/**  
  * 返回当前程序版本名  
  */    
 public static String getAppVersionName(Context context) {    
     String versionName = "";    
    try {    
         // ---get the package info---    
        PackageManager pm = context.getPackageManager();    
         PackageInfo pi = pm.getPackageInfo(context.getPackageName(), 0);    
         versionName = pi.versionName;    
         versioncode = pi.versionCode;  
         if (versionName == null || versionName.length() <= 0) {    
             return "";    
         }    
     } catch (Exception e) {    
         Log.e("VersionInfo", "Exception", e);    
     }    
     return versionName;    
 }   

public static 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;  
}  

　　/** 
     * 手机系统版本 
     */  
    public static String getSdkVersion() {  
        return android.os.Build.VERSION.RELEASE;  
    } 
 　　/** 
     * 手机系统API level 
     */  
    public static int getSdkAPILevel() {  
        return android.os.Build.VERSION.SDK_INT;
    }