如何将日期和时间中的时间戳转换为android中的firebase并显示?

时间:2019-06-18 20:16:27

标签: android firebase firebase-realtime-database timestamp

我需要显示Firebase实时数据库中的时间戳。我尝试使用一些我看到的示例来完成此操作,但是它对我没有任何标记,并且我不知道如何下载日期以及如何格式化该日期以使其可见。这是我的代码,我想知道我应该在哪一部分工作以及如何发送它以显示在TextView中。

Array-Fedd

public class Feed {


public String   tipo_feed;

public Boolean is_gratis;

public String   imagen_feed;

public String   costo_pdf;

public String   url_tipo;

public String   imagen_admin;

public String   nombre_admin;

public String timestamp;

public String  descripcion;




public Feed(String tipo_feed, Boolean is_gratis, String imagen_feed, String costo_pdf, String url_tipo, String imagen_admin, String nombre_admin, String timestamp, String descripcion) {
    this.tipo_feed = tipo_feed;
    this.is_gratis = is_gratis;
    this.imagen_feed = imagen_feed;
    this.costo_pdf = costo_pdf;
    this.url_tipo = url_tipo;
    this.imagen_admin = imagen_admin;
    this.nombre_admin = nombre_admin;
    this.timestamp = timestamp;
    this.descripcion = descripcion;
}

public Feed(){}

public String getTipo_feed() {
    return tipo_feed;
}

public void setTipo_feed(String tipo_feed) {
    this.tipo_feed = tipo_feed;
}

public Boolean getIs_gratis() {
    return is_gratis;
}

public void setIs_gratis(Boolean is_gratis) {
    this.is_gratis = is_gratis;
}

public String getImagen_feed() {
    return imagen_feed;
}

public void setImagen_feed(String imagen_feed) {
    this.imagen_feed = imagen_feed;
}

public String getCosto_pdf() {
    return costo_pdf;
}

public void setCosto_pdf(String costo_pdf) {
    this.costo_pdf = costo_pdf;
}

public String getUrl_tipo() {
    return url_tipo;
}

public void setUrl_tipo(String url_tipo) {
    this.url_tipo = url_tipo;
}

public String getImagen_admin() {
    return imagen_admin;
}

public void setImagen_admin(String imagen_admin) {
    this.imagen_admin = imagen_admin;
}

public String getNombre_admin() {
    return nombre_admin;
}

public void setNombre_admin(String nombre_admin) {
    this.nombre_admin = nombre_admin;
}

public String getTimestamp() {
    return timestamp;
}

public void setTimestamp(String timestamp) {
    this.timestamp = timestamp;
}

public String getDescripcion() {
    return descripcion;
}

public void setDescripcion(String descripcion) {
    this.descripcion = descripcion;
}
 }

AdapterFeed.java

public class AdapterFeed extends RecyclerView.Adapter<AdapterFeed.FeedViewHolder>
    implements View.OnClickListener{

AdapterFeed adapterFeed;

private View.OnClickListener listener;
ArrayList<Feed> feeds;
URL imageURL = null;
HttpURLConnection connection = null;
static DBProvider dbProvider;



Bitmap bm = null;
private static final String TAG = "BAJARINFO:";

public static class FeedViewHolder extends RecyclerView.ViewHolder{


    ImageView imgAdmin,imgFeed;
    TextView txtNombreAdmin;
    TextView txtDescripcion;
    TextView txtPrecio;

    TextView txtTimeStamp;


    TextView txtTipoFeed;
    TextView urlTipo;
    Boolean isGratis;

    public FeedViewHolder (View itemView) {
        super(itemView);

        imgAdmin=itemView.findViewById(R.id.imgPostPersona);
        imgFeed=itemView.findViewById(R.id.imagPostU);

        txtNombreAdmin=itemView.findViewById(R.id.txtNombrePost);
        txtDescripcion=itemView.findViewById(R.id.txtDescripcionPost);
        txtPrecio=itemView.findViewById(R.id.txtTipoPostPrecio);
        txtTimeStamp=itemView.findViewById(R.id.txtTiempoPost);
        txtTipoFeed=itemView.findViewById(R.id.btnPostTipo);
        isGratis=false;


    }

}

public AdapterFeed(ArrayList<Feed>feeds){

    this.feeds=feeds;
}

@Override
public AdapterFeed.FeedViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

    View v= LayoutInflater.from(parent.getContext()).inflate(R.layout.usuario_14_diseno,null,false);
    v.setOnClickListener(this);

