() {
252 | public SavedState createFromParcel(Parcel in) {
253 | return new SavedState(in);
254 | }
255 |
256 | public SavedState[] newArray(int size) {
257 | return new SavedState[size];
258 | }
259 | };
260 | }
261 |
262 | @Override
263 | public Parcelable onSaveInstanceState() {
264 | Parcelable superState = super.onSaveInstanceState();
265 | SavedState ss = new SavedState(superState);
266 | ss.checked = isChecked();
267 | return ss;
268 | }
269 |
270 | @Override
271 | public void onRestoreInstanceState(Parcelable state) {
272 | SavedState ss = (SavedState) state;
273 | super.onRestoreInstanceState(ss.getSuperState());
274 | setChecked(ss.checked);
275 | requestLayout();
276 | }
277 |
278 | /**
279 | * On checked change callback interface.
280 | */
281 | public interface OnCheckedChangeListener {
282 | void onCheckedChanged(BaseRadioLayout baseRadioLayout, boolean checked);
283 | }
284 |
285 | }
286 |
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/LICENSE:
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/radiogrouplib/src/main/java/com/kyle/radiogrouplib/NestedRadioGroup.java:
--------------------------------------------------------------------------------
1 | package com.kyle.radiogrouplib;
2 |
3 | import android.content.Context;
4 | import android.content.res.TypedArray;
5 | import android.util.AttributeSet;
6 | import android.view.View;
7 | import android.view.ViewGroup;
8 | import android.view.accessibility.AccessibilityEvent;
9 | import android.view.accessibility.AccessibilityNodeInfo;
10 | import android.widget.LinearLayout;
11 |
12 | /**
13 | * Created by Jiang on 2018/8/2. 11:54
14 | * mail:jiangwei_android@163.com
15 | */
16 | public class NestedRadioGroup extends LinearLayout {
17 |
18 | private int mCheckedId = -1;
19 | private BaseRadioLayout.OnCheckedChangeListener mChildOnCheckedChangeListener;
20 | private boolean mProtectFromCheckedChange = false;
21 | private OnCheckedChangeListener mOnCheckedChangeListener;
22 | private PassThroughHierarchyChangeListener mPassThroughListener;
23 |
24 |
25 | public NestedRadioGroup(Context context) {
26 | super(context);
27 | setOrientation(VERTICAL);
28 | init();
29 | }
30 |
31 |
32 | public NestedRadioGroup(Context context, AttributeSet attrs) {
33 | super(context, attrs);
34 |
35 | TypedArray attributes = context.obtainStyledAttributes(
36 | attrs, R.styleable.NestedRadioGroup, R.attr.radioButtonStyle, 0);
37 |
38 | int value = attributes.getResourceId(R.styleable.NestedRadioGroup_checkedButton, View.NO_ID);
39 | if (value != View.NO_ID) {
40 | mCheckedId = value;
41 | }
42 |
43 | final int index = attributes.getInt(R.styleable.NestedRadioGroup_orientation, VERTICAL);
44 | setOrientation(index);
45 |
46 | attributes.recycle();
47 | init();
48 | }
49 |
50 | private void init() {
51 | mChildOnCheckedChangeListener = new CheckedStateTracker();
52 | mPassThroughListener = new PassThroughHierarchyChangeListener();
53 | super.setOnHierarchyChangeListener(mPassThroughListener);
54 | }
55 |
56 | /**
57 | * {@inheritDoc}
58 | */
59 | @Override
60 | public void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) {
61 |
62 | mPassThroughListener.mOnHierarchyChangeListener = listener;
63 | }
64 |
65 | /**
66 | * {@inheritDoc}
67 | */
68 | @Override
69 | protected void onFinishInflate() {
70 | super.onFinishInflate();
71 |
72 | // checks the appropriate radio button as requested in the XML file
73 | if (mCheckedId != -1) {
74 | mProtectFromCheckedChange = true;
75 | setCheckedStateForView(mCheckedId, true);
76 | mProtectFromCheckedChange = false;
77 | setCheckedId(mCheckedId);
78 | }
79 | }
80 |
81 | private void setViewState(View child) {
82 | if (child instanceof NestedRadioLayout) {
83 | final NestedRadioLayout button = (NestedRadioLayout) child;
84 | if (button.isChecked()) {
85 | mProtectFromCheckedChange = true;
86 | if (mCheckedId != -1) {
87 | setCheckedStateForView(mCheckedId, false);
88 | }
89 | mProtectFromCheckedChange = false;
90 | setCheckedId(button.getId());
91 | }
92 | } else if (child instanceof ViewGroup) {
93 | ViewGroup view = (ViewGroup) child;
94 | for (int i = 0; i < view.getChildCount(); i++) {
95 | setViewState(view.getChildAt(i));
96 | }
97 | }
98 | }
99 |
100 |
101 | @Override
102 | public void addView(View child, int index, ViewGroup.LayoutParams params) {
103 | setViewState(child);
104 | super.addView(child, index, params);
105 | }
106 |
107 | /**
108 | * Sets the selection to the radio button whose identifier is passed in
109 | * parameter. Using -1 as the selection identifier clears the selection;
110 | * such an operation is equivalent to invoking {@link #clearCheck()}.
