«

安卓自动更新功能实现+安卓调用默认浏览器打开指定URL

时间：2024-3-2 19:10     作者：韩俊     分类： Android 

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

    Intent intent = new Intent();        
        intent.setAction("android.intent.action.VIEW");    
        Uri content_url = Uri.parse("http://www.baidu.com");   
        intent.setData(content_url);  
        startActivity(intent);打开浏览器
        System.exit(0);//退出当前APP

打开指定网页 注意加



自动更新原理

APP有一个叫版本号的属性 对比远程服务器上的版本号

如果服务器上的版本号>APP版本 则根据服务器上的下载地址 下载新的版本 之后安装 （会自动覆盖之前的版本）

服务器版本号和下载地址用XML储存 :

<update>
<version>3</version>
<name>baidu_xinwen_1.1.0</name>
<url>http://www.wangfuxin.com/UpdateSoftDemo.apk</url>
</update>

下边一个类为更新类 包括判断版本 执行下载 安装 
package com.szy.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.Dialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
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;

/**
 *@author coolszy
 *@date 2012-4-26
 *@blog http://blog.92coding.com
 */

public class UpdateManager
{

    private static final int DOWNLOAD = 1;

    private static final int DOWNLOAD_FINISH = 2;

    HashMap<String, String> mHashMap;

    private String mSavePath;

    private int progress;

    private boolean cancelUpdate = false;

    private Context mContext;

    private ProgressBar mProgress;
    private Dialog mDownloadDialog;

    private Handler mHandler = new Handler()
    {
        public void handleMessage(Message msg)
        {
            switch (msg.what)
            {

            case DOWNLOAD:

                mProgress.setProgress(progress);
                break;
            case DOWNLOAD_FINISH:

                installApk();
                break;
            default:
                break;
            }
        };
    };

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

    public boolean checkUpdate()
    {
        if (isUpdate())
        {

            showNoticeDialog();
            return false;
        } else
        {
            return true;
        }
    }
    public InputStream getInputStreamFromUrl(String urlStr)//根据URL获取XML文件
            throws MalformedURLException, IOException {
        URL  url = new URL(urlStr);
        HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
        InputStream inputStream = urlConn.getInputStream();
        return inputStream;
    }

    private boolean isUpdate()
    {

        int versionCode = getVersionCode(mContext);
        try
        {
        InputStream inStream =getInputStreamFromUrl("http://www.wangfuxin.com/version.xml");//XML地址

        ParseXmlService service = new ParseXmlService();

            mHashMap = service.parseXml(inStream);
        } catch (Exception e)
        {
            e.printStackTrace();
        }
        if (null != mHashMap)
        {
            int serviceCode = Integer.valueOf(mHashMap.get("version"));

            if (serviceCode > versionCode)
            {
                return true;
            }
        }
        return false;
    }

    private int getVersionCode(Context context)
    {
        int versionCode = 0;
        try
        {

            versionCode = context.getPackageManager().getPackageInfo("com.szy.update", 0).versionCode;
        } catch (NameNotFoundException e)
        {
            e.printStackTrace();
        }
        return versionCode;
    }

    private void showNoticeDialog()
    {

        AlertDialog.Builder builder = new Builder(mContext);
        builder.setTitle(R.string.soft_update_title);
        builder.setMessage(R.string.soft_update_info);

        builder.setPositiveButton(R.string.soft_update_updatebtn, new OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                dialog.dismiss();

                //如果用户单击更新
                showDownloadDialog();
            }
        });

        builder.setNegativeButton(R.string.soft_update_later, new OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                //如果用户选择稍后跟新（）
                dialog.dismiss();
                    //直接退出。。。。当然你可以不这么干
                    System.exit(0);
            }
        });
        Dialog noticeDialog = builder.create();
        noticeDialog.show();
    }

    private void showDownloadDialog()
    {

        AlertDialog.Builder builder = new Builder(mContext);
        builder.setTitle(R.string.soft_updating);

        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);

        builder.setNegativeButton(R.string.soft_update_cancel, new OnClickListener()
        {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                dialog.dismiss();

                cancelUpdate = true;
            }
        });
        mDownloadDialog = builder.create();
        mDownloadDialog.show();

        downloadApk();
    }

    private void downloadApk()
    {

        new downloadApkThread().start();
    }

    private class downloadApkThread extends Thread
    {
        @Override
        public void run()
        {
            try
            {

                if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
                {

                    String sdpath = Environment.getExternalStorageDirectory() + "/";
                    mSavePath = sdpath + "download";
                    URL url = new URL(mHashMap.get("url"));

                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                    conn.connect();

                    int length = conn.getContentLength();

                    InputStream is = conn.getInputStream();

                    File file = new File(mSavePath);

                    if (!file.exists())
                    {
                        file.mkdir();
                    }
                    File apkFile = new File(mSavePath, mHashMap.get("name"));
                    FileOutputStream fos = new FileOutputStream(apkFile);
                    int count = 0;

                    byte buf[] = new byte[1024];

                    do
                    {
                        int numread = is.read(buf);
                        count += numread;

                        progress = (int) (((float) count / length) * 100);

                        mHandler.sendEmptyMessage(DOWNLOAD);
                        if (numread <= 0)
                        {

                            mHandler.sendEmptyMessage(DOWNLOAD_FINISH);
                            break;
                        }

                        fos.write(buf, 0, numread);
                    } while (!cancelUpdate);
                    fos.close();
                    is.close();
                }
            } catch (MalformedURLException e)
            {
                e.printStackTrace();
            } catch (IOException e)
            {
                e.printStackTrace();
            }

            mDownloadDialog.dismiss();
        }
    };

    private void installApk()
    {
        File apkfile = new File(mSavePath, mHashMap.get("name"));
        if (!apkfile.exists())
        {
            return;
        }

        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");
        mContext.startActivity(i);
    }
}

上边的类用到了一个XML解析的类在这里 
package com.szy.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;
    }
}


之后是调用方法
package com.szy.update;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class MainActivity extends Activity
{
    boolean a=true;
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
                UpdateManager manager = new UpdateManager(MainActivity.this);
        if(manager.checkUpdate())//不加这个判断的话 会同步执行下边的代码 所以加了这个 你也可以去掉试试
        {                        //checkUpdate这个会自动判断是否为新版本 然后提示 是否更新 之后执行相关的操作
            //如果是最新版本 则
                }
        else
        {
          //否则这里什么也不用写    
        }
    }

}

文章借鉴了：coolszy的博文 在他的基础上添加了 远程XML的访问 跟判断
有任何问题欢迎留言

标签: android

热门推荐

1 AndroidStudio 文档自动提示&amp;代码提示补全
2 Android 应用测试总结
3 常用Android开源框架
4 Android 多个ImageView图片层叠透明区域点击事件穿透
5 AndroidのListView包含CheckBox时滑动丢失选中状态的解决
6 Android include 标签注意点
7 【Android开发】关于android-beacon-library
8 Android Volley完全解析(一)，初识Volley的基本用法
9 android自定义属性三部曲
10 Go项目（二）、toolbar和Material Design风格的选择

日历

标签

hbase maven eclipse sybase PostgreSQL spring emcache oracle mongodb redis nginx golang java vue android ios mysql linux 微信小程序 css html php教程 javascript python php

搜索

最新文章

热门文章