Android升级代码

Android升级的代码会涉及不同的部分，以下是一个简单的升级流程：

1. 检查当前设备的Android版本号

int currentVersion = android.os.Build.VERSION.SDK_INT;

2. 获取最新版本的Android系统更新包

3. 下载更新包并保存到本地存储

String downloadUrl = "http://example.com/update.zip";
String destination = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/";
String fileName = "update.zip";
String destinationFilePath = destination + fileName;
File file = new File(destinationFilePath);

DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(downloadUrl));
request.setMimeType("application/vnd.android.package-archive");
request.setDestinationUri(Uri.fromFile(file));
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
downloadManager.enqueue(request);

4. 启动系统更新

Android系统更新是通过Intent来触发的。以下是一个简单的代码示例：

String destinationFilePath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/update.zip";
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(destinationFilePath)), "application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);

以上代码仅供参考，实际情况可能会更复杂。在实际开发中，需要根据具体需求和场景进行调整和完善。