Question

import adapter.FeedListAdapter;
import app.AppController;
import data.FeedItem;


import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;


import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.annotation.SuppressLint;
import android.app.Activity;

import android.os.Bundle;


import android.view.Menu;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ListView;
import android.widget.Toast;

import com.android.volley.Cache;
import com.android.volley.Cache.Entry;
import com.android.volley.Request.Method;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.VolleyLog;
import com.android.volley.toolbox.JsonObjectRequest;

public class MainActivity extends Activity {
    private static final String TAG = MainActivity.class.getSimpleName();
    private ListView listView;
    private FeedListAdapter listAdapter;
    private List<FeedItem> feedItems;
    private String URL_FEED = "http://myozawoo.esy.es/data.php";
    private String URL_FEED2 = "http://api.androidhive.info/feed/feed.json";

//     String page = getIntent().getExtras().getString("page");
    @SuppressLint("NewApi")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 0);
        setContentView(R.layout.activity_main);

//        String page = getIntent().getExtras().getString("page");




        listView = (ListView) findViewById(R.id.list);

        feedItems = new ArrayList<FeedItem>();

        listAdapter = new FeedListAdapter(this, feedItems);
        listView.setAdapter(listAdapter);

        // These two lines not needed,
        // just to get the look of facebook (changing background color & hiding the icon)
//        getActionBar().setBackgroundDrawable(new ColorDrawable(Color.parseColor("#3b5998")));
//        getActionBar().setIcon(
//                new ColorDrawable(getResources().getColor(android.R.color.transparent)));

        // We first check for cached request
//        Cache cache = AppController.getInstance().getRequestQueue().getCache();

        // Page One
        String page = getIntent().getExtras().getString("page");
        if(page.equals("1")) {
            Cache cache = AppController.getInstance().getRequestQueue().getCache();
            Entry entry = cache.get(URL_FEED);
            if (entry != null) {
                // fetch the data from cache
                try {
                    String data = new String(entry.data, "UTF-8");
                    try {
                        parseJsonFeed(new JSONObject(data));
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }

            } else {
                // making fresh volley request and getting json
                JsonObjectRequest jsonReq = new JsonObjectRequest(Method.GET,
                        URL_FEED, null, new Response.Listener<JSONObject>() {

                    @Override
                    public void onResponse(JSONObject response) {
                        VolleyLog.d(TAG, "Response: " + response.toString());
                        if (response != null) {
                            parseJsonFeed(response);
                        }
                    }
                }, new Response.ErrorListener() {

                    @Override
                    public void onErrorResponse(VolleyError error) {
                        VolleyLog.d(TAG, "Error: " + error.getMessage());
                    }
                });

                // Adding request to volley request queue
                AppController.getInstance().addToRequestQueue(jsonReq);
            }
        }

        //Page Two

        else if (page.equals("2")) {
            Cache cache = AppController.getInstance().getRequestQueue().getCache();
            Entry entry = cache.get(URL_FEED2);
            if (entry != null) {
                // fetch the data from cache
                try {
                    String data = new String(entry.data, "UTF-8");
                    try {
                        parseJsonFeed(new JSONObject(data));
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }

            } else {
                // making fresh volley request and getting json
                JsonObjectRequest jsonReq = new JsonObjectRequest(Method.GET,
                        URL_FEED2, null, new Response.Listener<JSONObject>() {

                    @Override
                    public void onResponse(JSONObject response) {
                        VolleyLog.d(TAG, "Response: " + response.toString());
                        if (response != null) {
                            parseJsonFeed(response);
                        }
                    }
                }, new Response.ErrorListener() {

                    @Override
                    public void onErrorResponse(VolleyError error) {
                        VolleyLog.d(TAG, "Error: " + error.getMessage());
                    }
                });

                // Adding request to volley request queue
                AppController.getInstance().addToRequestQueue(jsonReq);
            }
        }

        // Other Four Pages
        else {
            Cache cache = AppController.getInstance().getRequestQueue().getCache();
                Entry entry = cache.get(URL_FEED);
                if (entry != null) {
                    // fetch the data from cache
                    try {
                        String data = new String(entry.data, "UTF-8");
                        try {
                            parseJsonFeed(new JSONObject(data));
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    } catch (UnsupportedEncodingException e) {
                        e.printStackTrace();
                    }

                } else {
                    // making fresh volley request and getting json
                    JsonObjectRequest jsonReq = new JsonObjectRequest(Method.GET,
                            URL_FEED, null, new Response.Listener<JSONObject>() {

                        @Override
                        public void onResponse(JSONObject response) {
                            VolleyLog.d(TAG, "Response: " + response.toString());
                            if (response != null) {
                                parseJsonFeed(response);
                            }
                        }
                    }, new Response.ErrorListener() {

                        @Override
                        public void onErrorResponse(VolleyError error) {
                            VolleyLog.d(TAG, "Error: " + error.getMessage());
                        }
                    });

                    // Adding request to volley request queue
                    AppController.getInstance().addToRequestQueue(jsonReq);
                }

        }



    }



    /**
     * Parsing json reponse and passing the data to feed view list adapter
     * */
    public void parseJsonFeed(JSONObject response) {
        try {
//            String page = getIntent().getExtras().getString("page");
//            if (page.equals("1"))
            JSONArray feedArray = response.getJSONArray("feed");

            for (int i = 0; i < feedArray.length(); i++) {
                JSONObject feedObj = (JSONObject) feedArray.get(i);

                final FeedItem item = new FeedItem();
                item.setId(feedObj.getInt("id"));
                item.setName(feedObj.getString("name"));

                // Image might be null sometimes
                String image = feedObj.isNull("image") ? null : feedObj
                        .getString("image");
                item.setImge(image);
                item.setStatus(feedObj.getString("status"));
                item.setProfilePic(feedObj.getString("profilePic"));
                item.setTimeStamp(feedObj.getString("timeStamp"));

                // url might be null sometimes
                String feedUrl = feedObj.isNull("url") ? null : feedObj
                        .getString("url");
                item.setUrl(feedUrl);

                feedItems.add(item);
            }

            // notify data changes to list adapater
            listAdapter.notifyDataSetChanged();
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }


}

我想在此课程中添加从右到左导航抽屉。如何将导航抽屉添加到此活动？谁来帮帮我！我无法在此活动上实现Navigation Drawer。 :-( 我希望你能帮助我。对不起，我的英文很差/

Answer 1

我在我的应用中遇到了同样的问题。我发现文档非常有用。还有一个示例应用程序，您可以从doc页面下载，它将帮助您了解如何正确实现它

http://developer.android.com/training/implementing-navigation/nav-drawer.html

希望有所帮助！

Answer 2

<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- The main content view -->
<FrameLayout
    android:id="@+id/content_frame"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />
<!-- The navigation drawer -->
<ListView android:id="@+id/right_drawer"
    android:layout_width="240dp"
    android:layout_height="match_parent"
    android:layout_gravity="end"
    android:choiceMode="singleChoice"
    android:divider="@android:color/transparent"
    android:dividerHeight="0dp"
    android:background="#111"/>
</android.support.v4.widget.DrawerLayout>

将layout_gravity定义为end，使其位于非阿拉伯语手机的右侧。如果您希望它在右侧粘滞，请使用right

导航抽屉（从右到左）

2 个答案: