Android 运行 时间权限 - onRequestPermissionsResult 回调未在 activity 中触发

Question

我正在尝试使用 SmsManager 发送短信。下面是我的代码，遵循 android 文档。但问题是，在按下权限 window 上的 DENY/ALLOW 按钮后，它不会触发 onRequestPermissionsResult 回调。我什至在 post 之一中根据某人的建议添加了 super.onRequestPermissionsResult。我已经通过设置断点在调试模式下使用日志语句进行了测试，但是根本没有调用 onRequestPermissionsResult。因此，即使在授予权限后，第一条短信也不会发出，"SMS sent. 1" 也不会显示。我错过了什么？什么情况下不触发回调？

private void sendSMSMessage() {
        phoneNo = "+919535000000";
        message = "Test SMS message";

        if (ContextCompat.checkSelfPermission(NewAppointment.this, Manifest.permission.SEND_SMS)
                != PackageManager.PERMISSION_GRANTED) {
            // Permission is not granted. Should we show an explanation?
            if (ActivityCompat.shouldShowRequestPermissionRationale(NewAppointment.this,
                    Manifest.permission.SEND_SMS)) {

                Toast.makeText(NewAppointment.this,
                        "Send SMS permission is needed to send notifications.", Toast.LENGTH_LONG).show();
            }
            // Request the permission
            ActivityCompat.requestPermissions(NewAppointment.this,
                    new String[]{Manifest.permission.SEND_SMS},
                    MY_PERMISSIONS_REQUEST_SEND_SMS);
        } else {
            // Permission has already been granted
            message = "Test SMS message 2";
            SmsManager smsManager = SmsManager.getDefault();
            smsManager.sendTextMessage(phoneNo, null, message, null, null);
            Toast.makeText(getApplicationContext(), "SMS sent. 2",
                    Toast.LENGTH_LONG).show();
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        Log.i(TAG,"In onRequestPermissionsResult callback ---> ");
        switch (requestCode) {
            case MY_PERMISSIONS_REQUEST_SEND_SMS: {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    // permission was granted, yay! Do the
                    // contacts-related task you need to do.
                    message = "Test SMS message 1";
                    SmsManager smsManager = SmsManager.getDefault();
                    smsManager.sendTextMessage(phoneNo, null, message, null, null);
                    Toast.makeText(getApplicationContext(), "SMS sent. 1",
                            Toast.LENGTH_LONG).show();
                } else {
                    // permission denied, boo! Disable the
                    // functionality that depends on this permission.
                    Toast.makeText(getApplicationContext(),
                            "SMS faild, please try again.", Toast.LENGTH_LONG).show();
                }
                return;
            }

            // other 'case' lines to check for other
            // permissions this app might request.
        }
    }

Answer 1

我的错误。 activity 甚至在触发 onRequestPermissionsResult 之前就被杀死了。对代码进行了更改，以便 activity 不会被杀死。