Question

由于某些原因，当我将“可见性”设置为java.lang.RuntimeException: Could not find RESUMED activity on main thread at com.snapchat.android.crema.Screenshotter.screenshotCurrentActivity(Screenshotter.java:49) at com.snapchat.android.crema.Screenshotter$1.run(Screenshotter.java:33) at android.app.Instrumentation$SyncRunnable.run(Instrumentation.java:2092) at android.os.Handler.handleCallback(Handler.java:789) at android.os.Handler.dispatchMessage(Handler.java:98) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6541) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) INSTRUMENTATION_RESULT: shortMsg=Process crashed. INSTRUMENTATION_CODE: 0时，我的某些视图元素无法隐藏，当我将其设置为Gone时，其他人不会显示。

在此示例中，cmdCallMe不会隐藏，cmdOk和cmdCancel也不会出现。其他元素都按预期运行。

（来源略有缩短）

活动代码：

Visible

AXML：

    protected override void OnCreate(Bundle bundle)
    {
        base.OnCreate(bundle);

        SetContentView(Resource.Layout.p2);
        titleStatusView = FindViewById<TextView>(Resource.Id.lblP2Status);
        outputTextView = FindViewById<TextView>(Resource.Id.lblP2Timer);
        lblConfirm = FindViewById<TextView>(Resource.Id.lblP2Confirm);
        cmdP2Update = FindViewById<Button>(Resource.Id.cmdP2Update);
        cmdP2Arrived = FindViewById<Button>(Resource.Id.cmdP2Arrived);
        cmdP2SelfDeployed = FindViewById<Button>(Resource.Id.cmdP2SelfDeployed);
        cmdP2CallMe = FindViewById<Button>(Resource.Id.cmdP2CallMe);

        cmdOk = FindViewById<Button>(Resource.Id.cmdP2CallMe);
        cmdCancel = FindViewById<Button>(Resource.Id.cmdP2CallMe);

        // hide normal buttons
        // these all hide as expected
        cmdP2Update.Visibility = ViewStates.Gone;
        cmdP2Arrived.Visibility = ViewStates.Gone;
        cmdP2SelfDeployed.Visibility = ViewStates.Gone;
        // this should hide cmdCallMe but it doesn't change
        cmdP2CallMe.Visibility = ViewStates.Gone;
        // show confirm elements
        // this appears as expected
        lblConfirm.Visibility = ViewStates.Visible;
        // the following 2 buttons should appear, but don't
        cmdOk.Visibility = ViewStates.Visible;
        cmdCancel.Visibility = ViewStates.Visible;

当我单步执行时，所有值都按照我的预期分配。我无法解释为什么元素可见性并不能始终反映这一点。

Answer 1

看看你的代码：

cmdP2CallMe = FindViewById<Button>(Resource.Id.cmdP2CallMe);

    cmdOk = FindViewById<Button>(Resource.Id.cmdP2CallMe);    <-- reference error here
    cmdCancel = FindViewById<Button>(Resource.Id.cmdP2CallMe);<-- reference error here

：）

一些视图元素不会被隐藏，有些视图元素不会出现

1 个答案: