英文:
i want to make realtime changing data On RecyclerView
问题
I'm trying to refresh the data every 1 second in my RecyclerView. I'm using an API, and when there's a change in the API data, I want to update my RecyclerView without using the swiper. Alternatively, I want to simulate a swiper swipe every 1 second. Here's my code:
public class InformationNow extends AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener {
private RequestQueue requestQueue;
private SwipeRefreshLayout refresh;
private ArrayList<TrashCanModel> trashCanModels = new ArrayList<>();
private JsonArrayRequest arrayRequest;
private Dialog dialog;
private RecyclerView recyclerView;
private InformationNowAdapter informationNowAdapter;
private String url = "http://192.168.1.34:9090/TrashCanData/lastrow";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_information_now);
refresh = (SwipeRefreshLayout) findViewById(R.id.Swiper);
recyclerView = (RecyclerView) findViewById(R.id.Now);
dialog = new Dialog(this);
refresh.setOnRefreshListener(this);
refresh.post(new Runnable() {
@Override
public void run() {
trashCanModels.clear();
getData();
}
});
// ... (other code)
}
private void getData() {
// ... (getData implementation)
}
private void adapterPush(ArrayList<TrashCanModel> trashCanModels) {
// ... (adapterPush implementation)
}
@Override
public void onRefresh() {
trashCanModels.clear();
getData();
}
}
public class InformationNowAdapter extends RecyclerView.Adapter<InformationNowAdapter.MyViewHolder> {
// ... (InformationNowAdapter implementation)
}
If you want to refresh the data every 1 second, you can use a Handler to achieve this. Here's how you can modify your InformationNow class to achieve the desired behavior:
public class InformationNow extends AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener {
// ... (other member variables)
private Handler handler = new Handler();
private Runnable refreshRunnable = new Runnable() {
@Override
public void run() {
trashCanModels.clear();
getData();
handler.postDelayed(this, 1000); // Refresh every 1 second
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
// ... (onCreate implementation)
handler.postDelayed(refreshRunnable, 1000); // Start refreshing
}
// ... (other methods)
}
This code will refresh the data every 1 second by calling the getData() method and updating the RecyclerView. The refresh cycle will continue until you stop it manually.
英文:
I'am trying to make refresh every 1 sec in my RecyclerView but i don't know how can i do it iam using my API , when something changed in my api i want to make that change in my RecylerView whitout the swiper or i want to make the swiper swipe every 1 sec .. so this is my Code :
public class InformationNow extends AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener {
private RequestQueue requestQueue;
private SwipeRefreshLayout refresh;
private ArrayList<TrashCanModel> trashCanModels = new ArrayList<>();
private JsonArrayRequest arrayRequest;
private Dialog dialog;
private RecyclerView recyclerView;
private InformationNowAdapter informationNowAdapter ;
private String url = "http://192.168.1.34:9090/TrashCanData/lastrow";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_information_now);
refresh = (SwipeRefreshLayout) findViewById(R.id.Swiper);
recyclerView = (RecyclerView) findViewById(R.id.Now);
dialog = new Dialog(this);
refresh.setOnRefreshListener(this);
refresh.post(new Runnable() {
@Override
public void run() {
trashCanModels.clear();
getData();
}
});
}
private void getData() {
refresh.setRefreshing(true);
arrayRequest = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
JSONObject jsonObject = null;
for (int i = 0; i < response.length(); i++) {
try {
//JSONArray jsonArray = response.getJSONArray("users");
jsonObject = response.getJSONObject(i);
TrashCanModel cat = new TrashCanModel();
cat.setDistance(jsonObject.getInt("distance"));
cat.setTemperature(jsonObject.getInt("temperature"));
cat.setHumidity(jsonObject.getInt("humidity"));
Log.e("*********", cat.getDistance().toString());
Log.e("*********", cat.getTemperature().toString());
Log.e("*********", cat.getHumidity().toString());
trashCanModels.add(cat);
} catch (JSONException e) {
e.printStackTrace();
}
}
adapterPush(trashCanModels);
refresh.setRefreshing(false);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
});
requestQueue = Volley.newRequestQueue(InformationNow.this);
requestQueue.add(arrayRequest);
}
private void adapterPush(ArrayList<TrashCanModel> trashCanModels) {
informationNowAdapter = new InformationNowAdapter(this, trashCanModels);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(informationNowAdapter);
}
@Override
public void onRefresh() {
trashCanModels.clear();
getData();
}
}
and my adapter :
public class InformationNowAdapter extends RecyclerView.Adapter<InformationNowAdapter.MyViewHolder>{
private Context context ;
private ArrayList<TrashCanModel> trashCanModels;
private String url = "";
//
public InformationNowAdapter (Context context , ArrayList<TrashCanModel> trashCanModels) {
this.context = context;
this.trashCanModels=trashCanModels;
}
@NonNull
@Override
public InformationNowAdapter.MyViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
View view ;
LayoutInflater layoutInflater = LayoutInflater.from(context);
view = layoutInflater.inflate(R.layout.trashcan_list , parent , false);
return new InformationNowAdapter.MyViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull InformationNowAdapter.MyViewHolder holder, int position) {
//holder.id.setText("#"+String.valueOf(position+1));
holder.distance.setText(trashCanModels.get(position).getDistance().toString());
holder.temperature.setText(trashCanModels.get(position).getTemperature().toString());
holder.humidity.setText(trashCanModels.get(position).getHumidity().toString());
}
@Override
public int getItemCount() {
return trashCanModels.size();
}
public class MyViewHolder extends RecyclerView.ViewHolder {
private TextView distance , temperature , humidity ;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
distance = (TextView) itemView.findViewById(R.id.distance);
temperature = (TextView) itemView.findViewById(R.id.temperature);
humidity = (TextView) itemView.findViewById(R.id.humidity);
//
}
}
}
so how can i make refresh data every 1 sec !
答案1
得分: 1
可以使用 Timer 来实现这个功能。
Timer repeatTask = new Timer();
repeatTask.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
trashCanModels.clear();
getData();
}
}, 0, 1000);
当你想要停止时，调用 repeatTask.cancel()。
但我认为在 API 发生变化时，你应该使用推送通知，或者使用 Firebase 或 Socket.io 来替代。
英文:
You can use Timer to do that
Timer repeatTask = new Timer();
repeatTask.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
trashCanModels.clear();
getData();
}
}, 0, 1000);
call repeatTask.cancel() when you want to stop
But I think you should use push notification when your api change or use firebase or socket.io instead
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