111 | *
112 | * @param id the unique id of the radio button to select in this group
113 | * @see #getCheckedRadioLayoutId()
114 | * @see #clearCheck()
115 | */
116 | public void check(int id) {
117 | // don't even bother
118 | if (id != -1 && (id == mCheckedId)) {
119 | return;
120 | }
121 |
122 | if (mCheckedId != -1) {
123 | setCheckedStateForView(mCheckedId, false);
124 | }
125 |
126 | if (id != -1) {
127 | setCheckedStateForView(id, true);
128 | }
129 |
130 | setCheckedId(id);
131 | }
132 |
133 | private void setCheckedId(int id) {
134 | mCheckedId = id;
135 | if (mOnCheckedChangeListener != null) {
136 | mOnCheckedChangeListener.onCheckedChanged(this, mCheckedId);
137 | }
138 | }
139 |
140 | private void setCheckedStateForView(int viewId, boolean checked) {
141 | View checkedView = findViewById(viewId);
142 | if (checkedView != null && checkedView instanceof NestedRadioLayout) {
143 | ((NestedRadioLayout) checkedView).setChecked(checked);
144 |
145 | }
146 | }
147 |
148 | /**
149 | * Returns the identifier of the selected radio button in this group.
150 | * Upon empty selection, the returned value is -1.
151 | *
152 | * @return the unique id of the selected radio button in this group
153 | * @see #check(int)
154 | * @see #clearCheck()
155 | */
156 | public int getCheckedRadioLayoutId() {
157 | return mCheckedId;
158 | }
159 |
160 | /**
161 | * Clears the selection. When the selection is cleared, no radio button
162 | * in this group is selected and {@link #getCheckedRadioLayoutId()} returns
163 | * null.
164 | *
165 | * @see #check(int)
166 | * @see #getCheckedRadioLayoutId()
167 | */
168 | public void clearCheck() {
169 | check(-1);
170 | }
171 |
172 | /**
173 | * Register a callback to be invoked when the checked radio button
174 | * changes in this group.
175 | *
176 | * @param listener the callback to call on checked state change
177 | */
178 | public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {
179 | mOnCheckedChangeListener = listener;
180 | }
181 |
182 | /**
183 | * {@inheritDoc}
184 | */
185 | @Override
186 | public LayoutParams generateLayoutParams(AttributeSet attrs) {
187 | return new NestedRadioGroup.LayoutParams(getContext(), attrs);
188 | }
189 |
190 | /**
191 | * {@inheritDoc}
192 | */
193 | @Override
194 | protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
195 | return p instanceof NestedRadioGroup.LayoutParams;
196 | }
197 |
198 | @Override
199 | protected LinearLayout.LayoutParams generateDefaultLayoutParams() {
200 | return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
201 | }
202 |
203 | @Override
204 | public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
205 | super.onInitializeAccessibilityEvent(event);
206 | event.setClassName(NestedRadioGroup.class.getName());
207 | }
208 |
209 | @Override
210 | public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
211 | super.onInitializeAccessibilityNodeInfo(info);
212 | info.setClassName(NestedRadioGroup.class.getName());
213 | }
214 |
215 |
216 | public static class LayoutParams extends LinearLayout.LayoutParams {
217 | /**
218 | * {@inheritDoc}
219 | */
220 | public LayoutParams(Context c, AttributeSet attrs) {
221 | super(c, attrs);
222 | }
223 |
224 | /**
225 | * {@inheritDoc}
226 | */
227 | public LayoutParams(int w, int h) {
228 | super(w, h);
229 | }
230 |
231 | /**
232 | * {@inheritDoc}
233 | */
234 | public LayoutParams(int w, int h, float initWeight) {
235 | super(w, h, initWeight);
236 | }
237 |
238 | /**
239 | * {@inheritDoc}
240 | */
241 | public LayoutParams(ViewGroup.LayoutParams p) {
242 | super(p);
243 | }
244 |
245 | /**
246 | * {@inheritDoc}
247 | */
248 | public LayoutParams(MarginLayoutParams source) {
249 | super(source);
250 | }
251 |
252 | /**
253 | * Fixes the child's width to
254 | * {@link ViewGroup.LayoutParams#WRAP_CONTENT} and the child's
255 | * height to {@link ViewGroup.LayoutParams#WRAP_CONTENT}
256 | * when not specified in the XML file.
257 | *
258 | * @param a the styled attributes set
259 | * @param widthAttr the width attribute to fetch
260 | * @param heightAttr the height attribute to fetch
261 | */
262 | @Override
263 | protected void setBaseAttributes(TypedArray a,
264 | int widthAttr, int heightAttr) {
265 |
266 | if (a.hasValue(widthAttr)) {
267 | width = a.getLayoutDimension(widthAttr, "layout_width");
268 | } else {
269 | width = WRAP_CONTENT;
270 | }
271 |
272 | if (a.hasValue(heightAttr)) {
273 | height = a.getLayoutDimension(heightAttr, "layout_height");
274 | } else {
275 | height = WRAP_CONTENT;
276 | }
277 | }
278 | }
279 |
280 | /**
281 | * Interface definition for a callback to be invoked when the checked
282 | * radio button changed in this group.
283 | */
284 | public interface OnCheckedChangeListener {
285 | /**
286 | * Called when the checked radio button has changed. When the
287 | * selection is cleared, checkedId is -1.
288 | *
289 | * @param group the group in which the checked radio button has changed
290 | * @param checkedId the unique identifier of the newly checked radio button
291 | */
292 | public void onCheckedChanged(NestedRadioGroup group, int checkedId);
293 | }
294 |
295 | private class CheckedStateTracker implements BaseRadioLayout.OnCheckedChangeListener {
296 | @Override
297 | public void onCheckedChanged(BaseRadioLayout buttonView, boolean isChecked) {
298 | // prevents from infinite recursion
299 | if (mProtectFromCheckedChange) {
300 | return;
301 | }
302 |
303 | mProtectFromCheckedChange = true;
304 | if (mCheckedId != -1) {
305 | setCheckedStateForView(mCheckedId, false);
306 | }
307 | mProtectFromCheckedChange = false;
308 |
309 | int id = buttonView.getId();
310 | setCheckedId(id);
311 | }
312 | }
313 |
314 |
315 |
316 |
317 | /**
318 | * A pass-through listener acts upon the events and dispatches them
319 | * to another listener. This allows the table layout to set its own internal
320 | * hierarchy change listener without preventing the user to setup his.
321 | */
322 | private class PassThroughHierarchyChangeListener implements
323 | OnHierarchyChangeListener {
324 | private OnHierarchyChangeListener mOnHierarchyChangeListener;
325 |
326 | /**
327 | * {@inheritDoc}
328 | */
329 | public void onChildViewAdded(View parent, View child) {
330 | setListener(child);
331 |
332 | if (mOnHierarchyChangeListener != null) {
333 | mOnHierarchyChangeListener.onChildViewAdded(parent, child);
334 | }
335 | }
336 |
337 | /**
338 | * {@inheritDoc}
339 | */
340 | public void onChildViewRemoved(View parent, View child) {
341 | removeListener(child);
342 |
343 | if (mOnHierarchyChangeListener != null) {
344 | mOnHierarchyChangeListener.onChildViewRemoved(parent, child);
345 | }
346 | }
347 | }
348 |
349 | /**
350 | * 设置监听
351 | *
352 | * @param child
353 | */
354 | private void setListener(View child) {
355 |
356 |
357 | if (child instanceof NestedRadioLayout) {
358 | int id = child.getId();
359 | // generates an id if it's missing
360 | if (id == View.NO_ID) {
361 | id = child.hashCode();
362 | child.setId(id);
363 | }
364 | ((NestedRadioLayout) child).setOnCheckedChangeWidgetListener(
365 | mChildOnCheckedChangeListener);
366 | } else if (child instanceof ViewGroup) {
367 | ViewGroup view = (ViewGroup) child;
368 | for (int i = 0; i < view.getChildCount(); i++) {
369 | setListener(view.getChildAt(i));
370 | }
371 | }
372 | }
373 |
374 |
375 | /**
376 | * 移除监听
377 | *
378 | * @param child
379 | */
380 | private void removeListener(View child) {
381 | if (child instanceof NestedRadioLayout) {
382 | ((NestedRadioLayout) child).setOnCheckedChangeWidgetListener(null);
383 | } else if (child instanceof ViewGroup) {
384 | ViewGroup view = (ViewGroup) child;
385 | for (int i = 0; i < view.getChildCount(); i++) {
386 | removeListener(view.getChildAt(i));
387 | }
388 | }
389 | }
390 |
391 | }
392 |
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