package com.altersoft.FoodMisClient;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;
import android.os.Environment;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.widget.Toast;
public class Update extends Activity {
public static float localVersion = 0;
public static float serverVersion = 0;
public ProgressDialog pBar;
private Handler handler = new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.contact_manager);
initGlobal();// 初始化本地版本和服务器版本
checkVersion();// 检查本地版本是否需要更新
}
public void initGlobal() {
try {
localVersion = getPackageManager().getPackageInfo(getPackageName(),
0).versionCode; // 设置本地版本号
serverVersion = 0;
version("http://60.171.56.198:8000/Home/Version");// 下载版本号信息
ReadXML();// 从下载文件中读取版本号并给版本号变量赋值
} catch (Exception ex) {
ex.printStackTrace();
}
}
public void version(final String url) {
new Thread() {
public void run() {
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(url);
HttpResponse response;
try {
response = client.execute(get);
HttpEntity entity = response.getEntity();// 得到数据流
long length = entity.getContentLength();// 得到数据流长度
InputStream is = entity.getContent();// 得到数据流内容
FileOutputStream fileOutputStream = null;
if (is != null) {
File file = new File(
Environment.getExternalStorageDirectory()
+ "/version.xml");
fileOutputStream = new FileOutputStream(file);
byte[] buf = new byte[1024];
int ch = -1;// 一次从输入流读取的字节长度
int count = 0;// 总共读取的长度
while ((ch = is.read(buf)) != -1) {
fileOutputStream.write(buf, 0, ch);
count += ch;
if (length > 0) {// 如果length>0表示还有没下载
完的数据
length = length - ch;
}
}
}
fileOutputStream.flush();
if (fileOutputStream != null) {
fileOutputStream.close();
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
}
void ReadXML() {
DocumentBuilderFactory docBuilderFactory = null;
DocumentBuilder docBuilder = null;
Document doc = null;
try {
docBuilderFactory = DocumentBuilderFactory.newInstance();
docBuilder = docBuilderFactory.newDocumentBuilder();
// xml file 放到 assets目录中的
File f = new File(Environment.getExternalStorageDirectory()
+ "/version.xml");
InputStream is = new FileInputStream(f);
doc = docBuilder.parse(is);
// root element
Element root = doc.getDocumentElement();
// Do something here
// get a NodeList by tagname
NodeList nodeList = root.getElementsByTagName("string");
Element nd = (Element) nodeList.item(0);
// serverVersion = Integer.parseInt(nd.getNodeValue());
String s = nd.getChildNodes().item(0).getNodeValue().toString();
serverVersion = Float.parseFloat(s);
} catch (IOException e) {
} catch (SAXException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
} finally {
doc = null;
docBuilder = null;
docBuilderFactory = null;
}
}
public void checkVersion() {
if (localVersion < serverVersion) {
// 发现新版本，提示用户更新
AlertDialog.Builder alert = new AlertDialog.Builder(this);
alert.setTitle("软件升级")
.setMessage("发现新版本,建议立即更新使用.")
.setPositiveButton("更新",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface
dialog,
int which) {
pBar = new ProgressDialog
(Update.this);
pBar.setTitle("正在下载");
pBar.setMessage("请稍候...");
pBar.setProgressStyle
(ProgressDialog.STYLE_SPINNER);
// 这里的url要改成下载的服务器
的地址
downFile
("http://60.171.56.198:8000/Home/Download");
}
})
.setNegativeButton("取消",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface
dialog,
int which) {
dialog.dismiss();
}
});
alert.create().show();
}
}
void downFile(final String url) {
pBar.show();
new Thread() {
public void run() {
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(url);
HttpResponse response;
try {
response = client.execute(get);
HttpEntity entity = response.getEntity();// 得到数据流
long length = entity.getContentLength();// 得到数据流长度
InputStream is = entity.getContent();// 得到数据流内容
FileOutputStream fileOutputStream = null;
if (is != null) {
File file = new File("/sdcard/update.apk");
fileOutputStream = new FileOutputStream(file);
byte[] buf = new byte[1024];
int ch = -1;// 一次从输入流读取的字节长度
int count = 0;// 总共读取的长度
while ((ch = is.read(buf)) != -1) {
fileOutputStream.write(buf, 0, ch);
count += ch;
if (length > 0) {// 如果length>0表示还有没下载
完的数据
length = length - ch;
}
}
}
fileOutputStream.flush();
if (fileOutputStream != null) {
fileOutputStream.close();
}
down();// 关闭滚动条并打开刚刚下载的最新版本安装程序
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
}
void down() {
handler.post(new Runnable() {
public void run() {
pBar.cancel();
Toast.makeText(Update.this, "下载完毕，开始安装", Toast.LENGTH_LONG)
.show();
update();
}
});
}
void update() {// 打开更新的安装程序
File file = new File("/sdcard/update.apk");
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),
"application/vnd.android.package-archive");
startActivity(intent);
}
}
另外附上version.xml文件
<?xml version="1.0" encoding="UTF-8" ?>
<Versions>
<Version>
<versionCode>2.0</versionCode>
</Version>
</Versions>