Android软件版本更新

转的：适合新手学习，但在实际项目中不可这么做。以下是我转的内容： =================================================================== android download dialog file string buffer

各种平台软件更新做法差不多，大体做法如下：

1.服务器存放一个最新版本的xml文件，或者存在数据库，各种做法都可以。

1.1xml文件存储verCode verName updateUrl等信息

1.2用户安装的软件的verCode和服务器上取得的做比较，检测到版本低就更新

2.下面是Android手机软件版本更新的教程

2.1项目目录

2.2编写UpdateManager类

[java] view plain copy print ?

packagecom.doublejun.update;
importjava.io.File;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.io.InputStream;
importjava.net.HttpURLConnection;
importjava.net.MalformedURLException;
importjava.net.URL;
importandroid.app.AlertDialog;
importandroid.app.AlertDialog.Builder;
importandroid.app.Dialog;
importandroid.content.Context;
importandroid.content.DialogInterface;
importandroid.content.Intent;
importandroid.content.DialogInterface.OnClickListener;
importandroid.content.IntentFilter;
importandroid.net.Uri;
importandroid.os.Handler;
importandroid.os.Message;
importandroid.util.Log;
importandroid.view.LayoutInflater;
importandroid.view.View;
importandroid.widget.ProgressBar;
publicclassUpdateManager{
privateContextmContext;
privatefinalStringupdateMsg="亲，有新版本，快下载吧！";//下载消息提示
privateDialognoticeDialog;//下载提示对话框
privateDialogdownloadDialog;//下载进度对话框
privateProgressBarmProgressBar;//进度条
privateBooleaninterceptFlag=false;//标记用户是否在下载过程中取消下载
privateThreaddownloadApkThread=null;//下载线程
privatefinalStringapkUrl="http://www.ypdm.com/hyjj.apk";//apk的URL地址
privatefinalStringsavePath="/sdcard/UpdateDemo/";//下载的apk存放的路径
privatefinalStringsaveFileName=savePath+"hyjjrelease.apk";//下载的apk文件
privateintprogress=0;//下载进度
privatefinalintDOWNLOAD_ING=1;//标记正在下载
privatefinalintDOWNLOAD_OVER=2;//标记下载完成
privatefinalStringTAG="版本更新";//日志打印标签
privateHandlermhandler=newHandler(){//更新UI的handler
@Override
publicvoidhandleMessage(Messagemsg){
super.handleMessage(msg);
switch(msg.what){
caseDOWNLOAD_ING:
//更新进度条
mProgressBar.setProgress(progress);
break;
caseDOWNLOAD_OVER:
downloadDialog.dismiss();
installApk();
//安装
break;
default:
break;
}
}
};
/*
*构造方法
*/
publicUpdateManager(Contextcontext){
this.mContext=context;
}
/*
*检查是否有需要更新，具体比较版本xml
*/
publicvoidcheckUpdate(){
//到服务器检查软件是否有新版本
//如果有则
showNoticeDialog();
}
/*
*显示版本更新对话框
*/
privatevoidshowNoticeDialog(){
AlertDialog.Builderbuilder=newBuilder(mContext);
builder.setTitle("版本更新");
builder.setMessage(updateMsg);
builder.setPositiveButton("更新",newOnClickListener(){
publicvoidonClick(DialogInterfacedialog,intwhich){
noticeDialog.dismiss();
showDownloadDialog();
}
});
builder.setNegativeButton("以后再说",newOnClickListener(){
publicvoidonClick(DialogInterfacedialog,intwhich){
noticeDialog.dismiss();
}
});
noticeDialog=builder.create();
noticeDialog.show();
}
/*
*弹出下载进度对话框
*/
privatevoidshowDownloadDialog(){
AlertDialog.Builderbuilder=newBuilder(mContext);
builder.setTitle("软件更新");
finalLayoutInflaterinflater=LayoutInflater.from(mContext);
Viewv=inflater.inflate(R.layout.progress,null);
mProgressBar=(ProgressBar)v.findViewById(R.id.updateProgress);
builder.setView(v);
builder.setNegativeButton("取消",newOnClickListener(){
publicvoidonClick(DialogInterfacedialog,intwhich){
downloadDialog.dismiss();
interceptFlag=true;
}
});
downloadDialog=builder.create();
downloadDialog.show();
downloadLatestVersionApk();
}
/*
*下载最新的apk文件
*/
privatevoiddownloadLatestVersionApk(){
downloadApkThread=newThread(downloadApkRunnable);
downloadApkThread.start();
}
//匿名内部类，apk文件下载线程
privateRunnabledownloadApkRunnable=newRunnable(){
publicvoidrun(){
try{
URLurl=newURL(apkUrl);
HttpURLConnectionconn=(HttpURLConnection)url
.openConnection();
conn.connect();
intlength=conn.getContentLength();
Log.e(TAG,"总字节数:"+length);
InputStreamis=conn.getInputStream();
Filefile=newFile(savePath);
if(!file.exists()){
file.mkdir();
}
FileapkFile=newFile(saveFileName);
FileOutputStreamout=newFileOutputStream(apkFile);
intcount=0;
intreadnum=0;
byte[]buffer=newbyte[1024];
do{
readnum=is.read(buffer);
count+=readnum;
progress=(int)(((float)count/length)*100);
Log.e(TAG,"下载进度"+progress);
mhandler.sendEmptyMessage(DOWNLOAD_ING);
if(readnum<=0){
//下载结束
mhandler.sendEmptyMessage(DOWNLOAD_OVER);
break;
}
out.write(buffer,0,readnum);
}while(!interceptFlag);
is.close();
out.close();
}catch(MalformedURLExceptione){
e.printStackTrace();
}catch(IOExceptione){
e.printStackTrace();
}
}
};
/*
*安装下载的apk文件
*/
privatevoidinstallApk(){
Filefile=newFile(saveFileName);
if(!file.exists()){
return;
}
Intentintent=newIntent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse("file://"+file.toString()),"application/vnd.android.package-archive");
mContext.startActivity(intent);
}
}

以上代码注释足够详细。不解释了。。

2.3在Main中调用试试吧。

[java] view plain copy print ?

packagecom.doublejun.update;
importandroid.app.Activity;
importandroid.os.Bundle;
publicclassMainextendsActivity{
/**Calledwhentheactivityisfirstcreated.*/
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
UpdateManagerupdate=newUpdateManager(this);
update.checkUpdate();
}
}

好吧，就这些。希望对你有帮助。

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