Question

我想在我的应用程序中实现RSS阅读器我想在listview中显示新闻以及相应的图像。

主要活动

    package piestudio.opinion;

import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
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.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 com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.common.api.GoogleApiClient;

public class MainActivity extends AppCompatActivity
        implements  NavigationView.OnNavigationItemSelectedListener {


    /**
     * ATTENTION: This was auto-generated to implement the App Indexing API.
     * See https://g.co/AppIndexing/AndroidStudio for more information.
     */
    private GoogleApiClient client;

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

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
        // ATTENTION: This was auto-generated to implement the App Indexing API.
        // See https://g.co/AppIndexing/AndroidStudio for more information.
        client = new GoogleApiClient.Builder(this).addApi(AppIndex.API).build();
    }

    @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) {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        final NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        Fragment fragment;
        FragmentManager fragmentManager = getFragmentManager();
        int id = item.getItemId();


        if (id == R.id.toi) {


             fragment = new FragmentOne();
             FragmentTransaction ft= getFragmentManager().beginTransaction();
            ft.replace(R.id.content_frame, fragment,"Times of India");
            ft.commit();

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

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



            }
    return  true;
    }

        }

FragmentOne.java

    package piestudio.opinion;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * Created by jene on 7/4/2016.
 */
public class FragmentOne extends Fragment {



    public FragmentOne() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_one, container, false);
    }

}

Fragment One是我希望我的列表视图显示的片段请详细指导我，比如要制作什么样的布局，我也创建了 RSSfeed类。我在各种网站上搜索过，但没有找到任何相关答案:)

Answer 1

发布您的RSSfeed课程，因为到目前为止，没有人能够知道您已实施的内容。

您基本上想从互联网上下载数据。您需要在另一个线程上异步下载而不是阻止UI线程（避免冻结UI）。使用AsyncTask类来实现这一点。可以在此处找到许多使用AsyncTask的示例。

下一步是解析下载的XML。您可以使用不同的类来执行此操作。我会关注官方Android guide。

完成解析所需的Feed后，您只需显示它即可。我会选择ListView，但这完全是您的选择。

这是我自己实现它的方法，我建议，因为你了解这些东西是如何工作的。另一方面，您可以使用一些library

最好的方法是（对于begginer）自己实现它，同时查看库源代码。

如何在我的应用程序中实现RSS阅读器（新闻）？

1 个答案: