（android实战）应用在线版本更新

Step One 应用系统配置文件----应用版本配置信息

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="TP.NationalTest"
      android:versionCode="4"
      android:versionName="1.4">
    <uses-sdk android:minSdkVersion="4" />

versionCode：版本号

versionName：版本名称

minSdkVersion：最小SDk版本

Step Two 后台验证当前应用版本是否要更新

 

/*检测应用版本*/
privatevoid CheckAppEdtion()
{
//判断网络连接，如连接
//Step One 判断当前是否有网络连接,
if(!NetWorkUtility.CheckConnection(this))
{
return;
}
//获取网络平台的版本信息
CAppInfo model=AppDataServiceHelper.GetAppEdtionInfo(ProjectConstant.AppID);

//比较版本信息，有新版本 弹出 对话框

if(model!=null)
{

try {
PackageInfo info =this.getPackageManager().getPackageInfo(this.getPackageName(), 0);
int oldVersion = info.versionCode;
int newVersion = Integer.parseInt(model.Edition);
if(newVersion > oldVersion){
//创建更新对话框，并弹出
AppUpdateDialog.CreateRegisterAlert(this);
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}

Step THree 弹出对话框 ，用户选择是否要更新APK

 

static ProgressDialog m_Dialog;
static Context m_context = null ;
static AlertDialog appupdatedialog = null ;
/* 创建查看单题对话框 */
public static void CreateRegisterAlert(Context context)
{
m_context = context;
Dialog dialog = new AlertDialog.Builder(context).setTitle( " 系统更新 " )
.setMessage( " 已有新版本，是否更新？ " )
.setPositiveButton( " 确定 " , new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
m_Dialog = ProgressDialog.show(m_context, " 请等待... " , " 正在更新，请稍后... " , true );
mRegsiterHandler.sleep( 1000 );

}
})
.setNegativeButton( " 取消 " , new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {

}
}).create();
dialog.show();

}

 Step four 下载APK，并更新应用版本

 

/*
*定时注册程序
* */
private static RegsiterHandler mRegsiterHandler = new RegsiterHandler();

static class RegsiterHandler extends Handler {

@Override
public void handleMessage(Message msg) {
try {
String url = " http://xx.xx.xx.xx/gointel/nationaltest.html " ;
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(url);
HttpResponse response;

response = client.execute(get);
HttpEntity entity = response.getEntity();
long length = entity.getContentLength();
InputStream is = entity.getContent();
FileOutputStream fileOutputStream = null ;
if (is != null ) {

File file = new File(Environment
.getExternalStorageDirectory(), " nationaltest.apk " );
fileOutputStream = new FileOutputStream(file);


byte [] buf = new byte [ 1024 ];
int ch = - 1 ;
while ((ch = is.read(buf)) != - 1 ) {
fileOutputStream.write(buf, 0 , ch);
}

}
fileOutputStream.flush();
if (fileOutputStream != null ) {
fileOutputStream.close();
}

}
catch (Exception ex)
{

}
finally {
m_Dialog.cancel();
}
install();

}
public void sleep( long delayMillis) {
this .removeMessages( 0 );
sendMessageDelayed(obtainMessage( 0 ), delayMillis);
}
};


private static void install() {
Intent i = new Intent();
// i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.setAction(Intent.ACTION_VIEW);
i.setDataAndType(Uri.fromFile( new File( " /sdcard/nationaltest.apk " )),
" application/vnd.android.package-archive " );
m_context.startActivity(i);
// finish();
}