次元画社(六)，版本迭代的实现

/**
 * @Title:DownAPKService.java
 * @Description:专用下载APK文件Service工具类,通知栏显示进度,下载完成震动提示,并自动打开安装界面(配合xUtils快速开发框架)
 *
 * 需要添加权限：
 * <uses-permission android:name="android.permission.INTERNET" />
 * <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 * <uses-permission android:name="android.permission.VIBRATE" />
 *
 * 需要在<application></application>标签下注册服务
 *
 * 可以在142行代码：builder.setSmallIcon(R.drawable.ic_launcher);中修改自己应用的图标
 */

public class DownAPKService extends Service {
    private final int NotificationID = 0x10000;
    private NotificationManager mNotificationManager = null;
    private NotificationCompat.Builder builder;
    private HttpHandler<File> mDownLoadHelper;
    // 文件下载路径
    private String APK_url = "";
    // 文件保存路径(如果有SD卡就保存SD卡,如果没有SD卡就保存到手机包名下的路径)
    private String APK_dir = "";
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }
    @Override
    public void onCreate() {
        super.onCreate();
        initAPKDir();// 创建保存路径
    }
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        System.out.println("onStartCommand");
        // 接收Intent传来的参数:
        APK_url = intent.getStringExtra("apk_url");

        DownFile(APK_url, APK_dir + "cyhs.apk");

        return super.onStartCommand(intent, flags, startId);
    }
    private void initAPKDir() {
        /**
         * 创建路径的时候一定要用[/],不能使用[\],但是创建文件夹加文件的时候可以使用[\].
         * [/]符号是Linux系统路径分隔符,而[\]是windows系统路径分隔符 Android内核是Linux.
         */
        if (isHasSdcard())// 判断是否插入SD卡
        {
            APK_dir = Environment.getExternalStorageDirectory().getAbsolutePath() + "/Cyhs/download/";// 保存到SD卡路径下
        }
        else{
            APK_dir = getApplicationContext().getFilesDir().getAbsolutePath() + "/Cyhs/download/";// 保存到app的包名路径下
        }
        File destDir = new File(APK_dir);
        if (!destDir.exists()) {// 判断文件夹是否存在
            destDir.mkdirs();
        }
    }
    /**
     *
     * @Description:判断是否插入SD卡
     */
    private boolean isHasSdcard() {
        String status = Environment.getExternalStorageState();
        if (status.equals(Environment.MEDIA_MOUNTED)) {
            return true;
        } else {
            return false;
        }
    }
    private void DownFile(String file_url, String target_name) {
        mDownLoadHelper = new HttpUtils().download(file_url, target_name, true, true, new RequestCallBack<File>() {
            @Override
            public void onStart() {
                super.onStart();
                System.out.println("(●'◡'●)开始下载文件");
                mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
                builder = new NotificationCompat.Builder(getApplicationContext());
                builder.setSmallIcon(R.drawable.llogo);
                builder.setTicker("ε=ε=(~￣▽￣)~正在下载新版本");
                builder.setContentTitle(getApplicationName());
                builder.setContentText(";-)正在下载,请稍后...");
                builder.setNumber(0);
                builder.setAutoCancel(true);
                mNotificationManager.notify(NotificationID, builder.build());
            }
            @Override
            public void onLoading(long total, long current, boolean isUploading) {
                super.onLoading(total, current, isUploading);
                System.out.println("文件下载中");
                int x = Long.valueOf(current).intValue();
                int totalS = Long.valueOf(total).intValue();
                builder.setProgress(totalS, x, false);
                builder.setContentInfo(getPercent(x, totalS));
                mNotificationManager.notify(NotificationID, builder.build());
            }
            @Override
            public void onSuccess(ResponseInfo<File> responseInfo) {
                System.out.println("o(*￣▽￣*)o文件下载完成");
                Intent installIntent = new Intent(Intent.ACTION_VIEW);
                System.out.println(responseInfo.result.getPath());
                Uri uri = Uri.fromFile(new File(responseInfo.result.getPath()));
                installIntent.setDataAndType(uri, "application/vnd.android.package-archive");
                installIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                PendingIntent mPendingIntent = PendingIntent.getActivity(DownAPKService.this, 0, installIntent, 0);
                builder.setContentText("下载完成,请点击安装");
                builder.setContentIntent(mPendingIntent);
                mNotificationManager.notify(NotificationID, builder.build());
                // 震动提示
                Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
                vibrator.vibrate(1000L);// 参数是震动时间(long类型)
                stopSelf();
                startActivity(installIntent);// 下载完成之后自动弹出安装界面
                mNotificationManager.cancel(NotificationID);
            }
            @Override
            public void onFailure(HttpException error, String msg) {
                System.out.println("文件下载失败"+msg);
                if (msg.equals("maybe the file has downloaded completely"))
                    Toast.makeText(getApplicationContext(), "(＠_＠;)可能已经下载过了", Toast.LENGTH_SHORT).show();
                mNotificationManager.cancel(NotificationID);
                Toast.makeText(getApplicationContext(), "⊙﹏⊙∥下载失败，请检查网络！", Toast.LENGTH_SHORT).show();
            }
            @Override
            public void onCancelled() {
                super.onCancelled();
                System.out.println("O(∩_∩)O下载完成了哟");
                mDownLoadHelper.cancel();
            }
        });
    }
    /**
     *
     * @param x
     *            当前值
     * @param total
     *            总值
     * [url=home.php?mod=space&uid=7300]@return[/url] 当前百分比
     * @Description:返回百分之值
     */
    private String getPercent(int x, int total) {
        String result = "";// 接受百分比的值
        double x_double = x * 1.0;
        double tempresult = x_double / total;
        // 百分比格式，后面不足2位的用0补齐 ##.00%
        DecimalFormat df1 = new DecimalFormat("0.00%");
        result = df1.format(tempresult);
        return result;
    }
    /**
     * @return
     * @Description:获取当前应用的名称
     */
    private String getApplicationName() {
        PackageManager packageManager = null;
        ApplicationInfo applicationInfo = null;
        try {
            packageManager = getApplicationContext().getPackageManager();
            applicationInfo = packageManager.getApplicationInfo(getPackageName(), 0);
        } catch (PackageManager.NameNotFoundException e) {
            applicationInfo = null;
        }
        String applicationName = (String) packageManager.getApplicationLabel(applicationInfo);
        return applicationName;
    }
    @Override
    public void onDestroy() {
        super.onDestroy();
        stopSelf();
    }
}

Intent intent = new Intent(TestActivity.this, DownAPKService.class);
intent.putExtra("apk_url", StaticData.getApkServer());
startService(intent);