android 获取应用程序包名，图标，入口Activity类

public static int getVerCode(Context context) {  
    int verCode = -1;  
    try {  
        verCode = context.getPackageManager().getPackageInfo(  
                context.getPackageName(), 0).versionCode;  
    } catch (PackageManager.NameNotFoundException e) {  
        Log.e("msg", e.getMessage());  
    }  
    return verCode;  
}  
  
public static String getVerName(Context context) {  
    String verName = "";  
    try {  
        verName = context.getPackageManager().getPackageInfo(  
                context.getPackageName(), 0).versionName;  
    } catch (PackageManager.NameNotFoundException e) {  
        Log.e("msg", e.getMessage());  
    }  
    return verName;  
}</pre>另一种方法：  
<p></p>  
<pre name="code" class="java">public class Info {    
    Context context ;    
    PackageManager pm ;    
    public Info(Context context) {    
        this.context = context;    
        pm = context.getPackageManager();    
    }    
    /*  
     * 获取程序 图标  
     */    
    public Drawable getAppIcon(String packname){    
      try {    
             ApplicationInfo info = pm.getApplicationInfo(packname, 0);     
             return info.loadIcon(pm);    
        } catch (NameNotFoundException e) {    
            // TODO Auto-generated catch block    
            e.printStackTrace();    
              
        }    
    }    
        
    /*  
     *获取程序的版本号    
     */    
    public String getAppVersion(String packname){    
            
          try {    
              PackageInfo packinfo = pm.getPackageInfo(packname, 0);    
              return packinfo.versionName;    
            } catch (NameNotFoundException e) {    
                e.printStackTrace();    
                   
            }    
    }    
        
    
    /*  
     * 获取程序的名字   
     */    
    public String getAppName(String packname){    
          try {    
                 ApplicationInfo info = pm.getApplicationInfo(packname, 0);     
                 return info.loadLabel(pm).toString();    
            } catch (NameNotFoundException e) {    
                // TODO Auto-generated catch block    
                e.printStackTrace();    
                 
            }    
    }    
    /*  
     * 获取程序的权限  
     */    
    public String[] getAppPremission(String packname){    
          try {    
              PackageInfo packinfo =    pm.getPackageInfo(packname, PackageManager.GET_PERMISSIONS);    
              //获取到所有的权限     
              return packinfo.requestedPermissions;    
    
            } catch (NameNotFoundException e) {    
                e.printStackTrace();    
                   
            }    
    }    
        
        
    /*  
     * 获取程序的签名   
     */    
    public String getAppSignature(String packname){    
          try {    
              PackageInfo packinfo =    pm.getPackageInfo(packname, PackageManager.GET_SIGNATURES);    
              //获取到所有的权限     
              return packinfo.signatures[0].toCharsString();    
    
            } catch (NameNotFoundException e) {    
                e.printStackTrace();    
                  
            }    
    }