LinearLayout $ LayoutParams no se puede convertir en android.widget.FrameLayout $ LayoutParams

Explicación y solución en la parte inferior.

Estoy desarrollando una animación de la disposición del resbalador, trabajo de la animación muy bien pero cuando todo el extremo del proceso consiga la excepción siguiente.

Supongo que RelativeLayout tiene algo que hacer en la excepción, pero no sé resuelto.

 09-06 11:24:58.952: E/Trace(30884): error opening trace file: No such file or directory (2) 09-06 11:25:09.113: E/AndroidRuntime(30884): FATAL EXCEPTION: main 09-06 11:25:09.113: E/AndroidRuntime(30884): java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams cannot be cast to android.widget.FrameLayout$LayoutParams 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.widget.FrameLayout.onMeasure(FrameLayout.java:311) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.View.measure(View.java:15264) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4916) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.View.measure(View.java:15264) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4916) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1390) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.widget.LinearLayout.measureVertical(LinearLayout.java:681) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.widget.LinearLayout.onMeasure(LinearLayout.java:574) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.View.measure(View.java:15264) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:4916) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310) 09-06 11:25:09.113: E/AndroidRuntime(30884): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2161) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.View.measure(View.java:15264) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2129) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1240) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1433) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1125) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4607) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:747) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.Choreographer.doCallbacks(Choreographer.java:567) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.Choreographer.doFrame(Choreographer.java:536) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:733) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.os.Handler.handleCallback(Handler.java:615) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.os.Handler.dispatchMessage(Handler.java:92) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.os.Looper.loop(Looper.java:153) 09-06 11:25:09.113: E/AndroidRuntime(30884): at android.app.ActivityThread.main(ActivityThread.java:5086) 09-06 11:25:09.113: E/AndroidRuntime(30884): at java.lang.reflect.Method.invokeNative(Native Method) 09-06 11:25:09.113: E/AndroidRuntime(30884): at java.lang.reflect.Method.invoke(Method.java:511) 09-06 11:25:09.113: E/AndroidRuntime(30884): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:821) 09-06 11:25:09.113: E/AndroidRuntime(30884): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:584) 09-06 11:25:09.113: E/AndroidRuntime(30884): at dalvik.system.NativeStart.main(Native Method) 

Activity_home.xml

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <LinearLayout android:id="@+id/leftView" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#cad000" android:orientation="vertical" > </LinearLayout> <LinearLayout android:id="@+id/mainView" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#876000" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="50dp" android:background="#cecece" android:orientation="horizontal" > <Button android:id="@+id/btnSlide" style="@style/btn1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="X" /> </LinearLayout> </LinearLayout> </RelativeLayout> 

Actividad

 public class HomeActivity extends Activity implements OnClickListener { UserStorage userStorage = new UserStorage(); private Button btnSlide; private LinearLayout mainView, leftView; private SliderAnimation slideAnimation; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_home); this.leftView = (LinearLayout) findViewById(R.id.leftView); this.mainView = (LinearLayout) findViewById(R.id.mainView); this.btnSlide = (Button) findViewById(R.id.btnSlide); this.btnSlide.setOnClickListener(this); this.slideAnimation = new SliderAnimation(this); this.slideAnimation.initializeFilterAnimations(this.mainView, this.leftView); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.btnSlide: this.slideAnimation.toggleLeftSliding(); break; } } } 

AnimationListener

 public class SliderAnimation implements AnimationListener { private Context context; private LinearLayout mainView, leftView; private Animation mainSlideIn, mainSlideOut; private boolean leftAnimated, rightAnimated = false; private int deviceWidth; public SliderAnimation(Context context) { this.context = context; DisplayMetrics displayMetrics = context.getResources() .getDisplayMetrics(); this.deviceWidth = displayMetrics.widthPixels; } public void initializeFilterAnimations(LinearLayout mainView, LinearLayout leftView) { this.mainView = mainView; this.leftView = leftView; this.mainSlideIn = AnimationUtils.loadAnimation(context, R.anim.main_slide_in); this.mainSlideIn.setAnimationListener(this); this.mainSlideOut = AnimationUtils.loadAnimation(context, R.anim.main_slide_out); this.mainSlideOut.setAnimationListener(this); } public void toggleLeftSliding() { if (!this.leftAnimated) { this.mainView.startAnimation(this.mainSlideIn); } else { this.mainView.startAnimation(this.mainSlideOut); } } @Override public void onAnimationEnd(Animation animation) { if (!this.leftAnimated) { LinearLayout.LayoutParams params = new LinearLayout.LayoutParams( (this.deviceWidth * 20) / 100, this.mainView.getHeight()); params.leftMargin = (this.deviceWidth * 80) / 100; this.mainView.setLayoutParams(params); this.leftAnimated = true; } else { LinearLayout.LayoutParams params = new LinearLayout.LayoutParams( this.deviceWidth, this.mainView.getHeight()); params.leftMargin = 0; this.mainView.setLayoutParams(params); this.leftAnimated = false; } } @Override public void onAnimationRepeat(Animation animation) { } @Override public void onAnimationStart(Animation animation) { } } 

Gracias de antemano.

EXPLICACIÓN Y SOLUCIÓN

Hemos conocido el contenedor ViewGroup padre para la vista, ya que las vistas se rellenan con su LayoutParams principal para propósitos de medición.

Si no sabemos a través de una simple mirada en el xml que es el ViewGroup padre para la vista, podemos obtener siempre su referencia con el método .getParent () de la instancia de vista.

 LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(this.mainview.getWidth(), this.mainview.getHeight()); params.setMargins(left, top, right, bottom); this.mainview.setLayoutParams(params); 

 <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".newsblog.NewsDetailsActivity" > <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content"/> </RelativeLayout> //IN ACTIVITY RelativeLayout.LayoutParams params=new RelativeLayout.LayoutParams(30,30); //Parent Params linearLayout.setLayoutParmas(params); //Child Layout //If you want to set the params of the Relative Layout. It seems it doesn't have any parent but it has a parent created by android framework which is a frame layout. So FrameLayout.LayoutParmas params=new FrameLayout.LayoutParmas(30, 30);//FrameLayout is a parentcreated by anroid frame work relativeLayout.setLayoutParmas(params); ////Here Relative layout is child 

 int width = mainview.getWidth(); int height = mainview.getHeight(); LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(width, height); params.setMargins(left, top, right, bottom); mainview.setLayoutParams(params); 

 FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) parentLayout.getLayoutParams(); int leftMargin = (int) getResources().getDimension(R.dimen.exclusion_card_margin_left_right); int rightMargin = (int) getResources().getDimension(R.dimen.exclusion_card_margin_left_right); params.setMargins(leftMargin, 0, rightMargin, 0); parentLayout.setLayoutParams(params);