Question

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'char[] java.lang.String.toCharArray()' on a null object reference

Answer 1

您好，建议您1.检查许可路径是否正确，注意使用

Environment.setLicensePath(android.os.Environment.getExternalStorageDirectory().getAbsolutePath()+"/SuperMap/license/");

其中路径的最后为许可文件所在文件夹名称+“/”；

2.确认是否给到设备存储读取权限，您可以使用

private void requestPermissions() { //Android6.0以上设备设置动态权限
    if (Build.VERSION.SDK_INT >= 23) {
        // 检查是否拥有权限
        String[] permissions = {
                Manifest.permission.WRITE_EXTERNAL_STORAGE,
                Manifest.permission.ACCESS_FINE_LOCATION,
                Manifest.permission.READ_PHONE_STATE,
                Manifest.permission.ACCESS_WIFI_STATE,
                Manifest.permission.ACCESS_NETWORK_STATE,
                Manifest.permission.CHANGE_WIFI_STATE,
        };
        String permission = null;
        int id = 0;
        boolean isBreak = false;
        int checkCallPhonePermission = 0;
        for (int i = 0; i < permissions.length; i++) {
            permission = permissions[i];
            checkCallPhonePermission = checkSelfPermission(permission);
            if (checkCallPhonePermission != PackageManager.PERMISSION_GRANTED) {
                requestPermissions(permissions, id);
                isBreak = true;
                break;
            }
        }
    }
}并在

super.onCreate(savedInstanceState);之后调用该方法；

希望可以帮助到您。