Android应用程序更新并下载实例
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：
importjava.io.BufferedReader;
importjava.io.File;
importjava.io.FileOutputStream;
importjava.io.IOException;
importjava.io.InputStream;
importjava.io.InputStreamReader;
importjava.net.HttpURLConnection;
importjava.net.MalformedURLException;
importjava.net.URL;
importcom.af.mobile.R;
importandroid.app.AlertDialog;
importandroid.app.Dialog;
importandroid.app.AlertDialog.Builder;
importandroid.content.Context;
importandroid.content.DialogInterface;
importandroid.content.Intent;
importandroid.content.DialogInterface.OnClickListener;
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.Toast;
publicclassUpdateManager
{privateURLurl=null;
/*下载中*/
privatestaticfinalintDOWNLOAD=1;
/*下载结束*/
privatestaticfinalintDOWNLOAD_FINISH=2;
/*保存解析的XML信息*/
//HashMapmHashMap;
/*下载保存路径*/
privateStringmSavePath;
/*记录进度条数量*/
privateintprogress;
/*是否取消更新*/
privatebooleancancelUpdate=false;
privateContextmContext;
/*更新进度条*/
privateProgressBarmProgress;
privateDialogmDownloadDialog;
privateHandlermHandler=newHandler()
{
publicvoidhandleMessage(Messagemsg)
{
switch(msg.what)
{
//正在下载
caseDOWNLOAD:
//设置进度条位置
mProgress.setProgress(progress);
break;
caseDOWNLOAD_FINISH:
//安装文件
installApk();
break;
default:
break;
}
};
};
publicUpdateManager(Contextcontext)
{
this.mContext=context;
}
publicvoidcheckUpdate()
{
if(isUpdate())
{
showNoticeDialog();
}else
{
}
}
/**
*检查软件是否有更新版本
*
*@return
*/
privatebooleanisUpdate()
{
//获取当前软件版本
DoubleversionCode=getVersionCode(mContext);
DoubleserviceCode=1.2;
//版本判断
if(serviceCode>versionCode)
{
returntrue;
}
returnfalse;
}
//获取软件版本号
privateDoublegetVersionCode(Contextcontext)
{
DoubleversionCode=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(NameNotFoundExceptione)
{
e.printStackTrace();
}
returnversionCode;
}
//显示软件更新对话框
privatevoidshowNoticeDialog()
{
AlertDialog.Builderbuilder=newBuilder(mContext);
builder.setTitle("软件更新");
Stringstring=download("http://192.168.0.102:9313/daojuserver/uploads/version.xml");//xml的下载地址
builder.setMessage(string);
builder.setPositiveButton("更新",newOnClickListener()
{
@Override
publicvoidonClick(DialogInterfacedialog,intwhich)
{
dialog.dismiss();
//显示下载对话框
showDownloadDialog();
}
});
//稍后更新
builder.setNegativeButton("稍后更新",newOnClickListener()
{
@Override
publicvoidonClick(DialogInterfacedialog,intwhich)
{
dialog.dismiss();
}
});
DialognoticeDialog=builder.create();
noticeDialog.show();
}
//显示软件下载对话框
privatevoidshowDownloadDialog()
{
//构造软件下载对话框
AlertDialog.Builderbuilder=newBuilder(mContext);
builder.setTitle("djfkjd");//提示信息内容
//给下载对话框增加进度条
finalLayoutInflaterinflater=LayoutInflater.from(mContext);
Viewv=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",newOnClickListener()
{
@Override
publicvoidonClick(DialogInterfacedialog,intwhich)
{
dialog.dismiss();
//设置取消状态
cancelUpdate=true;
}
});
mDownloadDialog=builder.create();
mDownloadDialog.show();
//现在文件
downloadApk();
}
privatevoiddownloadApk()
{
//启动新线程下载软件
newdownloadApkThread().start();
}
privateclassdownloadApkThreadextendsThread
{
@Override
publicvoidrun()
{
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
Stringsdpath=Environment.getExternalStorageDirectory()+"/";
mSavePath=sdpath+"download";
URLurl=newURL("http://192.168.0.102:9313/daojuserver/uploads/SpMobile.apk");//apk下载地址地址
//创建连接
HttpURLConnectionconn=(HttpURLConnection)url.openConnection();
conn.connect();
//获取文件大小
intlength=conn.getContentLength();
//创建输入流
InputStreamis=conn.getInputStream();
Filefile=newFile(mSavePath);
if(!file.exists())
{
file.mkdir();
}
FileapkFile=newFile(mSavePath,"dhfudh");
FileOutputStreamfos=newFileOutputStream(apkFile);
intcount=0;
//缓存
bytebuf[]=newbyte[1024];
//写入到文件中
do
{
intnumread=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(MalformedURLExceptione)
{
e.printStackTrace();
}catch(IOExceptione)
{
e.printStackTrace();
}
//取消下载对话框显示
mDownloadDialog.dismiss();
}
};
privatevoidinstallApk()
{
Fileapkfile=newFile(mSavePath,"dhfudh");
if(!apkfile.exists())
{
return;
}
//通过Intent安装APK文件
Intenti=newIntent(Intent.ACTION_VIEW);
i.setDataAndType(Uri.parse("file://"+apkfile.toString()),"application/vnd.android.package-archive");
mContext.startActivity(i);
}
publicStringdownload(StringurlString)
{
StringBuffersbBuffer=newStringBuffer();
Stringline=null;
BufferedReaderbuffer=null;
try{
url=newURL(urlString);
HttpURLConnectionurlConn=(HttpURLConnection)url.openConnection();
buffer=newBufferedReader(newInputStreamReader(urlConn.getInputStream()));
while((line=buffer.readLine())!=null)
{
sbBuffer.append(line);
}
}catch(Exceptione){
//TODO:handleexception
e.printStackTrace();
}
finally
{
try{
buffer.close();
}catch(Exceptione2){
//TODO:handleexception
e2.printStackTrace();
}
}
returnsbBuffer.toString();
}
}
在Android应用程序Main界面
if(isOpenNetwork())//判断是否有网络
{
UpdateManagermanager=newUpdateManager(Main.this);
//检查软件更新
manager.checkUpdate();
}
判断移动端是否有网络
privatebooleanisOpenNetwork(){
ConnectivityManagerconnManager=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfonetworkInfo=connManager.getActiveNetworkInfo();
if(networkInfo!=null){
//2.获取当前网络连接的类型信息
intnetworkType=networkInfo.getType();
if(ConnectivityManager.TYPE_WIFI==networkType){
//当前为wifi网络
}elseif(ConnectivityManager.TYPE_MOBILE==networkType){
//当前为mobile网络
}
returnconnManager.getActiveNetworkInfo().isAvailable();
}
returnfalse;
}
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毛票票。