前言

项目地址：UpdateAppDemo

现在的android应用app会隔一段时间发布一个新的版本，当你打开某个app，如果有最新的版本，会提醒你是否下载更新。本文利用android自带的下载管理器DownloadManager进行下载最新版本的apk，下载完成后自动跳转安装。效果如下：

第一步、检查版本并判断是否需要更新

通过获取当前app版本号与服务器上的版本号进行对比，如果本地的版本号低于服务器版本号，则弹出提示框：发现新版本，是否下载更新。

/** * Created by Teprinciple on 2016/11/15. */public class UpdateAppUtil { /** * 获取当前apk的版本号 currentVersionCode * @param ctx * @return */ public static int getAPPLocalVersion(Context ctx) { int currentVersionCode = 0; PackageManager manager = ctx.getPackageManager(); try { PackageInfo info = manager.getPackageInfo(ctx.getPackageName(), 0); String appVersionName = info.versionName; // 版本名 currentVersionCode = info.versionCode; // 版本号 } catch (PackageManager.NameNotFoundException e) { e.printStackTrace(); } return currentVersionCode; } /** * 获取服务器上版本信息 * @param context * @param callBack */ public static void getAPPServerVersion(Context context, final VersionCallBack callBack){ HttpUtil.getObject(Api.GETVERSION.mapClear().addBody(), VersionInfo.class, new HttpUtil.ObjectCallback() { @Override public void result(boolean b, @Nullable Object obj) { if (b){ callBack.callBack((VersionInfo) obj); } } }); } /** * 判断版本号，更新APP * @param context */ public static void updateApp(final Context context){ getAPPServerVersion(context, new VersionCallBack() { @Override public void callBack(final VersionInfo info) { if (info != null && info.getVersionCode()!=null){ Log.i("this","版本信息：当前"+getAPPLocalVersion(context)+",服务器："+Integer.valueOf(info.getVersionCode())); if (Integer.valueOf(info.getVersionCode()) > getAPPLocalVersion(context)){ ConfirmDialog dialog = new ConfirmDialog(context, new lht.wangtong.gowin120.doctor.views.feature.Callback() { @Override public void callback() { DownloadAppUtils.downloadForAutoInstall(context, Api.HOST_IMG+info.getLoadPath(), "demo.apk", "更新demo"); } }); dialog .setContent("发现新版本:"+info.getVersionNumber()+"\n是否下载更新?"); dialog.setCancelable(false); dialog .show(); } } } }); } public interface VersionCallBack{ void callBack(VersionInfo info); }}

第二步、下载最新版apk

通过Android自带的DownloadManager下载管理器，下载服务器上最新版的apk。下载完成后会发送下载完成的广播。

/** * Created by Teprinciple on 2016/11/15. */public class DownloadAppUtils { private static final String TAG = DownloadAppUtils.class.getSimpleName(); public static long downloadUpdateApkId = -1;//下载更新Apk 下载任务对应的Id public static String downloadUpdateApkFilePath;//下载更新Apk 文件路径 /** * 通过浏览器下载APK包 * @param context * @param url */ public static void downloadForWebView(Context context, String url) { Uri uri = Uri.parse(url); Intent intent = new Intent(Intent.ACTION_VIEW, uri); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setDataAndType(Uri.fromFile(new File(Environment .getExternalStorageDirectory(), "tmp.apk")), "application/vnd.android.package-archive"); context.startActivity(intent); } /** * 下载更新apk包 * 权限:1,<uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" /> * @param context * @param url */ public static void downloadForAutoInstall(Context context, String url, String fileName, String title) { //LogUtil.e("App 下载 url="+url+",fileName="+fileName+",title="+title); if (TextUtils.isEmpty(url)) { return; } try { Uri uri = Uri.parse(url); DownloadManager downloadManager = (DownloadManager) context .getSystemService(Context.DOWNLOAD_SERVICE); DownloadManager.Request request = new DownloadManager.Request(uri); //在通知栏中显示 request.setVisibleInDownloadsUi(true); request.setTitle(title); String filePath = null; if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {//外部存储卡 filePath = Environment.getExternalStorageDirectory().getAbsolutePath(); } else { T.showShort(context, R.string.download_sdcard_error); return; } downloadUpdateApkFilePath = filePath + File.separator + fileName; // 若存在，则删除 deleteFile(downloadUpdateApkFilePath); Uri fileUri = Uri.parse("file://" + downloadUpdateApkFilePath); request.setDestinationUri(fileUri); downloadUpdateApkId = downloadManager.enqueue(request); } catch (Exception e) { e.printStackTrace(); downloadForWebView(context, url); } } private static boolean deleteFile(String fileStr) { File file = new File(fileStr); return file.delete(); }}

注意添加权限：

<uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />

第三步、下载完成后跳转安装

通过广播接收者，接收到下载完成后发出的广播，跳转到系统的安装界面，进行安装。

/** * Created by Teprinciple on 2016/11/15. */public class UpdateAppReceiver extends BroadcastReceiver { public UpdateAppReceiver() { } @Override public void onReceive(Context context, Intent intent) { // 处理下载完成 Cursor c=null; try { if (DownloadManager.ACTION_DOWNLOAD_COMPLETE.equals(intent.getAction())) { if (DownloadAppUtils.downloadUpdateApkId >= 0) { long downloadId = DownloadAppUtils.downloadUpdateApkId; DownloadManager.Query query = new DownloadManager.Query(); query.setFilterById(downloadId); DownloadManager downloadManager = (DownloadManager) context .getSystemService(Context.DOWNLOAD_SERVICE); c = downloadManager.query(query); if (c.moveToFirst()) { int status = c.getInt(c .getColumnIndex(DownloadManager.COLUMN_STATUS)); if (status == DownloadManager.STATUS_FAILED) { downloadManager.remove(downloadId); } else if (status == DownloadManager.STATUS_SUCCESSFUL) { if (DownloadAppUtils.downloadUpdateApkFilePath != null) { Intent i = new Intent(Intent.ACTION_VIEW); i.setDataAndType( Uri.parse("file://" + DownloadAppUtils.downloadUpdateApkFilePath), "application/vnd.android.package-archive"); i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); context.startActivity(i); } } } } } } catch (Exception e) { e.printStackTrace(); }finally { if (c != null) { c.close(); } } }}

注意需要在AndroidMainfest.xml中注册receiver：

<receiver android:name=".updateapp.UpdateAppReceiver" android:enabled="true" android:exported="true"> <intent-filter> <action android:name="android.intent.action.DOWNLOAD_COMPLETE" /> <action android:name="android.intent.action.DOWNLOAD_NOTIFICATION_CLICKED"/> </intent-filter></receiver>

通过上面三步就可以快速实现APP的在线更新 。

项目地址：UpdateAppDemo

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。