字符串按指定字节数截取、隐藏与显示输入软键盘、收起状态栏以及判断服务是否运行功能代码段

来源：互联网发布：出世入世知乎编辑：程序博客网时间：2024/06/05 14:35

1、字符串中指定字节数截取，以及多余部分显示方式

/*** 获取字节长度* */public static int getWordCount(String s) {s = s.replaceAll("[^\\x00-\\xff]", "**");int length = s.length();return length;}/*** * Description:长度超过3个汉字（6个字符）字符串，自动截取前三个字，多于的已省略号...标识** @param str  要截取的字符串* @param n  截取的字节数* @return*/public static String getFormatString(String str,int n)    {            //格式化字符串长度，超出部分显示省略号,区分汉字跟字母。汉字2个字节，字母数字一个字节            String temp = "";            if(getWordCount(str)<=n)//如果长度比需要的长度n小,返回原字符串            {                 return str;            }            else{                    int t=0;                    char[] q = str.toCharArray();                    for(int i=0;i<q.length&&t<=n;i++)                    {                    if((int)q[i]>=0x4e00 && (int)q[i]<=0x9fa5)//是否汉字                            {                                                             t += 2;                            }                         else {                               t++;                            }//                     if (t <= n) {//判断如果此时字符数大于要求显示的字符数n，是否取该汉字                    temp += q[i];// }                                        }                    return (temp+"...");            }    } }

2、隐藏与显示输入软键盘

/**     * 隐藏界面输入软键盘     *      * @param activity     */    public static void hideSoftInputFromWindow(final Activity activity) {        activity.runOnUiThread(new Runnable() {            @Override            public void run() {                InputMethodManager imm = (InputMethodManager) activity                        .getSystemService(Context.INPUT_METHOD_SERVICE);                if (imm != null) {                    View view = activity.getCurrentFocus();                    if (view != null) {                        imm.hideSoftInputFromWindow(view.getWindowToken(),                                InputMethodManager.HIDE_NOT_ALWAYS);                    }                }            }        });    }    /**     * 显示界面输入键盘     *      * @param activity     */    public static void showSoftInputFromWindow(final Activity activity) {        activity.runOnUiThread(new Runnable() {            @Override            public void run() {                InputMethodManager imm = (InputMethodManager) activity                        .getSystemService(Context.INPUT_METHOD_SERVICE);                if (imm != null) {                    View view = activity.getCurrentFocus();                    if (view != null) {                        LogUtil.d("showSoftInput");                        imm.showSoftInput(view, InputMethodManager.SHOW_IMPLICIT);                    }                }            }        });    }

3、收起状态栏的解决方法

/*** 收起状态栏* * @param context*            上下文对象* @return 成功收起状态栏返回true,否则返回false*/public static boolean collapseStatusBar(Context context) {Object statusbarService = context.getSystemService("statusbar");if (statusbarService == null) {return false;}try {Class<?> statusBarManager = Class.forName("android.app.StatusBarManager");if (statusBarManager == null) {return false;}Method collapseMethod;if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {collapseMethod = statusBarManager.getMethod("collapsePanels");} else {collapseMethod = statusBarManager.getMethod("collapse");}if (collapseMethod == null) {return false;}collapseMethod.invoke(statusbarService);} catch (Exception e) {e.printStackTrace();return false;}return true;}}

4、判断服务是否运行功能

/**     * 用来判断服务是否运行.     *      * @param context     * @param className     *            判断的服务名字     * @return true 在运行 false 不在运行     */    public static boolean isServiceRunning(Context mContext, String className) {        boolean isRunning = false;        ActivityManager activityManager = (ActivityManager) mContext                .getSystemService(Context.ACTIVITY_SERVICE);        List<ActivityManager.RunningServiceInfo> serviceList = activityManager                .getRunningServices(Integer.MAX_VALUE);        if (!(serviceList.size() > 0)) {            return false;        }        String name = "";        String process = "";        for (int i = 0; i < serviceList.size(); i++) {            name = serviceList.get(i).service.getClassName();            process = serviceList.get(i).process;            if (name.equals(className) == true) {                if (process                        .startsWith(BizConstant.NET_PHONE_ACCOUNT_TYPE + ":")) {                    isRunning = true;                    break;                }            }        }        return isRunning;    }

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