Question

当我在真实设备上运行应用程序时，应用程序正在检索数据但不检索图像，但在模拟器上它运行良好并且还检索图像。以下是模拟器的屏幕截图以及真实设备的屏幕截图

下面是home.java代码 下面的代码是home.java，它显示数据，但在真实设备上没有图像，但在模拟器上工作正常。

    package com.food.sheenishere.stark;

import android.app.ProgressDialog;
import android.content.Intent;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.TextView;
import android.widget.Toast;

import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.food.sheenishere.stark.Common.Common;
import com.food.sheenishere.stark.Interface.ItemClickListener;
import com.food.sheenishere.stark.Model.Category;
import com.food.sheenishere.stark.ViewHolder.MenuViewHolder;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.squareup.picasso.Picasso;

public class home extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

    FirebaseDatabase database;
    DatabaseReference category;
    TextView txtFullName;


    RecyclerView recycler_menu;
    RecyclerView.LayoutManager layoutManager;
    private ProgressDialog progressDialog;
    FirebaseRecyclerAdapter<Category,MenuViewHolder> adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_home);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        toolbar.setTitle("Menu");
        setSupportActionBar(toolbar);
        progressDialog=new ProgressDialog(this);
        progressDialog.setMessage("Loading...");
        progressDialog.show();


        //init firebase
        database=FirebaseDatabase.getInstance();
        category=database.getReference("Category");




        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
               Intent cartIntent = new Intent(home.this, Cart.class);
                startActivity(cartIntent);
            }
        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
        //set name for user
        View headerView = navigationView.getHeaderView(0);
        txtFullName = (TextView)headerView.findViewById(R.id.txtFullName);
        txtFullName.setText(Common.currentUser.getName());





        //load menu
recycler_menu=(RecyclerView)findViewById(R.id.recycler_menu);
        recycler_menu.setHasFixedSize(true);
        layoutManager=new LinearLayoutManager(this);
        recycler_menu.setLayoutManager(layoutManager);

        loadMenu();
     //   progressDialog.dismiss();
    }

    private void loadMenu() {

        adapter =new FirebaseRecyclerAdapter<Category, MenuViewHolder>(Category.class,R.layout.menu_item,MenuViewHolder.class,category) {
            @Override
            protected void populateViewHolder(MenuViewHolder viewHolder, Category model, int position) {
               viewHolder.txtMenuName.setText(model.getName());
                Picasso.with(getBaseContext()).load(model.getImage())
                        .into(viewHolder.imageView);
                final Category clickItem = model;
progressDialog.dismiss();
                viewHolder.setItemClickListener(new ItemClickListener() {
                    @Override
                    public void OnClick(View view, int position, boolean isLongClick) {
                        //get category and send t new activity
                        Intent foodList=new Intent(home.this,FoodList.class);
                        //becox category id is key , so we just get key of this item
                        foodList.putExtra("CategoryId", adapter.getRef(position).getKey());
                        startActivity(foodList);
                    }
                });
            }
        };
        recycler_menu.setAdapter(adapter);

    }


    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

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

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {


        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_menu) {
            // Handle the camera action
        } else if (id == R.id.nav_cart) {
Intent cartIntent= new Intent(home.this,Cart.class);
            startActivity(cartIntent);
        } else if (id == R.id.nav_orders) {
            Intent orderIntent= new Intent(home.this,OrderStatus.class);
            startActivity(orderIntent);
        } else if (id == R.id.nav_log_out) {

       Intent signin = new Intent(home.this,SignIn.class);
            signin.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
            startActivity(signin);

        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

Answer 1

看起来您正在加载的图像具有高分辨率，因此当您将其加载到手机中时，Picasso无法处理它。

例如，如果您的图片分辨率为4000 * 4000并且您将其加载到屏幕分辨率为1080 * 1920的手机中，那么您只是在浪费资源，您应该调整图片大小以提高效率。

您应该考虑调整图片大小，如下所示：

 Picasso.with(getBaseContext()).load(model.getImage()).resize("some lower resolution like 500 * 500")
                    .into(viewHolder.imageView);

应用程序正在检索数据，但不是真实设备上的firebase中的图像

1 个答案: