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Firnds Ich bin mit Android Volley-Bibliothek Daten von json zu holenAndroid Volley Listview OnClickListener
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UpcomingJourney.java
package com.mssinfotech.dropjourney;
import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
import com.android.volley.Cache;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.VolleyLog;
import com.android.volley.toolbox.JsonObjectRequest;
import com.mssinfotech.dropjourney.adapter.UpcommingJourneyListAdapter;
import com.mssinfotech.dropjourney.app.AppController;
import com.mssinfotech.dropjourney.data.FeedItem;
import com.mssinfotech.dropjourney.data.UpcommingJourneyFeedItem;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
public class UpcomingJourney extends ActionBarActivity {
private static final String TAG = UpcomingJourney.class.getSimpleName();
private ListView listView;
private UpcommingJourneyListAdapter listAdapter;
private List<UpcommingJourneyFeedItem> feedItems;
private DBHelper mydb;
private static String id="";
private String URL_FEED = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mydb = new DBHelper(this);
Cursor MyData = mydb.getMyData();
MyData.moveToFirst();
id = MyData.getString(MyData.getColumnIndex("id"));
setContentView(R.layout.activity_upcoming_journey);
Toolbar mActionBarToolbar = (Toolbar) findViewById(R.id.toolbar_actionbar);
mActionBarToolbar.setTitle("Up-comming Journey");
setSupportActionBar(mActionBarToolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
URL_FEED = CommonUtilities.API_URL+"?type=DriverUpcommingJourney&vid="+id;
listView = (ListView) findViewById(R.id.list);
feedItems = new ArrayList<UpcommingJourneyFeedItem>();
listAdapter = new UpcommingJourneyListAdapter(this, feedItems);
listView.setAdapter(listAdapter);
listView.setFastScrollEnabled(true);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
Toast.makeText(getApplicationContext(),"You clicked"+position,Toast.LENGTH_SHORT).show();
}
});
// We first check for cached request
Cache cache = AppController.getInstance().getRequestQueue().getCache();
Cache.Entry entry = cache.get(URL_FEED);
Log.d("url mss",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(Request.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);
}
}
private void parseJsonFeed(JSONObject response) {
try {
JSONArray feedArray = response.getJSONArray("feed");
String ststus=response.getString("status");
if(ststus.equals("success")) {
for (int i = 0; i < feedArray.length(); i++) {
JSONObject feedObj = (JSONObject) feedArray.get(i);
UpcommingJourneyFeedItem item = new UpcommingJourneyFeedItem();
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();
}
}else{
LinearLayout layone= (LinearLayout) this.findViewById(R.id.errorImage);// change id here
layone.setVisibility(View.VISIBLE);
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}
UpcommingJourneyListAdapter.java
package com.mssinfotech.dropjourney.adapter;
import com.mssinfotech.dropjourney.FeedImageView;
import com.mssinfotech.dropjourney.R;
import com.mssinfotech.dropjourney.app.AppController;
import com.mssinfotech.dropjourney.data.UpcommingJourneyFeedItem;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.text.Html;
import android.text.TextUtils;
import android.text.format.DateUtils;
import android.text.method.LinkMovementMethod;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.NetworkImageView;
public class UpcommingJourneyListAdapter extends BaseAdapter {
private Activity activity;
private LayoutInflater inflater;
private List<UpcommingJourneyFeedItem> feedItems;
ImageLoader imageLoader = AppController.getInstance().getImageLoader();
public UpcommingJourneyListAdapter(Activity activity, List<UpcommingJourneyFeedItem> feedItems) {
this.activity = activity;
this.feedItems = feedItems;
}
@Override
public int getCount() {
return feedItems.size();
}
@Override
public Object getItem(int location) {
return feedItems.get(location);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (inflater == null)
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.feed_item, null);
if (imageLoader == null)
imageLoader = AppController.getInstance().getImageLoader();
TextView name = (TextView) convertView.findViewById(R.id.name);
TextView timestamp = (TextView) convertView.findViewById(R.id.timestamp);
TextView statusMsg = (TextView) convertView.findViewById(R.id.txtStatusMsg);
TextView url = (TextView) convertView.findViewById(R.id.txtUrl);
NetworkImageView profilePic = (NetworkImageView) convertView.findViewById(R.id.profilePic);
FeedImageView feedImageView = (FeedImageView) convertView
.findViewById(R.id.feedImage1);
UpcommingJourneyFeedItem item = feedItems.get(position);
name.setText(item.getName());
// Converting timestamp into x ago format
CharSequence timeAgo = DateUtils.getRelativeTimeSpanString(
Long.parseLong(item.getTimeStamp()),
System.currentTimeMillis(), DateUtils.SECOND_IN_MILLIS);
timestamp.setText(timeAgo);
// Chcek for empty status message
if (!TextUtils.isEmpty(item.getStatus())) {
statusMsg.setText(item.getStatus());
statusMsg.setVisibility(View.VISIBLE);
} else {
// status is empty, remove from view
statusMsg.setVisibility(View.GONE);
}
// Checking for null feed url
if (item.getUrl() != null) {
url.setText(Html.fromHtml("<a href=\"" + item.getUrl() + "\">" + item.getUrl() + "</a> "));
// Making url clickable
url.setMovementMethod(LinkMovementMethod.getInstance());
url.setVisibility(View.VISIBLE);
} else {
// url is null, remove from the view
url.setVisibility(View.GONE);
}
// user profile pic
profilePic.setImageUrl(item.getProfilePic(), imageLoader);
// Feed image
if (item.getImge() != null) {
feedImageView.setImageUrl(item.getImge(), imageLoader);
feedImageView.setVisibility(View.VISIBLE);
feedImageView
.setResponseObserver(new FeedImageView.ResponseObserver() {
@Override
public void onError() {
}
@Override
public void onSuccess() {
}
});
} else {
feedImageView.setVisibility(View.GONE);
}
return convertView;
}
}
AppController.java
package com.mssinfotech.dropjourney.app;
import com.mssinfotech.dropjourney.volley.LruBitmapCache;
import android.app.Application;
import android.text.TextUtils;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.Volley;
public class AppController extends Application {
public static final String TAG = AppController.class.getSimpleName();
private RequestQueue mRequestQueue;
private ImageLoader mImageLoader;
LruBitmapCache mLruBitmapCache;
private static AppController mInstance;
@Override
public void onCreate() {
super.onCreate();
mInstance = this;
}
public static synchronized AppController getInstance() {
return mInstance;
}
public RequestQueue getRequestQueue() {
if (mRequestQueue == null) {
mRequestQueue = Volley.newRequestQueue(getApplicationContext());
}
return mRequestQueue;
}
public ImageLoader getImageLoader() {
getRequestQueue();
if (mImageLoader == null) {
getLruBitmapCache();
mImageLoader = new ImageLoader(this.mRequestQueue, mLruBitmapCache);
}
return this.mImageLoader;
}
public LruBitmapCache getLruBitmapCache() {
if (mLruBitmapCache == null)
mLruBitmapCache = new LruBitmapCache();
return this.mLruBitmapCache;
}
public <T> void addToRequestQueue(Request<T> req, String tag) {
req.setTag(TextUtils.isEmpty(tag) ? TAG : tag);
getRequestQueue().add(req);
}
public <T> void addToRequestQueue(Request<T> req) {
req.setTag(TAG);
getRequestQueue().add(req);
}
public void cancelPendingRequests(Object tag) {
if (mRequestQueue != null) {
mRequestQueue.cancelAll(tag);
}
}
}
UpcommingJourneyFeedItem.java
package com.mssinfotech.dropjourney.data;
public class UpcommingJourneyFeedItem {
private int id;
private String name, status, image, profilePic, timeStamp, url;
public UpcommingJourneyFeedItem() {
}
public UpcommingJourneyFeedItem(int id, String name, String image, String status,
String profilePic, String timeStamp, String url) {
super();
this.id = id;
this.name = name;
this.image = image;
this.status = status;
this.profilePic = profilePic;
this.timeStamp = timeStamp;
this.url = url;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getImge() {
return image;
}
public void setImge(String image) {
this.image = image;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getProfilePic() {
return profilePic;
}
public void setProfilePic(String profilePic) {
this.profilePic = profilePic;
}
public String getTimeStamp() {
return timeStamp;
}
public void setTimeStamp(String timeStamp) {
this.timeStamp = timeStamp;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
}
LruBitmapCache.java
package com.mssinfotech.dropjourney.volley;
import com.android.volley.toolbox.ImageLoader.ImageCache;
import android.graphics.Bitmap;
import android.support.v4.util.LruCache;
public class LruBitmapCache extends LruCache<String, Bitmap> implements
ImageCache {
public static int getDefaultLruCacheSize() {
final int maxMemory = (int) (Runtime.getRuntime().maxMemory()/1024);
final int cacheSize = maxMemory/8;
return cacheSize;
}
public LruBitmapCache() {
this(getDefaultLruCacheSize());
}
public LruBitmapCache(int sizeInKiloBytes) {
super(sizeInKiloBytes);
}
@Override
protected int sizeOf(String key, Bitmap value) {
return value.getRowBytes() * value.getHeight()/1024;
}
@Override
public Bitmap getBitmap(String url) {
return get(url);
}
@Override
public void putBitmap(String url, Bitmap bitmap) {
put(url, bitmap);
}
}
activity_upcoming_jour ney.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:descendantFocusability="blocksDescendants"
android:focusable="false"
android:focusableInTouchMode="false"
android:clickable="true"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
tools:context="com.mssinfotech.dropjourney.UpcomingJourney">
<android.support.design.widget.AppBarLayout
android:id="@+id/headBars"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/AppTheme.AppBarOverlay">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar_actionbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:popupTheme="@style/AppTheme.PopupOverlay" />
</android.support.design.widget.AppBarLayout>
<ListView
android:layout_below="@+id/headBars"
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:divider="@null" />
<LinearLayout
android:visibility="invisible"
android:id="@+id/errorImage"
android:background="#fff"
android:orientation="vertical"
android:textAlignment="center"
android:gravity="center"
android:layout_centerInParent="true"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:background="@drawable/ic_mood_bad_black_24dp"
android:layout_width="160dp"
android:layout_height="160dp" />
<TextView
android:textColor="#ccc"
android:textAlignment="center"
android:text="No Ride found"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:textSize="30dp"
android:textAlignment="center"
android:textColor="#f00"
android:text="No Record Found"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</RelativeLayout>
feed_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/feed_bg"
android:orientation="vertical" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginLeft="@dimen/feed_item_margin"
android:layout_marginRight="@dimen/feed_item_margin"
android:layout_marginTop="@dimen/feed_item_margin"
android:background="@drawable/bg_parent_rounded_corner"
android:orientation="vertical"
android:paddingBottom="@dimen/feed_item_padding_top_bottom"
android:paddingTop="@dimen/feed_item_padding_top_bottom" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:paddingLeft="@dimen/feed_item_padding_left_right"
android:paddingRight="@dimen/feed_item_padding_left_right" >
<com.android.volley.toolbox.NetworkImageView
android:id="@+id/profilePic"
android:layout_width="@dimen/feed_item_profile_pic"
android:layout_height="@dimen/feed_item_profile_pic"
android:scaleType="fitCenter" >
</com.android.volley.toolbox.NetworkImageView>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:paddingLeft="@dimen/feed_item_profile_info_padd" >
<TextView
android:id="@+id/name"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="@dimen/feed_item_profile_name"
android:textStyle="bold" />
<TextView
android:id="@+id/timestamp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="@color/timestamp"
android:textSize="@dimen/feed_item_timestamp" />
</LinearLayout>
</LinearLayout>
<TextView
android:id="@+id/txtStatusMsg"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:paddingBottom="5dp"
android:paddingLeft="@dimen/feed_item_status_pad_left_right"
android:paddingRight="@dimen/feed_item_status_pad_left_right"
android:paddingTop="@dimen/feed_item_status_pad_top" />
<TextView
android:id="@+id/txtUrl"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:linksClickable="true"
android:paddingBottom="10dp"
android:paddingLeft="@dimen/feed_item_status_pad_left_right"
android:paddingRight="@dimen/feed_item_status_pad_left_right"
android:textColorLink="@color/link" />
<com.mssinfotech.dropjourney.FeedImageView
android:id="@+id/feedImage1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white"
android:scaleType="fitXY"
android:visibility="visible" />
</LinearLayout>
</LinearLayout>
Ändern Sie listView.setOnItemSelectedListener zu listView.setOnItemClickListener und versuchen? – Raghavendra
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Können Sie Ihren aktualisierten Code posten? – Raghavendra