Android 自动更新

在网上看了很多大牛写的后，自己仿写的一个自动更新 大概步骤就是，对比版本检测更新，下载apk，安装apk 直接上代码吧

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package com.example.updatetestdemo.utils;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import org.xmlpull.v1.XmlPullParser;

import com.example.updatetestdemo.datas.UpdateXml;
import com.example.updatetestdemo.interfaces.UpdatexmlService;

import android.util.Xml;


/**
 * 更新
 */
public class UpdateServiceIml implements UpdatexmlService{

    @Override
    public List<UpdateXml> parseXMLByPull(InputStream xml) throws Exception {

        List<UpdateXml> uxList = null;
        UpdateXml uXml = null;
        // 首先得到Pull解析器
        // XmlPullParser pull=(XmlPullParser) XPathFactory.newInstance();
        XmlPullParser pull = Xml.newPullParser();
        pull.setInput(xml, "UTF-8");// 设置要解析XML数据源
        // 解析的过程中他会把xml读取到一个字符数组中，然后一个逐个字符读取当读取到结束标志">"时，会去根据XML语法判断，若匹配了某种语法就会出发预定义的事件比如说start
        // document等,当解析到了start document之后就不会主动往后解析了
        int event = pull.getEventType();// 获取事件类型
        while (event != XmlPullParser.END_DOCUMENT) {
            switch (event) {
            case XmlPullParser.START_DOCUMENT:
                uxList = new ArrayList<UpdateXml>();
                uXml=new UpdateXml();
                break;
            // 当解析到了Employee节点，触发Start_tag
            case XmlPullParser.START_TAG:
                if ("version".equals(pull.getName())) {
                    String version = pull.nextText();
                    System.out.println("version"+version);
                    uXml.setVersion(version);
                }
                if ("name".equals(pull.getName())) {
                    String name = pull.nextText();
                    System.out.println("name"+name);
                    uXml.setName(name);
                }
                if ("url".equals(pull.getName())) {
                    String url = pull.nextText();
                    System.out.println("url"+url);
                    uXml.setUrl(url);
                }
                break;
            // 解析到结束标志时触发
            case XmlPullParser.END_TAG:
                if ("update".equals(pull.getName())) {
                    uxList.add(uXml);
                    uXml = null;
                }
                break;
            }
            event = pull.next();// 主动去遍历下一个节点
        }
        xml.close();
        return uxList;
    }

}

/**
 * 更新
 */
public interface UpdatexmlService {
    // 定义解析XML文件的方法
    /**
     * (non-Javadoc)
     * @see com.example.interfaces.IEmployeeService#parseXMLByPull(java.io.InputStream)
     * 使用Pull解析XML
     */
    public List<UpdateXml> parseXMLByPull(InputStream xml) throws Exception;
}

package com.example.updatetestdemo.utils;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.ref.WeakReference;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;

import com.example.updatetestdemo.R;
import com.example.updatetestdemo.datas.UpdateXml;
import com.example.updatetestdemo.interfaces.UpdatexmlService;

import android.annotation.SuppressLint;
import android.app.Activity;
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.os.StrictMode;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;

/**
 * 更新
 */
public class Update {
    // 获取XML的Url地址
    private String path = "http://XXX.XXX.X.XXX:8080/Android/version.xml";
    // 获取软件版本号的路径，对应AndroidManifest.xml下android:versionCode
    private String versionCodePath = "com.example.updatetestdemo";
    /* 保存解析的XML信息 */
    private List<UpdateXml> uxList;
    /* 下载 */
    private static final int DOWNLOAD = 1;
    /* 下载结束 */
    private static final int DOWNLOAD_FINISH = 2;
    /* 显示更新对话框*/
    private static final int UPDATE_YES = 3;
    /* 没有更新的提示*/
    private static final int UPDATE_ON = 4;
    /* 下载保存路径 */
    private String mSavePath;
    /* 记录进度条数 */
    private int progress;
    /* 是否取消更新 */
    private boolean cancelUpdate = false;

    private Context mContext;
    /* 更新进度 */
    private ProgressBar mProgress;
    private Dialog mDownloadDialog;
    private MyHandlerUpdate myHandler = new MyHandlerUpdate(this);

    static class MyHandlerUpdate extends Handler {
        WeakReference<Update> mActivityReference;

        MyHandlerUpdate(Update activity) {
            mActivityReference = new WeakReference<Update>(activity);
        }

        @Override
        public void handleMessage(Message msg) {
            final Update activity = mActivityReference.get();
            if (activity != null) {
                switch (msg.what) {
                // 正在下载
                case DOWNLOAD:
                    // 设置进度条位置
                    activity.mProgress.setProgress(activity.progress);
                    break;
                case DOWNLOAD_FINISH:
                    // 安装文件
                    activity.installApk();
                case UPDATE_YES:
                    // 检测到有更新，显示更新对话框
                    activity.showNoticeDialog();
                case UPDATE_ON:
                    // 已经是最新版本
                    Toast.makeText(activity.mContext, "已经是最新版本",
                            Toast.LENGTH_LONG).show();
                    break;
                default:
                    break;
                }
            }
        }
    }

