Esa2gjk1dh1k Basics: instructions for mqtt package encapsulated by Android

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In order to avoid repetition, this section uses the works of the previous section as the works of this section

The current project mentioned later is the project of this section

First, copy the mymqttclient in the app source code in the first section of the test to the current project

Second, in the source code, the IMEI of the mobile phone is used as the ClientID of mqtt. Copy the IMEI in the source code to obtain the IMEI

Code to current project

public static String TelephonyIMEI = "";//获取手机IMEI

TelephonyIMEI = getTelephonyIMEI(getApplicationContext());//获取手机 IMEI

/*获取手机IMEI号*/
    private String getTelephonyIMEI(Context context) {
        String id = "IMEI";
        TelephonyManager mTelephony = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
        if (ContextCompat.checkSelfPermission(context, Manifest.permission.READ_PHONE_STATE) == PackageManager.PERMISSION_GRANTED) {
            if (mTelephony.getdeviceid() != null) {
                id = mTelephony.getdeviceid();
            }
        }
        else {
            id = Settings.Secure.getString(context.getApplicationContext().getContentResolver(), Settings.Secure.ANDROID_ID);
        }
        return id;
    }

3、 Add permissions

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