在 Android 上獲取應用程序安裝日期

Question

有沒有辦法在 Android 設備上找出“安裝應用程序的日期”。

進行了廣泛搜索，但無法找到相關答案。

通過PackageManager文檔/代碼安裝應用程序時無法找到有關日期的任何信息。

Answer 1

或者這個（ API 9 級以上！）：

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

Answer 2

使用此代碼：

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

Answer 3

第一次安裝

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

上次更新時間

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

Answer 4

嘗試其中之一

/**
 * 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 5

此方法以字符串格式返回安裝日期，例如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;
    }

雜項公用事業

/**
 * 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());
}

Answer 6

public long getInstallDateInMilliseconds() {
    long installDate;
    try {
        installDate = context.getPackageManager()
                      .getPackageInfo(context.getPackageName(),0)
                      .firstInstallTime;
    } catch (PackageManager.NameNotFoundException e) {
        installDate = Calendar.getInstance().getTimeInMillis();
    }
    return installDate;
}