RadioGroup+RadioButton嵌套其他布局实现多行单选布局、自定义RadioButton选中和非选中样式、文字颜色_radiogroup 里可以放其他控件吗

作者：Gausst松鼠会 | 2024-06-18 04:42:40

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radiogroup 里可以放其他控件吗

上面两个图的需求都是要实现在多行中实现单选，本次以第二张图片的实现为例：
考虑到使用RadioGroup和RadioButton来做到单选的效果，为了实现上面的布局，在RadioGroup中嵌套了LinearLayout，然后在LinearLayout中分别加入相应的RadioButton。
运行起来看看效果，发现这样写就让RadioButton本身的“选择互斥性”丧失了。也就无法满足我们的需求。
所以，我们自定义RadioGroup（此RadioGroup来源在文末，由于使用中有些小问题，这里修改了一下），解决RadioGroup嵌套其他布局后 RadioButton不再互斥的问题


public class MyRadioGroup extends LinearLayout {
    // holds the checked id; the selection is empty by default
    private int mCheckedId = -1;
    // tracks children radio buttons checked state
    private CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener;
    // when true, mOnCheckedChangeListener discards events
    private boolean mProtectFromCheckedChange = false;
    private OnCheckedChangeListener mOnCheckedChangeListener;
    private PassThroughHierarchyChangeListener mPassThroughListener;
 
    /**
     * {@inheritDoc}
     */
    public MyRadioGroup(Context context) {
        super(context);
        setOrientation(VERTICAL);
        init();
    }
 
    /**
     * {@inheritDoc}
     */
    public MyRadioGroup(Context context, AttributeSet attrs) {
        super(context, attrs);
        mCheckedId = View.NO_ID;
 
        final int index = VERTICAL;
        setOrientation(index);
 
        init();
    }
 
    private void init() {
        mChildOnCheckedChangeListener = new CheckedStateTracker();
        mPassThroughListener = new PassThroughHierarchyChangeListener();
        super.setOnHierarchyChangeListener(mPassThroughListener);
    }
 
    /**
     * {@inheritDoc}
     */
    @Override
    public void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) {
        // the user listener is delegated to our pass-through listener
        mPassThroughListener.mOnHierarchyChangeListener = listener;
    }
 
    /**
     * {@inheritDoc}
     */
    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
 
        // checks the appropriate radio button as requested in the XML file
        if (mCheckedId != -1) {
            mProtectFromCheckedChange = true;
            setCheckedStateForView(mCheckedId, true);
            mProtectFromCheckedChange = false;
            setCheckedId(mCheckedId);
        }
    }
 
    @Override
    public void addView(final View child, int index, ViewGroup.LayoutParams params) {
        if (child instanceof RadioButton) {
            child.setOnTouchListener(new OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    if (event.getAction() == MotionEvent.ACTION_DOWN && !((RadioButton) child).isChecked()) {
                        ((RadioButton) child).setChecked(true);
                        checkRadioButton((RadioButton) child);
                        if (mOnCheckedChangeListener != null) {
                            mOnCheckedChangeListener.onCheckedChanged(MyRadioGroup.this, child.getId());
                        }
                    }
                    return true;
                }
            });
 
        } else if (child instanceof LinearLayout) {
            int childCount = ((LinearLayout) child).getChildCount();
            for (int i = 0; i < childCount; i++) {
                View view = ((LinearLayout) child).getChildAt(i);
                if (view instanceof RadioButton) {
                    final RadioButton button = (RadioButton) view;
                    button.setOnTouchListener(new OnTouchListener() {
                        @Override
                        public boolean onTouch(View v, MotionEvent event) {
                            if (event.getAction() == MotionEvent.ACTION_DOWN && !button.isChecked()) {
                                button.setChecked(true);
                                checkRadioButton(button);
                                if (mOnCheckedChangeListener != null) {
                                    mOnCheckedChangeListener.onCheckedChanged(MyRadioGroup.this, button.getId());
                                }
                            }
                            return true;
                        }
                    });
 
                }
            }
        }
 
        super.addView(child, index, params);
    }
 
    private void checkRadioButton(RadioButton radioButton) {
        View child;
        int radioCount = getChildCount();
        for (int i = 0; i < radioCount; i++) {
            child = getChildAt(i);
            if (child instanceof RadioButton) {
                if (child == radioButton) {
                    // do nothing
                } else {
                    ((RadioButton) child).setChecked(false);
                }
            } else if (child instanceof LinearLayout) {
                int childCount = ((LinearLayout) child).getChildCount();
                for (int j = 0; j < childCount; j++) {
                    View view = ((LinearLayout) child).getChildAt(j);
                    if (view instanceof RadioButton) {
                        final RadioButton button = (RadioButton) view;
                        if (button == radioButton) {
                            // do nothing
                        } else {
                            ((RadioButton) button).setChecked(false);
                        }
                    }
                }
            }
        }
    }
 
