为单选按钮自定义布局 [英] Custom layout for RadioButton

问题描述

有没有什么办法可以改变一个单选按钮的布局，并仍然有RadioGroup中识别它？

Is there any way I can change the layout for a RadioButton and still have the RadioGroup recognise it?

我所需要的是，布局将包括一对夫妇的EditText字段，这样，当用户选择该按钮那些字段变得活跃。 我知道我可以建立基于的LinearLayout定制部件和设置使用我自己的布局： （LinearLayout中）LayoutInflater.from（上下文）.inflate（R.layout.my_layout，这个，真） 但无法弄清楚如何做同样的事情用一个单选按钮。

what I need is that the layout will include a couple of EditText fields so that when the user selected that button those fields become active. I know I can built a custom part based on LinearLayout and set my own layout using: (LinearLayout) LayoutInflater.from(context).inflate(R.layout.my_layout, this, true) but can't figure out how to do the same thing with a radio button.

我试图具有RadioGroup中以外的额外的领域和排队它们与按钮的选项，但它根本不起作用。 它似乎是太依赖于设备的。

I have tried the option of having the extra fields outside the RadioGroup and lining them up with the button but it simply doesn't work. It seems to be too device-dependant.

这是原来的布局看起来像：

This is what the original layout looked like:

    <RadioGroup
    android:id="@+id/time_selector_radio_group"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_toLeftOf="@id/time_selector_hours_prompt"
    android:layout_below="@id/time_selector_hours_prompt"
    android:layout_alignParentRight="true"
    android:gravity="right"
    android:orientation="vertical"
    android:checkedButton="@+id/time_selector_first_radio"
    >

    <RadioButton
        android:id="@+id/time_selector_first_radio"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="1dip"
        android:button="@drawable/radio_button_selector"
        />
    <RadioButton
        android:id="@+id/time_selector_second_radio"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="1dip"
        android:button="@drawable/radio_button_selector"
        />
    <RadioButton
        android:id="@+id/time_selector_third_radio"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="1dip"
        android:button="@drawable/radio_button_selector"
        />
    <RadioButton
        android:id="@+id/time_selector_hours_radio"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="1dip"
        android:button="@drawable/radio_button_selector"
        />

</RadioGroup>
<TextView
    android:id="@+id/time_selector_all_day_prompt"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_toLeftOf="@id/time_selector_radio_group"
    android:layout_below="@id/time_selector_hours_prompt"
    android:layout_marginTop="11dip"
    android:text="@string/time_all_day"
    />
<TextView
    android:id="@+id/time_selector_before_noon_prompt"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_toLeftOf="@id/time_selector_radio_group"
    android:layout_below="@id/time_selector_all_day_prompt"
    android:layout_marginTop="19dip"
    android:text="@string/time_before_noon"
    />
<TextView
    android:id="@+id/time_selector_after_noon_prompt"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_toLeftOf="@id/time_selector_radio_group"
    android:layout_below="@id/time_selector_before_noon_prompt"
    android:layout_marginTop="19dip"
    android:text="@string/time_after_noon"
    />
<TextView
    android:id="@+id/time_selector_starting_time_prompt"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignRight="@id/time_selector_starting_date_prompt"
    android:layout_below="@id/time_selector_after_noon_prompt"
    android:layout_marginTop="20dip"
    android:layout_marginLeft="2dip"
    android:text="@string/advanced_time_selector_dialog_starting_time_prompt"
    />
<EditText
    android:id="@+id/time_selector_starting_time"
    android:layout_width="@dimen/advanced_time_selector_edit_texts_width"
    android:layout_height="wrap_content"
    android:layout_alignRight="@id/time_selector_starting_date"
    android:layout_alignBaseline="@id/time_selector_starting_time_prompt"
    android:textSize="14sp"
    android:paddingRight="10dip"
    android:paddingLeft="10dip"
    android:gravity="center"
    android:singleLine="true"
    android:maxWidth="@dimen/advanced_time_selector_edit_texts_width"
    android:background="@drawable/text_field_bg"
    android:inputType="datetime"
    />
<TextView
    android:id="@+id/time_selector_ending_time_prompt"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignRight="@id/time_selector_ending_date_prompt"
    android:layout_alignBottom="@id/time_selector_starting_time_prompt"
    android:layout_alignBaseline="@id/time_selector_starting_time_prompt"
    android:layout_marginRight="2dip"
    android:layout_marginLeft="2dip"
    android:text="@string/ending_date_prompt"
    />
<EditText
    android:id="@+id/time_selector_ending_time"
    android:layout_width="@dimen/advanced_time_selector_edit_texts_width"
    android:layout_height="wrap_content"
    android:layout_alignRight="@id/time_selector_ending_date"
    android:layout_alignBaseline="@id/time_selector_ending_time_prompt"
    android:textSize="14sp"
    android:paddingRight="10dip"
    android:paddingLeft="10dip"
    android:gravity="center"
    android:singleLine="true"
    android:maxWidth="@dimen/advanced_time_selector_edit_texts_width"
    android:background="@drawable/text_field_bg"
    android:inputType="datetime"
    />

请注意，该按钮没有任何文本，它是在一个TextView补充，使我们可以把它在左边。 发生了什么事情是，案文是攀升。

Note that the button doesn't have any text and it is added in a TextView so that we can have it on the left. What was happening was that the text was "creeping up".