    /**
     * 2017-3-13上午9:11:37
     * 
     * @param context
     */
    public Update(Context context) {
        this.mContext = context;
    }

    /**
     * 测试是否有更新
     */
    public void checkUpdate() {
        new Thread(new Runnable() {
            @Override
            public void run() {
                if (isUpdate()) {
                    // 显示提示对话框
                    myHandler.sendEmptyMessage(UPDATE_YES);
                } else {
                    myHandler.sendEmptyMessage(UPDATE_ON);
                }
            }
        }).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);

        URL url = null;
        HttpURLConnection conn = null;
        InputStream is = null;
        try {
            url = new URL(path);
            conn = (HttpURLConnection) url.openConnection();
            conn.setConnectTimeout(5000);
            conn.setReadTimeout(5000);
            conn.setRequestMethod("GET");
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            System.out.println(conn.getResponseCode() + "");
            if (conn.getResponseCode() == 200) {
                is = conn.getInputStream();
                UpdatexmlService uXmlService = new UpdateServiceIml();
                uxList = uXmlService.parseXMLByPull(is);
                if (is == null) {
                    L.e("TAG", " ins nullnull");
                } else {
                    L.e("TAG", " ins not nullnull");
                }
                if (uxList == null) {
                    L.e("TAG", " xml nullnull");
                }
            } else {
                throw new RuntimeException(" responseCode is not 200 ... ");
            }
            String version = uxList.get(0).getVersion();
            int serviceCode = Integer.parseInt(version);
            // 版本判断
            System.out.println(serviceCode + ">>" + versionCode);
            if (serviceCode > versionCode) {
                return true;
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        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(
                    versionCodePath, 0).versionCode;
        } catch (NameNotFoundException e) {
            e.printStackTrace();
        }
        return versionCode;
    }

    /**
     * 显示软件更新对话框
     */
    private void showNoticeDialog() {
        // 对话框
        AlertDialog.Builder builder = new Builder(mContext);
        builder.setTitle("软件更新");
        builder.setMessage("检测到新版本，立即更新吗");
        // showDownloadDialog();// 直接强制更新
        // 更新
        builder.setPositiveButton("更新", new OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                // 显示下载对话框
                showDownloadDialog();

            }
        });
        // 稍后更新
        builder.setNegativeButton("稍后更新", new OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();

            }
        });
        Dialog noticeDialog = builder.create();
        noticeDialog.show();
    }

    /**
     * 显示软件下载对话
     */
    private void showDownloadDialog() {
        // 构�?�软件下载对话框
        AlertDialog.Builder builder = new Builder(mContext);
        builder.setTitle("正在更新");
        // 给下载对话框增加进度
        final LayoutInflater inflater = LayoutInflater.from(mContext);
        View v = inflater.inflate(R.layout.update_progress, null);
        mProgress = (ProgressBar) v.findViewById(R.id.update_pb);
        builder.setView(v);
        // 取消更新
        builder.setNegativeButton("取消更新", new OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                // 设置取消状态
                cancelUpdate = true;

            }
        });
        mDownloadDialog = builder.create();
        mDownloadDialog.setCanceledOnTouchOutside(false);
        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(uxList.get(0)).start();
    }

    /**
     * 下载文件线程
     * 
     */
    private class downloadApkThread extends Thread {
        UpdateXml uXml;

        public downloadApkThread(UpdateXml ux) {
            this.uXml = ux;
        }

        @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(uXml.getUrl());
                    // 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
                    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, uXml.getName());
                    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
                        myHandler.sendEmptyMessage(DOWNLOAD);
                        if (numread <= 0) {
                            // 下载完成
                            myHandler.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();
            }
            // 取消下载对话框的显示
            mDownloadDialog.dismiss();
        }
    };

    /**
     * 安装APK文件
     */
    private void installApk() {
        File apkfile = new File(mSavePath, uxList.get(0).getName());
        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);
        ((Activity) mContext).finish();
    }

}

package com.example.updatetestdemo.datas;

/**
 * 更新
 */
public class UpdateXml {
    private String version;//版本号
    private String name;//APK名称
    private String url;//下载APK的URL
    public String getVersion() {
        return version;
    }
    public void setVersion(String version) {
        this.version = version;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    @Override
    public String toString() {
        return "UpdataInfo [version=" + version + ", name=" + name + ", url="
                + url + "]";
    }
    public UpdateXml(String version, String name, String url) {
        super();
        this.version = version;
        this.name = name;
        this.url = url;
    }
    public UpdateXml() {
        super();
    }



}