Android\u539f\u751f\u81ea\u5e26\u7684RadioGroup\u4e0d\u652f\u6301\u5d4c\u5957RadioButton\uff08\u4ece\u6e90\u7801\u53ef\u770b\u51fa\u4ec5\u4ec5\u662f\u5224\u65ad\u5b50\u63a7\u4ef6\u662f\u4e0d\u662fRadioButton\uff09\uff0c\u53c2\u8003RadioGroup\u81ea\u5b9a\u4e49\u4e00\u4e2a\u652f\u6301\u5d4c\u5957CompoundButton\u7684\u63a7\u4ef6XRadioGroup\u3002<\/p>\n
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public class XRadioGroup extends LinearLayout {\n \/\/ holds the checked id; the selection is empty by default\n private int mCheckedId = -1;\n \/\/ tracks children radio buttons checked state\n private CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener;\n \/\/ when true, mOnCheckedChangeListener discards events\n private boolean mProtectFromCheckedChange = false;\n private OnCheckedChangeListener mOnCheckedChangeListener;\n private PassThroughHierarchyChangeListener mPassThroughListener;\n\n public XRadioGroup(Context context) {\n super(context);\n init();\n }\n\n public XRadioGroup(Context context, AttributeSet attrs) {\n super(context, attrs);\n init();\n }\n\n public XRadioGroup(Context context, AttributeSet attrs, int defStyleAttr) {\n super(context, attrs, defStyleAttr);\n init();\n }\n\n @TargetApi(Build.VERSION_CODES.LOLLIPOP)\n public XRadioGroup(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {\n super(context, attrs, defStyleAttr, defStyleRes);\n init();\n }\n\n private void init() {\n mChildOnCheckedChangeListener = new CheckedStateTracker();\n mPassThroughListener = new PassThroughHierarchyChangeListener();\n super.setOnHierarchyChangeListener(mPassThroughListener);\n }\n\n \/**\n * {@inheritDoc}\n *\/\n @Override\n public void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) {\n \/\/ the user listener is delegated to our pass-through listener\n mPassThroughListener.mOnHierarchyChangeListener = listener;\n }\n\n \/**\n * {@inheritDoc}\n *\/\n @Override\n protected void onFinishInflate() {\n super.onFinishInflate();\n\n \/\/ checks the appropriate radio button as requested in the XML file\n if (mCheckedId != -1) {\n mProtectFromCheckedChange = true;\n setCheckedStateForView(mCheckedId, true);\n mProtectFromCheckedChange = false;\n setCheckedId(mCheckedId);\n }\n }\n\n private void setViewState(View child) {\n if (child instanceof RadioButton) {\n final RadioButton button = (RadioButton) child;\n if (button.isChecked()) {\n mProtectFromCheckedChange = true;\n if (mCheckedId != -1) {\n setCheckedStateForView(mCheckedId, false);\n }\n mProtectFromCheckedChange = false;\n setCheckedId(button.getId());\n }\n } else if (child instanceof ViewGroup) {\n ViewGroup view = (ViewGroup) child;\n for (int i = 0; i < view.getChildCount(); i++) {\n setViewState(view.getChildAt(i));\n }\n }\n }\n\n @Override\n public void addView(View child, int index, ViewGroup.LayoutParams params) {\n setViewState(child);\n super.addView(child, index, params);\n }\n\n \/**\n * <p>Sets the selection to the radio button whose identifier is passed in\n * parameter. Using -1 as the selection identifier clears the selection;\n * such an operation is equivalent to invoking {@link #clearCheck()}.