//主要方法public void downloadApk(String downloadUrl) {clearApk(getString(R.string.app_name) + ".apk");//TODO 1.封裝下載請求DownloadManager.Request request = new DownloadManager.Request(Uri.parse(downloadUrl));request.setMimeType("application/vnd.android.package-archive");// //TODO 2.下載標題，描述request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);request.setTitle(getString(R.string.app_name));request.setDescription(getString(R.string.app_name) + "下載");// TODO 3.設置下載文件的保存位置request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, getString(R.string.app_name) + ".apk");// TODO 4.獲取下載管理器服務的實例, 添加下載任務DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);manager.enqueue(request);// 將下載請求加入下載隊列, 返回一個下載ID} //清除重復的Apk防止重復下載public static File clearApk(String apkName) {File apkFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), apkName);if (apkFile.exists()) {apkFile.delete();}return apkFile;}

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