在Android上获取应用程序安装日期

Question

是否有办法在Android设备上找到“安装应用程序的日期”。

广泛搜索，但无法找到相关答案。

通过PackageManager documentation / Code无法找到有关安装应用程序的日期的任何信息。

Answer 1

或者这个（API等级9以上！）：

long installed = context
    .getPackageManager()
    .getPackageInfo(context.getPackag‌​eName(), 0)
    .firstInstallTime
;

Answer 2

使用此代码：

PackageManager pm = context.getPackageManager();
ApplicationInfo appInfo = pm.getApplicationInfo("app.package.name", 0);
String appFile = appInfo.sourceDir;
long installed = new File(appFile).lastModified();

Answer 3

尝试其中之一

/**
 * The time at which the app was first installed. Units are as per currentTimeMillis().
 * @param context
 * @return
 */
public static long getAppFirstInstallTime(Context context){
    PackageInfo packageInfo;
    try {
    if(Build.VERSION.SDK_INT>8/*Build.VERSION_CODES.FROYO*/ ){
        packageInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
        return packageInfo.firstInstallTime;
    }else{
        //firstinstalltime unsupported return last update time not first install time
        ApplicationInfo appInfo = context.getPackageManager().getApplicationInfo(context.getPackageName(), 0);
        String sAppFile = appInfo.sourceDir;
        return new File(sAppFile).lastModified();
    }
    } catch (NameNotFoundException e) {
    //should never happen
    return 0;
    }
}

Answer 4

First Time It Was Installed

activity.getPackageManager().getPackageInfo( activity.getPackageName(), 0 ).firstInstallTime;

Last Time It Was Updated

activity.getPackageManager().getPackageInfo( activity.getPackageName(), 0 ).lastUpdateTime;

Answer 5

此方法以字符串格式返回安装日期，如12/25/2016 10:38:02：

  private String getInstallDate() {
        // get app installation date

        PackageManager packageManager =  getActivity().getPackageManager();
        long installTimeInMilliseconds; // install time is conveniently provided in milliseconds

        Date installDate = null;
        String installDateString = null;

        try {
            PackageInfo packageInfo = packageManager.getPackageInfo(getActivity().getPackageName(), 0);
            installTimeInMilliseconds = packageInfo.firstInstallTime;
            installDateString  = MiscUtilities.getDate(installTimeInMilliseconds, "MM/dd/yyyy hh:mm:ss");
        }
        catch (PackageManager.NameNotFoundException e) {
            // an error occurred, so display the Unix epoch
            installDate = new Date(0);
            installDateString = installDate.toString();
        }

        return installDateString;
    }

MiscUtilities

/**
 * Return date in specified format.
 *
 * @param milliSeconds Date in milliseconds
 * @param dateFormat   Date format
 * @return String representing date in specified format
 * <p>
 * Date myDate = MiscUtilities.getDate(82233213123L, "dd/MM/yyyy hh:mm:ss.SSS");
 */
public static String getDate(long milliSeconds, String dateFormat) {
    // Create a DateFormatter object for displaying date in specified format.
    SimpleDateFormat formatter = new SimpleDateFormat(dateFormat);

    // Create a calendar object that will convert the date and time value in milliseconds to date.
    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(milliSeconds);
    return formatter.format(calendar.getTime());
}