Программирование в вопросах и ответах
При нажатии на кнопку должен измениться размер layoutOne public void OnClick(View view) { RelativeLayout relativeLayout = findViewById(R.id.layoutOne); RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) relativeLayout.getLayoutParams(); params.height = 300; relativeLayout.setLayoutParams(params); } Но вылетает ошибкаE/AndroidRuntime: FATAL EXCEPTION: main Process: com.sfedu.schedule.sfedurasp, PID: 17448 java.lang.IllegalStateException: Could not execute method for android:onClick at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293) at android.view.View.performClick(View.java:5647) at android.view.View$PerformClick.run(View.java:22462) at android.os.Handler.handleCallback(Handler.java:754) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:163) at android.app.ActivityThread.main(ActivityThread.java:6221) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794) Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke(Native Method) at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) at android.view.View.performClick(View.java:5647) at android.view.View$PerformClick.run(View.java:22462) at android.os.Handler.handleCallback(Handler.java:754) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:163) at android.app.ActivityThread.main(ActivityThread.java:6221) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794) Caused by: java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams cannot be cast to android.widget.RelativeLayout$LayoutParams at com.sfedu.schedule.sfedurasp.Main.OnClick(Main.java:19) at java.lang.reflect.Method.invoke(Native Method) at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) at android.view.View.performClick(View.java:5647) at android.view.View$PerformClick.run(View.java:22462) at android.os.Handler.handleCallback(Handler.java:754) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:163) at android.app.ActivityThread.main(ActivityThread.java:6221) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794) Ответ В ошибке все написано:Caused by: java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams cannot be cast to android.widget.RelativeLayout$LayoutParams у вас RelativeLayout лежит в LinearLayout. Измените: RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) relativeLayout.getLayoutParams(); На: LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) relativeLayout.getLayoutParams();
В ошибке все написано:Caused by: java.lang.ClassCastException: android.widget.LinearLayout$LayoutParams cannot be cast to android.widget.RelativeLayout$LayoutParams у вас RelativeLayout лежит в LinearLayout. Измените: RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) relativeLayout.getLayoutParams(); На: LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) relativeLayout.getLayoutParams();
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