apk自动更新

package com.joey.downdemo;import android.app.DownloadManager;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.content.SharedPreferences;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.database.Cursor;import android.net.Uri;import android.os.Environment;import android.preference.PreferenceManager;import android.view.View;import android.webkit.MimeTypeMap;import java.io.File;/** * Created by ted on 2017/5/19. */public class VersionManager {    private Context context;    private AppVersion appVersion;    private DownloadManager downloadManager;    private SharedPreferences prefs;    private static final String DL_ID = "update_app_id";    // 文件在sd卡的真实目录    private String apkAbsolutePath;    public void setOnUpdateListener(OnUpdateListener listener) {        this.listener = listener;    }    private OnUpdateListener listener;    public void setAppVersion(AppVersion appVersion) {        this.appVersion = appVersion;    }    private static VersionManager instance = null;    public static VersionManager getInstance(Context context,                                             AppVersion appVersion) {        if (instance == null) {            instance = new VersionManager(context, appVersion);        }        return instance;    }    private VersionManager(Context context, AppVersion appVersion) {        this.appVersion = appVersion;        this.context = context;        apkAbsolutePath = getSDPath() + appVersion.getFilePath() + "/"                + appVersion.getFileName();        downloadManager = (DownloadManager) context                .getSystemService(Context.DOWNLOAD_SERVICE);        prefs = PreferenceManager.getDefaultSharedPreferences(context);    }    public void checkUpdateInfo() {        String localVersion = getVersionCode(context) + "";        // 这里只要两个版本不一致就更新，不考虑版本降级的情况...        if (!localVersion.equals(appVersion.getVersionCode())) {            listener.hasNewVersion(true);        } else {            listener.hasNewVersion(false);        }    }    /**     * 获取版本号(内部识别号)     *     * @param context     * @return     */    private int getVersionCode(Context context) {        try {            PackageInfo pi = context.getPackageManager().getPackageInfo(                    context.getPackageName(), 0);            return pi.versionCode;        } catch (PackageManager.NameNotFoundException e) {            e.printStackTrace();            return -1;        }    }    /**     * 下载文件     */    public void downLoad() {        if (!isSdCardExist()) {            listener.onError("文件无法下载请检测您的sd卡");            return;        }        if (isFileExist(apkAbsolutePath)) {            // 如果文件已经存在则安装app            installApk();            return;        }        // 开始下载        Uri resource = Uri.parse(appVersion.getApkUrl());        DownloadManager.Request request = new DownloadManager.Request(resource);        request.setAllowedNetworkTypes(DownloadManager.Request.NETWORK_MOBILE                | DownloadManager.Request.NETWORK_WIFI);        request.setAllowedOverRoaming(false);        // 设置文件类型        MimeTypeMap mimeTypeMap = MimeTypeMap.getSingleton();        String mimeString = mimeTypeMap.getMimeTypeFromExtension(MimeTypeMap                .getFileExtensionFromUrl(appVersion.getApkUrl()));        request.setMimeType(mimeString);        // 在通知栏中显示        request.setNotificationVisibility(View.VISIBLE);        request.setVisibleInDownloadsUi(true);        request.setDestinationInExternalPublicDir(                "/" + appVersion.getFilePath() + "/", appVersion.getFileName());        request.setTitle("版本更新...");        long id = downloadManager.enqueue(request);        // 保存id        prefs.edit().putLong(DL_ID, id).commit();        // 注册广播监听下载        context.registerReceiver(receiver, new IntentFilter(                DownloadManager.ACTION_DOWNLOAD_COMPLETE));    }    private void installApk() {        Intent intent = new Intent(Intent.ACTION_VIEW);        intent.setDataAndType(Uri.fromFile(new File(apkAbsolutePath)),                "application/vnd.android.package-archive");        context.startActivity(intent);    }    private boolean isSdCardExist() {        return Environment.getExternalStorageState().equals(                Environment.MEDIA_MOUNTED);    }    private String getSDPath() {        if (isSdCardExist()) {            return Environment.getExternalStorageDirectory() + "/";        }        return null;    }    private boolean isFileExist(String path) {        return new File(path).exists();    }    private BroadcastReceiver receiver = new BroadcastReceiver() {        @Override        public void onReceive(Context context, Intent intent) {            DownloadManager.Query query = new DownloadManager.Query();            query.setFilterById(prefs.getLong(DL_ID, 0));            Cursor c = downloadManager.query(query);            if (c.moveToFirst()) {                int status = c.getInt(c                        .getColumnIndex(DownloadManager.COLUMN_STATUS));                switch (status) {                    case DownloadManager.STATUS_RUNNING:                        // 正在下载，不做任何事情                        listener.onDownloading();                        break;                    case DownloadManager.STATUS_SUCCESSFUL:                        // 下载完成首先取消注册广播，然后安装app                        listener.onSuccess();                        context.unregisterReceiver(receiver);                        installApk();                        break;                    case DownloadManager.STATUS_FAILED:                        // 下载失败 清除已下载的内容，重新下载                        context.unregisterReceiver(receiver);                        listener.onError("下载失败，请重试");                        downloadManager.remove(prefs.getLong(DL_ID, 0));                        prefs.edit().clear().commit();                        break;                }            }        }    };    /**     * app版本信息     *     * @author sunger     *     */    public static class AppVersion {        // apk下载url        private String apkUrl;        // apk最新版本        private String versionCode;        public String getVersionCode() {            return versionCode;        }        public void setVersionCode(String versionCode) {            this.versionCode = versionCode;        }        public String getFileName() {            return fileName;        }        public void setFileName(String fileName) {            this.fileName = fileName;        }        private String fileName;        public String getFilePath() {            return filePath;        }        public void setFilePath(String filePath) {            this.filePath = filePath;        }        /**         * 文件在sd卡的相对路径         */        private String filePath;        public String getApkUrl() {            return apkUrl;        }        public void setApkUrl(String apkUrl) {            this.apkUrl = apkUrl;        }    }    public interface OnUpdateListener {        /**         * 是否有新版本更新，如果为true这里开始调用         *         * @param has         */        void hasNewVersion(boolean has);        /**         * 正在开始下载         */        void onDownloading();        /**         * 下载完成，并且安装成功         */        void onSuccess();        /**         * 更新失败         *         * @param msg         *            失败的消息         */        void onError(String msg);    }}

   public void btnClick(View view) {        VersionManager.AppVersion version = new VersionManager.AppVersion();        // 设置文件url        version.setApkUrl("http://server.m.pp.cn/download/apk?query=%E6%AF%8F%E6%AD%A5%E8%BF%90%E5%8A%A8&ch=smweb&ch_src=sm&appId=6759470&custom=0&uc_param_str=frvecpeimintnidnut");        // 设置文件名        version.setFileName("new");        // 设置文件在sd卡的目录        version.setFilePath("update");        // 设置app当前版本号        version.setVersionCode(1.1 + "");        final VersionManager manager = VersionManager                .getInstance(MainActivity.this, version);        manager.setOnUpdateListener(new VersionManager.OnUpdateListener() {            @Override            public void onSuccess() {                Toast.makeText(MainActivity.this, "下载成功等待安装", Toast.LENGTH_SHORT).show();            }            @Override            public void onError(String msg) {                Toast.makeText(MainActivity.this, "更新失败", Toast.LENGTH_SHORT).show();            }            @Override            public void onDownloading() {                Toast.makeText(MainActivity.this, "正在下载...", Toast.LENGTH_SHORT).show();            }            @Override            public void hasNewVersion(boolean has) {                if (has) {                    Toast.makeText(MainActivity.this, "检测到有新版本", Toast.LENGTH_SHORT).show();                    manager.downLoad();                }            }        });        manager.checkUpdateInfo();    }