[Android]暗码机制

<intent-filter>
	<action android:name="android.provider.Telephony.SECRET_CODE"/>
	<data android:host="368222" android:scheme="android_secret_code"/>
</intent-filter>

/**
 * Handles secret codes to launch arbitrary activities in the form of *#*#<code>#*#*.
 *
 * @param context the context to use
 * @param input the text to check for a secret code in
 * @return true if a secret code was encountered and handled
 */
static boolean handleSecretCode(Context context, String input) {
  // Secret codes are accessed by dialing *#*#<code>#*#*

  int len = input.length();
  if (len <= 8 || !input.startsWith("*#*#") || !input.endsWith("#*#*")) {
    return false;
  }
  String secretCode = input.substring(4, len - 4);
  TelephonyManagerCompat.handleSecretCode(context, secretCode);
  return true;
}

/**
 * Handles secret codes to launch arbitrary activities.
 *
 * @param context the context to use
 * @param secretCode the secret code without the "*#*#" prefix and "#*#*" suffix
 */
public static void handleSecretCode(Context context, String secretCode) {
  // Must use system service on O+ to avoid using broadcasts, which are not allowed on O+.
  if (BuildCompat.isAtLeastO()) {
    context.getSystemService(TelephonyManager.class).sendDialerSpecialCode(secretCode);
  } else {
    // System service call is not supported pre-O, so must use a broadcast for N-.
    Intent intent =
        new Intent(SECRET_CODE_ACTION, Uri.parse("android_secret_code://" + secretCode));
    context.sendBroadcast(intent);
  }
}

public class SecretCodeReceiver extends BroadcastReceiver {

    private static final String TAG = "SecretCodeReceiver";

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        Log.d(TAG, "Action = " + action);

        Intent i = new Intent(Intent.ACTION_MAIN);
        i.setClass(context, MainActivity.class);
        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(i);

    }
}

<receiver android:name="com.xx.receiver.SecretCodeReceiver">
	<intent-filter>
	<action android:name="android.provider.Telephony.SECRET_CODE"/>
	<data android:host="368222" android:scheme="android_secret_code"/>
	</intent-filter>
</receiver>