android 应用自身检测版本并下载
16lz
2021-01-23
思路：１在服务器固定目录存放固定的了版本文件；
2.应用请求服务器端的版本文件，判断是否有最新版本；
３.创建下载连接，下载最新apk;
import java.io.File;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlPullParserException;import android.annotation.SuppressLint;import android.app.AlertDialog;import android.app.AlertDialog.Builder;import android.app.DownloadManager;import android.app.DownloadManager.Request;import android.content.BroadcastReceiver;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.IntentFilter;import android.content.pm.PackageInfo;import android.content.pm.PackageManager.NameNotFoundException;import android.database.Cursor;import android.net.Uri;import android.os.Environment;import android.os.Handler;import android.util.Xml;/** * Created by shijian on 15-8-13. * 检查应用版本 */public class CheckVersionUtil { public void checkVersion(Context context) { this.context = context; threadPool.execute(checkVersion); } /** * 检查版本线程 * @author shijian */ Runnable checkVersion = new Runnable() { @Override public void run() { try { //从清单文件中获得当前版本号 PackageInfo info = context.getPackageManager().getPackageInfo("cn.com.shijian.test", 0); float localVersion = Float.valueOf(info.versionName); float serverVersion = 0; //版本文件在服务器上的路径 String versionPath = CommonUtil.prefixUrl + File.separator + context.getString(R.string.apkversionUrl); URL url = new URL(versionPath); HttpURLConnection conn= (HttpURLConnection)url.openConnection(); //读入XML文件输入流 InputStream input = conn.getInputStream(); //解析XML文件 XmlPullParser parser = Xml.newPullParser(); try { parser.setInput(input, "utf-8"); int eventType = parser.getEventType(); while(eventType != XmlPullParser.END_DOCUMENT) { switch (eventType) { case XmlPullParser.START_TAG: //版本 if ("version".equals(parser.getName())) { serverVersion = Float.valueOf(parser.nextText()); } //是否强制更新 if("ismustupdate".equals(parser.getName())){ ismustupdate = parser.nextText(); } if ("description".equals(parser.getName())) { //换行 description = parser.nextText().replace("\\n", "\n"); } break; } eventType = parser.next(); } //如果服务器版本号大于本地版本号 if (serverVersion > localVersion) { boolean post = handler.post(new Runnable() { @Override public void run() { Builder builder = new Builder(context); builder.setTitle("版本升级"); builder.setMessage(description); builder.setPositiveButton("下载最新版", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { downloadApk(); } }); if ("1".equals(ismustupdate)) { builder.setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.dismiss(); } }); } AlertDialog dialog = builder.create(); dialog.show(); } }); //当前版本是最新版 } else if (serverVersion <= localVersion) { if (context.getClass().equals(HomeActivity.class)) { return; } handler.post( new Runnable() { public void run() { AlertDialog.Builder builder = new Builder(context); builder.setTitle("版本升级"); builder.setMessage("已经是最新版本"); AlertDialog dialog = builder.create(); dialog.show(); } }); } } catch (XmlPullParserException e) { e.printStackTrace(); } } catch (NameNotFoundException e) { e.printStackTrace(); } catch (MalformedURLException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { threadPool.shutdown(); } } }; /** * * 点击下载apk * @author shijian * @since 2015-8-13 */ public void downloadApk() { //获得DownloadManager final DownloadManager downloadMgr = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE); //定义下载URI Uri apkLocation = Uri.parse(CommonUtil.prefixUrl + File.separator + context.getString(R.string.apkUrl)); Request request = new Request(apkLocation); //request.setAllowedNetworkTypes(Request.NETWORK_WIFI); request.setTitle("e车问更新"); //如果文件件不存在则建立 File folder = Environment.getExternalStoragePublicDirectory("echewen"); if (folder.exists() && folder.isDirectory()){ } else { folder.mkdirs(); } //如果echewen.apk已经存在删除掉,防止出现多个 File apk = new File(CheckVersionUtil.APK_UPDATE); if (apk.exists()) { apk.delete(); } //保存下载的文件到指定目录下 request.setDestinationInExternalPublicDir("echewen", "echewen.apk"); //该downloadmanager的ID final long ref = downloadMgr.enqueue(request); IntentFilter filter = new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE); BroadcastReceiver receiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { long mRef = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1); if (mRef == ref) { Cursor c = downloadMgr.query(new DownloadManager.Query().setFilterById(mRef)); c.moveToFirst(); String downloadFile = c.getString(c.getColumnIndex(DownloadManager.COLUMN_LOCAL_URI)); Intent installIntent = new Intent(Intent.ACTION_VIEW); installIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); installIntent.setDataAndType(Uri.parse(downloadFile), "application/vnd.android.package-archive");//设置intent的数据类型 context.startActivity(installIntent); } } }; context.registerReceiver(receiver, filter); } //线程池 ExecutorService threadPool = Executors.newCachedThreadPool(); Handler handler = new Handler(); //版本升级说明 String description; //上下文 Context context; String ismustupdate = "0";//0:必须更新；１：不必须 public static final String APK_UPDATE = Environment.getExternalStorageDirectory().getPath() + "/echewen/echewen.apk"; public static final String STORAGE_IMAGE_PATH = Environment.getExternalStorageDirectory().getPath() + "/echewen/apk/";} 更多相关文章
- android通过chmod命令实现文件权限修改
- Android心得3.2--用SAX解析器解析xml文件内容
- 编译FFMpeg的Android版本，并整合到android studio
- Android 用style简化layout布局文件
- 【android】下载大文件保持wifi网络连接
- android 布局文件中控件ID、name标签属性的命名包含“@”、“.”
- android 编译之后的文件系统和内核
- ANDROID版本号和版本名称的重要性介绍
- android：XML文件报错！Incorrect line ending: found carriage retu