Android实现检查并下载APK更新、安装APK及获取网络信息的方法
2023-06-13 09:15:39 时间
本文所述实例为一个天气预报中的android代码,主要包括了下载和安装APK、检查Apk更新、显示"已经是最新"或者"无法获取版本信息"对话框、获取当前客户端版本信息、显示版本更新通知对话框、显示下载对话框、判断是否挂载了SD卡、显示文件大小格式:2个小数点显示等。具体实现代码如下:
importjava.io.ByteArrayInputStream; importjava.io.File; importjava.io.FileOutputStream; importjava.io.IOException; importjava.io.InputStream; importjava.net.HttpURLConnection; importjava.net.MalformedURLException; importjava.net.URL; importjava.text.DecimalFormat; importorg.apache.http.HttpEntity; importorg.apache.http.HttpResponse; importorg.apache.http.client.methods.HttpGet; importorg.apache.http.conn.ConnectTimeoutException; importorg.apache.http.impl.client.DefaultHttpClient; importorg.apache.http.params.CoreConnectionPNames; importorg.apache.http.util.EntityUtils; importorg.lmw.weather.R; importorg.lmw.weather.entity.AppDetail; importandroid.app.AlertDialog; importandroid.app.Dialog; importandroid.app.ProgressDialog; importandroid.app.AlertDialog.Builder; importandroid.content.Context; importandroid.content.DialogInterface; importandroid.content.Intent; importandroid.content.DialogInterface.OnCancelListener; importandroid.content.DialogInterface.OnClickListener; importandroid.content.pm.PackageInfo; importandroid.content.pm.PackageManager.NameNotFoundException; importandroid.net.Uri; importandroid.os.Environment; importandroid.os.Handler; importandroid.os.Message; importandroid.view.LayoutInflater; importandroid.view.View; importandroid.widget.ProgressBar; importandroid.widget.TextView; importandroid.widget.Toast; publicclassDownloadManager{ privatestaticfinalintDOWN_NOSDCARD=0; privatestaticfinalintDOWN_UPDATE=1; privatestaticfinalintDOWN_OVER=2; privatestaticfinalintDOWN_ERROR=3; privatestaticfinalintDIALOG_TYPE_LATEST=0; privatestaticfinalintDIALOG_TYPE_FAIL=1; privatestaticfinalintDIALOG_TYPE_INTERNETERROR=2; privatestaticDownloadManagerdownloadManager; privateContextmContext; //通知对话框 privateDialognoticeDialog; //下载对话框 privateDialogdownloadDialog; //进度条 privateProgressBarmProgress; //显示下载数值 privateTextViewmProgressText; //查询动画 privateProgressDialogmProDialog; //"已经是最新"或者"无法获取最新版本"的对话框 privateDialoglatestOrFailDialog; //返回的安装包url privateStringapkUrl=""; //进度值 privateintprogress; //下载线程 privateThreaddownLoadThread; //终止标记 privatebooleaninterceptFlag; //提示语 privateStringupdateMsg=""; //下载包保存路径 privateStringsavePath=""; //apk保存完整路径 privateStringapkFilePath=""; //临时下载文件路径 privateStringtmpFilePath=""; //下载文件大小 privateStringapkFileSize; //已下载文件大小 privateStringtmpFileSize; privateStringcurVersionName=""; privateintcurVersionCode; privateAppDetailmDownload; privateStringcheckUrl="http://192.168.0.133:8080/lmw/androidMarket/SimpleWeather-20130701093349937/update.xml"; privateHandlermHandler=newHandler(){ publicvoidhandleMessage(Messagemsg){ switch(msg.what){ caseDOWN_UPDATE: mProgress.setProgress(progress); mProgressText.setText(tmpFileSize+"/"+apkFileSize); break; caseDOWN_OVER: downloadDialog.dismiss(); installApk(); break; caseDOWN_NOSDCARD: downloadDialog.dismiss(); Toast.makeText(mContext,"无法下载安装文件,请检查SD卡是否挂载",Toast.LENGTH_SHORT).show(); break; caseDOWN_ERROR: downloadDialog.dismiss(); if(msg.arg1==0){ Toast.makeText(mContext,"网络不给力啊",Toast.LENGTH_SHORT).show(); }elseif(msg.arg1==1||msg.arg1==2){ Toast.makeText(mContext,"未找到资源",Toast.LENGTH_SHORT).show(); } break; } }; }; publicstaticDownloadManagergetDownloadManager(){ if(downloadManager==null){ downloadManager=newDownloadManager(); } downloadManager.interceptFlag=false; returndownloadManager; } publicvoidDownLoader(Contextcontext,AppDetaildownload){ this.mContext=context; this.mDownload=download; showDownloadDialog(); } /** *检查App更新 *@paramcontext *@paramisShowMsg *是否显示提示消息 */ publicvoidcheckAppUpdate(Contextcontext,finalbooleanisShowMsg,finalbooleannotmain){ this.mContext=context; getCurrentVersion(mContext); if(isShowMsg){ if(mProDialog==null) mProDialog=ProgressDialog.show(mContext,null,"正在检测,请稍后...",true,true); elseif(mProDialog.isShowing()||(latestOrFailDialog!=null&&latestOrFailDialog.isShowing())) return; } finalHandlerhandler=newHandler(){ publicvoidhandleMessage(Messagemsg){ //进度条对话框不显示-检测结果也不显示 if(mProDialog!=null&&!mProDialog.isShowing()){ return; } //关闭并释放释放进度条对话框 if(isShowMsg&&mProDialog!=null){ mProDialog.dismiss(); mProDialog=null; } //显示检测结果 if(msg.what==1){ mDownload=(AppDetail)msg.obj; if(mDownload!=null){ if(curVersionCode<mDownload.getVersionCode()){ apkUrl=mDownload.getUri()+mDownload.getFileName(); updateMsg=mDownload.getAppHistory(); showNoticeDialog(); }elseif(isShowMsg){ if(notmain){ showLatestOrFailDialog(DIALOG_TYPE_LATEST); } } } }elseif(msg.what==-1&&isShowMsg){ showLatestOrFailDialog(DIALOG_TYPE_INTERNETERROR); }elseif(isShowMsg){ showLatestOrFailDialog(DIALOG_TYPE_FAIL); } } }; newThread(){ publicvoidrun(){ Messagemsg=newMessage(); try{ DefaultHttpClientclient=newDefaultHttpClient(); client.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,3000); HttpGetget=newHttpGet(checkUrl); HttpResponseresponse=client.execute(get); if(response.getStatusLine().getStatusCode()==200){ HttpEntityentity=response.getEntity(); InputStreamstream=newByteArrayInputStream(EntityUtils.toString(entity,"gb2312").getBytes()); AppDetailupdate=AppDetail.parseXML(stream); msg.what=1; msg.obj=update; }else{ msg.what=-1; } }catch(Exceptione){ e.printStackTrace(); msg.what=-1; } handler.sendMessage(msg); } }.start(); } /*显示"已经是最新"或者"无法获取版本信息"对话框*/ privatevoidshowLatestOrFailDialog(intdialogType){ StringToastMsg=""; if(latestOrFailDialog!=null){ //关闭并释放之前的对话框 latestOrFailDialog.dismiss(); latestOrFailDialog=null; } //AlertDialog.Builderbuilder=newBuilder(mContext); //builder.setTitle("系统提示"); if(dialogType==DIALOG_TYPE_LATEST){ //builder.setMessage("您当前已经是最新版本"); ToastMsg="您当前已经是最新版本"; }elseif(dialogType==DIALOG_TYPE_FAIL){ //builder.setMessage("无法获取版本更新信息"); ToastMsg="无法获取版本更新信息"; }elseif(dialogType==DIALOG_TYPE_INTERNETERROR){ //builder.setMessage("网络故障,无法连接服务器"); ToastMsg="网络故障,无法连接服务器"; } Toast.makeText(mContext,ToastMsg,Toast.LENGTH_SHORT).show(); } /*获取当前客户端版本信息*/ publicStringgetCurrentVersion(Contextcontext){ try{ PackageInfoinfo=context.getPackageManager().getPackageInfo(context.getPackageName(),0); curVersionName=info.versionName; curVersionCode=info.versionCode; }catch(NameNotFoundExceptione){ e.printStackTrace(System.err); } returncurVersionName; } /*显示版本更新通知对话框*/ privatevoidshowNoticeDialog(){ AlertDialog.Builderbuilder=newBuilder(mContext); builder.setTitle("软件版本更新"); builder.setMessage(updateMsg); builder.setPositiveButton("立即更新",newOnClickListener(){ @Override publicvoidonClick(DialogInterfacedialog,intwhich){ dialog.dismiss(); showDownloadDialog(); } }); builder.setNegativeButton("以后再说",newOnClickListener(){ @Override publicvoidonClick(DialogInterfacedialog,intwhich){ dialog.dismiss(); } }); noticeDialog=builder.create(); noticeDialog.show(); } /*显示下载对话框*/ privatevoidshowDownloadDialog(){ AlertDialog.Builderbuilder=newBuilder(mContext); builder.setTitle("正在下载安装包"); finalLayoutInflaterinflater=LayoutInflater.from(mContext); Viewv=inflater.inflate(R.layout.download_progress,null); mProgress=(ProgressBar)v.findViewById(R.id.update_progress); mProgressText=(TextView)v.findViewById(R.id.update_progress_text); builder.setView(v); builder.setNegativeButton("取消",newOnClickListener(){ @Override publicvoidonClick(DialogInterfacedialog,intwhich){ dialog.dismiss(); interceptFlag=true; } }); builder.setOnCancelListener(newOnCancelListener(){ @Override publicvoidonCancel(DialogInterfacedialog){ dialog.dismiss(); interceptFlag=true; } }); downloadDialog=builder.create(); downloadDialog.setCanceledOnTouchOutside(false); downloadDialog.show(); downloadApk(); } privateRunnablemdownApkRunnable=newRunnable(){ Messageerror_msg=newMessage(); @Override publicvoidrun(){ try{ StringapkName=mDownload.getFileName().replace(".apk","")+".apk"; StringtmpApk=mDownload.getFileName().replace(".apk","")+".tmp"; //判断是否挂载了SD卡 StringstorageState=Environment.getExternalStorageState(); if(storageState.equals(Environment.MEDIA_MOUNTED)){ savePath=Environment.getExternalStorageDirectory().getAbsolutePath()+"/QN/QNStore/"; Filefile=newFile(savePath); if(!file.exists()){ file.mkdirs(); } apkFilePath=savePath+apkName; tmpFilePath=savePath+tmpApk; } //没有挂载SD卡,无法下载文件 if(apkFilePath==null||apkFilePath==""){ mHandler.sendEmptyMessage(DOWN_NOSDCARD); return; } FileApkFile=newFile(apkFilePath); //是否已下载更新文件 //if(ApkFile.exists()){ //downloadDialog.dismiss(); //installApk(); //return; //} //输出临时下载文件 FiletmpFile=newFile(tmpFilePath); FileOutputStreamfos=newFileOutputStream(tmpFile); URLurl=newURL(mDownload.getUri()+mDownload.getFileName()); HttpURLConnectionconn=(HttpURLConnection)url.openConnection(); try{ conn.connect(); }catch(ConnectTimeoutExceptione){ error_msg.what=DOWN_ERROR; error_msg.arg1=0; mHandler.sendMessage(error_msg); } intlength=conn.getContentLength(); InputStreamis=conn.getInputStream(); //显示文件大小格式:2个小数点显示 DecimalFormatdf=newDecimalFormat("0.00"); //进度条下面显示的总文件大小 apkFileSize=df.format((float)length/1024/1024)+"MB"; intcount=0; bytebuf[]=newbyte[1024]; do{ intnumread=is.read(buf); count+=numread; //进度条下面显示的当前下载文件大小 tmpFileSize=df.format((float)count/1024/1024)+"MB"; //当前进度值 progress=(int)(((float)count/length)*100); //更新进度 mHandler.sendEmptyMessage(DOWN_UPDATE); if(numread<=0){ //下载完成-将临时下载文件转成APK文件 if(tmpFile.renameTo(ApkFile)){ //通知安装 mHandler.sendEmptyMessage(DOWN_OVER); } break; } fos.write(buf,0,numread); }while(!interceptFlag);//点击取消就停止下载 fos.close(); is.close(); }catch(MalformedURLExceptione){ error_msg.what=DOWN_ERROR; error_msg.arg1=1; mHandler.sendMessage(error_msg); e.printStackTrace(); }catch(IOExceptione){ error_msg.what=DOWN_ERROR; error_msg.arg1=2; mHandler.sendMessage(error_msg); e.printStackTrace(); } } }; /** *下载apk *@paramurl */ privatevoiddownloadApk(){ downLoadThread=newThread(mdownApkRunnable); downLoadThread.start(); } /** *安装apk *@paramurl */ privatevoidinstallApk(){ Fileapkfile=newFile(apkFilePath); if(!apkfile.exists()){ return; } Intenti=newIntent(Intent.ACTION_VIEW); i.setDataAndType(Uri.parse("file://"+apkfile.toString()),"application/vnd.android.package-archive"); mContext.startActivity(i); } }
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