<\/p>\n *\n * @param id the unique id of the radio button to select in this group\n * @see #getCheckedRadioButtonId()\n * @see #clearCheck()\n *\/\n public void check(@IdRes int id) {\n \/\/ don't even bother\n if (id != -1 && (id == mCheckedId)) {\n return;\n }\n\n if (mCheckedId != -1) {\n setCheckedStateForView(mCheckedId, false);\n }\n\n if (id != -1) {\n setCheckedStateForView(id, true);\n }\n\n setCheckedId(id);\n }\n\n private void setCheckedId(@IdRes int id) {\n mCheckedId = id;\n if (mOnCheckedChangeListener != null) {\n mOnCheckedChangeListener.onCheckedChanged(this, mCheckedId);\n }\n }\n\n private void setCheckedStateForView(int viewId, boolean checked) {\n View checkedView = findViewById(viewId);\n if (checkedView != null && checkedView instanceof RadioButton) {\n ((RadioButton) checkedView).setChecked(checked);\n }\n }\n\n \/**\n * <p>Returns the identifier of the selected radio button in this group.\n * Upon empty selection, the returned value is -1.<\/p>\n *\n * @return the unique id of the selected radio button in this group\n * @attr ref android.R.styleable#RadioGroup_checkedButton\n * @see #check(int)\n * @see #clearCheck()\n *\/\n @IdRes\n public int getCheckedRadioButtonId() {\n return mCheckedId;\n }\n\n \/**\n * <p>Clears the selection. When the selection is cleared, no radio button\n * in this group is selected and {@link #getCheckedRadioButtonId()} returns\n * null.<\/p>\n *\n * @see #check(int)\n * @see #getCheckedRadioButtonId()\n *\/\n public void clearCheck() {\n check(-1);\n }\n\n \/**\n * <p>Register a callback to be invoked when the checked radio button\n * changes in this group.<\/p>\n *\n * @param listener the callback to call on checked state change\n *\/\n public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {\n mOnCheckedChangeListener = listener;\n }\n\n \/**\n * {@inheritDoc}\n *\/\n @Override\n public LayoutParams generateLayoutParams(AttributeSet attrs) {\n return new LayoutParams(getContext(), attrs);\n }\n\n \/**\n * {@inheritDoc}\n *\/\n @Override\n protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {\n return p instanceof LayoutParams;\n }\n\n @Override\n protected LinearLayout.LayoutParams generateDefaultLayoutParams() {\n return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);\n }\n\n @Override\n public CharSequence getAccessibilityClassName() {\n return XRadioGroup.class.getName();\n }\n\n \/**\n * <p>This set of layout parameters defaults the width and the height of\n * the children to {@link #WRAP_CONTENT} when they are not specified in the\n * XML file. Otherwise, this class ussed the value read from the XML file.<\/p>\n * <p\/>\n * <p>See\n * {@link LinearLayout Attributes}\n * for a list of all child view attributes that this class supports.<\/p>\n *\/\n public static class LayoutParams extends LinearLayout.LayoutParams {\n \/**\n * {@inheritDoc}\n *\/\n public LayoutParams(Context c, AttributeSet attrs) {\n super(c, attrs);\n }\n\n \/**\n * {@inheritDoc}\n *\/\n public LayoutParams(int w, int h) {\n super(w, h);\n }\n\n \/**\n * {@inheritDoc}\n *\/\n public LayoutParams(int w, int h, float initWeight) {\n super(w, h, initWeight);\n }\n\n \/**\n * {@inheritDoc}\n *\/\n public LayoutParams(ViewGroup.LayoutParams p) {\n super(p);\n }\n\n \/**\n * {@inheritDoc}\n *\/\n public LayoutParams(MarginLayoutParams source) {\n super(source);\n }\n\n \/**\n * <p>Fixes the child's width to\n * {@link ViewGroup.LayoutParams#WRAP_CONTENT} and the child's\n * height to {@link ViewGroup.LayoutParams#WRAP_CONTENT}\n * when not specified in the XML file.<\/p>\n *\n * @param a the styled attributes set\n * @param widthAttr the width attribute to fetch\n * @param heightAttr the height attribute to fetch\n *\/\n @Override\n protected void setBaseAttributes(TypedArray a,\n int widthAttr, int heightAttr) {\n\n if (a.hasValue(widthAttr)) {\n width = a.getLayoutDimension(widthAttr, "layout_width");\n } else {\n width = WRAP_CONTENT;\n }\n\n if (a.hasValue(heightAttr)) {\n height = a.getLayoutDimension(heightAttr, "layout_height");\n } else {\n height = WRAP_CONTENT;\n }\n }\n }\n\n \/**\n * <p>Interface definition for a callback to be invoked when the checked\n * radio button changed in this group.