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POManipulate ListView from MySQL database
 

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    <p>I'm following <a href="http://www.androidhive.info/2012/05/how-to-connect-android-with-php-mysql/" rel="nofollow">this tutorial</a> and trying to manipulate <code>ListView</code> from <code>MySQL</code> database but my app crashes and LogCat says:</p> <pre><code>11-28 11:06:42.093: E/AndroidRuntime(874): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.wintel.vasonapps/com.wintel.vasonapps.AllRBT}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list' </code></pre> <p>Though I have a ListView named <code>list</code>. Here is the layout:</p> <pre><code>&lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" &gt; &lt;ListView android:id="@android:id/list" android:layout_width="match_parent" android:layout_height="wrap_content" &gt; &lt;/ListView&gt; &lt;/LinearLayout&gt; </code></pre> <p>I have a xml file for each item, named <code>list_item.xml</code> </p> <pre><code> &lt;!-- Product id (pid) - will be HIDDEN - used to pass to other activity --&gt; &lt;TextView android:id="@+id/pid" android:layout_width="fill_parent" android:layout_height="wrap_content" android:visibility="gone" /&gt; &lt;!-- Name Label --&gt; &lt;TextView android:id="@+id/name" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingTop="6dip" android:paddingLeft="6dip" android:textSize="17dip" android:textStyle="bold" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>Can anybody say why my app crashes? If further code is needed please tell me I'll edit this question with that code. Thanks in advance.</p> <p><strong>Edit:</strong> This is <code>AllRBT.java</code>, after setting ID an error comes from here line 57</p> <pre><code>package com.wintel.vasonapps; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import org.apache.http.NameValuePair; import org.json.JSONArray; import org.json.JSONException; import org.json.JSONObject; import android.app.ListActivity; import android.app.ProgressDialog; import android.content.Intent; import android.os.AsyncTask; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListAdapter; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.TextView; public class AllRBT extends ListActivity { // Progress Dialog private ProgressDialog pDialog; // Creating JSON Parser object JSONParser jParser = new JSONParser(); ArrayList&lt;HashMap&lt;String, String&gt;&gt; productsList; // url to get all products list private static String url_all_products = "http://127.0.0.1/test/apps.php"; // JSON Node names private static final String TAG_SUCCESS = "success"; private static final String TAG_PRODUCTS = "products"; private static final String TAG_PID = "pid"; private static final String TAG_NAME = "name"; // products JSONArray JSONArray products = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_all_rbt); // Hashmap for ListView productsList = new ArrayList&lt;HashMap&lt;String, String&gt;&gt;(); // Loading products in Background Thread new LoadAllProducts().execute(); //Line 57, this line throws error // Get listview ListView lv = getListView(); // on seleting single product // launching Edit Product Screen lv.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) { // getting values from selected ListItem String pid = ((TextView) view.findViewById(R.id.pid)).getText() .toString(); // Starting new intent //Intent in = new Intent(getApplicationContext(), // EditProductActivity.class); // sending pid to next activity //in.putExtra(TAG_PID, pid); // starting new activity and expecting some response back //startActivityForResult(in, 100); } }); } // Response from Edit Product Activity @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); // if result code 100 if (resultCode == 100) { // if result code 100 is received // means user edited/deleted product // reload this screen again Intent intent = getIntent(); finish(); startActivity(intent); } } /** * Background Async Task to Load all product by making HTTP Request * */ class LoadAllProducts extends AsyncTask&lt;String, String, String&gt; { /** * Before starting background thread Show Progress Dialog * */ @Override protected void onPreExecute() { super.onPreExecute(); pDialog = new ProgressDialog(AllRBT.this); pDialog.setMessage("Loading ring back tones. Please wait..."); pDialog.setIndeterminate(false); pDialog.setCancelable(false); pDialog.show(); } /** * getting All products from url * */ protected String doInBackground(String... args) { // Building Parameters List&lt;NameValuePair&gt; params = new ArrayList&lt;NameValuePair&gt;(); // getting JSON string from URL JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params); // Check your log cat for JSON reponse Log.d("All Products: ", json.toString()); try { // Checking for SUCCESS TAG int success = json.getInt(TAG_SUCCESS); if (success == 1) { // products found // Getting Array of Products products = json.getJSONArray(TAG_PRODUCTS); // looping through All Products for (int i = 0; i &lt; products.length(); i++) { JSONObject c = products.getJSONObject(i); // Storing each json item in variable String id = c.getString(TAG_PID); String name = c.getString(TAG_NAME); // creating new HashMap HashMap&lt;String, String&gt; map = new HashMap&lt;String, String&gt;(); // adding each child node to HashMap key =&gt; value map.put(TAG_PID, id); map.put(TAG_NAME, name); // adding HashList to ArrayList productsList.add(map); } } else { // no products found // Launch Add New product Activity //Intent i = new Intent(getApplicationContext(), // NewProductActivity.class); // Closing all previous activities //i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); //startActivity(i); } } catch (JSONException e) { e.printStackTrace(); } return null; } /** * After completing background task Dismiss the progress dialog * **/ protected void onPostExecute(String file_url) { // dismiss the dialog after getting all products pDialog.dismiss(); // updating UI from Background Thread runOnUiThread(new Runnable() { public void run() { /** * Updating parsed JSON data into ListView * */ ListAdapter adapter = new SimpleAdapter( AllRBT.this, productsList, R.layout.list_item, new String[] { TAG_PID, TAG_NAME}, new int[] { R.id.pid, R.id.name }); // updating listview setListAdapter(adapter); } }); } } } </code></pre> <p>And the error is:</p> <pre><code>11-28 11:39:54.212: E/WindowManager(1596): Activity com.wintel.vasonapps.AllRBT has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{40cd2c88 V.E..... R......D 0,0-480,144} that was originally added here 11-28 11:39:54.212: E/WindowManager(1596): android.view.WindowLeaked: Activity com.wintel.vasonapps.AllRBT has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{40cd2c88 V.E..... R......D 0,0-480,144} that was originally added here 11-28 11:39:54.212: E/WindowManager(1596): at android.view.ViewRootImpl.&lt;init&gt;(ViewRootImpl.java:354) 11-28 11:39:54.212: E/WindowManager(1596): at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:216) 11-28 11:39:54.212: E/WindowManager(1596): at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69) 11-28 11:39:54.212: E/WindowManager(1596): at android.app.Dialog.show(Dialog.java:281) 11-28 11:39:54.212: E/WindowManager(1596): at com.wintel.vasonapps.AllRBT$LoadAllProducts.onPreExecute(AllRBT.java:117) 11-28 11:39:54.212: E/WindowManager(1596): at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:586) 11-28 11:39:54.212: E/WindowManager(1596): at android.os.AsyncTask.execute(AsyncTask.java:534) 11-28 11:39:54.212: E/WindowManager(1596): at com.wintel.vasonapps.AllRBT.onCreate(AllRBT.java:57) </code></pre>
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