Memory-leak-solution-for-unregister-broadcast-receiver.java

public class GoodActivity extends AppCompatActivity {

    private BroadcastReceiver mBroadcastReceiver;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_first);
         mBroadcastReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                //your receiver code goes here!
            }
        };
    }
    
    @Override
    protected void onStart() {
        super.onStart();
        registerReceiver(mBroadcastReceiver, new IntentFilter("SmsMessage.intent.MAIN"));
    }    

    @Override
    protected void onStop() {
        super.onStop();
        if(mBroadcastReceiver != null) {
            unregisterReceiver(mBroadcastReceiver);
        }
    }
}