Android开发应用异步检查更新代码

开发环境：android studio sdk 4.0及以上

场景：用户点击检查更新按钮进行检查服务器版本号，若有新版本则进行下载更新。异步检测版本号

package com.example.qurenwu.qurenwu_2.util;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.example.qurenwu.qurenwu_2.R;
import com.example.qurenwu.qurenwu_2.custom.GotaskGlobalVal;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

/**
* Created by Administrator on 2014/12/3.
*/
public class UpdateManager {
GotaskGlobalVal globalVal;  //全局
/* 下载中 */
private static final int DOWNLOAD = 1;
/* 下载结束 */
private static final int DOWNLOAD_FINISH = 2;
/*检查是否有更新*/
private static final int CHECK_APK_VERSION= 3;
/* 保存解析的XML信息 */
HashMap<String, String> mHashMap;
/* 下载保存路径 */
private String mSavePath;
/* 记录进度条数量 */
private int progress;
/* 是否取消更新 */
private boolean cancelUpdate = false;

private Context mContext;

private int mFlag; // 0:自启动检测  1：手动检测，区别在于前者若无更新则不提示，后者若无更新需要提示
/* 更新进度条 */
private ProgressBar mProgress;
private Dialog mDownloadDialog;

private Handler mHandler = new Handler()
{
public void handleMessage(Message msg)
{
switch (msg.what)
{
// 正在下载
case DOWNLOAD:
// 设置进度条位置
mProgress.setProgress(progress);
break;
case DOWNLOAD_FINISH:
// 安装文件
installApk();
break;
case CHECK_APK_VERSION:  //检查版本更新
mHashMap = (HashMap<String,String>)msg.obj;
// 获取当前软件版本
int versionCode = getVersionCode(mContext);
if (null != mHashMap)
{
int serviceCode = Integer.valueOf(mHashMap.get("version"));
// 版本判断
Log.v("isUpdate","serviceCode:"+serviceCode+";versionCode:"+versionCode);
if (serviceCode > versionCode)
{
//需要更新
showNoticeDialog();
}
else
{
if(mFlag == 1)
{Toast.makeText(mContext, R.string.soft_update_no, Toast.LENGTH_LONG).show();}
}
}
break;
default:
break;
}
};
};

public UpdateManager(Context context)
{
this.mContext = context;
globalVal = (GotaskGlobalVal)context.getApplicationContext();
mFlag = 0;
}

/**
* 检测软件更新
* @param flag 0:启动时检测  1：手动检测，区别在于前者若无更新则不提示，后者若无更新需要提示
*/
public void checkUpdate(int flag)
{
mFlag = flag;
CheckVersionHttpThread checkthread = new CheckVersionHttpThread(mHandler,CHECK_APK_VERSION);
new Thread(checkthread).start();
}
/**
* 检查软件是否有更新版本
*
* @return
*/
private boolean isUpdate()
{
// 获取当前软件版本
int versionCode = getVersionCode(mContext);
// 把version.xml放到网络上，然后获取文件信息
//InputStream inStream = ParseXmlService.class.getClassLoader().getResourceAsStream("version.xml");
// 解析XML文件。 由于XML文件比较小，因此使用DOM方式进行解析
ParseXmlService service = new ParseXmlService();
try
{
//String path = "http://192.168.1.146:8080/picweb/xml/version.xml";
String path = globalVal.BASE_URL+"/xml/version.xml";
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setReadTimeout(5*1000);
conn.setRequestMethod("GET");
InputStream inStream = conn.getInputStream();
mHashMap = service.parseXml(inStream);
} catch (Exception e)
{
e.printStackTrace();
}
if (null != mHashMap)
{
int serviceCode = Integer.valueOf(mHashMap.get("version"));
// 版本判断
Log.v("isUpdate","serviceCode:"+serviceCode+";versionCode:"+versionCode);
if (serviceCode > versionCode)
{
return true;
}
}
return false;
}

/**
* 获取软件版本号
*
* @param context
* @return
*/
private int getVersionCode(Context context)
{
int versionCode = 0;
try
{
// 获取软件版本号，对应AndroidManifest.xml下android:versionCode
versionCode = context.getPackageManager().getPackageInfo("com.example.qurenwu.qurenwu_2", 0).versionCode;
} catch (PackageManager.NameNotFoundException e)
{
e.printStackTrace();
}
return versionCode;
}

/**
* 显示软件更新对话框
*/
private void showNoticeDialog()
{
// 构造对话框
AlertDialog.Builder builder = new Builder(mContext);
builder.setTitle(R.string.soft_update_title);
builder.setMessage(R.string.soft_update_info);
// 更新
builder.setPositiveButton(R.string.soft_update_updatebtn, new OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
// 显示下载对话框
showDownloadDialog();
}
});
// 稍后更新
builder.setNegativeButton(R.string.soft_update_later, new OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
}
});
Dialog noticeDialog = builder.create();
noticeDialog.show();
}

/**
* 显示软件下载对话框
*/
private void showDownloadDialog()
{
// 构造软件下载对话框
AlertDialog.Builder builder = new Builder(mContext);
builder.setTitle(R.string.soft_updating);
// 给下载对话框增加进度条
final LayoutInflater inflater = LayoutInflater.from(mContext);
View v = inflater.inflate(R.layout.softupdate_progress, null);
mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
builder.setView(v);
// 取消更新
builder.setNegativeButton(R.string.soft_update_cancel, new OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
// 设置取消状态
cancelUpdate = true;
}
});
mDownloadDialog = builder.create();
mDownloadDialog.show();
// 现在文件
downloadApk();
}