    /**
     * <p>Sets the selection to the radio button whose identifier is passed in
     * parameter. Using -1 as the selection identifier clears the selection;
     * such an operation is equivalent to invoking {@link #clearCheck()}.</p>
     *
     * @param id the unique id of the radio button to select in this group
     * @see #getCheckedRadioButtonId()
     * @see #clearCheck()
     */
    public void check(int id) {
        // don't even bother
        if (id != -1 && (id == mCheckedId)) {
            return;
        }
 
        if (mCheckedId != -1) {
            setCheckedStateForView(mCheckedId, false);
        }
 
        if (id != -1) {
            setCheckedStateForView(id, true);
        }
 
        setCheckedId(id);
    }
 
    private void setCheckedId(int id) {
        mCheckedId = id;
    }
 
    private void setCheckedStateForView(int viewId, boolean checked) {
        View checkedView = findViewById(viewId);
        if (checkedView != null && checkedView instanceof RadioButton) {
            ((RadioButton) checkedView).setChecked(checked);
        }
    }
 
    /**
     * <p>Returns the identifier of the selected radio button in this group.
     * Upon empty selection, the returned value is -1.</p>
     *
     * @return the unique id of the selected radio button in this group
     * @attr ref android.R.styleable#RadioGroup_checkedButton
     * @see #check(int)
     * @see #clearCheck()
     */
    public int getCheckedRadioButtonId() {
        return mCheckedId;
    }
 
    /**
     * <p>Clears the selection. When the selection is cleared, no radio button
     * in this group is selected and {@link #getCheckedRadioButtonId()} returns
     * null.</p>
     *
     * @see #check(int)
     * @see #getCheckedRadioButtonId()
     */
    public void clearCheck() {
        check(-1);
    }
 
    /**
     * <p>Register a callback to be invoked when the checked radio button
     * changes in this group.</p>
     *
     * @param listener the callback to call on checked state change
     */
    public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {
        mOnCheckedChangeListener = listener;
    }
 
    /**
     * {@inheritDoc}
     */
    @Override
    public LayoutParams generateLayoutParams(AttributeSet attrs) {
        return new MyRadioGroup.LayoutParams(getContext(), attrs);
    }
 
    /**
     * {@inheritDoc}
     */
    @Override
    protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
        return p instanceof RadioGroup.LayoutParams;
    }
 
    @Override
    protected LinearLayout.LayoutParams generateDefaultLayoutParams() {
        return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    }
 
    @Override
    public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
        super.onInitializeAccessibilityEvent(event);
        event.setClassName(RadioGroup.class.getName());
    }
 
    @Override
    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
        super.onInitializeAccessibilityNodeInfo(info);
        info.setClassName(RadioGroup.class.getName());
    }
 
    /**
     * <p>This set of layout parameters defaults the width and the height of
     * the children to {@link #WRAP_CONTENT} when they are not specified in the
     * XML file. Otherwise, this class ussed the value read from the XML file.</p>
     * <p>
     * <p>See
     * for a list of all child view attributes that this class supports.</p>
     */
    public static class LayoutParams extends LinearLayout.LayoutParams {
        /**
         * {@inheritDoc}
         */
        public LayoutParams(Context c, AttributeSet attrs) {
            super(c, attrs);
        }
 
        /**
         * {@inheritDoc}
         */
        public LayoutParams(int w, int h) {
            super(w, h);
        }
 
        /**
         * {@inheritDoc}
         */
        public LayoutParams(int w, int h, float initWeight) {
            super(w, h, initWeight);
        }
 
        /**
         * {@inheritDoc}
         */
        public LayoutParams(ViewGroup.LayoutParams p) {
            super(p);
        }
 
        /**
         * {@inheritDoc}
         */
        public LayoutParams(MarginLayoutParams source) {
            super(source);
        }
 
        /**
         * <p>Fixes the child's width to
         * {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT} and the child's
         * height to  {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT}
         * when not specified in the XML file.</p>
         *
         * @param a          the styled attributes set
         * @param widthAttr  the width attribute to fetch
         * @param heightAttr the height attribute to fetch
         */
        @Override
        protected void setBaseAttributes(TypedArray a,
                                         int widthAttr, int heightAttr) {
 
            if (a.hasValue(widthAttr)) {
                width = a.getLayoutDimension(widthAttr, "layout_width");
            } else {
                width = WRAP_CONTENT;
            }
 
            if (a.hasValue(heightAttr)) {
                height = a.getLayoutDimension(heightAttr, "layout_height");
            } else {
                height = WRAP_CONTENT;
            }
        }
    }
 
