{"id":204915,"date":"2023-08-09T04:16:47","date_gmt":"2023-08-08T20:16:47","guid":{"rendered":"https:\/\/www.idc.net\/help\/204915\/"},"modified":"2023-08-09T04:16:47","modified_gmt":"2023-08-08T20:16:47","slug":"android%e5%bc%80%e5%8f%91%e8%bf%9b%e9%98%b6%ef%bc%9a%e5%a6%82%e4%bd%95%e8%af%bb%e5%86%99android%e6%96%87%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/204915\/","title":{"rendered":"Android\u5f00\u53d1\u8fdb\u9636\uff1a\u5982\u4f55\u8bfb\u5199Android\u6587\u4ef6"},"content":{"rendered":"<p>\u7f16\u8005\u6309\uff1aAndroid\u4e3b\u8981\u6709\u56db\u5927\u4e3b\u8981\u7ec4\u4ef6\u7ec4\u6210\uff1aActivity\u3001ContentProvider\u3001Service\u3001Intent\u7ec4\u6210\u3002Android\u6587\u4ef6\u7684\u8fd0\u884c\u4e3b\u8981\u9700\u8981\u8bfb\u5199\u56db\u5927\u7ec4\u4ef6\u7684\u6587\u4ef6\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u8bfb\u5199Android\u6587\u4ef6\uff0c\u5e0c\u671b\u5bf9\u6b63\u5728\u8fdb\u884cAndroid\u5f00\u53d1\u7684\u670b\u53cb\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<p><span style=\"font-size: smaller\">\u63a8\u8350\u9605\u8bfb\uff1a<\/span><span style=\"font-size: smaller\">Android\u5f00\u53d1\u5e94\u7528\u8be6\u89e3<\/span><\/p>\n<h2>\u6587\u4ef6\u5b58\u653e\u4f4d\u7f6e<\/h2>\n<p>\u5728Android\u4e2d\u6587\u4ef6\u7684I\/O\u662f\u5b58\u653e\u5728\/data\/data\/&lt;package name&gt;\/file\/filename\u76ee\u5f55\u4e0b\u3002<\/p>\n<p>\u63d0\u793a:Android\u662f\u57fa\u4e8elinux\u7cfb\u7edf\u7684\uff0c\u5728linux\u7684\u6587\u4ef6\u7cfb\u7edf\u4e2d\u4e0d\u5b58\u5728\u7c7b\u4f3c\u4e8eWindows\u7684\u78c1\u76d8\u5206\u533a\u73b0\u8c61\uff0c\u5176\u662f\u4ee5\u4e00\u4e2a\u6b63\u659c\u6760\u201c\/\u201d\u5f00\u5934\u3002<\/p>\n<h2>Android\u4e2d\u5f97\u5230\u8f93\u5165\u8f93\u51fa\u6d41<\/h2>\n<p>\u5728Android\u4e2d\uff0c\u5bf9\u4e8e\u6d41\u7684\u64cd\u4f5c\u5341\u5206\u7b80\u5355\u3002\u5728Context\u7c7b\u4e2d\u6709\u5982\u4e0b\u4e24\u4e2a\u65b9\u6cd5\u53ef\u4ee5\u76f4\u63a5\u5f97\u5230\u6587\u4ef6\u8f93\u5165\u8f93\u51fa\u6d41:<\/p>\n<pre>\n \n \n <ol>\n  \n  \n  <li><span><span>public&nbsp;FileInputStream&nbsp;&nbsp;&nbsp;openFileInput&nbsp;&nbsp;(String&nbsp;name) &nbsp;<\/span><\/span><\/li>\n  \n  \n  <li><span>public&nbsp;FileOutputStream&nbsp;&nbsp;&nbsp;openFileOutput&nbsp;&nbsp;(String&nbsp;name,&nbsp;int&nbsp;mode) &nbsp;<\/span><\/li>\n \n \n <\/ol><\/pre>\n<p>\u987e\u540d\u601d\u4e49\uff0c\u901a\u8fc7\u5982\u4e0a\u65b9\u6cd5\u5c31\u53ef\u4ee5\u5f97\u5230\u6587\u4ef6\u8f93\u5165\u8f93\u51fa\u6d41\u3002\u5bf9\u4e8e\u7b2c\u4e8c\u4e2a\u65b9\u6cd5\u4e2d\u7684mode\uff0c\u6709\u5982\u4e0b\u56db\u79cd\u6a21\u5f0f\uff1a<\/p>\n<p>\u25c6Use 0 or MODE_PRIVATE( the default operation) :\u75280\u8868\u793a\u9ed8\u8ba4\u503c\uff0c\u53ea\u80fd\u591f\u521b\u5efa\u6587\u4ef6\u7684\u5e94\u7528\u7a0b\u5e8f\u8bbf\u95ee\u8be5\u6587\u4ef6\uff0c\u6bcf\u6b21\u6587\u4ef6\u5199\u5165\u4e3a\u8986\u76d6\u65b9\u5f0f\u3002<\/p>\n<p>\u25c6MODE_APPEND to append to an existing file: \u6bcf\u6b21\u6587\u4ef6\u5199\u5165\u4e3a\u8ffd\u52a0\u65b9\u5f0f\uff0c\u7c7b\u4f3c\u4e8eStringBuffer\u4e2d\u7684append\uff08\uff09\u65b9\u6cd5\u3002<\/p>\n<p>\u25c6MODE_WORLD_READABLE&nbsp; \uff1a\u53ea\u6709\u8bfb\u6743\u9650\u3002<\/p>\n<p>\u25c6MODE_WORLD_WRITEABLE \uff1a\u53ea\u6709\u5199\u6743\u9650\u3002<\/p>\n<p>\u63d0\u793a\uff1a\u5982\u679c\u60f3\u540c\u65f6\u5f97\u5230\u8bfb\u4e0e\u5199\u7684\u6743\u9650\uff0c\u5219\u53ef\u4ee5\u5728mode\u5904\u901a\u8fc7\u5982\u4e0b\u65b9\u5f0f\u521b\u5efa\uff1a<\/p>\n<pre>\n \n \n <ol>\n  \n  \n  <li><span><span>MODE_WORLD_READABLE+&nbsp;MODE_WORLD_WRITEABLE&nbsp;<\/span><\/span><\/li>\n \n \n <\/ol><\/pre>\n<h2>\u5bf9\u4e8eJava SE\u90e8\u5206\u7684\u8865\u5145<\/h2>\n<p><strong>FileOutputStream\uff1a<\/strong><\/p>\n<p>public void write(byte[] b) throws IOException \u8be5\u65b9\u6cd5\u53ef\u5c06\u6307\u5b9a\u7684\u5b57\u8282\u6570\u7ec4\u5199\u5165\u6587\u4ef6\u8f93\u51fa\u6d41<\/p>\n<p><strong>FileInputStream\uff1a<\/strong><\/p>\n<p>public int read(byte[] b) throws IOException \u4ece\u6b64\u8f93\u5165\u6d41\u4e2d\u5c06\u6700\u591a b.length \u4e2a\u5b57\u8282\u7684\u6570\u636e\u8bfb\u5165\u4e00\u4e2a byte \u6570\u7ec4\u4e2d\u3002\u5728\u67d0\u4e9b\u8f93\u5165\u53ef\u7528\u4e4b\u524d\uff0c\u6b64\u65b9\u6cd5\u5c06\u963b\u585e\u3002<\/p>\n<p>\u5bf9\u4e8e\u8f93\u51fa\u6d41\u76f4\u63a5\u4f7f\u7528write\u65b9\u6cd5\u5373\u53ef\uff0c\u53ef\u53c2\u8003\u5982\u4e0b\u4ee3\u7801\uff1a<\/p>\n<p><strong>Java\u4ee3\u7801 <\/strong><\/p>\n<pre>\n \n \n <ol>\n  \n  \n  <li><span><span>&lt;<\/span><span>span<\/span><span>&nbsp;<\/span><span>style<\/span><span>=<\/span><span>\"white-space:&nbsp;pre;\"<\/span><span>&gt;<\/span><span>&nbsp;&nbsp;&nbsp;&nbsp;<\/span><span>&lt;\/<\/span><span>span<\/span><span>&gt;<\/span><span>\/**&nbsp; &nbsp;<\/span><\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;\u5199\u5165\u6570\u636e&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@param&nbsp;fs&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@param&nbsp;content&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*\/&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;void&nbsp;fileWrite(FileOutputStream&nbsp;fos,String&nbsp;content){&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;byte[]&nbsp;<\/span><span>content<\/span><span>contentByteArray<\/span><span>&nbsp;=&nbsp;content.getBytes();&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;fos.write(contentByteArray);&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;catch&nbsp;(IOException&nbsp;e1)&nbsp;{&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;e1.printStackTrace();&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{\/\/\u5173\u95ed\u6d41&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;fos.close();&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;catch&nbsp;(IOException&nbsp;e)&nbsp;{&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;e.printStackTrace();&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;<\/span><\/li>\n \n \n <\/ol><\/pre>\n<p>\u5bf9\u4e8e\u8f93\u5165\u6d41\uff0c\u51fa\u4e8e\u6027\u80fd\u8003\u8651\uff0c\u53ef\u5148\u4f7f\u7528ByteArrayOutputStream\uff0c\u5411\u5185\u5b58\u4e2d\u521b\u5efa\u4e00\u4e2a\u5b57\u7b26\u6570\u7ec4\uff0c\u5f53\u5c06\u6587\u4ef6\u8bfb\u5b8c\u540e\uff0c\u5728\u8bfb\u5165\uff0c\u53c2\u8003\u5982\u4e0b\u4ee3\u7801\uff1a<\/p>\n<p><strong>Java\u4ee3\u7801 <\/strong><\/p>\n<pre>\n \n \n <ol>\n  \n  \n  <li><span><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;\u8bfb\u6570\u636e&nbsp;&nbsp; &nbsp;<\/span><\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@param&nbsp;fis&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*&nbsp;@return&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*\/&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;public&nbsp;String&nbsp;fileRead(FileInputStream&nbsp;fis){&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ByteArrayOutputStream&nbsp;<\/span><span>baos<\/span><span>&nbsp;=&nbsp;<\/span><span>new<\/span><span>&nbsp;ByteArrayOutputStream();&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;byte[]&nbsp;<\/span><span>buffer<\/span><span>&nbsp;=&nbsp;<\/span><span>new<\/span><span>&nbsp;byte[1024];&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;int&nbsp;<\/span><span>len<\/span><span>&nbsp;=&nbsp;-1;&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;while((<\/span><span>len<\/span><span>=(fis.read(buffer)))&nbsp;!