Android EditText监听小数点让用户只能输入小数点后两位

转自http://blog.csdn.net/xiaoyuan511/article/details/39312853

最近项目需要输入价格，但是不想让用户在小数点后面输入太多，所以我封装了一个。当用户输入小数点的时候 监听小数点后面的位数，只要大于两位就立马删掉，封装好了，直接可以拿过来用！

[java] view
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public static void setPricePoint(final EditText editText) {  

        editText.addTextChangedListener(new TextWatcher() {  

  

            @Override  

            public void onTextChanged(CharSequence s, int start, int before,  

                    int count) {  

                if (s.toString().contains(".")) {  

                    if (s.length() - 1 - s.toString().indexOf(".") > 2) {  

                        s = s.toString().subSequence(0,  

                                s.toString().indexOf(".") + 3);  

                        editText.setText(s);  

                        editText.setSelection(s.length());  

                    }  

                }  

                if (s.toString().trim().substring(0).equals(".")) {  

                    s = "0" + s;  

                    editText.setText(s);  

                    editText.setSelection(2);  

                }  

  

                if (s.toString().startsWith("0")  

                        && s.toString().trim().length() > 1) {  

                    if (!s.toString().substring(1, 2).equals(".")) {  

                        editText.setText(s.subSequence(0, 1));  

                        editText.setSelection(1);  

                        return;  

                    }  

                }  

            }  

  

            @Override  

            public void beforeTextChanged(CharSequence s, int start, int count,  

                    int after) {  

  

            }  

  

            @Override  

            public void afterTextChanged(Editable s) {  

                // TODO Auto-generated method stub  

                  

            }  

  

        });  

  

    }