Question

我有一个自定义对话框（扩展Dialog），其内容视图是自定义视图组。视图组有一些edittext子项，但我在viewgroup的dispatchDraw和onTouch方法中处理绘图和单击按钮（我试图避免尽可能多地扩展视图）。 具体来说：此视图没有按钮子项，我可以将其设置为对话框的“关闭”按钮。我想从视图组的onTouch方法中删除对话框，但除了模拟按下后退键之外，我无法弄清楚如何做到这一点。

活动代码：

public class My_Activity extends Activity { ... public void onCreate(Bundle savedInstanceState) { ... //if there's no Class_That_Im_Editing in the database, prompt the user to make a new one by adding information to the editviews in this custom dialog and clicking the area where I draw the ok button my_dialog = new Custom_Dialog(this, R.style.CustomDlg, new Class_That_Im_Editing()); } }

对话框代码：

public class Custom_Dialog extends Dialog { ... public void onCreate(Bundle savedInstanceState) { ... setContentView(new Custom_ViewGroup(context, Class_That_Im_Editing)); } }

查看组代码：

public class Custom_ViewGroup extends ViewGroup implements OnTouchListener { //this class has some edittext children but _no_ buttons ... public boolean onTouch(View view, MotionEvent event) { if ( logic checking if the user has clicked the button area ) { //??? what do I put here to dismiss the dialog } } }

我能想到的另一种方法是使用dismissDialog（int）方法，这意味着重写onCreateDialog和onPrepareDialog事件处理程序。但是如何在视图的onTouch方法中调用dismissDialog？

也许我需要建立某种倾听者？如果是这样，那么执行此操作的框架代码是什么？

Answer 1

所以当我不在对话框存在的范围内时，问题是告诉对话框解除（）。这是我的解决方案：

在与对话框相同的范围内创建OnTouchListener - 在本例中，在我的主要活动中。然后在初始化对话框时传递它，然后需要将其传递给视图组。

看起来像这样：

活动代码：

public class My_Activity extends Activity {
    public Custom_Dialog my_dialog;
    ...
    public void onCreate(Bundle savedInstanceState) {
        OnTouchListener otl_custom_dialog = new OnTouchListener() {
            public boolean onTouch(View view, MotionEvent event) {
                if ( logic checking if the user has clicked the button area ) {
                    //notice I can still access any _public_ variable within the viewgroup class
                    //by using my_dialog.my_custom_viewgroup.public_variable
                    ...
                    //I can now call dismiss() from within this scope
                    my_dialog.dismiss();
                }
                ...
            }
        }
        ...
        //if there's no Class_That_Im_Editing in the database, prompt the user to make a new one by adding information to the editviews in this custom dialog and clicking the area where I draw the ok button
        my_dialog = new Custom_Dialog(this, R.style.CustomDlg, new Class_That_Im_Editing(), otl_custom_dialog);
        my_dialog.show();
    }
}

对话框代码：

public class Custom_Dialog extends Dialog {
    Custom_ViewGroup my_custom_viewgroup;
    OnTouchListener otl_custom_dialog;
    ...
        public void onCreate(Bundle savedInstanceState) {
            ...
            setContentView(new Custom_ViewGroup(context, class_that_im_editing, otl_custom_dialog));
        }
}

查看组代码：

public class Custom_ViewGroup extends ViewGroup implements OnTouchListener {
    public Custom_ViewGroup(Context context, Class_That_Im_Editing class_that_im_editing, OnTouchListener otl_custom_dialog) {
        ...
        this.setOnTouchListener(otl_custom_dialog);
    }
}

我测试过这种方法，但效果很好。希望这可以帮助其他人！

从非xml内容视图中删除对话框

1 个答案: