Question

在我的应用程序中，我有一个自定义AlertDialog（由系统使用showDialog（）处理），其中包含一个带有2个选项卡的tabhost。其中一个标签是一个旋转器。只要微调器未打开（显示微调器对话框），我就可以毫无问题地旋转屏幕。如果旋转器在旋转过程中打开，我会得到：

FATAL EXCEPTION: main
java.lang.IllegalArgumentException: View not attached to window manager
    at android.view.WindowManagerImpl.findViewLocked(WindowManagerImpl.java:355)
    at android.view.WindowManagerImpl.removeView(WindowManagerImpl.java:200)
    at android.view.Window$LocalWindowManager.removeView(Window.java:432)
    at android.app.Dialog.dismissDialog(Dialog.java:278)
    at android.app.Dialog.access$000(Dialog.java:71)
    at android.app.Dialog$1.run(Dialog.java:111)
    at android.app.Dialog.dismiss(Dialog.java:268)
    at android.widget.Spinner.onDetachedFromWindow(Spinner.java:89)
    at android.view.View.dispatchDetachedFromWindow(View.java:6173)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1164)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1162)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1162)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1162)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1162)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1162)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1162)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1162)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1162)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1162)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1162)
    at android.view.ViewGroup.dispatchDetachedFromWindow(ViewGroup.java:1162)
    at android.view.ViewRoot.dispatchDetachedFromWindow(ViewRoot.java:1746)
    at android.view.ViewRoot.doDie(ViewRoot.java:2757)
    at android.view.ViewRoot.handleMessage(ViewRoot.java:1995)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:130)
    at android.app.ActivityThread.main(ActivityThread.java:3683)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:507)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
    at dalvik.system.NativeStart.main(Native Method)

因此...

1 - 是否可以在onPause()期间以编程方式关闭微调器？

2 - 我应该使用不同的方法吗？

3 - 如果没有合适的解决方案，我该如何捕捉这个特殊的例外？（我知道不好的做法，但需要停止崩溃，并且由于活动在被销毁后正确地重建自己，无论如何都无关紧要。

...请为所有圣洁的爱而欢迎，不要建议我在活动声明中添加android:configChanges="orientation"。令我感到惊讶的是，作为定向问题的官方解决方案，这种情况经常被接受。

修改其他信息

这是我的对话框创建代码供参考：

static final int ID_DIALOG_CHOOSER = 1;
int pref_location;
private Dialog dialog;

...

protected Dialog onCreateDialog(int id)
{
    switch(id)
    {
    case ID_DIALOG_CHOOSER:
        dialog = show(ID_DIALOG_CHOOSER);
        break;
    }
    return dialog;
}

...

showDialog(DialogView.ID_DIALOG_CHOOSER);

...

Dialog show(final int dialogType) 
{
    if (dialogType == ID_DIALOG_CHOOSER)
    {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);

        // inflate tabhost layout
        View tabHostLayout = (View) inflater.inflate(R.layout.tabhost_layout, null);
        FrameLayout tabContent = (FrameLayout) tabHostLayout.findViewById(android.R.id.tabcontent);

        // inflate tab content layouts and add to tabhost layout
        LinearLayout tab1 = (LinearLayout) inflater.inflate(R.layout.dialog_tab1, null);
        tabContent.addView(tab1);
        LinearLayout tab2 = (LinearLayout) inflater.inflate(R.layout.dialog_tab2, null);
        tabContent.addView(tab2);

        // tab setup
        TabHost tabHost = (TabHost) tabHostLayout.findViewById(R.id.TabHost_Dialog_Tabs);
        tabHost.setup();

        TabHost.TabSpec tab_1 = tabHost.newTabSpec("Category 1");
        tab_1.setContent(R.id.LinearLayout_Dialog_Tab1_Content);
        tab_1.setIndicator(this.getResources().getString(R.string.dialog_tab1), this.getResources().getDrawable(R.drawable.tabhost_icon_selector));
        tabHost.addTab(tab_1);

        TabHost.TabSpec tab_2 = tabHost.newTabSpec("Category 2");
        tab_2.setContent(R.id.LinearLayout_Dialog_Tab2_Content);
        tab_2.setIndicator(this.getResources().getString(R.string.dialog_tab2), this.getResources().getDrawable(R.drawable.tabhost_icon_selector));
        tabHost.addTab(tab_2);

        // spinner setup
        final Spinner spinner_location = (Spinner) tab1.findViewById(R.id.Spinner_Dialog_Location);
        String[] locationArrayVals = null;
        ArrayAdapter<CharSequence> adapter_location = null;
        locationArrayVals = this.getResources().getStringArray(R.array.location_array_vals);
        adapter_location = ArrayAdapter.createFromResource(this, R.array.location_array_listdisplay, android.R.layout.simple_spinner_item);
        adapter_location.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner_location.setAdapter(adapter_location);

