title: unable to change webview height programmatically
body: <p>I set a webview on my main layout and I am unable to resize it programmatically. Webview is in the "main" layout.
  If do the same with his contentainer "layoutA", works but not a solution, I need to set only webview view. Thank you.</p>
  
  <pre><code>protected void onCreate(Bundle savedInstanceState){
              super.onCreate(savedInstanceState);
              setContentView(R.layout.main);
  
              final RelativeLayout LayoutA = (RelativeLayout)findViewById(R.id.aLayout);
              webviewA = (WebView) findViewById(R.id.webviewA);           
  
              Handler handler = new Handler();
              final Runnable r = new Runnable()
              {
                  public void run() 
                  {
                       LayoutParams params = (LayoutParams) webviewA.getLayoutParams();
  
                        params.height -= 150;
  
                  }
              };
  
              handler.postDelayed(r, 1000);
  </code></pre>
  
  <p>logcat,</p>
  
  <pre><code>07-06 11:23:21.204: E/AndroidRuntime(13795): FATAL EXCEPTION: main
  07-06 11:23:21.204: E/AndroidRuntime(13795): java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams
  07-06 11:23:21.204: E/AndroidRuntime(13795):    at com.xxxx.projecte1.webPush$1.run(webPush.java:109)
  07-06 11:23:21.204: E/AndroidRuntime(13795):    at android.os.Handler.handleCallback(Handler.java:587)
  07-06 11:23:21.204: E/AndroidRuntime(13795):    at android.os.Handler.dispatchMessage(Handler.java:92)
  07-06 11:23:21.204: E/AndroidRuntime(13795):    at android.os.Looper.loop(Looper.java:138)
  07-06 11:23:21.204: E/AndroidRuntime(13795):    at android.app.ActivityThread.main(ActivityThread.java:3701)
  07-06 11:23:21.204: E/AndroidRuntime(13795):    at java.lang.reflect.Method.invokeNative(Native Method)
  07-06 11:23:21.204: E/AndroidRuntime(13795):    at java.lang.reflect.Method.invoke(Method.java:507)
  07-06 11:23:21.204: E/AndroidRuntime(13795):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878)
  07-06 11:23:21.204: E/AndroidRuntime(13795):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:636)
  07-06 11:23:21.204: E/AndroidRuntime(13795):    at dalvik.system.NativeStart.main(Native Method)
  </code></pre>