监听多个EditText，只有当它们都有输入后，相应Button才能被点击

Android的界面代码时或许会涉及到，代码简单易懂，方法较原始，若大家有好的方法，请告之…

/** Automatically generated file. DO NOT MODIFY */
package com.ash.edtcheckdemo;

public final class BuildConfig {
    public final static boolean DEBUG = true;
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件        475  2013-10-12 16:44  EdtCheckDemo\.classpath

     文件        848  2013-10-12 16:44  EdtCheckDemo\.project

     文件        177  2013-10-12 16:44  EdtCheckDemo\.settings\org.eclipse.jdt.core.prefs

     文件        906  2013-10-12 17:32  EdtCheckDemo\AndroidManifest.xml

     文件        906  2013-10-12 17:32  EdtCheckDemo\bin\AndroidManifest.xml

     文件        978  2013-10-12 18:49  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\activity\MainActivity$1.class

     文件       1636  2013-10-12 18:49  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\activity\MainActivity$NewWatcher.class

     文件       1469  2013-10-12 18:49  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\activity\MainActivity.class

     文件        349  2013-10-12 16:44  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\BuildConfig.class

     文件        512  2013-10-12 17:32  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\entity\EdtCheckEntity.class

     文件        346  2013-10-12 18:10  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\R$attr.class

     文件        466  2013-10-12 18:10  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\R$color.class

     文件        494  2013-10-12 18:10  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\R$dimen.class

     文件        535  2013-10-12 18:10  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\R$drawable.class

     文件        494  2013-10-12 18:10  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\R$id.class

     文件        409  2013-10-12 18:10  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\R$layout.class

     文件        603  2013-10-12 18:10  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\R$string.class

     文件        464  2013-10-12 18:10  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\R$style.class

     文件        695  2013-10-12 18:10  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\R.class

     文件        891  2013-10-12 17:32  EdtCheckDemo\bin\classes\com\ash\edtcheckdemo\utils\MyTextWatcher.class

     文件     557384  2013-10-12 18:08  EdtCheckDemo\bin\classes.dex

     文件     189231  2013-10-12 17:32  EdtCheckDemo\bin\dexedLibs\android-support-v4-2f42dedd3e3d4abe6687873ec954e6c3.jar

     文件     437321  2013-10-12 18:08  EdtCheckDemo\bin\EdtCheckDemo.apk

     文件     150027  2013-10-12 18:08  EdtCheckDemo\bin\res\drawable-hdpi\d_bg.png

     文件        616  2013-10-12 18:08  EdtCheckDemo\bin\res\drawable-hdpi\edt_bg.png

     文件       5964  2013-10-12 18:08  EdtCheckDemo\bin\res\drawable-hdpi\ic_launcher.png

     文件      19296  2013-10-12 18:08  EdtCheckDemo\bin\res\drawable-hdpi\regist_f.png

     文件      31437  2013-10-12 18:08  EdtCheckDemo\bin\res\drawable-hdpi\regist_t.png

     文件       3112  2013-10-12 17:32  EdtCheckDemo\bin\res\drawable-mdpi\ic_launcher.png

     文件       9355  2013-10-12 17:32  EdtCheckDemo\bin\res\drawable-xhdpi\ic_launcher.png

............此处省略71个文件信息