android应用检测更新代码

JAVA代码：

UpdateManager.java

package com.iteye.update;

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 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.NameNotFoundException;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.iteye.androidtoast.R;

public class UpdateManager
{
    /* 下载中 */
    private static final int DOWNLOAD = 1;
    /* 下载结束 */
    private static final int DOWNLOAD_FINISH = 2;
    /* 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;
    /* 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;
            default:
                break;
            }
        };
    };

    public UpdateManager(Context context)
    {
        this.mContext = context;
    }

    /**
     * 检测软件更新
     */
    public void checkUpdate()
    {
        if (isUpdate())
        {
            // 显示提示对话框
            showNoticeDialog();
        } else
        {
            Toast.makeText(mContext, R.string.soft_update_no, Toast.LENGTH_LONG).show();
        }
    }

    /**
     * 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";
            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
            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.iteye.androidtoast", 0).versionCode;
        } catch (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);
    }
}

ParseXmlService.java

 

package com.iteye.update;

import java.io.InputStream;
import java.util.HashMap;

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

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


public 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;
    }
}

 

version.xml

<?xml version="1.0" encoding="UTF-8"?>
<update>
    <version>1</version>
    <name>baidu_xinwen_1.1.0</name>
    <url>http://gdown.baidu.com/data/wisegame/f98d235e39e29031/baiduxinwen.apk</url>
</update>

测试代码：

UpdateManager manager = new UpdateManager(MainTwoActivity.this);
// 检查软件更新
manager.checkUpdate();

 

 

注：只需要把version.xml放到网上服务器去，更新版本时，到服务器把版本号和url修改一下就可以。