Update

Use system app update

调用系统更新app包，实现断点续传，后台自动下载，下拉栏显示进度，下载直接完毕自动跳转到安装页面,记录跳过更新版本等功能。由于下载页面是dialog自己定义，可根据需求调整。

为了使代码结构清晰，降低耦合，主要实现代码在独立模块systemupdate中实现，MainActivity只实现传值的初始化工作。

#Maven库引用 compile 'com.cnhubei.systemupdate:systemupdate:1.0.0'

dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) compile 'com.cnhubei.systemupdate:systemupdate:1.0.0' }

#MainActivity中初始化代码

VersionBean bean = new VersionBean("8.9.9","http://10.99.101.4/1616v3.0.2xin.apk ", "app测试2", 0, 90000000); bean.setCheckUpdater(false); VersionManager.VersionCheck(MainActivity.this, bean);

#主要使用了DownloadManager

DownloadManager API:http://android-doc.com/reference/android/app/DownloadManager.html

DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url)); //设置在什么网络情况下进行下载 request.setAllowedNetworkTypes(request.NETWORK_WIFI); //设置通知栏标题 request.setNotificationVisibility(request.VISIBILITY_VISIBLE); request.setTitle("动向新闻海外版下载"); request.setMimeType("application/vnd.android.package-archive"); request.setAllowedOverRoaming(false); saveSimpleCacheObject(url); String path = Environment.DIRECTORY_DOWNLOADS; String app = url.substring(url.lastIndexOf("/") + 1);

    File file = new File(path, app);
    try{
        //修改data/data目录权限
        if(file.getAbsolutePath().indexOf("data/data/")>-1){
            String[] command = {"chmod", "755", file.getAbsolutePath()};
            ProcessBuilder builder = new ProcessBuilder(command);
            builder.start();
        }
    }catch (Exception e){
        e.printStackTrace();
    }

    //设置文件存放目录
    request.setDestinationInExternalPublicDir(path, app);
    downManager = (DownloadManager)this.getSystemService(Context.DOWNLOAD_SERVICE);
    downManager.enqueue(request);

有不足的地方，请多指教与讨论！