TelephonyUtil

package com.android.demo.lileidemo.utils;

import android.Manifest;
import android.content.Context;
import android.content.pm.PackageManager;
import android.support.v4.app.ActivityCompat;
import android.telephony.TelephonyManager;

import com.android.demo.lileidemo.MyApplication;
import com.android.demo.lileidemo.constant.AppConstants;
import com.demo.sync.basics.utils.LogUtil;

/**
 * date: 03/26/2020.
 * author: lilei.
 */
public class TelephonyUtil {
    private static final String TAG = AppConstants.APP_TAG + "TelephonyUtil ";
    private Context mContext;
    private static volatile TelephonyUtil mInstance;
    private TelephonyManager mTelephonyManager;

    public TelephonyUtil() {
        mContext = MyApplication.getAppContext();
        mTelephonyManager = (TelephonyManager)
            mContext.getSystemService(Context.TELEPHONY_SERVICE);
    }

    /**
     * get Instance.
     *
     * @return instance.
     */
    public static TelephonyUtil getInstance() {
        if (mInstance == null) {
            synchronized (TelephonyUtil.class) {
                if (mInstance == null) {
                    mInstance = new TelephonyUtil();
                }
            }
        }
        return mInstance;
    }

    public String getIccid() {
        if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            LogUtil.e(TAG + "getIccid need permission READ_PHONE_STATE!! please check!");
            return null;
        }
        String iccid = mTelephonyManager.getSimSerialNumber();
        return iccid;
    }

    public String getImei() {
        if (ActivityCompat.checkSelfPermission(mContext, Manifest.permission.READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) {
            // TODO: Consider calling
            LogUtil.e(TAG + "getIccid need permission READ_PHONE_STATE!! please check!");
            return null;
        }
        String imei = mTelephonyManager.getImei();
        return imei;
    }
}