/**
* 下载apk文件
*/
private void downloadApk()
{
// 启动新线程下载软件
new downloadApkThread().start();
}

/**
* 下载文件线程
*/
private class downloadApkThread extends Thread
{
@Override
public void run()
{
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
String sdpath = Environment.getExternalStorageDirectory() + "/";
mSavePath = sdpath + "download";
URL url = new URL(mHashMap.get("url"));
// 创建连接
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.connect();
// 获取文件大小
int length = conn.getContentLength();
// 创建输入流
InputStream is = conn.getInputStream();

File file = new File(mSavePath);
// 判断文件目录是否存在
if (!file.exists())
{
file.mkdir();
}
File apkFile = new File(mSavePath, mHashMap.get("name"));
FileOutputStream fos = new FileOutputStream(apkFile);
int count = 0;
// 缓存
byte buf[] = new byte[1024];
// 写入到文件中
do
{
int numread = 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)
{
// 下载完成
mHandler.sendEmptyMessage(DOWNLOAD_FINISH);
break;
}
// 写入文件
fos.write(buf, 0, numread);
} while (!cancelUpdate);// 点击取消就停止下载.
fos.close();
is.close();
}
} catch (MalformedURLException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
// 取消下载对话框显示
mDownloadDialog.dismiss();
}
};

/**
* 安装APK文件
*/
private void installApk()
{
File apkfile = new File(mSavePath, mHashMap.get("name"));
if (!apkfile.exists())
{
return;
}
// 通过Intent安装APK文件
Intent i = new Intent(Intent.ACTION_VIEW);
i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");
mContext.startActivity(i);
}
class ParseXmlService
{
public HashMap<String, String> parseXml(InputStream inStream) throws Exception
{
HashMap<String, String> hashMap = new HashMap<String, String>();

// 实例化一个文档构建器工厂
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
// 通过文档构建器工厂获取一个文档构建器
DocumentBuilder builder = factory.newDocumentBuilder();
// 通过文档通过文档构建器构建一个文档实例
Document document = builder.parse(inStream);
//获取XML文件根节点
Element root = document.getDocumentElement();
//获得所有子节点
NodeList childNodes = root.getChildNodes();
for (int j = 0; j < childNodes.getLength(); j++)
{
//遍历子节点
Node childNode = (Node) childNodes.item(j);
if (childNode.getNodeType() == Node.ELEMENT_NODE)
{
Element childElement = (Element) childNode;
//版本号
if ("version".equals(childElement.getNodeName()))
{
hashMap.put("version",childElement.getFirstChild().getNodeValue());
}
//软件名称
else if (("name".equals(childElement.getNodeName())))
{
hashMap.put("name",childElement.getFirstChild().getNodeValue());
}
//下载地址
else if (("url".equals(childElement.getNodeName())))
{
hashMap.put("url",childElement.getFirstChild().getNodeValue());
}
}
}
return hashMap;
}
}
/**
* 检测线程
*/
class CheckVersionHttpThread implements Runnable{
private Handler handler;
int requestCode;
/**
* @param _handler
* @param _requestCode  若一个activity有多个此请求，那么activity中的handle的msg .what也不同，用该字段区分
*/
public CheckVersionHttpThread(Handler _handler,int _requestCode)
{
this.handler = _handler;
this.requestCode = _requestCode;
}
@Override
public void run() {
HashMap<String, String> result= null;
// 把version.xml放到网络上，然后获取文件信息
//InputStream inStream = ParseXmlService.class.getClassLoader().getResourceAsStream("version.xml");
// 解析XML文件。 由于XML文件比较小，因此使用DOM方式进行解析
ParseXmlService service = new ParseXmlService();
try
{
//String path = "http://192.168.1.146:8080/picweb/xml/version.xml";
String path = globalVal.BASE_URL+"/xml/version.xml";
URL url = new URL(path);
HttpURLConnection conn = (HttpURLConnection)url.openConnection();
conn.setReadTimeout(5*1000);
conn.setRequestMethod("GET");
InputStream inStream = conn.getInputStream();
result = service.parseXml(inStream);
} catch (Exception e)
{
e.printStackTrace();
}
Message msg = new Message();
msg.what = requestCode;
msg.obj = result;
handler.sendMessage(msg);
}
}
}

主界面中调用：

//检测新版本
UpdateManager manager = new UpdateManager(MyActivity.this);// 检查软件更新
manager.checkUpdate(0); // 0:表示启动时检测  1：手动检测，区别在于前者若无更新则不提示，后者若无更新需要提示

mainfest.xml 中需要配置版本号

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.qurenwu.qurenwu_2"
android:versionCode="1"
android:versionName="1.0" >

string.xml需要增加字符串

<string name="soft_update_no">已经是最新版本</string>
<string name="soft_update_title">软件更新</string>
<string name="soft_update_info">检测到新版本，立即更新吗</string>
<string name="soft_update_updatebtn">更新</string>
<string name="soft_update_later">稍后更新</string>
<string name="soft_updating">正在更新</string>
<string name="soft_update_cancel">取消</string>

服务器端需要在目录如：http://192.168.11.1/xml/ 目录下增加文件 version.xml 内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<update>
<version>1</version>  <!-- 必须是整数 -->
<name>gotask.1.0</name>
<url>http://192.168.11.6/download/gotask.apk</url>
</update>

ok！ 大功告成！