EditText文本中用正则匹配是否包含数字，及判断文本只能是纯汉字或纯字母

遇到判断EditText中文本，是否为制定格式

 EditText et;
    Button btn;

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

        et = (EditText) this.findViewById(R.id.editText1);

        btn = (Button) this.findViewById(R.id.button1);
        btn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                Pattern pattern = Pattern
                        .compile("^[\u4e00-\u9fa5]*$|^[a-zA-Z]*$");
                Matcher matcher = pattern.matcher(et.getText());

                if (et.getText() == null || et.getText().length() == 0) {
                    et.setError("不能为空");
                } else if (matcher.matches()) {
                    Toast.makeText(getApplicationContext(), "匹配",
                            Toast.LENGTH_SHORT).show();
                } else {
                    et.setError("不匹配");
                }

            }
        });

    }

-----------------判断文本是否为纯字母或纯汉字-------------------

是否包含数字用[0-9]+?

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