{"id":727,"date":"2023-02-19T03:47:11","date_gmt":"2023-09-22T14:25:48","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/%e3%82%a2%e3%83%b3%e3%83%89%e3%83%ad%e3%82%a4%e3%83%89%e3%81%ae%e5%86%85%e9%83%a8%e3%82%b9%e3%83%88%e3%83%ac%e3%83%bc%e3%82%b8%e3%81%ae%e4%be%8b%e3%81%ae%e3%83%81%e3%83%a5%e3%83%bc%e3%83%88%e3%83%aa\/"},"modified":"2025-08-01T01:59:13","modified_gmt":"2025-07-31T16:59:13","slug":"%e3%82%a2%e3%83%b3%e3%83%89%e3%83%ad%e3%82%a4%e3%83%89%e3%81%ae%e5%86%85%e9%83%a8%e3%82%b9%e3%83%88%e3%83%ac%e3%83%bc%e3%82%b8%e3%81%ae%e4%be%8b%e3%81%ae%e3%83%81%e3%83%a5%e3%83%bc%e3%83%88%e3%83%aa","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%e3%82%a2%e3%83%b3%e3%83%89%e3%83%ad%e3%82%a4%e3%83%89%e3%81%ae%e5%86%85%e9%83%a8%e3%82%b9%e3%83%88%e3%83%ac%e3%83%bc%e3%82%b8%e3%81%ae%e4%be%8b%e3%81%ae%e3%83%81%e3%83%a5%e3%83%bc%e3%83%88%e3%83%aa\/","title":{"rendered":"\u30a2\u30f3\u30c9\u30ed\u30a4\u30c9\u306e\u5185\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u4f8b\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb"},"content":{"rendered":"<p>\u672c\u65e5\u306f\u3001Android\u306e\u5185\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u306b\u3064\u3044\u3066\u8abf\u3079\u3066\u307f\u307e\u3057\u3087\u3046\u3002Android\u306f\u3001\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3059\u308b\u305f\u3081\u306e\u3044\u304f\u3064\u304b\u306e\u69cb\u9020\u5316\u3055\u308c\u305f\u65b9\u6cd5\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306b\u306f\u3001<\/p>\n<ul class=\"post-ul\">\n<li>Shared Preferences<\/li>\n<li>Internal Storage<\/li>\n<li>External Storage<\/li>\n<li>SQLite Storage<\/li>\n<li>Storage via Network Connection(on cloud)<\/li>\n<\/ul>\n<p>\u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001Android\u306e\u5185\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u3092\u4f7f\u7528\u3057\u3066\u30c7\u30fc\u30bf\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u4fdd\u5b58\u304a\u3088\u3073\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h2>\u30a2\u30f3\u30c9\u30ed\u30a4\u30c9\u306e\u5185\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8<\/h2>\n<p>Android\u306e\u5185\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u306f\u3001\u30c7\u30d0\u30a4\u30b9\u306e\u30e1\u30e2\u30ea\u4e0a\u306b\u3042\u308b\u500b\u4eba\u30c7\u30fc\u30bf\u306e\u4fdd\u5b58\u9818\u57df\u3067\u3059\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u3067\u306f\u3001\u5185\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u3078\u306e\u30d5\u30a1\u30a4\u30eb\u306e\u4fdd\u5b58\u3084\u8aad\u307f\u8fbc\u307f\u306f\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u5bfe\u3057\u3066\u306e\u307f\u30d7\u30e9\u30a4\u30d9\u30fc\u30c8\u3068\u306a\u308a\u3001\u4ed6\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306f\u3053\u308c\u3089\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u307e\u305b\u3093\u3002\u30e6\u30fc\u30b6\u30fc\u304c\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u30a2\u30f3\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308b\u3068\u3001\u305d\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u95a2\u9023\u3059\u308b\u5185\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u306b\u4fdd\u5b58\u3055\u308c\u3066\u3044\u308b\u30d5\u30a1\u30a4\u30eb\u3082\u524a\u9664\u3055\u308c\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u4e00\u90e8\u306e\u30e6\u30fc\u30b6\u30fc\u306fAndroid\u306e\u7aef\u672b\u3092\u30eb\u30fc\u30c8\u5316\u3057\u3066\u304a\u308a\u3001\u30b9\u30fc\u30d1\u30fc\u30e6\u30fc\u30b6\u30fc\u30a2\u30af\u30bb\u30b9\u3092\u53d6\u5f97\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