获取应用的当前版本号&获取当前android系统的版本号

获取当前应用的版本号：

   private String getVersionName() throws Exception

   {

           // 获取packagemanager的实例

           PackageManager packageManager = getPackageManager();

           // getPackageName()是你当前类的包名，0代表是获取版本信息

           PackageInfo packInfo = packageManager.getPackageInfo(getPackageName(),0);

           String version = packInfo.versionName;

           return version;

   }

获取当前系统的版本号：

 textView.setText("Product Model: " + android.os.Build.MODEL + ","

                + android.os.Build.VERSION.SDK + ","

                + android.os.Build.VERSION.RELEASE); 

或者

    /*

     *

     * Build.VERSION_CODES

        1 (0x00000001)           Android 1.0             BASE

        2 (0x00000002)           Android 1.1             BASE_1_1

        3 (0x00000003)           Android 1.5             CUPCAKE

        4 (0x00000004)           Android 1.6             DONUT

        5 (0x00000005)           Android 2.0             ECLAIR

        6 (0x00000006)           Android 2.0.1           ECLAIR_0_1

        7 (0x00000007)           Android 2.1             ECLAIR_MR1

        8 (0x00000008)           Android 2.2             FROYO

        9 (0x00000009)           Android 2.3             GINGERBREAD

        10 (0x0000000a)          Android 2.3.3           GINGERBREAD_MR1

        11 (0x0000000b)          Android 3.0             HONEYCOMB

        12 (0x0000000c)          Android 3.1             HONEYCOMB_MR1

        13 (0x0000000d)          Android 3.2             HONEYCOMB_MR2

        14 (0x0000000e)          Android 4.0             ICE_CREAM_SANDWICH

        15 (0x0000000f)          Android 4.0.3           ICE_CREAM_SANDWICH_MR1

        16 (0x00000010)          Android 4.1             JELLY_BEAN

        17 (0x00000011)          Android 4.2             JELLY_BEAN_MR1

        18 (0x00000012)          Android 4.3             JELLY_BEAN_MR2

        19 (0x00000013)          Android 4.4             KITKAT

    */

    /*获取当前系统的android版本号*/

    int currentapiVersion = android.os.Build.VERSION.SDK_INT;

获取应用的当前版本号&获取当前android系统的版本号