获取应用及系统的版本号

http://www.cnblogs.com/qsl568/archive/2012/03/14/2395636.html

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*/
    /*获取当前系统的android版本号*/
    int currentapiVersion=android.os.Build.VERSION.SDK_INT;