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POAndroid: using LayoutInflater.inflate to pass custom parameters to a constructor
 

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    <p>This has been bothering me for a while, and none of my searching has yielded results. If I have a custom GUI element, I can use a LayoutInflater to inflate it as I would a normal component. The inflation call results in a call to my custom GUI element's constructor, and all is well. </p> <p>However, what if I want to add a custom parameter to my element's constructor? Is there a way I can pass this parameter in using LayoutInflater?</p> <p>For example: </p> <p>In main xml, I have a holder for my layout:</p> <pre><code>&lt;LinearLayout android:id="@+id/myFrameLayoutHolder" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" &gt; &lt;/LinearLayout&gt; </code></pre> <p>and a MyFrameLayout.xml file:</p> <pre><code> &lt;com.example.MyFrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/MyFLayout" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1 &gt; &lt;!-- Cool custom stuff --&gt; &lt;/com.example.MyFrameLayout&gt; </code></pre> <p>and an inflater call:</p> <pre><code>LayoutInflater MyInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); LinearLayout myFLayoutHolder = (LinearLayout) findViewById(R.id.myFrameLayoutHolder); MyFrameLayout L = ((MyFrameLayout) MyInflater.inflate(R.layout.MyFLayout, myFLayoutHolder, false)); myFLayoutHolder.addView(L); </code></pre> <p>If, in my class that extends FrameLayout, I add a parameter to my constructor, I get a crash:</p> <pre><code>public class MyFrameLayout extends FrameLayout { private int myInt; public MyFrameLayout(Context context) { this(context, null); } public MyFrameLayout(Context context, AttributeSet attrs) { this(context, attrs, 0, 0); } public MyFrameLayout(Context context, AttributeSet attrs, int defStyle, int myParameter) { super(context, attrs, defStyle); myInt = myParameter; //Amazing feats of initialization } } </code></pre> <p>Now, it's easy enough to work around this issue by defining a custom init method that I call right after layout inflation, but that seems clumsy to me. Is there a better way?</p>
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