Android常用检查判断方法

来源：互联网发布：瞬间流泪的话知乎编辑：程序博客网时间：2024/06/05 18:07
自己工作中比较常用的一些判断检测。
import android.app.ActivityManager;import android.content.Context;import android.net.ConnectivityManager;import android.net.NetworkInfo;import android.os.Environment;import android.telephony.TelephonyManager;import java.io.File;import java.util.List;import java.util.regex.Matcher;import java.util.regex.Pattern;/** * Created by single on. */public class CheckUtils {    /**     * 判断字符串是否为Null或""     *     * @param str     * @return true=>Null或"";false=>不为Null或""     */    public static boolean strIsNull(String str) {        if (null != str && !"".equals(str))            return false;        return true;    }    /**     * 判断字符串是否为正整数     * +1, +2, +3……算作正整数     * 0,1.0,2.0,3.0……不算做正整数     *     * @param str     * @return true=>是;false=>不是     */    public static boolean strIsPositiveInteger(String str) {        if (strIsNull(str))            return false;        Pattern p = Pattern.compile("[1-9]\\d*");        Pattern p1 = Pattern.compile("\\+[1-9]\\d*");        Matcher m = p.matcher(str);        Matcher m1 = p1.matcher(str);        if (m.matches() || m1.matches())            return true;        return false;    }    /**     * 判断字符串是否为负整数     * 0,-1.0,-2.0,-3.0……不算做负整数     *     * @param str     * @return true=>是;false=>不是     */    public static boolean strIsNegativeInteger(String str) {        if (strIsNull(str))            return false;        Pattern p = Pattern.compile("-[1-9]\\d*");        Matcher m = p.matcher(str);        if (m.matches())            return true;        return false;    }    /**     * 判断字符串是否是整数     * +xxx,xxx,-xxx,+0,-0,0都算作整数     *     * @param str     * @return true=>是;false=>不是     */    public static boolean strIsInteger(String str) {        if (strIsNull(str))            return false;        Pattern p = Pattern.compile("((-|\\+)?[1-9]\\d*)|((-|\\+)?0)");        Matcher m = p.matcher(str);        if (m.matches())            return true;        return false;    }    /**     * 判断字符串是否为正浮点型（Float or Double）数据     * x.xx或+x.xx都算作正浮点数     * 0.0不算做正浮点数     *     * @param str     * @return true=>是;false=>不是     */    public static boolean strIsPositiveFloat(String str) {        if (strIsNull(str))            return false;        if (strIsPositiveInteger(str) || strIsNegativeInteger(str))            return false;        Pattern p = Pattern.compile("[1-9]\\d*.\\d*|0.\\d*[1-9]\\d*");        Pattern p1 = Pattern.compile("\\+([1-9]\\d*.\\d*|0.\\d*[1-9]\\d*)");        Matcher m = p.matcher(str);        Matcher m1 = p1.matcher(str);        if (m.matches() || m1.matches())            return true;        return false;    }    /**     * 判断字符串是否为负浮点型（Float or Double）数据     * -0.0不算做负浮点数     *     * @param str     * @return true=>是;false=>不是     */    public static boolean strIsNegativeFloat(String str) {        if (strIsNull(str))            return false;        if (strIsPositiveInteger(str) || strIsNegativeInteger(str))            return false;        Pattern p = Pattern.compile("-([1-9]\\d*.\\d*|0.\\d*[1-9]\\d*)");        Matcher m = p.matcher(str);        if (m.matches())            return true;        return false;    }    /**     * 判断字符串是否为数字     *     * @param str     * @return true=>是;false=>不是     */    public static boolean strIsNumber(String str) {        if (strIsNull(str))            return false;        if (strIsInteger(str) || strIsNegativeFloat(str) || strIsPositiveFloat(str))            return true;        return false;    }    /**     * 当前是否有网络连接     *     * @param context     * @return     */    public static boolean isNetwork(Context context) {        if (null != context) {            ConnectivityManager connectivityManager = (ConnectivityManager) context                    .getSystemService(Context.CONNECTIVITY_SERVICE);            NetworkInfo networkInfo = connectivityManager == null ? null : connectivityManager.getActiveNetworkInfo();            return networkInfo != null && networkInfo.isConnected();        }        return false;    }    /**     * 获取网络连接类型     *     * @param context     * @return     */    public static int getNetworkType(Context context) {        if (null != context) {            ConnectivityManager connectivityManager = (ConnectivityManager) context                    .getSystemService(Context.CONNECTIVITY_SERVICE);            NetworkInfo networkInfo = connectivityManager == null ? null : connectivityManager.getActiveNetworkInfo();            return networkInfo == null ? -1 : networkInfo.getType();        }        return -1;    }    /**     * 获取网络连接类型名称     * disconnect：断开连接，wifi:WIFI,eg:高速移动网络（3G）,2g，wap，wnknown:未知     *     * @param context     * @return     */    public static String getNetworkTypeName(Context context) {        if (null != context) {            ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);            NetworkInfo networkInfo;            String type = "disconnect";            if (manager == null || (networkInfo = manager.getActiveNetworkInfo()) == null) {                return type;            }            if (networkInfo.isConnected()) {                String typeName = networkInfo.getTypeName();                if ("WIFI".equalsIgnoreCase(typeName)) {                    type = "wifi";                } else if ("MOBILE".equalsIgnoreCase(typeName)) {                    String proxyHost = android.net.Proxy.getDefaultHost();                    type = strIsNull(proxyHost) ? (isFastMobileNetwork(context) ? "eg" : "2g")                            : "wap";                } else {                    type = "unknown";                }            }        }        return "unknown";    }    /**     * 是否是快速移动网络     *     * @param context     * @return     */    public static boolean isFastMobileNetwork(Context context) {        if (null != context) {            TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);            if (telephonyManager == null) {                return false;            }            switch (telephonyManager.getNetworkType()) {                case TelephonyManager.NETWORK_TYPE_1xRTT:                    return false;                case TelephonyManager.NETWORK_TYPE_CDMA:                    return false;                case TelephonyManager.NETWORK_TYPE_EDGE:                    return false;                case TelephonyManager.NETWORK_TYPE_EVDO_0:                    return true;                case TelephonyManager.NETWORK_TYPE_EVDO_A:                    return true;                case TelephonyManager.NETWORK_TYPE_GPRS:                    return false;                case TelephonyManager.NETWORK_TYPE_HSDPA:                    return true;                case TelephonyManager.NETWORK_TYPE_HSPA:                    return true;                case TelephonyManager.NETWORK_TYPE_HSUPA:                    return true;                case TelephonyManager.NETWORK_TYPE_UMTS:                    return true;                case TelephonyManager.NETWORK_TYPE_EHRPD:                    return true;                case TelephonyManager.NETWORK_TYPE_EVDO_B:                    return true;                case TelephonyManager.NETWORK_TYPE_HSPAP:                    return true;                case TelephonyManager.NETWORK_TYPE_IDEN:                    return false;                case TelephonyManager.NETWORK_TYPE_LTE:                    return true;                case TelephonyManager.NETWORK_TYPE_UNKNOWN:                    return false;                default:                    return false;            }        }        return false;    }    /**     * 判断当前应用是否运行在前台     *     * @param context     * @return true 前台     */    public static boolean isForeground(Context context) {        ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);        List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();        for (ActivityManager.RunningAppProcessInfo appProcess : appProcesses) {            if (appProcess.processName.equals(context.getPackageName())) {                if (appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_BACKGROUND) {                    return false;                } else {                    return true;                }            }        }        return true;    }    /**     * 检查SD卡是否存在     *     * @return     */    public static boolean isExistSDCard() {        if (Environment.getExternalStorageState().equals(                Environment.MEDIA_MOUNTED)) {            return true;        } else {            return false;        }    }    /**     * 检查文件是否存在     *     * @param path     * @return     */    public static boolean isExistFile(String path) {        try {            File f = new File(path);            if (!f.exists()) {                return false;            }        } catch (Exception e) {            return false;        }        return true;    }    /**     * 是否是手机号码     *     * @param mobile     * @return true:是     */    public static boolean isMobile(String mobile) {        Pattern p = Pattern                .compile("^((14[0-9])|(17[0-9])|(13[0-9])|(15[0-9])|(18[0-9]))\\d{8}$");        Matcher m = p.matcher(mobile);        return m.matches();    }    /**     * 是否是固定电话     *     * @param phone     * @return true：是     */    public static boolean isLandlineTelePhone(String phone) {        String str = "^((\\d{3,4}\\-)|)\\d{7,8}(|([-\\u8f6c]{1}\\d{1,5}))$";        Pattern p = Pattern.compile(str);        Matcher m = p.matcher(phone);        return m.matches();    }    /**     * 是否是邮政编码     *     * @param zipCode     * @return true:是     */    public static boolean isZipCode(String zipCode) {        String str = "^[1-9]\\d{5}$";        Pattern p = Pattern.compile(str);        Matcher m = p.matcher(zipCode);        return m.matches();    }    /**     * 是否是邮箱     *     * @param email     * @return true:是     */    public static boolean isEmail(String email) {        String str = "^([a-zA-Z0-9_\\-\\.]+)@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.)|(([a-zA-Z0-9\\-]+\\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\\]?)$";        Pattern p = Pattern.compile(str);        Matcher m = p.matcher(email);        return m.matches();    }    /**     * 一般昵称规则验证     * 是否由汉字字符数字下划线组成     *     * @param nick     * @return true:是     */    public static boolean isNickname(String nick) {        String str = "[\u4e00-\u9fa5_a-zA-Z0-9_]+";        Pattern p = Pattern.compile(str);        Matcher m = p.matcher(nick);        return m.matches();    }}
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