
index = et.getSelectionStart();//获取光标位置
et.setText(s.toString().toUpperCase());转换
et.setSelection(index);//重新设置光标位置
et.addTextChangedListener(this);//重新绑定事件
Log.i("mylog", s.toString());
}
});