android edittext 限制输入框小数位数

先看下XML布局文件

<EditText            android:id="@+id/et"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_toLeftOf="@+id/tv_count"            android:background="@null"            android:hint="@string/free_txt"            android:inputType="numberDecimal"            android:maxLength="10"            android:singleLine="true"            android:textColor="@color/txt_black1"            android:textColorHint="@color/txt_gray2"            android:textSize="@dimen/textsize16" />

android:inputType="numberDecimal"

这句的属性是可输入小数

/** 输入框小数的位数*/private static final int DECIMAL_DIGITS = 1;

/** *  设置小数位数控制    */    InputFilter lengthfilter = new InputFilter() {           public CharSequence filter(CharSequence source, int start, int end,                   Spanned dest, int dstart, int dend) {               // 删除等特殊字符，直接返回               if ("".equals(source.toString())) {                   return null;               }               String dValue = dest.toString();               String[] splitArray = dValue.split("\\.");               if (splitArray.length > 1) {                   String dotValue = splitArray[1];                   int diff = dotValue.length() + 1 - DECIMAL_DIGITS;                   if (diff > 0) {                       return source.subSequence(start, end - diff);                   }               }               return null;           }       };

mEt.addTextChangedListener(mTextWatcher);// 控制输入框的小数位和长度,这里长度暂时设置为10mEt.setFilters(new InputFilter[] { lengthfilter, new InputFilter.LengthFilter(10) });

这样就OK了，很简单吧，其实这个InputFilter很强大滴

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