{"id":1703,"date":"2017-09-25T15:48:38","date_gmt":"2017-09-25T06:48:38","guid":{"rendered":"http:\/\/kuuur.net\/?p=1703"},"modified":"2017-09-25T15:48:38","modified_gmt":"2017-09-25T06:48:38","slug":"nullorzero","status":"publish","type":"post","link":"https:\/\/kuuur.net\/?p=1703","title":{"rendered":"Android\u30a2\u30d7\u30ea\uff1a\u6570\u5024\u578b\u306eView\u306e\u5024\u304cNull\u304b0\u4ee5\u4e0b\u304b\u3092\u5224\u5b9a\u3059\u308b"},"content":{"rendered":"<p>Android Studio\u3067\u6570\u5024\u578b\u306eEditText\u306eView\u3092\u914d\u7f6e\u3057\u3066\u3001\u5024\u3092\u53d6\u5f97\u3057\u305f\u5834\u5408\u306b\u3001\u305d\u306e\u5024\u304cNull\u5024\uff08\u7a7a\uff09\u3082\u3057\u304f\u306f0\u4ee5\u4e0b\u3067\u3042\u308b\u304b\u5426\u304b\u3092\u5224\u5b9a\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n<h2>Null\u5224\u5b9a\u306blength()\u3092\u4f7f\u3046<\/h2>\n<p class=\"source\">public void NullOrZero(View view){<br \/>\nEditText et = (EditText)findViewById(R.id.num_field);<br \/>\nString StringToNum = et.getText().toString();<br \/>\n<strong>if (StringToNum.length() == 0 || Integer.parseInt(StringToNum)&lt;1){<\/strong><br \/>\n<strong>\/\/ Null\u5024\u304b0\u4ee5\u4e0b\u3067\u3042\u3063\u305f\u5834\u5408\u306e\u51e6\u7406<\/strong><br \/>\n<strong>}<\/strong><br \/>\n}<\/p>\n<p>\u300cStringToNum.length() == 0\u300d\u306f\u3001StringToNum\u3068\u3044\u3046\u5909\u6570\u306b\u683c\u7d0d\u3055\u308c\u305f\u6587\u5b57\u5217\u306e\u9577\u3055\u304c0\u3067\u3042\u308b\u3001\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002<br \/>\n\u9577\u3055\u304c0\u3068\u3044\u3046\u3053\u3068\u306f\u4f55\u3082\u5165\u529b\u3055\u308c\u3066\u3044\u306a\u3044\u3001\u3068\u3044\u3046\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<br \/>\n\u307e\u305f\u3001\u300cInteger.parseInt(StringToNum)&lt;1\u300d\u306f\u3001StringToNum\u3092\u6570\u5024\u306b\u5909\u63db\u3057\u305f\u7d50\u679c\u304c1\u3088\u308a\u4e0b\u3067\u3042\u308b\u3001\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002<br \/>\nInteger.parseInt()\u306e\u90e8\u5206\u306f\u3001StringToNum\u306e\u5024\u304cNull\u3067\u3042\u3063\u305f\u5834\u5408\u306b\u306f\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u304c\u3001\u5148\u306bNull\u5024\u5224\u5b9a\u3092\u884c\u3063\u3066\u304b\u3089\u3053\u306e\u90e8\u5206\u304c\u5b9f\u884c\u3055\u308c\u308b\u306e\u3067\u3001\u3053\u306e\u3088\u3046\u306b\u66f8\u3051\u3070\u30a8\u30e9\u30fc\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n<h2>Null\u5224\u5b9a\u306bisEmpty()\u3092\u4f7f\u3046<\/h2>\n<p class=\"source\">public void NullOrZero(View view){<br \/>\nEditText et = (EditText)findViewById(R.id.num_field);<br \/>\nString StringToNum = et.getText().toString();<br \/>\n<strong>if (TextUtils.isEmpty(StringToNum)== true || Integer.parseInt(StringToNum)&lt;1){<\/strong><br \/>\n<strong>\/\/ Null\u5024\u304b0\u4ee5\u4e0b\u3067\u3042\u3063\u305f\u5834\u5408\u306e\u51e6\u7406<\/strong><br \/>\n<strong>}<\/strong><br \/>\n}<\/p>\n<p>\u300cTextUtils.isEmpty(StringToNum)==true\u300d\u306f\u3001StringToNum\u304cNull\u5024\u3067\u3042\u308b\u3001\u3068\u3044\u3046\u610f\u5473\u3067\u3059\u3002<br \/>\nNull\u5024\u3067\u306f\u306a\u3044\u5834\u5408\u306b\u306f\u3001false\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Android Studio\u3067\u6570\u5024\u578b\u306eEditText\u306eView\u3092\u914d\u7f6e\u3057\u3066\u3001\u5024\u3092\u53d6\u5f97\u3057\u305f\u5834\u5408\u306b\u3001\u305d\u306e\u5024\u304cNull\u5024\uff08\u7a7a\uff09\u3082\u3057\u304f\u306f0\u4ee5\u4e0b\u3067\u3042\u308b\u304b\u5426\u304b\u3092\u5224\u5b9a\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002 Null\u5224\u5b9a\u306blength()\u3092&#8230;<span class=\"continue\"><a href=\"https:\/\/kuuur.net\/?p=1703\">\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/span><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30],"tags":[],"class_list":["post-1703","post","type-post","status-publish","format-standard","hentry","category-android"],"views":8897,"_links":{"self":[{"href":"https:\/\/kuuur.net\/index.php?rest_route=\/wp\/v2\/posts\/1703","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kuuur.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kuuur.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kuuur.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kuuur.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1703"}],"version-history":[{"count":1,"href":"https:\/\/kuuur.net\/index.php?rest_route=\/wp\/v2\/posts\/1703\/revisions"}],"predecessor-version":[{"id":1704,"href":"https:\/\/kuuur.net\/index.php?rest_route=\/wp\/v2\/posts\/1703\/revisions\/1704"}],"wp:attachment":[{"href":"https:\/\/kuuur.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kuuur.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kuuur.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}