I want to build reusable widget. It should be ordinal composite of standard elements. What is the best approach. Below is the code sample which I use currently, however there might be something more elegant. Furthermore the sample below runs perfectly in runtime, but visual editor in Eclipse is throwing exceptions (which is not a problem for me at this time). Is there any recommended way of creating composites? Should I use fragment?

public class MyComposite extends LinearLayout {

  private ImageView m_a1;
  private ImageView m_a2;
  private ImageView m_w1;
  private ImageView m_w2;
  private ImageView m_w3;
  private ImageView m_w4;

  public CallBackSlider(final Context context) {
    this(context, null);
  }

  public CallBackSlider(final Context context, final AttributeSet attrs) {
    super(context, attrs);

    LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    inflater.inflate(R.layout.my_composite, this, true);
    setupViewItems();
  }

  private void setupViewItems() {
    m_a1 = (ImageView) findViewById(R.id.A1Img);
    m_w1 = (ImageView) findViewById(R.id.Wave1Img);
    m_w2 = (ImageView) findViewById(R.id.Wave2Img);
    m_w3 = (ImageView) findViewById(R.id.Wave3Img);
    m_w4 = (ImageView) findViewById(R.id.Wave4Img);
    m_a2 = (ImageView) findViewById(R.id.A2Img);
    resetView();
  }

  private void resetView() {
    m_w1.setAlpha(0);
    m_w2.setAlpha(0);
    m_w3.setAlpha(0);
    m_w4.setAlpha(0);
  }
}

Layout xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/MyComposite"
  ...  >

  <ImageView
    android:id="@+id/A1Img"
    android:src="@drawable/a1"
    ...
   />

  <ImageView
    android:id="@+id/Wave1Img"
    ...
    android:src="@drawable/wave1" />

  <ImageView
    android:id="@+id/Wave2Img"
    ...
    android:src="@drawable/wave2" />

  <ImageView
    android:id="@+id/Wave3Img"
    ...
    android:src="@drawable/wave3" />

  <ImageView
    android:id="@+id/Wave4Img"
    ...
    android:src="@drawable/wave4" />

<ImageView
    android:id="@+id/EarImg"
    ...
    android:src="@drawable/a2" />

</LinearLayout>

Then you can use it in other layouts like this:

...
<your.package.MyComposite 
    android:id="@+id/mc1"
    ...       
/>
...

And use from java code as well as instance of MyComposite class.