apk的下载和安装

进入页面直接弹出版本对话框

MainActivity.this.runOnUiThread(new Runnable() {    @Override    public void run() {        dialog();    }});

//实现对画框

private void dialog() {    if (status == 1) {        new AlertDialog.Builder(this)                .setIcon(R.mipmap.ic_launcher_round)                .setTitle("发现新版本")                .setMessage(msg)                //升级按钮                .setPositiveButton("升级", new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialogInterface, int i) {                        downLoadApk();                        //创建通知.                        createNotification(MainActivity.this);                        Toast.makeText(MainActivity.this, "开始升级", Toast.LENGTH_SHORT).show();                    }                })                //取消按钮                .setNegativeButton("取消", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface dialogInterface, int i) {                Toast.makeText(MainActivity.this, "请及时升级到最新版本", Toast.LENGTH_SHORT).show();            }        }).create().show();    } else {        Toast.makeText(this, "当前版本是" + latest, Toast.LENGTH_SHORT).show();    }}//下载后文件保存的目录.private String downLoadPath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/downloads/";private void downLoadApk() {    //创建请求参数    RequestParams requestParams = new RequestParams(url);    requestParams.setSaveFilePath(downLoadPath + "nihao");    x.http().request(HttpMethod.GET, requestParams, new org.xutils.common.Callback.ProgressCallback<File>() {        @Override        public void onSuccess(File file) {        }        @Override        public void onError(Throwable throwable, boolean b) {        }        @Override        public void onCancelled(CancelledException e) {        }        @Override        public void onFinished() {        }        @Override        public void onWaiting() {        }        @Override        public void onStarted() {        }        //total:文件总大小,current,当前进度.isDownloading,是否正在下载.        @Override        public void onLoading(long total, long current, boolean isDownloading) {            notifyNotification(current, total);            if (total == current) {//若下载完成                mBuilder.setContentText("下载完成");                mNotifyManager.notify(10086, mBuilder.build());                //安装apk文件                installApk(MainActivity.this,new File(downLoadPath,"nihao"));            }        }    });}// 创建通知栏进度条private void createNotification(Context context) {    mNotifyManager = (NotificationManager) context.getSystemService(NOTIFICATION_SERVICE);    mBuilder = new NotificationCompat.Builder(context);    mBuilder.setSmallIcon(R.mipmap.ic_launcher_round);    mBuilder.setContentTitle("版本更新");    mBuilder.setContentText("正在下载...");    mBuilder.setProgress(0, 0, false);    Notification notification = mBuilder.build();    notification.flags = Notification.FLAG_AUTO_CANCEL;    //参数1:通知id,参数:通知.    mNotifyManager.notify(10086, notification);}/** * 更新通知栏进度条 */private void notifyNotification(long percent, long length) {    mBuilder.setProgress((int) length, (int) percent, false);    mNotifyManager.notify(10086, mBuilder.build());}/** * 安装apk * * @param context 上下文 * @param file    APK文件 */private void installApk(Context context, File file) {    Intent intent = new Intent();    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);    intent.setAction(Intent.ACTION_VIEW);    intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");    context.startActivity(intent);}