Android不使用第三方升级库实现应用升级
16lz
2021-01-26
现在很多第三方都提供应用升级的集成，可能只需要把jar包导入，然后加入几行代码就可以了，但是这样的使用不利于我们对Android的理解。废话不多说，先讲讲怎么实现吧！
1、检查版本号
获取本地版本号:
public static String getVersionCode(Context context){ PackageManager packageManager = context.getPackageManager();//获取包管理器，用于后面获取应用信息 try { PackageInfo packageInfo = packageManager.getPackageInfo(context.getPackageName(), 0);//获取本应用信息 return packageInfo.versionCode+""; } catch (NameNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } return ""; }获取网络上最新版本号:
//获取最新版本信息，判断是否需要升级public void getCloudVersion(){ new Thread(){ @Override public void run() { // TODO Auto-generated method stub try { URL url = new URL(GlobalURL.QUERYVERSION);//我的应用检查版本的地址Url HttpURLConnection connection = (HttpURLConnection) url.openConnection();//打开一个网络连接 connection.setRequestMethod("POST");//设置请求method为post DataOutputStream out = new DataOutputStream(connection.getOutputStream());//打开一个输出流 out.writeBytes("imei="+CommonUtil.getDeviceID(context)+"&soundNo=1");//需要提交给后台服务器的数据参数之间用&分割 InputStream inputStream = connection.getInputStream();//获取输入流，服务器响应内容 InputStreamReader inputStreamReader = new InputStreamReader(inputStream); bufferedReader = new BufferedReader(inputStreamReader); StringBuilder builder = new StringBuilder();//把输入流包装成字符缓冲输入流，有人可能会问为什么要用buffer，buffer是为了使两个速度差异很大的端之间的交流不会因此而出现问题 String line; while((line=bufferedReader.readLine()) != null){ builder.append(line); } JSONObject jsonObject = new JSONObject(builder.toString()); JSONObject jsonObject1 = jsonObject.getJSONObject("data"); apkUrl = jsonObject1.getString("apkUrl"); version = jsonObject1.getString("version"); content = jsonObject1.getString("content"); if (Integer.parseInt(version)>Integer.parseInt(getVersionCode(context))) { mHandler.sendEmptyMessage(SHOW_DOWNLOAD_DIALOG);//判断到需要升级，则显示升级提示框 }//下面是一个检查最新版本api返回的一个json例子 //{"success":true,"code":"1","data":{"apkUrl":"http://192.168.63.4:8082/orange-web/res/apkfile/1463894203012422.apk","version":1,"content":"更新说明"}} } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } }}.start(); }2、询问是否升级
private Handler mHandler = new Handler(){ public void handleMessage(android.os.Message msg) { switch (msg.what) { case SHOW_DOWNLOAD_DIALOG: showDownloadDialog(); break; default: break; } }};//显示对话框，询问是否更新 public void showDownloadDialog(){ AlertDialog.Builder builder = new AlertDialog.Builder(context); builder.setTitle("检测到新版本 "+version); builder.setMessage(content); builder.setCancelable(false); builder.setPositiveButton("升级",new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub initProgressDialog(); } }); builder.setNegativeButton("暂不升级", new OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { // TODO Auto-generated method stub dialog.dismiss(); } }); builder.show(); } 3、初始化关键控件开始下载更新
//初始化下载进度条 public void initProgressDialog(){ progressDialog = new ProgressDialog(context); progressDialog.setMessage("准备下载..."); progressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); progressDialog.setOnCancelListener(new OnCancelListener() { @Override public void onCancel(DialogInterface dialog) { // TODO Auto-generated method stub httpHandler.cancel(); } }); progressDialog.show(); downloadNewApk(); } //下载更新apk public void downloadNewApk() { HttpUtils httpUtils = new HttpUtils(); httpHandler = httpUtils.download(apkUrl, Environment.getExternalStorageDirectory()+"/Download/tingcheng.apk", new RequestCallBack() { @Override public void onLoading(long total, long current, boolean isUploading) { progressDialog.setMessage("正在下载..."); progressDialog.setProgress((int)current); progressDialog.setMax((int)total); progressDialog.setProgressNumberFormat(current/1024+"K"+"/"+total/1024+"K"); } @Override public void onSuccess(ResponseInfo arg0) { // TODO Auto-generated method stub progressDialog.dismiss(); installAPK(); } @Override public void onFailure(HttpException arg0, String arg1) { // TODO Auto-generated method stub progressDialog.setMessage("下载失败"); } }); }不需要使用第三方的升级库，自己就可以做了 : )
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