如何獲取最新安裝的android版本的日期？

Question

當用戶在智能手機上安裝他的最新Android版本時，我想獲取日期和時間（並不那麼重要）。 我在谷歌搜索和在Android參考中看過，但didn'f找到這樣的事情。

我的第一個想法是類android.os.BUILD但沒有什麼。

android.od.BUILD.Time只是Build編譯的日期。

感謝您的幫助！

Answer 1

private void getAppInstallTime(){ 
PackageManager pm = getApplicationContext().getPackageManager(); 
     try { 
      PackageInfo info = pm.getPackageInfo("com.example.sample", 0); 
      Field field = PackageInfo.class.getField("firstInstallTime"); 
      long timestamp = field.getLong(info); 
      Date date = new Date(timestamp); 
      Log.e("DATE", date + "InMillies "+timestamp); 
      ApplicationInfo appInfo = pm.getApplicationInfo("com.example.sample", 0); 
    String appFile = appInfo.sourceDir; 
    long installed = new File(appFile).lastModified(); 
    Date dateMod = new Date(installed); 
    Log.e("Updates","Updated Time"+dateMod+" time in millies"+installed); 
     } catch (NameNotFoundException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } catch (SecurityException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } catch (IllegalArgumentException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } catch (NoSuchFieldException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } catch (IllegalAccessException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } 
} 
}