\u9700\u6c42\uff1a\u4e0b\u8f7d\u7f51\u7edc\u6587\u4ef6\u5230\u624b\u673aSD\u5361\u4e0a<\/p>\n
\u5728app\u6a21\u5757\u7684build.gradle\u914d\u7f6e<\/p>\n
<\/p>\n
compile 'com.squareup.okhttp3:okhttp:3.4.2'<\/code><\/pre>\n\u5b9e\u73b0\u6e90\u7801<\/p>\n
private static final String fileUrl = "http:\/\/dldir1.qq.com\/weixin\/android\/weixin6331android940.apk";\nprivate static final String fileName = "weixin6331android940.apk";\n\npublic void downloadFile(View view) {\n OkHttpClient client = new OkHttpClient();\n Request request = new Request.Builder().url(fileUrl).build();\n\n client.newCall(request).enqueue(new Callback() {\n @Override\n public void onFailure(Call call, IOException e) {\n Log.i(TAG, "\u8bf7\u6c42\u5931\u8d25: " + e.getLocalizedMessage());\n }\n\n @Override\n public void onResponse(Call call, Response response) throws IOException {\n if (response.isSuccessful()) {\n ResponseBody body = response.body();\n if (body != null) {\n writeFile(body);\n }\n }\n }\n });\n}\n\n\/\/\u4e3b\u7ebf\u7a0b\u66f4\u65b0UI\u8fdb\u5ea6\nprivate Handler handler = new Handler() {\n @Override\n public void handleMessage(Message msg) {\n switch (msg.what) {\n case 1:\n int progress = msg.arg1;\n mProgressBar.setProgress(progress);\n break;\n\n default:\n break;\n }\n }\n};\n\nprivate void writeFile(ResponseBody body) {\n InputStream is = null; \/\/\u7f51\u7edc\u8f93\u5165\u6d41\n FileOutputStream fos = null; \/\/\u6587\u4ef6\u8f93\u51fa\u6d41\n\n is = body.byteStream();\n\n String filePath = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + fileName;\n File file = new File(filePath);\n try {\n fos = new FileOutputStream(file);\n byte[] buffer = new byte[1024];\n int len = 0;\n long totalSize = body.contentLength(); \/\/\u6587\u4ef6\u603b\u5927\u5c0f\n long sum = 0;\n while ((len = is.read(buffer)) != -1) {\n fos.write(buffer, 0, len);\n sum += len;\n int progress = (int) (sum * 1.0f \/ totalSize * 100);\n Message msg = handler.obtainMessage();\n msg.what = 1;\n msg.arg1 = progress;\n handler.sendMessage(msg);\n }\n\n } catch (FileNotFoundException e) {\n e.printStackTrace();\n } catch (IOException e) {\n e.printStackTrace();\n } finally {\n if (is != null) {\n try {\n is.close();\n } catch (IOException e) {\n e.printStackTrace();\n }\n }\n if (fos != null) {\n try {\n fos.close();\n } catch (IOException e) {\n e.printStackTrace();\n }\n }\n }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u9700\u6c42\uff1a\u4e0b\u8f7d\u7f51\u7edc\u6587\u4ef6\u5230\u624b\u673aSD\u5361\u4e0a \u5728app\u6a21\u5757\u7684build.gradle\u914d\u7f6e compile 'co […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[116],"tags":[],"class_list":["post-370","post","type-post","status-publish","format-standard","hentry","category-okhttp"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/370","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=370"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/370\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=370"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=370"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=370"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}