[移动开发]Android editText的知识点

1.如何让editText键盘自动弹出

editNum.setFocusable(true); //auto get the key
editNum.setFocusableInTouchMode(true);
editNum.requestFocus();
InputMethodManager imm = (InputMethodManager) getContext()
        .getSystemService(Context.INPUT_METHOD_SERVICE);
imm.toggleSoftInput(0, InputMethodManager.SHOW_FORCED);

2.设置字体居中

editNum.setTextAlignment(TextView.TEXT_ALIGNMENT_CENTER);

3.设置限制长度

editNum.setFilters(new InputFilter[]{new InputFilter.LengthFilter(12)});