Android 常用方法集合工具类CommonUtil

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public class CommonUtil {    /**     * 判断当前网络是否连接     *      * @param context     * @return     */    public static boolean isNetConnected(Context context) {        ConnectivityManager connectivityManager = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo info = connectivityManager.getActiveNetworkInfo();        if (info != null && info.isConnected()) {            return true;        }        return false;    }    /**     * dip 转 px     *      * @param context     * @param dipValue     * @return     */    public static int dip2px(Context context, float dipValue) {        final float scale = context.getResources().getDisplayMetrics().density;        return (int) (dipValue * scale + 0.5f);    }    /**     * px 转 dip     *      * @param context     * @param pxValue     * @return     */    public static int px2dip(Context context, float pxValue) {        final float scale = context.getResources().getDisplayMetrics().density;        return (int) (pxValue / scale + 0.5f);    }    /**     * 判断服务是否运行     *      * @param context     * @param clazz     *            要判断的服务的class     * @return     */    public static boolean isServiceRunning(Context context, Class<? extends Service> clazz) {        ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);        List<RunningServiceInfo> services = manager.getRunningServices(100);        for (int i = 0; i < services.size(); i++) {            String className = services.get(i).service.getClassName();            if (className.equals(clazz.getName())) {                return true;            }        }        return false;    }    /**     * 把汉字转换成拼音     * @param inputString     * @return     */    public static String getPinYin(String inputString) {        HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat();        format.setCaseType(HanyuPinyinCaseType.LOWERCASE);        format.setToneType(HanyuPinyinToneType.WITH_TONE_MARK);        format.setVCharType(HanyuPinyinVCharType.WITH_U_UNICODE);        char[] input = inputString.trim().toCharArray();        StringBuffer output = new StringBuffer("");        try {            for (int i = 0; i < input.length; i++) {                if (Character.toString(input[i]).matches("[//u4E00-//u9FA5]+")) {                    String[] temp = PinyinHelper.toHanyuPinyinStringArray(input[i], format);                    output.append(temp[0]);                    output.append(" ");                } else                    output.append(Character.toString(input[i]));            }        } catch (BadHanyuPinyinOutputFormatCombination e) {            e.printStackTrace();        }        return output.toString();    }    /**     * 得到拼音里的首字母     * @param inputString     * @return     */    public static String getFirstAlpha(String inputString) {        if (inputString != null) {            String[] array = PinyinHelper.toHanyuPinyinStringArray(inputString.charAt(0));            if (array == null) {                return inputString.substring(0, 1).toUpperCase();            } else {                return array[0].toUpperCase();            }        }        return "";    }    public static String getDateFormat(long time) {        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        return sdf.format(new Date(time));    }    /**     * 加密     * @param inStr     * @return     */    public static String string2MD5(String inStr) {        MessageDigest md5 = null;        try {            md5 = MessageDigest.getInstance("MD5");        } catch (Exception e) {            System.out.println(e.toString());            e.printStackTrace();            return "";        }        char[] charArray = inStr.toCharArray();        byte[] byteArray = new byte[charArray.length];        for (int i = 0; i < charArray.length; i++)            byteArray[i] = (byte) charArray[i];        byte[] md5Bytes = md5.digest(byteArray);        StringBuffer hexValue = new StringBuffer();        for (int i = 0; i < md5Bytes.length; i++) {            int val = ((int) md5Bytes[i]) & 0xff;            if (val < 16)                hexValue.append("0");            hexValue.append(Integer.toHexString(val));        }        return hexValue.toString();    }}
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