Android应用程序更新并下载实例
程序员文章站
2023-12-30 21:52:34
整理文档,搜刮出一个android应用程序更新并下载实例的代码,稍微整理精简一下做下分享。
创建一个新类,名为updatemanager,代码如下:
imp...
整理文档,搜刮出一个android应用程序更新并下载实例的代码,稍微整理精简一下做下分享。
创建一个新类,名为updatemanager,代码如下:
import java.io.bufferedreader; import java.io.file; import java.io.fileoutputstream; import java.io.ioexception; import java.io.inputstream; import java.io.inputstreamreader; import java.net.httpurlconnection; import java.net.malformedurlexception; import java.net.url; import com.af.mobile.r; import android.app.alertdialog; import android.app.dialog; import android.app.alertdialog.builder; import android.content.context; import android.content.dialoginterface; import android.content.intent; import android.content.dialoginterface.onclicklistener; import android.content.pm.packagemanager.namenotfoundexception; import android.net.uri; import android.os.environment; import android.os.handler; import android.os.message; import android.view.layoutinflater; import android.view.view; import android.widget.progressbar; import android.widget.toast; public class updatemanager {private url url=null; /* 下载中 */ private static final int download = 1; /* 下载结束 */ private static final int download_finish = 2; /* 保存解析的xml信息 */ //hashmap<string, string> mhashmap; /* 下载保存路径 */ private string msavepath; /* 记录进度条数量 */ private int progress; /* 是否取消更新 */ private boolean cancelupdate = false; private context mcontext; /* 更新进度条 */ private progressbar mprogress; private dialog mdownloaddialog; private handler mhandler = new handler() { public void handlemessage(message msg) { switch (msg.what) { // 正在下载 case download: // 设置进度条位置 mprogress.setprogress(progress); break; case download_finish: // 安装文件 installapk(); break; default: break; } }; }; public updatemanager(context context) { this.mcontext = context; } public void checkupdate() { if (isupdate()) { shownoticedialog(); } else { } } /** * 检查软件是否有更新版本 * * @return */ private boolean isupdate() { // 获取当前软件版本 double versioncode = getversioncode(mcontext); double servicecode = 1.2; // 版本判断 if (servicecode > versioncode) { return true; } return false; } // 获取软件版本号 private double getversioncode(context context) { double versioncode = 0.0; try { // 获取软件版本号,对应androidmanifest.xml下android:versioncode versioncode = (double) context.getpackagemanager().getpackageinfo("com.af.mobile", 0).versioncode; } catch (namenotfoundexception e) { e.printstacktrace(); } return versioncode; } //显示软件更新对话框 private void shownoticedialog() { alertdialog.builder builder = new builder(mcontext); builder.settitle("软件更新"); string string=download("http://192.168.0.102:9313/daojuserver/uploads/version.xml");//xml的下载地址 builder.setmessage(string); builder.setpositivebutton("更新", new onclicklistener() { @override public void onclick(dialoginterface dialog, int which) { dialog.dismiss(); // 显示下载对话框 showdownloaddialog(); } }); // 稍后更新 builder.setnegativebutton("稍后更新", new onclicklistener() { @override public void onclick(dialoginterface dialog, int which) { dialog.dismiss(); } }); dialog noticedialog = builder.create(); noticedialog.show(); } // 显示软件下载对话框 private void showdownloaddialog() { // 构造软件下载对话框 alertdialog.builder builder = new builder(mcontext); builder.settitle("djfkjd");//提示信息内容 // 给下载对话框增加进度条 final layoutinflater inflater = layoutinflater.from(mcontext); view v = inflater.inflate(r.layout.softupdate_progress, null); mprogress = (progressbar) v.findviewbyid(r.id.update_progress); builder.setview(v); // 取消更新 builder.setnegativebutton("取消更新", new onclicklistener() { @override public void onclick(dialoginterface dialog, int which) { dialog.dismiss(); // 设置取消状态 cancelupdate = true; } }); mdownloaddialog = builder.create(); mdownloaddialog.show(); // 现在文件 downloadapk(); } private void downloadapk() { // 启动新线程下载软件 new downloadapkthread().start(); } private class downloadapkthread extends thread { @override public void run() { try { // 判断sd卡是否存在,并且是否具有读写权限 if (environment.getexternalstoragestate().equals(environment.media_mounted)) { // 获得存储卡的路径 string sdpath = environment.getexternalstoragedirectory() + "/"; msavepath = sdpath + "download"; url url = new url("http://192.168.0.102:9313/daojuserver/uploads/spmobile.apk");//apk下载地址地址 // 创建连接 httpurlconnection conn = (httpurlconnection) url.openconnection(); conn.connect(); // 获取文件大小 int length = conn.getcontentlength(); // 创建输入流 inputstream is = conn.getinputstream(); file file = new file(msavepath); if (!file.exists()) { file.mkdir(); } file apkfile = new file(msavepath, "dhfudh"); fileoutputstream fos = new fileoutputstream(apkfile); int count = 0; // 缓存 byte buf[] = new byte[1024]; // 写入到文件中 do { int numread = is.read(buf); count += numread; // 计算进度条位置 progress = (int) (((float) count / length) * 100); // 更新进度 mhandler.sendemptymessage(download); if (numread <= 0) { mhandler.sendemptymessage(download_finish); break; } fos.write(buf, 0, numread); } while (!cancelupdate); fos.close(); is.close(); } } catch (malformedurlexception e) { e.printstacktrace(); } catch (ioexception e) { e.printstacktrace(); } // 取消下载对话框显示 mdownloaddialog.dismiss(); } }; private void installapk() { file apkfile = new file(msavepath, "dhfudh"); if (!apkfile.exists()) { return; } // 通过intent安装apk文件 intent i = new intent(intent.action_view); i.setdataandtype(uri.parse("file://" + apkfile.tostring()), "application/vnd.android.package-archive"); mcontext.startactivity(i); } public string download(string urlstring) { stringbuffer sbbuffer=new stringbuffer(); string line=null; bufferedreader buffer=null; try { url=new url(urlstring); httpurlconnection urlconn=(httpurlconnection) url.openconnection(); buffer=new bufferedreader(new inputstreamreader(urlconn.getinputstream())); while((line=buffer.readline())!=null) { sbbuffer.append(line); } } catch (exception e) { // todo: handle exception e.printstacktrace(); } finally { try { buffer.close(); } catch (exception e2) { // todo: handle exception e2.printstacktrace(); } } return sbbuffer.tostring(); } }
在android应用程序main界面
if(isopennetwork())//判断是否有网络 { updatemanager manager = new updatemanager(main.this); // 检查软件更新 manager.checkupdate(); }
判断移动端是否有网络
private boolean isopennetwork() { connectivitymanager connmanager = (connectivitymanager) getsystemservice(context.connectivity_service); networkinfo networkinfo = connmanager.getactivenetworkinfo(); if (networkinfo != null) { // 2.获取当前网络连接的类型信息 int networktype = networkinfo.gettype(); if (connectivitymanager.type_wifi == networktype) { // 当前为wifi网络 } else if (connectivitymanager.type_mobile == networktype) { // 当前为mobile网络 } return connmanager.getactivenetworkinfo().isavailable(); } return false; }
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。