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POHow does ListView in Android works ? I'm confused
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  1. POHow does ListView in Android works ? I'm confused
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    copied!<p>I was trying a simple list view in android. I got an example from some website. It worked. Code below:</p> <p>Main Layout File: (res/layout/main.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:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"&gt; &lt;ListView android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/mainListView"&gt; &lt;/ListView&gt; &lt;/LinearLayout&gt; </code></pre> <p>Row File: (res/layout/simplerow.xml)</p> <pre><code>&lt;TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/rowTextView" android:layout_width="fill_parent" android:layout_height="wrap_content" android:padding="10dp" android:textSize="16sp" &gt; &lt;/TextView&gt; </code></pre> <p>Main Activity:</p> <pre><code>package com.windrealm.android; import java.util.ArrayList; import java.util.Arrays; import android.app.Activity; import android.os.Bundle; import android.widget.ArrayAdapter; import android.widget.ListView; public class SimpleListViewActivity extends Activity { private ListView mainListView ; private ArrayAdapter&lt;String&gt; listAdapter ; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // Find the ListView resource. mainListView = (ListView) findViewById( R.id.mainListView ); // Create and populate a List of planet names. String[] planets = new String[] { "Mercury", "Venus", "Earth", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune"}; ArrayList&lt;String&gt; planetList = new ArrayList&lt;String&gt;(); planetList.addAll( Arrays.asList(planets) ); // Create ArrayAdapter using the planet list. listAdapter = new ArrayAdapter&lt;String&gt;(this, R.layout.simplerow, planetList); // Add more planets. If you passed a String[] instead of a List&lt;String&gt; // into the ArrayAdapter constructor, you must not add more items. // Otherwise an exception will occur. listAdapter.add( "Ceres" ); listAdapter.add( "Pluto" ); listAdapter.add( "Haumea" ); listAdapter.add( "Makemake" ); listAdapter.add( "Eris" ); // Set the ArrayAdapter as the ListView's adapter. mainListView.setAdapter( listAdapter ); } } </code></pre> <p>I was trying to add an image, not even dynamic. I just thought of adding a layout into the <code>simplerow.xml</code> file. But its not working.</p> <p>Code below:</p> <pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" &gt; &lt;ImageView android:id="@+id/imageView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:contentDescription="@string/songs" android:src="@drawable/song_bg" /&gt; &lt;ImageView android:id="@+id/albumArt" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:layout_marginLeft="5dp" android:contentDescription="@string/album" android:src="@drawable/albumart_shanghai" /&gt; &lt;TextView android:id="@+id/rowTextView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/albumArt" android:layout_toRightOf="@+id/albumArt" android:layout_marginLeft="10dp" android:textAppearance="?android:attr/textAppearanceMedium" android:textColor="@android:color/black" /&gt; &lt;ImageButton android:id="@+id/imageView3" android:layout_width="48dp" android:layout_height="48dp" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:background="@null" android:contentDescription="@string/arrow" android:src="@drawable/arrow_icon" /&gt; &lt;/RelativeLayout&gt; </code></pre> <p>We can't add the Relative layout inside the ListView ? Pls help me I'm struck with ListView from one month. I couldn't even move a single step :( I'm newbie to java and XML. Pls someone show me the right path.</p>
 

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