<\/p>\n *\/\n public interface OnCheckedChangeListener {\n \/**\n * <p>Called when the checked radio button has changed. When the\n * selection is cleared, checkedId is -1.<\/p>\n *\n * @param group the group in which the checked radio button has changed\n * @param checkedId the unique identifier of the newly checked radio button\n *\/\n public void onCheckedChanged(XRadioGroup group, @IdRes int checkedId);\n }\n\n private class CheckedStateTracker implements CompoundButton.OnCheckedChangeListener {\n public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {\n \/\/ prevents from infinite recursion\n if (mProtectFromCheckedChange) {\n return;\n }\n\n mProtectFromCheckedChange = true;\n if (mCheckedId != -1) {\n setCheckedStateForView(mCheckedId, false);\n }\n mProtectFromCheckedChange = false;\n\n int id = buttonView.getId();\n setCheckedId(id);\n }\n }\n\n \/**\n * <p>A pass-through listener acts upon the events and dispatches them\n * to another listener. This allows the table layout to set its own internal\n * hierarchy change listener without preventing the user to setup his.<\/p>\n *\/\n private class PassThroughHierarchyChangeListener implements\n OnHierarchyChangeListener {\n private OnHierarchyChangeListener mOnHierarchyChangeListener;\n\n \/**\n * {@inheritDoc}\n *\/\n public void onChildViewAdded(View parent, View child) {\n setListener(child);\n\n if (mOnHierarchyChangeListener != null) {\n mOnHierarchyChangeListener.onChildViewAdded(parent, child);\n }\n }\n\n \/**\n * {@inheritDoc}\n *\/\n public void onChildViewRemoved(View parent, View child) {\n removeListener(child);\n\n if (mOnHierarchyChangeListener != null) {\n mOnHierarchyChangeListener.onChildViewRemoved(parent, child);\n }\n }\n }\n\n \/**\n * \u8bbe\u7f6e\u76d1\u542c\n *\n * @param child\n *\/\n private void setListener(View child) {\n if (child instanceof RadioButton) {\n int id = child.getId();\n \/\/ generates an id if it's missing\n if (id == View.NO_ID) {\n id = child.hashCode();\n child.setId(id);\n }\n ((RadioButton) child).setOnCheckedChangeListener(\n mChildOnCheckedChangeListener);\n } else if (child instanceof ViewGroup) {\n ViewGroup view = (ViewGroup) child;\n for (int i = 0; i < view.getChildCount(); i++) {\n setListener(view.getChildAt(i));\n }\n }\n }\n\n \/**\n * \u79fb\u9664\u76d1\u542c\n *\n * @param child\n *\/\n private void removeListener(View child) {\n if (child instanceof RadioButton) {\n ((RadioButton) child).setOnCheckedChangeListener(null);\n } else if (child instanceof ViewGroup) {\n ViewGroup view = (ViewGroup) child;\n for (int i = 0; i < view.getChildCount(); i++) {\n removeListener(view.getChildAt(i));\n }\n }\n }\n}<\/code><\/pre>\n\u5f15\u7528XRadioGroup<\/h2>\nxRadioGroup.setOnCheckedChangeListener(new XRadioGroup.OnCheckedChangeListener() {\n @Override\n public void onCheckedChanged(XRadioGroup group, int checkedId) {\n switch (checkedId) {\n case R.id.rb_no_check:\n\n break;\n case R.id.rb_pass:\n\n break;\n case R.id.rb_no_pass:\n\n break;\n }\n }\n});<\/code><\/pre>\n<me.yezhou.lib.ui_widget.layout.XRadioGroup\n android:id="@+id\/x_radio_group"\n android:layout_width="0dp"\n android:layout_height="wrap_content"\n app:layout_constraintTop_toBottomOf="@id\/iv_photo"\n app:layout_constraintLeft_toLeftOf="parent"\n app:layout_constraintRight_toRightOf="parent"\n android:paddingTop="10dp"\n android:paddingBottom="10dp"\n