Question

为什么我的模拟器上会得到不同的结果？如果使用模拟器 API23 ，则在RecyclerView上不会显示对服务器的数据检索。但是，如果我使用 API19 的模拟器，那么结果会按照我的意愿出现。

我的代码中是否应该专门为此API23添加？因为我只使用INTERNET权限（已添加到AndroidManifest）作为此应用程序的一个示例。

请看这个结果

如上所示，如果我使用API模拟器23没有错误，数据就不会出现在屏幕模拟器上。我试过一个真正的设备，结果是相同的

如果我使用模拟器API19

但是当我使用模拟器API19时，数据也出现在屏幕上

我试过一个真实的设备，结果数据很好地显示在这个API19上。

我该怎么办？ API 23有什么特殊处理吗？在这里，我无法找到解决方案。请帮忙

MainActivity

start_urls

HomeFragment

class DmozSpider(scrapy.Spider):
    name = 'dmoz'
    allowed_domains = ['dmoz.org']
    start_urls = ['http://www.dmoz.org/Computers/Programming/Languages/Python/Books/']

ChannelAdapter

package com.transvision.bertho.transvisiondashboardapp;

import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.NavigationView;
import android.support.design.widget.Snackbar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
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.view.View;
import android.widget.Toast;

import com.onesignal.OneSignal;

import cn.pedant.SweetAlert.SweetAlertDialog;
import page.DefaultFragment;
import page.HomeFragment;
import page.ProfileFragment;

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener {

    private static final String TAG = MainActivity.class.getSimpleName();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        OneSignal.startInit(this).init();

        setContentView(R.layout.activity_main);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });

        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);

        Fragment fragment = null;
        fragment = new DefaultFragment();
        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
        fragmentTransaction.replace(R.id.root, fragment);
        fragmentTransaction.commit();

        new SweetAlertDialog(this, SweetAlertDialog.SUCCESS_TYPE)
                .setTitleText("Good job!")
                .setContentText("You clicked the button!")
                .show();

    }

    @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.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);
    }

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

        Fragment fragment = null;
        String title = getString(R.string.app_name);

        if (id == R.id.nav_camera) {
            fragment = new HomeFragment();
            title = "Home";
        } else if (id == R.id.nav_gallery) {
            fragment = new ProfileFragment();
            title = "Profile";
        } else if (id == R.id.nav_slideshow) {

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

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

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

        }

        if (fragment != null) {
            FragmentManager fragmentManager = getSupportFragmentManager();
            FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
            fragmentTransaction.replace(R.id.root, fragment);
            fragmentTransaction.commit();

            getSupportActionBar().setTitle(title);
        }

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


    public void showToast(String output){
        Toast.makeText(this.getBaseContext(), output, Toast.LENGTH_SHORT).show();
    }

}

频道

package page;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.Fragment;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Toast;

import com.transvision.bertho.transvisiondashboardapp.R;

import java.util.ArrayList;
import java.util.List;

import adapter.ChannelAdapter;
import butterknife.Bind;
import butterknife.ButterKnife;
import model.Channel;
import model.ChannelResponse;
import rest.ApiClient;
import rest.ApiInterface;
import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;


public class HomeFragment extends Fragment implements SwipeRefreshLayout.OnRefreshListener {

    @Bind(R.id.movies_recycler_view) RecyclerView recyclerView;
    @Bind(R.id.swipe_layout) SwipeRefreshLayout swipeRefreshLayout;

    private static final String TAG = HomeFragment.class.getSimpleName();

    private ChannelAdapter adapter;
    List<Channel> listChannel;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_home, container, false);
        ButterKnife.bind(this, rootView);

        listChannel = new ArrayList<>();

        setUpSwipeLayout();
        setUpAdapter();
        setUpRecyclerview();

        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                load();
            }
        }, 500);

        return rootView;
    }

    protected void setUpSwipeLayout()
    {
        swipeRefreshLayout.setColorSchemeResources(R.color.colorPrimary, R.color.colorAccent);
        swipeRefreshLayout.setOnRefreshListener(this);
    }

    private void setUpAdapter(){
        if(adapter == null){
            adapter = new ChannelAdapter(listChannel, R.layout.list_channel, getActivity());
        }
    }

    private void setUpRecyclerview(){
        recyclerView.clearOnScrollListeners();
        recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
        recyclerView.setAdapter(adapter);
    }

    private void load(){
        swipeRefreshLayout.setRefreshing(true);
        ApiInterface apiService = ApiClient.getChannel().create(ApiInterface.class);
        Call<ChannelResponse> call = apiService.getItems();

        call.enqueue(new Callback<ChannelResponse>() {
            @Override
            public void onResponse(Call<ChannelResponse> call, Response<ChannelResponse> response) {

                listChannel = response.body().getItems();
                adapter = new ChannelAdapter(listChannel, R.layout.list_channel, getActivity());
                recyclerView.setAdapter(adapter);
                recyclerView.clearOnScrollListeners();
                recyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
                adapter.notifyDataSetChanged();

                Log.e(TAG, "CONNECTION SUCCESS");
                swipeRefreshLayout.setRefreshing(false);
            }

            @Override
            public void onFailure(Call<ChannelResponse> call, Throwable t) {
                Log.e(TAG, t.toString());
                showToast("CONNECTION ERROR");
                swipeRefreshLayout.setRefreshing(false);
            }
        });
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
    }

    @Override
    public void onDetach() {
        super.onDetach();
    }

    public void showToast(String output){
        Toast.makeText(getActivity(), output, Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onRefresh() {
        load();
    }
}

使用API23和API19在仿真器中使用RecyclerView时的结果不同

0 个答案:

使用API​​23和API19在仿真器中使用RecyclerView时的结果不同

0 个答案:

使用API23和API19在仿真器中使用RecyclerView时的结果不同