滚动视图中的异常 [英] Exception in Scrollview

问题描述

在我的 android 应用程序中，我遇到了 IllegalStateException.我以后无法重现此异常.这是堆栈跟踪

In my android application, I'm facing a IllegalStateException. I can't reproduce this exception later. This is the stacktrace

Non-fatal Exception: java.lang.IllegalStateException: ScrollView can host only one direct child
       at android.widget.ScrollView.addView(ScrollView.java:397)
       at android.support.design.widget.BaseTransientBottomBar.showView(BaseTransientBottomBar.java:436)
       at android.support.design.widget.BaseTransientBottomBar$1.handleMessage(BaseTransientBottomBar.java:178)
       at android.os.Handler.dispatchMessage(Handler.java:98)
       at android.os.Looper.loop(Looper.java:146)
       at android.app.ActivityThread.main(ActivityThread.java:5679)
       at java.lang.reflect.Method.invokeNative(Method.java)
       at java.lang.reflect.Method.invoke(Method.java:515)
       at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1291)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107)
       at dalvik.system.NativeStart.main(NativeStart.java)  

请大家帮帮我！

推荐答案

我遇到了同样的问题.我已经使用以下步骤进行了复制.

第 1 步:使用 Scrollview 的父级为您创建 Fragment 或 Activity 布局.

Step 1: make you Fragment Or Activity Layout with a parent of Scrollview.

第 2 步:像 belove 一样在 onPause()、onStop()、onDestroy() 中显示 Snackbar.

Step 2: show Snackbar in onPause(), onStop(), onDestroy() like belove.

@Override
    public void onPause() {
        super.onPause();
        Snackbar.make(button, "onPause", Snackbar.LENGTH_LONG).show();
    }

    @Override
    public void onStop() {
        super.onPause();
        Snackbar.make(button, "onStop", Snackbar.LENGTH_LONG).show();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();

        Snackbar.make(button, "onDestroy", Snackbar.LENGTH_LONG).show();
    }

现在运行一个应用程序并检查 logcat.当你点击返回按钮时你会得到同样的错误提到的问题.

Now run an app and check in logcat. when you click on back button you will get same error mention in question.

解决方案:

制作一个普通的 Snackbar，如下所示.

@Override
        public void onPause() {
            super.onPause();
            showSnackbar("onPause");
        }

        @Override
        public void onStop() {
            super.onPause();
            showSnackbar("onStop");
        }

        @Override
        public void onDestroy() {
            super.onDestroy();
            showSnackbar("onDestroy");
        }

    private void showSnackbar(String message) {
            if (isValidContext(getActivity())) {
                Snackbar.make(btnConsume, message, Snackbar.LENGTH_LONG).show();
            } 
        }

    public static boolean isValidContext(final Context context) {

            if (context == null) {
                return false;
            }
            if (context instanceof Activity) {
                final Activity activity = (Activity) context;
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
                    return !activity.isDestroyed() && !activity.isFinishing();
                } else {
                    return !activity.isFinishing();
                }
            }
            return true;

        }

这篇关于滚动视图中的异常的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！