判断是否为平板方法

  /**
	 * 判断是否为平板
	 * 
	 * @return
	 */
	 public static boolean isPad(Context context) {
	 WindowManager wm = (WindowManager) context
	 .getSystemService(Context.WINDOW_SERVICE);
	 Display display = wm.getDefaultDisplay();
	 // 屏幕宽度
	 float screenWidth = display.getWidth();
	 // 屏幕高度
	 float screenHeight = display.getHeight();
	 DisplayMetrics dm = new DisplayMetrics();
	 display.getMetrics(dm);
	 double x = Math.pow(dm.widthPixels / dm.xdpi, 2);
	 double y = Math.pow(dm.heightPixels / dm.ydpi, 2);
	 // 屏幕尺寸
	 double screenInches = Math.sqrt(x + y);
	 // 大于6尺寸则为Pad
	 if (screenInches >= PAD_SCREEN_INCHES) {
	 return true;
	 }
	 return false;
	 }
   
   
   
  /**
	 * 判断是否为平板 这里的TelephonyManager在SDK里有如下几种： 
	 * 
	 * SIM_STATE_ABSENT 
	 * SIM_STATE_NETWORK_LOCKED 
	 * SIM_STATE_PIN_REQUIRED 
	 * SIM_STATE_PUK_REQUIRED  
	 * SIM_STATE_READY 
	 * SIM_STATE_UNKNOWN 
	 * 
	 * @param context
	 * @return
	 */
	public static boolean isPad(Context context) {
		TelephonyManager telephony = (TelephonyManager) context
				.getSystemService(Context.TELEPHONY_SERVICE);
		int type = telephony.getSimState();
		Log.i(TAG, "current devices type:" + type);
		//没有SIP卡或者无法判断设备默认不给提供打电话功能
		if (type == TelephonyManager.SIM_STATE_ABSENT || type == TelephonyManager.SIM_STATE_UNKNOWN ) {
			return true;
		} else {
			return false;
		}
	}
  
  
   public boolean isTabletDevice() {
        TelephonyManager telephony = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
        int type = telephony.getPhoneType();
        if (type == TelephonyManager.PHONE_TYPE_NONE) {
            Log.i("is Tablet!");
        } else {
            Log.i("is phone!");
        }
        return false;
    }
    
    这里的PhoneType在SDK里有如下几种：

    PHONE_TYPE_NONE
    PHONE_TYPE_GSM
    PHONE_TYPE_CDMA
    PHONE_TYPE_SIP