import android.annotation.SuppressLint;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.telephony.TelephonyManager;

/**
 * Created by admin on 2017/11/7.
 */

public class AppInfo {

    /**
     * 获取包名
     * @return 包名, appid
     */
    public static String getPackageName(Context context) {
        try {
            PackageInfo pi = context.getPackageManager().
                    getPackageInfo(context.getPackageName(), 0);
            return pi.packageName;
        } catch (PackageManager.NameNotFoundException e) {
            return null;
        }
    }

    /**
     * 获取版本号
     * @return 版本号
     */
    public static String getVersionName(Context context) {
        try {
            PackageInfo pi = context.getPackageManager().
                    getPackageInfo(context.getPackageName(), 0);
            return pi.versionName;
        } catch (PackageManager.NameNotFoundException e) {
            return null;
        }
    }

    /**
     * 获取版本代码
     * @return 版本代码
     */
    public static int getVersionCode(Context context) {
        try {
            PackageInfo pi = context.getPackageManager().
                    getPackageInfo(context.getPackageName(), 0);
            return pi.versionCode;
        } catch (PackageManager.NameNotFoundException e) {
            return -1;
        }
    }

    /**
     * 获取手机IMEI
     * @param context
     * @return
     */
    @SuppressLint({"MissingPermission", "HardwareIds"})
    public static final String getIMEI(Context context) {
        String imei = "";
        try {
            TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
            imei = telephonyManager.getDeviceId();
                if (imei == null) {
                    imei = "0";
                }
                return imei;
        } catch (Exception e) {
            e.printStackTrace();
            return "0";
        }
    }
}