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PODownload images from remote URLs
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  1. PODownload images from remote URLs
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    copied!<p>Currently I am developing an Android app containing a list view which displays links for Youtube videos. The application gets its data from the server as JSON. Now I am trying to display thumbnails for these video from this subdomain - <code>http://img.youtube.com/vi/</code>.</p> <p>But the images don't show up in the list view.</p> <p>Here is the code for the project :</p> <p>1 - canticlesActivity.java</p> <pre><code>package com.shadatv.shada; import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.util.ArrayList; import java.util.HashMap; import org.apache.http.HttpEntity; import org.apache.http.HttpResponse; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.HttpClient; import org.apache.http.client.methods.HttpGet; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.util.EntityUtils; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.app.ListActivity; import android.os.AsyncTask; import android.os.Bundle; import android.os.Environment; import android.util.Log; import android.widget.ListAdapter; import android.widget.SimpleAdapter; import android.widget.TextView; import android.widget.Toast; public class canticlesActivity extends ListActivity { TextView httpStuff; HttpClient client; JSONArray canticles; String picpath = "http://img.youtube.com/vi/"; File sdcard = Environment.getExternalStorageDirectory(); File shadaRoot = new File(sdcard.getAbsolutePath() + "/shada_Folder"); private static final String CA_NAME = "ca_name"; private static final String CA_LINK = "ca_link"; private static final String CA_IMG = "ca_img"; private static final String URL = "http://dt-works.com/ags/shadatv/canticles/android_data"; ArrayList&lt;HashMap&lt;String, String&gt;&gt; canticlesList; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.canticles); httpStuff = (TextView) findViewById(R.id.textView1); client = new DefaultHttpClient(); new Read().execute(); } public JSONArray allCanticles() throws ClientProtocolException, IOException, JSONException { StringBuilder url = new StringBuilder(URL); HttpGet get = new HttpGet(url.toString()); HttpResponse r = client.execute(get); int status = r.getStatusLine().getStatusCode(); if (status == 200) { HttpEntity e = r.getEntity(); String data = EntityUtils.toString(e); JSONArray canticles = new JSONArray(data); return canticles; } else { Toast.makeText(getBaseContext(), "error", Toast.LENGTH_SHORT).show(); return null; } } public void downloadImage(String fileURL) { try { // Toast.makeText(getBaseContext(), "baaad", Toast.LENGTH_SHORT).show(); String finlpth = ""; finlpth = picpath + fileURL + "/2.jpg"; shadaRoot.mkdirs(); URL u = new URL(finlpth); HttpURLConnection c = (HttpURLConnection) u.openConnection(); c.setRequestMethod("GET"); c.setDoOutput(true); c.connect(); File DownloadedFile = new File(shadaRoot, fileURL + ".jpg"); // if(!outfile.exists()) FileOutputStream f = new FileOutputStream(DownloadedFile); InputStream in = c.getInputStream(); byte[] buffer = new byte[1024]; int len1 = 0; while ((len1 = in.read(buffer)) &gt; 0) { f.write(buffer, 0, len1); } f.close(); } catch (Exception e) { Log.d("Downloader", e.getMessage()); } } public class Read extends AsyncTask&lt;String, String, String&gt;{ @Override protected String doInBackground(String... params) { canticlesList = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;(); try { canticles = allCanticles(); for (int i = 0; i &lt; canticles.length(); i++) { JSONObject canticle = canticles.getJSONObject(i); String ca_name = canticle.getString(CA_NAME); String ca_link = canticle.getString(CA_LINK); downloadImage(ca_link); HashMap&lt;String, String&gt; map = new HashMap&lt;String, String&gt;(); map.put(CA_NAME, ca_name); map.put(CA_LINK, ca_link); map.put(CA_IMG, ca_link + ".jpg"); canticlesList.add(map); } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (JSONException e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(String result) { ListAdapter adapter = new SimpleAdapter(canticlesActivity.this, canticlesList,R.layout.list_item, new String[] {CA_NAME, CA_LINK, CA_IMG}, new int[] {R.id.ca_name, R.id.ca_link, R.id.ca_img}); setListAdapter(adapter); } } } </code></pre> <p>2 - list_item.xml</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@drawable/list_selector" android:orientation="horizontal" &gt; &lt;!-- Product id (pid) - will be HIDDEN - used to pass to other activity --&gt; &lt;ImageView android:id="@+id/ca_img" android:layout_width="50dip" android:layout_height="50dip" android:contentDescription="@string/desc" /&gt; &lt;TextView android:id="@+id/ca_name" android:layout_width="fill_parent" android:layout_height="wrap_content" /&gt; &lt;!-- Name Label --&gt; &lt;TextView android:id="@+id/ca_link" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingTop="6dip" android:paddingLeft="6dip" android:textSize="17sp" android:textStyle="bold" android:visibility="gone" /&gt; &lt;/LinearLayout&gt; </code></pre>
 

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