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