    AdapterFeed.FeedViewHolder holder=new AdapterFeed.FeedViewHolder(v);
    return holder;
}


@Override
public void onBindViewHolder(@NonNull AdapterFeed.FeedViewHolder holder, int position) {
    Feed feed = feeds.get(position);



    holder.txtNombreAdmin.setText(feed.getNombre_admin());
    holder.txtDescripcion.setText(feed.getDescripcion());
    holder.txtPrecio.setText(feed.getCosto_pdf());
    holder.txtTipoFeed.setText(feed.getTipo_feed());



    //In this textView I want to put the Timestamp

    holder.txtTimeStamp.setText(feed.getTimestamp());




}



@Override
public int getItemCount() {
    return feeds.size();
}


public void setOnClickListener(View.OnClickListener listener) {



    this.listener = listener;
}


@Override
public void onClick(View v) {
    if (listener!=null){
        listener.onClick(v);
    }
}


 }

UsarioHome.java

public class UsuarioHome  extends AppCompatActivity {

ImageButton imgPlan,imgPerfil,imgChat,imgHome;

static DBProvider dbProvider;
BajarInfo bajarInfo;
private static final String TAG = "BAJARINFO:";

AdapterFeed adapterFeed;
ArrayList<Feed> feeds;

RecyclerView recyclerView;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.usuario_14_feed);


    bajarFeed();

    dbProvider = new DBProvider();
    bajarInfo = new BajarInfo();

    imgPlan=findViewById(R.id.imgPlan);
    imgPerfil=findViewById(R.id.imgPerfil);
    imgChat=findViewById(R.id.imgChat);

    imgHome=findViewById(R.id.imgHome);

    imgPlan.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            Intent intent = new Intent(UsuarioHome.this, UsuarioPlan.class);
            startActivity(intent);

        }
    });

    imgPerfil.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(UsuarioHome.this, UsuarioPerfil.class);
            startActivity(intent);
        }
    });

    imgChat.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(UsuarioHome.this, UsuarioChat.class);
            startActivity(intent);

        }
    });

    imgChat.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(UsuarioHome.this, UsuarioChat.class);
            startActivity(intent);

        }
    });

    imgHome.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent(UsuarioHome.this, DetallePdf.class);
            startActivity(intent);

        }
    });



    recyclerView=findViewById(R.id.recyclerview);
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    feeds=new ArrayList<>();
    adapterFeed=new AdapterFeed(feeds);
    recyclerView.setAdapter(adapterFeed);


    adapterFeed.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            if(feeds.get(recyclerView.getChildAdapterPosition(view)).getTipo_feed().equals(Contants.VIDEO)){

                Intent intent = new Intent(UsuarioHome.this, Video.class);

                startActivity(intent);
            }

           else if(feeds.get(recyclerView.getChildAdapterPosition(view)).getTipo_feed().equals(Contants.IMAGEN)){

                Intent intent = new Intent(UsuarioHome.this, Imagen.class);
                startActivity(intent);
            }

            else if(feeds.get(recyclerView.getChildAdapterPosition(view)).getTipo_feed().equals(Contants.PDF)){

                if (feeds.get(recyclerView.getChildAdapterPosition(view)).getIs_gratis()){
                    Intent intent = new Intent(UsuarioHome.this, DetallePdf.class);
                    startActivity(intent);
                }
                else {
                    Intent intent = new Intent(UsuarioHome.this, PantallaPDF.class);
                    intent.putExtra("ViewType","internet");
                    startActivity(intent);

                }

            }

            else {

                Toast.makeText(UsuarioHome.this, "hola", Toast.LENGTH_SHORT).show();

            }


        }
    });


}

public void bajarFeed(){

      //feeds.removeAll(feeds);

    dbProvider = new DBProvider();
    dbProvider.tablaFeed().addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(@NonNull DataSnapshot dataSnapshot) {



            if (dataSnapshot.exists()) {
                for (DataSnapshot snapshot : dataSnapshot.getChildren()) {
                    Log.e(TAG, "Feed: " + dataSnapshot);
                    Feed feed = snapshot.getValue(Feed.class);


                    feeds.add(feed);
                    adapterFeed.notifyDataSetChanged();



                }
            }
            else {
                Log.e(TAG, "Feed: ");
            }
        }

        @Override
        public void onCancelled(@NonNull DatabaseError databaseError) {
            Log.e(TAG, "ERROR: ");
        }
    });

}



 }

0 个答案:

没有答案