    /**
     * <p>Interface definition for a callback to be invoked when the checked
     * radio button changed in this group.</p>
     */
    public interface OnCheckedChangeListener {
        /**
         * <p>Called when the checked radio button has changed. When the
         * selection is cleared, checkedId is -1.</p>
         *
         * @param group     the group in which the checked radio button has changed
         * @param checkedId the unique identifier of the newly checked radio button
         */
        public void onCheckedChanged(MyRadioGroup group, int checkedId);
    }
 
    private class CheckedStateTracker implements CompoundButton.OnCheckedChangeListener {
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            // prevents from infinite recursion
            if (mProtectFromCheckedChange) {
                return;
            }
 
            mProtectFromCheckedChange = true;
            if (mCheckedId != -1) {
                setCheckedStateForView(mCheckedId, false);
            }
            mProtectFromCheckedChange = false;
 
            int id = buttonView.getId();
            setCheckedId(id);
        }
    }
 
    /**
     * <p>A pass-through listener acts upon the events and dispatches them
     * to another listener. This allows the table layout to set its own internal
     * hierarchy change listener without preventing the user to setup his.</p>
     */
    private class PassThroughHierarchyChangeListener implements
            ViewGroup.OnHierarchyChangeListener {
        private ViewGroup.OnHierarchyChangeListener mOnHierarchyChangeListener;
 
        /**
         * {@inheritDoc}
         */
        public void onChildViewAdded(View parent, View child) {
            if (parent == MyRadioGroup.this && child instanceof RadioButton) {
                int id = child.getId();
                // generates an id if it's missing
                if (id == View.NO_ID) {
                    id = child.hashCode();
                    child.setId(id);
                }
                ((RadioButton) child).setOnCheckedChangeListener(
                        mChildOnCheckedChangeListener);
            }
 
            if (mOnHierarchyChangeListener != null) {
                mOnHierarchyChangeListener.onChildViewAdded(parent, child);
            }
        }
 
        /**
         * {@inheritDoc}
         */
        public void onChildViewRemoved(View parent, View child) {
            if (parent == MyRadioGroup.this && child instanceof RadioButton) {
                ((RadioButton) child).setOnCheckedChangeListener(null);
            }
 
            if (mOnHierarchyChangeListener != null) {
                mOnHierarchyChangeListener.onChildViewRemoved(parent, child);
            }
        }
    }
}

布局文件中使用：


            <com.roboocean.robosea.view.MyRadioGroup
                android:layout_width="match_parent"
                android:layout_height="wrap_content">
                <LinearLayout style="@style/linearLayout_device_setting_nomal">
                    <TextView
                        style="@style/textview_fps"
                        android:text="1440P" />
                    <RadioButton
                        android:id="@+id/mFPS_1440_30"
                        style="@style/radiobutton_fps"
                        android:layout_marginRight="@dimen/x60"
                        android:text="@string/fps_30" />
                </LinearLayout>
                <View
                    android:layout_width="match_parent"
                    android:layout_height="@dimen/y1"
                    android:background="@color/bottom_line" />
                <LinearLayout style="@style/linearLayout_device_setting_nomal">
                    <TextView
                        style="@style/textview_fps"
                        android:text="1080P" />
                    <RadioButton
                        android:checked="true"
                        android:id="@+id/mFPS_1080_30"
                        style="@style/radiobutton_fps"
                        android:layout_marginRight="@dimen/x40"
                        android:text="@string/fps_30" />
                    <RadioButton
                        android:id="@+id/mFPS_1080_60"
                        style="@style/radiobutton_fps"
                        android:layout_marginRight="@dimen/x60"
                        android:text="@string/fps_60" />
                </LinearLayout>
                <View
                    android:layout_width="match_parent"
                    android:layout_height="@dimen/y1"
                    android:background="@color/bottom_line" />
                <LinearLayout style="@style/linearLayout_device_setting_nomal">
                    <TextView
                        style="@style/textview_fps"
                        android:text="720P" />
                    <RadioButton
                        android:id="@+id/mFPS_720_30"
                        style="@style/radiobutton_fps"
                        android:layout_marginRight="@dimen/x40"
                        android:text="@string/fps_30" />
                    <RadioButton
                        android:id="@+id/mFPS_720_60"
                        style="@style/radiobutton_fps"
                        android:layout_marginRight="@dimen/x60"
                        android:text="@string/fps_60" />
                </LinearLayout>
            </com.roboocean.robosea.view.MyRadioGroup>