android:orientation="horizontal"\n >\n <android.support.constraint.ConstraintLayout\n android:id="@+id\/layout_no_check"\n android:layout_width="match_parent"\n android:layout_height="wrap_content"\n android:layout_weight="1"\n >\n <RadioButton\n android:id="@+id\/rb_no_check"\n android:layout_width="25dp"\n android:layout_height="25dp"\n app:layout_constraintTop_toTopOf="parent"\n app:layout_constraintLeft_toLeftOf="parent"\n android:layout_marginLeft="20dp"\n android:button="@null"\n android:background="@drawable\/bg_checkbox"\n android:checked="true"\n \/>\n <TextView\n android:layout_width="wrap_content"\n android:layout_height="wrap_content"\n app:layout_constraintLeft_toRightOf="@id\/rb_no_check"\n app:layout_constraintTop_toTopOf="@id\/rb_no_check"\n app:layout_constraintBottom_toBottomOf="@id\/rb_no_check"\n android:layout_marginLeft="5dp"\n android:text="\u672a\u9009\u62e9"\n \/>\n <\/android.support.constraint.ConstraintLayout>\n <android.support.constraint.ConstraintLayout\n android:id="@+id\/layout_pass"\n android:layout_width="match_parent"\n android:layout_height="wrap_content"\n android:layout_weight="1"\n >\n <RadioButton\n android:id="@+id\/rb_pass"\n android:layout_width="25dp"\n android:layout_height="25dp"\n app:layout_constraintTop_toTopOf="parent"\n app:layout_constraintLeft_toLeftOf="parent"\n android:layout_marginLeft="20dp"\n android:button="@null"\n android:background="@drawable\/bg_checkbox"\n \/>\n <TextView\n android:layout_width="wrap_content"\n android:layout_height="wrap_content"\n app:layout_constraintLeft_toRightOf="@id\/rb_pass"\n app:layout_constraintTop_toTopOf="@id\/rb_pass"\n app:layout_constraintBottom_toBottomOf="@id\/rb_pass"\n android:layout_marginLeft="5dp"\n android:text="\u901a\u8fc7"\n \/>\n <\/android.support.constraint.ConstraintLayout>\n <android.support.constraint.ConstraintLayout\n android:id="@+id\/layout_no_pass"\n android:layout_width="match_parent"\n android:layout_height="wrap_content"\n android:layout_weight="1"\n >\n <RadioButton\n android:id="@+id\/rb_no_pass"\n android:layout_width="25dp"\n android:layout_height="25dp"\n app:layout_constraintTop_toTopOf="parent"\n app:layout_constraintLeft_toLeftOf="parent"\n android:layout_marginLeft="20dp"\n android:button="@null"\n android:background="@drawable\/bg_checkbox"\n \/>\n <TextView\n android:layout_width="wrap_content"\n android:layout_height="wrap_content"\n app:layout_constraintLeft_toRightOf="@id\/rb_no_pass"\n app:layout_constraintTop_toTopOf="@id\/rb_no_pass"\n app:layout_constraintBottom_toBottomOf="@id\/rb_no_pass"\n android:layout_marginLeft="5dp"\n android:text="\u672a\u9009\u62e9"\n \/>\n <\/android.support.constraint.ConstraintLayout>\n<\/me.yezhou.lib.ui_widget.layout.XRadioGroup><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"Android\u539f\u751f\u81ea\u5e26\u7684RadioGroup\u4e0d\u652f\u6301\u5d4c\u5957RadioButton\uff08\u4ece\u6e90\u7801\u53ef\u770b\u51fa\u4ec5\u4ec5\u662f\u5224\u65ad\u5b50\u63a7\u4ef6\u662f\u4e0d […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[311],"tags":[],"class_list":["post-2106","post","type-post","status-publish","format-standard","hentry","category-android-advance"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/2106","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=2106"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/2106\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=2106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=2106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=2106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}