=&nbsp;-1){&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;baos.write(buffer,0,len);&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;catch&nbsp;(IOException&nbsp;e)&nbsp;{&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;e.printStackTrace();&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;String&nbsp;<\/span><span>result<\/span><span>&nbsp;=&nbsp;<\/span><span>new<\/span><span>&nbsp;String(baos.toByteArray());&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>\/\/System.out.println(result);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;try&nbsp;{&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;baos.close();&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;fis.close();&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;catch&nbsp;(IOException&nbsp;e)&nbsp;{&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;e.printStackTrace();&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;result;&nbsp;&nbsp; &nbsp;<\/span><\/li>\n  \n  \n  <li><span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}&nbsp;&nbsp; &nbsp;<\/span><\/li>\n \n \n <\/ol><\/pre>\n<p>ByteArrayOutputStream:\u6b64\u7c7b\u5b9e\u73b0\u4e86\u4e00\u4e2a\u8f93\u51fa\u6d41\uff0c\u5176\u4e2d\u7684\u6570\u636e\u88ab\u5199\u5165\u4e00\u4e2a byte \u6570\u7ec4\u3002<\/p>\n<p>&nbsp;public void write(byte[] b,int off,int len) \u5c06\u6307\u5b9a byte \u6570\u7ec4\u4e2d\u4ece\u504f\u79fb\u91cf off \u5f00\u59cb\u7684 len \u4e2a\u5b57\u8282\u5199\u5165\u6b64 byte \u6570\u7ec4\u8f93\u51fa\u6d41\u3002<\/p>\n<p>\u53ef\u53c2\u8003\u4ee3\u7801\uff1aFileIO \u4ee3\u7801\u4e0b\u8f7d<\/p>\n<p>\u3010\u7f16\u8f91\u63a8\u8350\u3011<\/p>\n<ol>\n<li><font>\u5341\u4e8c\u5f20\u5927\u56fe\u8be6\u89e3\u5982\u4f55\u5728Eclipse\u4e0a\u642d\u5efaAndroid 2.3\u73af\u5883<\/font><\/li>\n<li><font>\u56fe\u8be6\u89e3Android 2.3 SDK\u5b89\u88c5\u6559\u7a0b<\/font><\/li>\n<li>Android\u5e73\u53f0SQLite\u5feb\u901f\u5165\u95e8\u5b9e\u8df5<\/li>\n<li>Android\u5f00\u53d1\u4e2dAsyncTask\u5b9e\u73b0\u5f02\u6b65\u5904\u7406\u4efb\u52a1\u7684\u65b9\u6cd5<\/li>\n<li>Android\u5f00\u53d1\u4e2d\u5b9e\u73b0\u591a\u70b9\u89e6\u6478\u7684\u65b9\u6cd5<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p>\u7f16\u8005\u6309\uff1aAndroid\u4e3b\u8981\u6709\u56db\u5927\u4e3b\u8981\u7ec4\u4ef6\u7ec4\u6210\uff1aActivity\u3001ContentProvider\u3001Service [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[195111],"tags":[],"class_list":["post-204915","post","type-post","status-publish","format-standard","hentry","category-android"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/204915","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=204915"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/204915\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=204915"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=204915"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=204915"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}