        // ok button
        Button button_ok = (Button) tab1.findViewById(R.id.Button_Dialog_OK);
        button_ok.setOnClickListener(new View.OnClickListener() 
        {
            public void onClick(View view) 
            {
                pref_location = spinner_location.getSelectedItemPosition();
                dialog.dismiss();
            }
        });

        // create dialog
        builder.setTitle("Location")
        .setView(tabHost)
        .setCancelable(true);
        dialog = builder.create();
    }
    return dialog;
}

使用临时解决方法进行编辑

对于任何感兴趣的人，我设法通过子类化微调器并覆盖onDetachedFromWindow()来至少停止崩溃：

public static class CatchingSpinner extends Spinner
{
    public CatchingSpinner(Context context, AttributeSet attrs) 
    {
        super(context, attrs);
    }

    @Override
    protected void onDetachedFromWindow()
    {
        try
        {
            super.onDetachedFromWindow();
        }
        catch (IllegalArgumentException e)
        {
            // do whatever
        }
    } 
}

像我说的那样，一种解决方法。仍在努力解决方案。：/

Answer 1

我找到了更好的解决方案。用一个看起来和行为像Spinner的按钮替换Spinner实际上并不是那么困难（幸运的是崩溃除外）。

<Button 
     android:background="@android:drawable/btn_dropdown" 
     android:gravity="left|center_vertical"
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" />

public void showSpinner() {
    AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
    builder.setTitle(_spinnerPrompt);
    builder.setSingleChoiceItems(_spinnerOptions, _spinnerSelection,
      new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int item) {
            _spinnerSelection = item;
            _pseudoSpinner.setText(_spinnerOptions[item]);
            _restoreSpinnerOnRestart = false;
            dialog.dismiss();
        }
    });
    builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
        @Override
        public void onCancel(DialogInterface dialog) {
            _restoreSpinnerOnRestart = false;
        }
    });
    AlertDialog alert = builder.create();
    _restoreSpinnerOnRestart = true;
    alert.show();
    }

@Override
public Bundle onSaveInstanceState() {
    Bundle state = super.onSaveInstanceState();
    state.putBoolean(STATE_SPINNER_RESTORE, _restoreSpinnerOnRestart);
    state.putInt(STATE_SPINNER_SELECTION, _spinnerSelection);
    return state;
};

@Override
public void onRestoreInstanceState(Bundle savedInstanceState) {
    super.onRestoreInstanceState(savedInstanceState);
    _spinnerSelection = savedInstanceState.getInt(STATE_SPINNER_SELECTION, -1);
    _restoreSpinnerOnRestart = savedInstanceState.getBoolean(STATE_SPINNER_RESTORE);
    _pseudoSpinner.setText(_spinnerOptions[_spinnerSelection]);

    if (_restoreSpinnerOnRestart) {
        showSpinner();
    }
};

Answer 2

好的，我想我找到了你的问题：dialog.dismiss();
你做的确很奇怪 - 你正在通过活动创建对话，但是说不要忽视它 - 这是两种不同的方法，你不能混合。您应该选择一种方法：dialog.show和dialog.dismiss或activity.showDialog（）和activity.dismissDialog（）＆lt; - 这是更好的，因为处理方向更改。
你应该做的只是从类变量中删除对话框，到处使用activity.showDialog。可能你的问题是在onClick中解雇对话框。只需使用YourActivityName.this.dismissDialog（DIALOG_NUMBER）即可使用。
阅读更多关于开发者网站对话框的信息 - 我也有这样的问题并花了很长时间来了解它是如何工作的，但毕竟 - 对话框并不那么复杂;）

Answer 3

我遇到了类似的崩溃。我在显示对话框时禁用了方向更改。

@Override
public void onDismiss(DialogInterface dialog) {
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
}

@Override
public void onShow(DialogInterface dialog) {
    int loadedOrientation = getResources().getConfiguration().orientation;
    int requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED;
    if (loadedOrientation == Configuration.ORIENTATION_LANDSCAPE) {
        requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE;
    } else if (loadedOrientation == Configuration.ORIENTATION_PORTRAIT) {
        requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_PORTRAIT;
    }
    setRequestedOrientation(requestedOrientation);
}

注意：我实际上发现lock screen orientation没有可靠的方法。

当自定义alertdialog具有打开的微调器时，处理方向更改的正确方法是什么？

3 个答案: