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POHow to load images using android baseadapter?
 

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  1. POHow to load images using android baseadapter?
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    <p>My project works without error, but upon loading, images are not loaded in the Listview. </p> <p>Here is a sample image</p> <p><a href="http://www.medyasef.com/baseadapteracildiginda.png" rel="nofollow">sample at the first working image</a></p> <p>But after dragging ListView, all images loads. </p> <p><a href="http://www.medyasef.com/birrowsona.jpg" rel="nofollow">sample draggened image load</a></p> <p>Please Help. Sorry bad english.</p> <p><strong>Categoryadapter.java</strong></p> <pre><code>package com.medyasef.dernek.tjod; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.http.AndroidHttpClient; import android.os.AsyncTask; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.HttpStatus; import org.apache.http.client.methods.HttpGet; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import java.util.ArrayList; import java.util.HashMap; import java.util.List; /** * Created by olkunmustafa on 26.09.2013. */ public class CategoryAdapter extends BaseAdapter { private String LOG_NAME = "HATA"; private List&lt;Categoryicerikler&gt; list_view; private HashMap&lt;Integer,Bitmap&gt; bitmaplist; private Context mContext; private Categories categories = new Categories(); public CategoryAdapter(List&lt;Categoryicerikler&gt; list_view, Context mContext) { this.list_view = list_view; this.mContext = mContext; bitmaplist = new HashMap&lt;Integer, Bitmap&gt;(); for (int i = 0; i &lt; list_view.size() ; i++) { Categoryicerikler bitmap_icerikler = list_view.get(i); setBitmapFromURL(bitmap_icerikler.getCategory_post_image(),i); } } /* Burada resimleri çekmek için thread oluşturuyoruz. Resim linkini ve ImageView'i veriyoruz ve ekrana basmasını sağlıyoruz. */ public void setBitmapFromURL(final String src,final int value) { new Thread( new Runnable() { @Override public void run() { HttpURLConnection connection= null; try { URL url = new URL(src); connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("GET"); connection.setDoInput(true); connection.setDoOutput(true); connection.connect(); InputStream input = connection.getInputStream(); final Bitmap myBitmap = BitmapFactory.decodeStream(input); try { bitmaplist.put(value,myBitmap); } catch (Exception e){ Log.d(LOG_NAME,e.getMessage()); Log.d(LOG_NAME,"Resim ekleme işlemi başarısız."); } } catch (IOException e) { e.printStackTrace(); } finally { connection.disconnect(); } } }).start(); } @Override public int getCount() { return list_view.size(); } @Override public Object getItem(int position) { return list_view.get(position); } @Override public long getItemId(int position) { return list_view.indexOf(getItem(position)); } @Override public View getView(int position, View convertview, ViewGroup viewGroup) { Categoryicerikler categoryicerikler = list_view.get(position); ViewHolder holder = null; if(convertview==null){ Log.d(LOG_NAME,"sonuc"); convertview = LayoutInflater.from(mContext).inflate(R.layout.categories,viewGroup,false); holder = new ViewHolder(); holder.txtTitle = (TextView) convertview.findViewById(R.id.category_posttitle); holder.txtDate = (TextView) convertview.findViewById(R.id.category_postdate); holder.imageView = (ImageView) convertview.findViewById(R.id.category_image); convertview.setTag(holder); Categories.categoryAdapter.notifyDataSetChanged(); } else { holder = (ViewHolder) convertview.getTag(); } holder.txtTitle.setText(categoryicerikler.getCategory_posttitle()); holder.txtDate.setText(categoryicerikler.getCategory_postdate()); try { holder.imageView.setImageBitmap(bitmaplist.get(position)); } catch (Exception e){ } return convertview; } /*private view holder class*/ private class ViewHolder { ImageView imageView; TextView txtTitle; TextView txtDate; } } </code></pre> <p><strong>Categoryicerikler.java</strong></p> <pre><code> package com.medyasef.dernek.tjod; import android.graphics.Bitmap; import android.widget.ImageView; /** * Created by olkunmustafa on 26.09.2013. */ public class Categoryicerikler { private String category_posttitle; private String category_postdate; private String category_post_content; private String category_post_image; public Categoryicerikler( String category_posttitle, String category_postdate, String category_post_content,String post_image) { this.category_posttitle = category_posttitle; this.category_postdate = category_postdate; this.category_post_content = category_post_content; this.category_post_image = post_image; } public String getCategory_posttitle() { return category_posttitle; } public void setCategory_posttitle(String category_posttitle) { this.category_posttitle = category_posttitle; } public String getCategory_postdate() { return category_postdate; } public void setCategory_postdate(String category_postdate) { this.category_postdate = category_postdate; } public String getCategory_post_content() { return category_post_content; } public void setCategory_post_content(String category_post_content) { this.category_post_content = category_post_content; } public String getCategory_post_image() { return category_post_image; } public void setCategory_post_image(String category_post_image) { this.category_post_image = category_post_image; } } </code></pre> <p><strong>Categories.java</strong></p> <pre><code>package com.medyasef.dernek.tjod; import android.app.Activity; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.AsyncTask; import android.os.Bundle; import android.os.SystemClock; import android.text.Html; import android.util.Log; import android.webkit.WebSettings; import android.webkit.WebView; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; import org.json.JSONException; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.util.HashMap; import java.util.List; /** * Created by olkunmustafa on 25.09.2013. */ public class Categories extends Activity { private List&lt;Categoryicerikler&gt; content_list; public static CategoryAdapter categoryAdapter; private ListView main_category; private static HashMap&lt;Integer,Bitmap&gt; bitmaplist; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_categories); main_category = (ListView) findViewById(R.id.main_category); new GetCategory().execute(); } private class GetCategory extends AsyncTask&lt;Void,Void,String&gt; { @Override protected void onPreExecute() { Toast.makeText(Categories.this, "İslem Baslıyor Bekleyiniz", Toast.LENGTH_SHORT).show(); } @Override protected String doInBackground(Void... voids) { /* Burada internete bağlanıp json veriyi string cinsinden çekiyoruz. */ InternetConnection internetcon = new InternetConnection(); String json_result = internetcon.get_json_data(); return json_result; } @Override protected void onPostExecute(String data) { /* Gelen string veriyi json_to_list_view metoduna veriyorum Bu metot gelen json verisinin içeriklerini doldurarak bana birt liste dönderir. */ try { content_list = GetJson.json_to_list_view(data); } catch (JSONException e) { Log.d("Json_Error","Json çekilirken hata oluştu"); } categoryAdapter = new CategoryAdapter(content_list,Categories.this); main_category.setAdapter(categoryAdapter); } } } </code></pre>
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    1. COwhy don`t you go with android AQUERY that is more efficient than lazy loading
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      1. USUsman Kurd
    2. COI am beginner android developer. I heard for the first time AQUERY. I'll try AQUERY library thanx
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    3. COhttp://code.google.com/p/android-query/ have a look at the following you will be saved from extra headache of Code
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