在方向改变RadioGroup中的行为 [英] radiogroup behavior on orientation change

问题描述

我希望有人能帮助我理解这是怎么回事就在Android RadioGroup中和onCheckedChanged回调时的方向变化。

I am hoping that someone can help me understand what's going on with respect to an Android radiogroup and the onCheckedChanged callbacks when the orientation changes.

我有三个单选按钮单选按钮组。第二个按钮被定义为通过设置检查属性为true默认。我对无线电集团的XML如下：

I have a radio group with three radio buttons. The second button is defined as the default by setting the checked attribute to true. My xml for the radio group is as follows:

    <RadioGroup
        android:id="@+id/rgReportRange"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:orientation="horizontal" >

        <RadioButton
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/One" />

        <RadioButton
            android:id="@+id/button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="@string/Two" />

        <RadioButton
            android:id="@+id/button3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/Three" />
    </RadioGroup>

该RadioGroup中有一个onCheckedChangedListener。当方向变化时，onCheckedChangedListener是基于方向变化之前选择了哪个按钮上被称为回不同。

The RadioGroup has an onCheckedChangedListener. When the orientation changes, the onCheckedChangedListener is being called back differently based on which button is selected before the orientation change.

如果选择按钮1，我看到一次回调以该onCheckedChanged法checkedID等于BUTTON1。

If button1 is selected, I see one callback to the onCheckedChanged method with checkedID equal to button1.

如果选择按钮2，我看不出回调至onCheckedChanged方法。

If button2 is selected, I see no callback to the onCheckedChanged method.

如果选择按钮3，我看到两个回调到onCheckedChanged方法。第一个回调checkedID等于BUTTON2。第二个回调checkedID等于按钮3。

If button3 is selected, I see two callbacks to the onCheckedChanged method. The first callback has checkedID equal to button2. The second callback has checkedID equal to button3.

我不理解在第一和第三例之间的行为的差异。在这两个，还有比选择了默认的单选按钮。

I don't understand the difference in behavior between the first and third cases. In both, there is a radio button other than the default selected.

推荐答案

打开manifest.xml文件，并在活动修改＆LT;>标签：

open your manifest.xml file and modify in Activity<> tag :

<activity
            android:configChanges="keyboardHidden|orientation"></activity>

在此之后检查结果是：：）

after this check your result : :)

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