\nhttps:\/\/developer.android.com\/training\/data-storage\/shared-preferences<\/a><\/p>\n
2. \u3084\u3063\u3066\u307f\u308b<\/h1>\n1) \u4f5c\u308b\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4ed5\u69d8<\/h2>\n
1. \u753b\u9762\u4e0a\u306b\u3001EditText, Button(WRITE), Button(READ), TextView \u306e\u5168 4\u500b\u306e View\u3092\u914d\u7f6e\u3059\u308b\u3002 \u5171\u6709\u74b0\u5883\u8a2d\u5b9a\u30d5\u30a1\u30a4\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u306e\u30e6\u30cb\u30fc\u30af\u306a\u8b58\u5225\u5b50\u3092\u4f5c\u308b\u3002 1. \u3084\u308a\u305f\u3044\u3053\u3068 \u4ee5\u4e0b\u306e Android\u516c\u5f0f\u30da\u30fc\u30b8\u306e\u8a18\u8ff0\u306b\u5f93\u3063\u3066 SharedPreferences \u3092\u4f7f\u3044 Key-Value\u578b \u306e\u30c7\u30fc\u30bf\u306e Read\/Write\u3092\u5b9f\u88c5\u3057\u3066\u307f\u305f\u3002 https:\/\/developer.\u2026 \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":[2],"tags":[],"class_list":["post-704","post","type-post","status-publish","format-standard","hentry","category-androidstudio"],"views":701,"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/posts\/704","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/comments?post=704"}],"version-history":[{"count":17,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/posts\/704\/revisions"}],"predecessor-version":[{"id":722,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/posts\/704\/revisions\/722"}],"wp:attachment":[{"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/media?parent=704"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/categories?post=704"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dogrow.net\/android\/wp-json\/wp\/v2\/tags?post=704"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n2. EditText\u306b\u30c6\u30ad\u30b9\u30c8\u3092\u5165\u529b\u3057\u3001Button(W)\u3092\u62bc\u4e0b\u3059\u308b\u3068\u3001SharedPreferences\u306b\u30c6\u30ad\u30b9\u30c8\u3092\u4fdd\u5b58\u3059\u308b\u3002
\n3. Button(R)\u3092\u62bc\u4e0b\u3059\u308b\u3068\u3001SharedPreferences\u306b\u4fdd\u5b58\u3055\u308c\u305f\u5168\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u51fa\u3057\u3001TextView\u306b\u4fdd\u5b58\u3059\u308b\u3002
\n4. SharedPreferences\u306b\u4fdd\u5b58\u3059\u308b\u30c7\u30fc\u30bf\u306e Key-Value<\/span> \u306e\u7d44\u307f\u5408\u308f\u305b\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002
\n\n
#<\/td> key<\/span><\/td> value<\/span><\/td><\/tr> 1<\/td> n<\/b><\/td> \u767b\u9332\u6570<\/td><\/tr> 2<\/td> t1<\/b><\/td> \u30c6\u30ad\u30b9\u30c8(1\u756a\u76ee)<\/td><\/tr> <\/td> t2<\/b><\/td> \u30c6\u30ad\u30b9\u30c8(2\u756a\u76ee)<\/td><\/tr> <\/td> :<\/td> :<\/td><\/tr> <\/td> tn<\/b><\/td> \u30c6\u30ad\u30b9\u30c8(n\u756a\u76ee)<\/td><\/tr>\n<\/table><\/p>\n ![\"\"](\"https:\/\/www.dogrow.net\/android\/wp-content\/uploads\/2023\/03\/i001.jpg\")
<\/p>\n(1) \u30ea\u30bd\u30fc\u30b9<\/h3>\n
\n{applicationId}.PREFERENCE_FILE_KEY<\/span>
\n\u306b\u3057\u3066\u304a\u3051\u3070\u3001\u4ed6\u306e\u30a2\u30d7\u30ea\u3068\u306f\u88ab\u3089\u306a\u3044\u306f\u305a\u3001\u3068\u306e\u3053\u3068\u3002(\u4e0a\u8a18\u306e Android\u516c\u5f0f\u30b5\u30a4\u30c8\u306e\u8aac\u660e\u3092\u53c2\u7167\u306e\u3053\u3068)<\/p>\n\r\n<resources>\r\n <string name="app_name">TestSharedPreferences<\/string>\r\n <string name="preference_file_key">com.example.testsharedpreferences.PREFERENCE_FILE_KEY<\/string>\r\n<\/resources>\r\n<\/pre>\n
(2) Java\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9<\/h3>\n
\r\npackage com.example.testsharedpreferences;\r\n\r\nimport androidx.appcompat.app.AppCompatActivity;\r\n\r\nimport android.content.Context;\r\nimport android.content.SharedPreferences;\r\nimport android.os.Bundle;\r\nimport android.view.View;\r\nimport android.widget.EditText;\r\nimport android.widget.TextView;\r\n\r\nimport java.util.ArrayList;\r\nimport java.util.List;\r\n\r\npublic class MainActivity extends AppCompatActivity {\r\n private SharedPreferences sharedPref;\r\n\r\n @Override\r\n protected void onCreate(Bundle savedInstanceState) {\r\n super.onCreate(savedInstanceState);\r\n setContentView(R.layout.activity_main);\r\n\r\n this.sharedPref = this.getSharedPreferences(\r\n getString(R.string.preference_file_key), Context.MODE_PRIVATE);\r\n }\r\n\r\n \/* \u4fdd\u5b58\u3059\u308b\u30c7\u30fc\u30bf\u69cb\u9020\r\n n : \u30c7\u30fc\u30bf\u6570\r\n t1\uff5etn : \u30c7\u30fc\u30bf(Text)\r\n *\/\r\n private void ExecSave(String txt){\r\n int n = this.sharedPref.getInt("n", 0);\r\n if(txt != ""){\r\n String newKey = String.format("t%d", n);\r\n n++;\r\n\r\n SharedPreferences.Editor editor = this.sharedPref.edit();\r\n editor.putInt("n", n);\r\n editor.putString(newKey, txt);\r\n editor.apply();\r\n }\r\n }\r\n\r\n private List<String> ExecRead(){\r\n List<String> list = new ArrayList<>();\r\n int n = this.sharedPref.getInt("n", 0);\r\n for(int i = 0 ; i < n ; i++ ){\r\n String key = String.format("t%d", i);\r\n String val = this.sharedPref.getString(key, "*");\r\n list.add(val);\r\n }\r\n return list;\r\n }\r\n\r\n public void onPushWrite(View view){\r\n EditText et = this.findViewById(R.id.et_text);\r\n String txt = et.getText().toString();\r\n ExecSave(txt);\r\n }\r\n\r\n public void onPushRead(View view){\r\n List<String> txtList = this.ExecRead();\r\n String txt = "";\r\n for(String s : txtList){\r\n txt += s + "\\n";\r\n }\r\n TextView tv = this.findViewById(R.id.tv_list);\r\n tv.setText(txt);\r\n }\r\n\r\n}\r\n<\/pre>\n
\n","protected":false},"excerpt":{"rendered":"