u3001\u671b\u3080\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u66f8\u304d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>Android\u5185\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u3067\u306e\u30c6\u30ad\u30b9\u30c8\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u8fbc\u307f\u3068\u66f8\u304d\u8fbc\u307f<\/h3>\n<p>Android\u3067\u306f\u3001Java\u306eI\/O\u30af\u30e9\u30b9\u304b\u3089openFileInput\u3068openFileOutput\u3092\u63d0\u4f9b\u3057\u3066\u304a\u308a\u3001\u3053\u308c\u3092\u4f7f\u3063\u3066\u30ed\u30fc\u30ab\u30eb\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u306e\u8aad\u307f\u53d6\u308a\u3084\u66f8\u304d\u8fbc\u307f\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li>openFileOutput(): This method is used to create and save a file. Its syntax is given below:<br \/>\nFileOutputStream fOut = openFileOutput(&#8220;file name&#8221;,Context.MODE_PRIVATE);The method openFileOutput() returns an instance of FileOutputStream. After that we can call write method to write data on the file. Its syntax is given below:<br \/>\nString str = &#8220;test data&#8221;;<br \/>\nfOut.write(str.getBytes());<br \/>\nfOut.close();<\/li>\n<li>openFileInput(): This method is used to open a file and read it. It returns an instance of FileInputStream. Its syntax is given below:<br \/>\nFileInputStream fin = openFileInput(file);After that, we call read method to read one character at a time from the file and then print it. Its syntax is given below:<br \/>\nint c;<br \/>\nString temp=&#8221;&#8221;;<br \/>\nwhile( (c = fin.read()) != -1){<br \/>\ntemp = temp + Character.toString((char)c);<br \/>\n}<\/p>\n<p>fin.close();<\/p>\n<p>In the above code, string temp contains all the data of the file.<\/li>\n<li>Note that these methods do not accept file paths (e.g. path\/to\/file.txt), they just take simple file names.<\/li>\n<\/ul>\n<h3>\u30a2\u30f3\u30c9\u30ed\u30a4\u30c9\u306e\u5185\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u69cb\u9020<\/h3>\n<h3>Android\u306e\u5185\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9<\/h3>\n<p>XML\u306e\u30ec\u30a4\u30a2\u30a6\u30c8\u306b\u306f\u3001\u30d5\u30a1\u30a4\u30eb\u306b\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u3080\u305f\u3081\u306eEditText\u3068\u3001\u66f8\u304d\u8fbc\u307f\u30dc\u30bf\u30f3\u3068\u8aad\u307f\u8fbc\u307f\u30dc\u30bf\u30f3\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001onClick\u30e1\u30bd\u30c3\u30c9\u306fxml\u30d5\u30a1\u30a4\u30eb\u3067\u306e\u307f\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\uff1aactivity_main.xml<\/p>\n<pre class=\"post-pre\"><code>&lt;RelativeLayout xmlns:android=\"https:\/\/schemas.android.com\/apk\/res\/android\"\r\n    xmlns:tools=\"https:\/\/schemas.android.com\/tools\"\r\n    android:layout_width=\"match_parent\"\r\n    android:layout_height=\"match_parent\"\r\n    &gt;\r\n\r\n    &lt;TextView\r\n        android:id=\"@+id\/textView1\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_alignParentLeft=\"true\"\r\n        android:layout_alignParentRight=\"true\"\r\n        android:padding=\"5dp\"\r\n        android:text=\"Android Read and Write Text from\/to a File\"\r\n        android:textStyle=\"bold\"\r\n        android:textSize=\"28sp\" \/&gt;\r\n\r\n    &lt;EditText\r\n        android:id=\"@+id\/editText1\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:layout_alignParentLeft=\"true\"\r\n        android:layout_alignParentRight=\"true\"\r\n        android:layout_below=\"@+id\/textView1\"\r\n        android:layout_marginTop=\"22dp\"\r\n        android:minLines=\"5\"\r\n        