所以，我把它改成这个样子：

So, I changed it to look like this:

<RadioGroup
    android:id="@+id/time_selector_radio_group"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_toLeftOf="@id/time_selector_hours_prompt"
    android:layout_below="@id/time_selector_hours_prompt"
    android:layout_alignParentRight="true"
    android:layout_marginRight="30dip"
    android:gravity="right"
    android:orientation="vertical"
    android:checkedButton="@+id/time_selector_first_radio"
    >

    <RadioButton
        android:id="@+id/time_selector_all_day_radio"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="1dip"
        android:button="@null"
        android:drawableRight="@drawable/radio_button_selector"
        android:text="@string/time_all_day"
        android:textColor="@color/content_text_color"
        />
    <RadioButton
        android:id="@+id/time_selector_before_noon_radio"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="1dip"
        android:button="@null"
        android:drawableRight="@drawable/radio_button_selector"
        android:text="@string/time_before_noon"
        android:textColor="@color/content_text_color"
        />

    <RadioButton
        android:id="@+id/time_selector_after_noon_radio"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="1dip"
        android:button="@null"
        android:drawableRight="@drawable/radio_button_selector"
        android:text="@string/time_after_noon"
        android:textColor="@color/content_text_color"
        />

    <RelativeLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal">   
        <RadioButton
            android:id="@+id/time_selector_hours_radio"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="1dip"
            android:button="@null"
            android:drawableRight="@drawable/radio_button_selector"
            android:layout_alignParentRight="true"
            android:text="@string/advanced_time_selector_dialog_starting_time_prompt"
            android:textColor="@color/content_text_color"
            android:layout_marginLeft="-1dip"
            android:paddingLeft="-1dip"
            />  
        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:layout_toLeftOf="@id/time_selector_hours_radio"
            android:layout_alignParentLeft="true">            
            <EditText
                android:id="@+id/time_selector_starting_time"
                android:layout_width="@dimen/advanced_time_selector_edit_texts_width"
                android:layout_height="wrap_content"
                android:textSize="14sp"
                android:paddingRight="10dip"
                android:paddingLeft="10dip"
                android:gravity="center"
                android:singleLine="true"
                android:maxWidth="@dimen/advanced_time_selector_edit_texts_width"
                android:background="@drawable/text_field_bg"
                android:layout_alignParentRight="true"
                android:layout_alignBaseline="@id/time_selector_hours_radio"
                android:inputType="datetime"
                />
            <TextView
                android:id="@+id/time_selector_ending_time_prompt"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_marginRight="2dip"
                android:layout_marginLeft="2dip"
                android:text="@string/ending_date_prompt"
                android:layout_alignBaseline="@id/time_selector_hours_radio"
                android:layout_toLeftOf="@id/time_selector_starting_time"
                />
            <EditText
                android:id="@+id/time_selector_ending_time"
                android:layout_width="@dimen/advanced_time_selector_edit_texts_width"
                android:layout_height="wrap_content"
                android:textSize="14sp"
                android:paddingRight="10dip"
                android:paddingLeft="10dip"
                android:gravity="center"
                android:singleLine="true"
                android:maxWidth="@dimen/advanced_time_selector_edit_texts_width"
                android:layout_toLeftOf="@id/time_selector_ending_time_prompt"
                android:layout_alignBaseline="@id/time_selector_hours_radio"
                android:background="@drawable/text_field_bg"
                android:inputType="datetime"
                />
        </RelativeLayout>
    </RelativeLayout>

</RadioGroup>

这还不够完善，当然，它不承认它作为一个RadioGroup中。

It is still not perfect and, of course, it doesn't recognise it as a RadioGroup.

我想去延长单选按钮的方向，但不知道如何改变布局那里。

I wanted to go the direction of extending the RadioButton but have no idea how to change the layout there.

推荐答案

您必须创建扩展RadioGroup中类，并重写 addView 和 PassThroughHierarchyChangeListener ，以便能够使用自定义布局进行单选按钮。默认情况下，RadioGroup中假定其子单选按钮，见$ C $从RadioGroup中类C以下：

You'll have to create a class that extends RadioGroup, and override addView and PassThroughHierarchyChangeListener, to be able to use custom layouts for your radio button. By default, RadioGroup assumes that its children are radio buttons, see code below from the RadioGroup class:

@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
    if (child instanceof RadioButton) {
        final RadioButton button = (RadioButton) child;
        if (button.isChecked()) {
            mProtectFromCheckedChange = true;
            if (mCheckedId != -1) {
                setCheckedStateForView(mCheckedId, false);
            }
            mProtectFromCheckedChange = false;
            setCheckedId(button.getId());
        }
    }

    super.addView(child, index, params);
}

private class PassThroughHierarchyChangeListener implements
        ViewGroup.OnHierarchyChangeListener {
    private ViewGroup.OnHierarchyChangeListener mOnHierarchyChangeListener;

    /**
     * {@inheritDoc}
     */
    public void onChildViewAdded(View parent, View child) {
        if (parent == RadioGroup.this && child instanceof RadioButton) {
            int id = child.getId();
            // generates an id if it's missing
            if (id == View.NO_ID) {
                id = View.generateViewId();
                child.setId(id);
            }
            ((RadioButton) child).setOnCheckedChangeWidgetListener(
                    mChildOnCheckedChangeListener);
        }

        if (mOnHierarchyChangeListener != null) {
            mOnHierarchyChangeListener.onChildViewAdded(parent, child);
        }
    }

    /**
     * {@inheritDoc}
     */
    public void onChildViewRemoved(View parent, View child) {
        if (parent == RadioGroup.this && child instanceof RadioButton) {
            ((RadioButton) child).setOnCheckedChangeWidgetListener(null);
        }

        if (mOnHierarchyChangeListener != null) {
            mOnHierarchyChangeListener.onChildViewRemoved(parent, child);
        }
    }
}

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