{"id":634,"date":"2016-12-18T10:03:44","date_gmt":"2016-12-18T01:03:44","guid":{"rendered":"http:\/\/blue-bear.jp\/kb\/?p=634"},"modified":"2016-12-18T10:07:58","modified_gmt":"2016-12-18T01:07:58","slug":"android-nullpointerexception-attempt-to-invoke-virtual-method-void-android-widget-button-setonclicklistener%e3%82%a8%e3%83%a9%e3%83%bc%e3%81%ae%e5%af%be%e5%87%a6%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/blue-bear.jp\/kb\/android-nullpointerexception-attempt-to-invoke-virtual-method-void-android-widget-button-setonclicklistener%e3%82%a8%e3%83%a9%e3%83%bc%e3%81%ae%e5%af%be%e5%87%a6%e6%96%b9%e6%b3%95\/","title":{"rendered":"[android] NullPointerException: Attempt to invoke virtual method &#8216;void android.widget.Button.setOnClickListener\u30a8\u30e9\u30fc\u306e\u5bfe\u51e6\u65b9\u6cd5"},"content":{"rendered":"<h2>NullPointerException: Attempt to invoke virtual method &#8216;void android.widget.Button.setOnClickListener\u30a8\u30e9\u30fc\u306e\u5bfe\u51e6\u65b9\u6cd5<\/h2>\n<p>Avtivity\u4e0a\u306bButton\u3092\u914d\u7f6e\u3057\u3066\u3001onClickListner\u3092\u8a2d\u5b9a\u3057\u305f\u3089NullPointer\u30a8\u30e9\u30fc\u304c\u51fa\u305f\u3002<\/p>\n<p>\u8abf\u3079\u3066\u307f\u305f\u3089\u3001View\u304c\u914d\u7f6e\u3055\u308c\u308bonCreateView\u3067Button\u306e\u914d\u7f6e\u3068onClickListner\u3092\u8a2d\u5b9a\u304c\u5fc5\u8981\u3060\u3063\u305f\u3002<br \/>\n\u30a8\u30e9\u30fc\u767a\u751f\u6642\u306fonCreate\u3067\u4f5c\u6210\u3057\u3066\u3044\u305f\u3002<\/p>\n<h3>\u89e3\u6c7a\u524d\uff1a<\/h3>\n<pre>\r\n    @Override\r\n    public void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n        Button button = (Button)this.findViewById(R.id.button);\r\n        button.setOnClickListener(new View.OnClickListener() {\r\n            @Override\r\n            public void onClick(View v) {\r\n                Toast.makeText(getActivity(), \"hoge!\", Toast.LENGTH_SHORT).show();\r\n            }\r\n        });\r\n    }\r\n\r\n    @Override\r\n    public View onCreateView(LayoutInflater inflater, ViewGroup container,\r\n                             Bundle savedInstanceState) {\r\n        return inflater.inflate(R.layout.fragment_main, null, false);\r\n    }\r\n\r\n<\/pre>\n<h3>\u89e3\u6c7a\u5f8c<\/h3>\n<pre>\r\n    @Override\r\n    public void onCreate(Bundle savedInstanceState) {\r\n        super.onCreate(savedInstanceState);\r\n    }\r\n\r\n    @Override\r\n    public View onCreateView(LayoutInflater inflater, ViewGroup container,\r\n                             Bundle savedInstanceState) {\r\n        final View view = inflater.inflate(R.layout.fragment_main, null, false);\r\n        Button button = (Button)view.findViewById(R.id.button);\r\n        button.setOnClickListener(new View.OnClickListener() {\r\n            @Override\r\n            public void onClick(View v) {\r\n                Toast.makeText(getActivity(), \"hoge!\", Toast.LENGTH_SHORT).show();\r\n            }\r\n        });\r\n\r\n        return view;\r\n    }\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>NullPointerException<\/p>\n","protected":false},"author":1,"featured_media":383,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[31],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/blue-bear.jp\/kb\/wp-json\/wp\/v2\/posts\/634"}],"collection":[{"href":"https:\/\/blue-bear.jp\/kb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blue-bear.jp\/kb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blue-bear.jp\/kb\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blue-bear.jp\/kb\/wp-json\/wp\/v2\/comments?post=634"}],"version-history":[{"count":3,"href":"https:\/\/blue-bear.jp\/kb\/wp-json\/wp\/v2\/posts\/634\/revisions"}],"predecessor-version":[{"id":637,"href":"https:\/\/blue-bear.jp\/kb\/wp-json\/wp\/v2\/posts\/634\/revisions\/637"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blue-bear.jp\/kb\/wp-json\/wp\/v2\/media\/383"}],"wp:attachment":[{"href":"https:\/\/blue-bear.jp\/kb\/wp-json\/wp\/v2\/media?parent=634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blue-bear.jp\/kb\/wp-json\/wp\/v2\/categories?post=634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blue-bear.jp\/kb\/wp-json\/wp\/v2\/tags?post=634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}