android:layout_margin=\"5dp\"&gt;\r\n\r\n        &lt;requestFocus \/&gt;\r\n    &lt;\/EditText&gt;\r\n\r\n    &lt;Button\r\n        android:id=\"@+id\/button1\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:text=\"Write Text into File\"\r\n        android:onClick=\"WriteBtn\"\r\n        android:layout_alignTop=\"@+id\/button2\"\r\n        android:layout_alignRight=\"@+id\/editText1\"\r\n        android:layout_alignEnd=\"@+id\/editText1\" \/&gt;\r\n\r\n    &lt;Button\r\n        android:id=\"@+id\/button2\"\r\n        android:layout_width=\"wrap_content\"\r\n        android:layout_height=\"wrap_content\"\r\n        android:text=\"Read Text From file\"\r\n        android:onClick=\"ReadBtn\"\r\n        android:layout_centerVertical=\"true\"\r\n        android:layout_alignLeft=\"@+id\/editText1\"\r\n        android:layout_alignStart=\"@+id\/editText1\" \/&gt;\r\n\r\n&lt;\/RelativeLayout&gt;\r\n<\/code><\/pre>\n<p>MainActivity\u306b\u306f\u3001\u4e0a\u8a18\u3067\u8aac\u660e\u3055\u308c\u305f\u30d5\u30a1\u30a4\u30eb\u3078\u306e\u8aad\u307f\u66f8\u304d\u306e\u5b9f\u88c5\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.scdev.internalstorage;\r\n\r\n\r\nimport android.os.Bundle;\r\nimport android.app.Activity;\r\nimport android.view.View;\r\nimport android.widget.EditText;\r\nimport android.widget.Toast;\r\nimport java.io.FileInputStream;\r\nimport java.io.FileOutputStream;\r\nimport java.io.InputStreamReader;\r\nimport java.io.OutputStreamWriter;\r\n\r\npublic class MainActivity extends Activity {\r\n\r\n    EditText textmsg;\r\n    static final int READ_BLOCK_SIZE = 100;\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        textmsg=(EditText)findViewById(R.id.editText1);\r\n    }\r\n\r\n    \/\/ write text to file\r\n    public void WriteBtn(View v) {\r\n        \/\/ add-write text into file\r\n        try {\r\n            FileOutputStream fileout=openFileOutput(\"mytextfile.txt\", MODE_PRIVATE);\r\n            OutputStreamWriter outputWriter=new OutputStreamWriter(fileout);\r\n            outputWriter.write(textmsg.getText().toString());\r\n            outputWriter.close();\r\n\r\n            \/\/display file saved message\r\n            Toast.makeText(getBaseContext(), \"File saved successfully!\",\r\n                    Toast.LENGTH_SHORT).show();\r\n\r\n        } catch (Exception e) {\r\n            e.printStackTrace();\r\n        }\r\n    }\r\n\r\n    \/\/ Read text from file\r\n    public void ReadBtn(View v) {\r\n        \/\/reading text from file\r\n        try {\r\n            FileInputStream fileIn=openFileInput(\"mytextfile.txt\");\r\n            InputStreamReader InputRead= new InputStreamReader(fileIn);\r\n\r\n            char[] inputBuffer= new char[READ_BLOCK_SIZE];\r\n            String s=\"\";\r\n            int charRead;\r\n\r\n            while ((charRead=InputRead.read(inputBuffer))&gt;0) {\r\n                \/\/ char to string conversion\r\n                String readstring=String.copyValueOf(inputBuffer,0,charRead);\r\n                s +=readstring;\r\n            }\r\n            InputRead.close();\r\n            textmsg.setText(s);\r\n            \r\n\r\n        } catch (Exception e) {\r\n            e.printStackTrace();\r\n        }\r\n    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Shared Preferences Internal S [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-727","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u30a2\u30f3\u30c9\u30ed\u30a4\u30c9\u306e\u5185\u90e8\u30b9\u30c8\u30ec\u30fc\u30b8\u306e\u4f8b\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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