android - toast不能显示，求指教

这是小弟写的代码，在API10的手机运行无问题，但是在 API19的手机试运行时却无法在收到信息时显示toast，请问该怎么解决？小弟是初学者，请以简单的方式解释，最好能展示代码，万分感谢！

在网络上搜到应该添加
flag_include_stopped_packages
，请问该怎么添加？

IncomingSms.java

public class IncomingSms extends BroadcastReceiver {
final SmsManager sms = SmsManager.getDefault();

    public void onReceive(Context context,Intent intent) {
        final Bundle bundle = intent.getExtras();
        try {
            if (bundle != null) {
                final Object[] pdusObj = (Object[]) bundle.get("pdus");
                for (int i = 0; i < pdusObj.length; i++) {
                    SmsMessage currentMessage = SmsMessage.createFromPdu((byte[]) pdusObj[i]);
                    String message = currentMessage.getDisplayMessageBody();
                    String senderNum = currentMessage.getDisplayOriginatingAddress();
                    Log.i("SmsReceiver", senderNum + message);
                    Toast.makeText(context,
                            "send from " + senderNum + message, Toast.LENGTH_LONG).show();

                }
            }
        } catch (Exception e) {
            Log.e("SmsReceiver", "Exception smsReceiver" + e);
        }
    }
}

AndroidManifest.xml

SMS.java

public class SMS extends AppCompatActivity {



    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}