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  1. POAndroid ListView Search
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    copied!<p>I am updating list view with json data from localhost, it works well shows all the data comes from server. Now i am trying to add a search method in this activity. Tried some code but it gives an error don't know how to handle it. Please help me applying the search method.</p> <pre><code>/* Background Async Task to Load all person data by making HTTP Request */ class LoadPersonData extends AsyncTask&lt;String, String, String&gt; { protected String doInBackground(String... args) { List&lt;NameValuePair&gt; params = new ArrayList&lt;NameValuePair&gt;(); // getting JSON string from URL JSONObject json = jParser.makeHttpRequest(url, "GET", params); try { // Checking for SUCCESS TAG int success = json.getInt(TAG_SUCCESS); if (success == 1) { person = json.getJSONArray(TAG_PRODUCTS); for (int i = 0; i &lt; person.length(); i++) { JSONObject c = person.getJSONObject(i); // Storing each one in variable String mp_id = c.getString(TAG_PID); String mp_name = c.getString(TAG_NAME); String mp_gender = c.getString(TAG_GENDER); String mp_age = c.getString(TAG_REPAGE); String repoter_name = c.getString(TAG_REPNAME); String repoter_contact = c.getString(TAG_REPPHONE); // creating 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, mp_id); map.put(TAG_NAME, "Name: "+ mp_name); map.put(TAG_GENDER, "Gender: "+ mp_gender); map.put(TAG_REPAGE, "Age: "+ mp_age); map.put(TAG_REPNAME, "Report Person: "+ repoter_name); map.put(TAG_REPPHONE, "Reprt Person#: "+ repoter_contact); // adding HashList to ArrayList personList.add(map); } } else { // no person from json // Launch Add New product Activity Intent i = new Intent(getApplicationContext(), AddNewPerson.class); // Closing all previous activities i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); startActivity(i); } } catch (JSONException e) { e.printStackTrace(); } return null } protected void onPostExecute(String file_url) { // updating UI from Background Thread runOnUiThread(new Runnable() { public void run() { /** * Updating parsed JSON data into ListView * */ ListAdapter adapter = new SimpleAdapter( AllFoundPerson.this, productsList, R.layout.list_item_found, new String[] { TAG_PID, TAG_NAME, TAG_GENDER, TAG_REPAGE, TAG_REPNAME, TAG_REPPHONE}, new int[] { R.id.fpid, R.id.namefound, R.id.genderfound,R.id.agefound, R.id.repoter_found, R.id.repoterphone_found }); setListAdapter(adapter); </code></pre> <p>// MY CODE IS WORKING WELL TILL HERE BUT WHEN I ADDED THE BELOW METHOD THE APP JUST CRASHED</p> <pre><code>// Applying Search method inputSearch.addTextChangedListener(new TextWatcher() { @Override public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) { // When user changed the Text AllFoundPerson.this.adapter.getFilter().filter(cs); // Error in adapter, adator is not a field } @Override public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) { // TODO Auto-generated method stub } @Override public void afterTextChanged(Editable arg0) { // TODO Auto-generated method stub } }); } }); } } } </code></pre> <p>Here is error in this field <code>AllFoundPerson.this.adapter.getFilter().filter(cs);</code>adaptor cannot be resolved or not field</p> <p>list_item_found.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="match_parent" android:orientation="vertical" &gt; &lt;TextView android:id="@+id/fpid" android:layout_width="fill_parent" android:layout_height="wrap_content" android:visibility="gone"/&gt; &lt;TextView android:id="@+id/namefound" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingTop="6dip" android:paddingLeft="6dp" android:textSize="17sp" android:textColor="#FF00FF" android:textStyle="bold" /&gt; &lt;TextView android:id="@+id/genderfound" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingTop="6dp" android:paddingLeft="6dp" android:textSize="17sp" android:textStyle="bold" /&gt; &lt;TextView android:id="@+id/agefound" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingTop="6dip" android:paddingLeft="6dp" android:textSize="17sp" android:textStyle="bold" /&gt; &lt;TextView android:id="@+id/repoter_found" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingTop="6dp" android:paddingLeft="6dp" android:textSize="17sp" android:textStyle="bold" /&gt; &lt;TextView android:id="@+id/repoterphone_found" android:layout_width="fill_parent" android:layout_height="wrap_content" android:paddingTop="6dp" android:paddingLeft="6dp" android:textSize="17sp" android:textStyle="bold" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>all_found_person.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="fill_parent" android:orientation="vertical" &gt; &lt;!-- Editext for Search --&gt; &lt;EditText android:id="@+id/inputSearch" android:layout_width="fill_parent" android:layout_height="wrap_content" android:hint="Enter a name to Search.." android:inputType="textVisiblePassword"/&gt; &lt;!-- List View --&gt; &lt;ListView android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="wrap_content"/&gt; &lt;/LinearLayout&gt; </code></pre> <p><strong>Edited:</strong></p> <p>After i added the adapter as a class member <code>ArrayAdapter&lt;String&gt; adapter;</code>the error has gone but when i run the app i see the list but when enter any key in the search box the app just gone crashed here is my logcat details.</p> <p><img src="https://i.stack.imgur.com/n5uZ3.png" alt="enter image description here"></p> <pre><code>10-06 13:47:30.880: D/AndroidRuntime(4069): Shutting down VM 10-06 13:47:30.880: W/dalvikvm(4069): threadid=1: thread exiting with uncaught exception (group=0xb3fcd4f0) 10-06 13:47:30.880: D/AndroidRuntime(4069): procName from cmdline: com.DRMS.disas_recovery 10-06 13:47:30.880: E/AndroidRuntime(4069): in writeCrashedAppName, pkgName :com.DRMS.disas_recovery 10-06 13:47:30.880: D/AndroidRuntime(4069): file written successfully with content: com.DRMS.disas_recovery StringBuffer : ;com.DRMS.disas_recovery </code></pre>
 

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