自定义控件：自定义RadioGroup和RadioButton，让布局有更多选择

转载请注明出处：http://blog.csdn.net/wriar/article/details/79004334

android的系统控件RadioGroup布局继承的是LinearLayout，所以只能实现这样单行或者单列的





也很容易实现

但是有时候会是这种多行多列布局



遇到这种情况RadioGroup就没用了。

况且单个选项的布局有可能会很复杂，RadioButton内又不能设置复杂布局

为了解决这个问题我写了一套自定义的RadioGroup和RadioButton，RadioGroup继承了GridLayout，已适配更复杂的布局情况，RadioButton继承了FrameLayout，里面的布局随便写

看效果图，动图我就不折腾了



贴代码：

/**
* 说明
* <p>
* android:columnCount="3"  几列
* android:rowCount="3"     几行
* android:checkedButton="@+id/mrb1"  选中哪个
*/

/**
* @author hp
* @ClassName MRadioGroup
* @Description: android:checkedButton="@+id/mrb1"
* @date 2018/1/5 0005
*/
public class MRadioGroup extends GridLayout {
// holds the checked id; the selection is empty by default
private int mCheckedId = -1;
private boolean mProtectFromCheckedChange = false;
private OnCheckedChangeListener mOnCheckedChangeListener;

private MRadioButton.OnCheckedChangeListener mChildOnCheckedChangeListener;
private PassThroughHierarchyChangeListener mPassThroughListener;

public MRadioGroup(Context context) {
super(context);
init();
}

public MRadioGroup(Context context, AttributeSet attrs) {
super(context, attrs);
// retrieve selected radio button as requested by the user in the
// XML layout file
TypedArray attributes = context.obtainStyledAttributes(
attrs, getInternalRS("styleable", "RadioGroup"), getInternalR("attr", "radioButtonStyle"), 0);

int value = attributes.getResourceId(getInternalR("styleable", "RadioGroup_checkedButton"), View.NO_ID);
if (value != View.NO_ID) {
mCheckedId = value;
Log.e("MINE", "setChecked mCheckedId:" + mCheckedId);
}
attributes.recycle();
init();
}

private void init() {
mChildOnCheckedChangeListener = new CheckedStateTracker();
mPassThroughListener = new PassThroughHierarchyChangeListener();
super.setOnHierarchyChangeListener(mPassThroughListener);
}

/**
* <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 void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) {
// the user listener is delegated to our pass-through listener
mPassThroughListener.mOnHierarchyChangeListener = listener;
}

/**
* <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(View group, @IdRes int checkedId);
}

/**
* {@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);
}
}

private class CheckedStateTracker implements MRadioButton.OnCheckedChangeListener {

@Override
public void onCheckedChanged(View 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);
}
}

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

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

/**
* <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(@IdRes 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(@IdRes int id) {
mCheckedId = id;
if (mOnCheckedChangeListener != null) {
mOnCheckedChangeListener.onCheckedChanged(this, mCheckedId);
}
}

private void setCheckedStateForView(int viewId, boolean checked) {
View checkedView = findViewById(viewId);
if (checkedView != null && checkedView instanceof MRadioButton) {
((MRadioButton) 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()
*/
@IdRes
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>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}
*/
@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1)
public void onChildViewAdded(View parent, View child) {
if (parent == MRadioGroup.this && child instanceof MRadioButton) {
int id = child.getId();
// generates an id if it's missing
if (id == View.NO_ID) {
id = View.generateViewId();
child.setId(id);
}
((MRadioButton) child).setOnCheckedChangeWidgetListener(
mChildOnCheckedChangeListener);
}

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

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

public int getInternalR(String v1, String v2) {
int titleStyle = 0;
try {
Class clasz = Class.forName("com.android.internal.R$" + v1);//styleable
Field field = clasz.getDeclaredField(v2);
field.setAccessible(true);
titleStyle = (Integer) field.get(null);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
Log.w("MINE", "getInternalR:" + titleStyle);
return titleStyle;
}

public int[] getInternalRS(String v1, String v2) {
int[] textAppearanceStyleArr = new int[0];
try {
Class clasz = Class.forName("com.android.internal.R$" + v1);//styleable
Field field = clasz.getDeclaredField(v2);
field.setAccessible(true);
textAppearanceStyleArr = (int[]) field.get(null);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
Log.w("MINE", "getInternalRS:" + textAppearanceStyleArr);
return textAppearanceStyleArr;
}
}

/**
* 说明
* <p>
* android:layout_column="1" 第几行
* android:layout_row="0"    第几列
* android:checked="true"    是否选中
*
* 图片资源里面设置的是state_selected属性不是state_checked
*/

/**
* @author hp
* @ClassName MRadioButton
* @Description:
* @date 2018/1/5 0005
*/
public class MRadioButton extends FrameLayout implements Checkable {
private boolean mChecked;
private OnCheckedChangeListener mOnCheckedChangeListener;
private OnCheckedChangeListener mOnCheckedChangeWidgetListener;

public MRadioButton(Context context) {
this(context, null);
}

public MRadioButton(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}

public MRadioButton(Context context, AttributeSet attrs, int defStyleAttr) {
this(context, attrs, defStyleAttr, 0);
}

public MRadioButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr);
defStyleAttr = getInternalR("attr", "radioButtonStyle");
final TypedArray a = context.obtainStyledAttributes(
attrs, getInternalRS("styleable", "CompoundButton"), defStyleAttr, defStyleRes);
if (a.hasValue(getInternalR("styleable", "CompoundButton_checked"))) {
final boolean checked = a.getBoolean(getInternalR("styleable", "CompoundButton_checked"), false);
setChecked(checked);
}
}

@Override
public boolean onTouchEvent(MotionEvent event) {
Log.w("MINE", "MotionEvent:" + event);
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
performClick();
break;
}
return super.onTouchEvent(event);
}

/**
* Register a callback to be invoked when the checked state of this button
* changes.
*
* @param listener the callback to call on checked state change
*/
public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {
mOnCheckedChangeListener = listener;
}

/**
* Register a callback to be invoked when the checked state of this button
* changes. This callback is used for internal purpose only.
*
* @param listener the callback to call on checked state change
* @hide
*/
void setOnCheckedChangeWidgetListener(OnCheckedChangeListener listener) {
mOnCheckedChangeWidgetListener = listener;
}

@Override
public void setChecked(boolean checked) {
Log.e("MINE", "setChecked:" + checked);
if (mChecked != checked) {
mChecked = checked;
setSelected(checked);
refreshDrawableState();
if (mOnCheckedChangeListener != null) {
mOnCheckedChangeListener.onCheckedChanged(this, mChecked);
}
if (mOnCheckedChangeWidgetListener != null) {
mOnCheckedChangeWidgetListener.onCheckedChanged(this, mChecked);
}
}
}

/**
* {@inheritDoc}
*/
@Override
protected void onFinishInflate() {
super.onFinishInflate();
setSelected(mChecked);
}

@Override
public void setSelected(boolean selected) {
super.setSelected(selected);
for (int i = 0; i < getChildCount(); i++) {
View v = getChildAt(i);
v.setSelected(selected);
}
}

public int getInternalR(String v1, String v2) {
int titleStyle = 0;
try {
Class clasz = Class.forName("com.android.internal.R$" + v1);//styleable
Field field = clasz.getDeclaredField(v2);
field.setAccessible(true);
titleStyle = (Integer) field.get(null);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
Log.w("MINE", "getInternalR:" + titleStyle);
return titleStyle;
}

public int[] getInternalRS(String v1, String v2) {
int[] textAppearanceStyleArr = new int[0];
try {
Class clasz = Class.forName("com.android.internal.R$" + v1);//styleable
Field field = clasz.getDeclaredField(v2);
field.setAccessible(true);
textAppearanceStyleArr = (int[]) field.get(null);
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
Log.w("MINE", "getInternalRS:" + textAppearanceStyleArr);
return textAppearanceStyleArr;
}

/**
* Interface definition for a callback to be invoked when the checked state
* of a compound button changed.
*/
public static interface OnCheckedChangeListener {
/**
* Called when the checked state of a compound button has changed.
*
* @param buttonView The compound button view whose state has changed.
* @param isChecked  The new checked state of buttonView.
*/
void onCheckedChanged(View buttonView, boolean isChecked);
}

@Override
public boolean isChecked() {
return mChecked;
}

@Override
public boolean performClick() {
toggle();

final boolean handled = super.performClick();
if (!handled) {
// View only makes a sound effect if the onClickListener was
// called, so we'll need to make one here instead.
playSoundEffect(SoundEffectConstants.CLICK);
}

return handled;
}

@Override
public void toggle() {
if (!isChecked()) {
setChecked(!mChecked);
}
}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="jeremy.myprogresstest.MainActivity">

<jeremy.myprogresstest.MRadioGroup
android:id="@+id/mrg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnCount="3"
android:rowCount="3">

<jeremy.myprogresstest.MRadioButton
android:id="@+id/mrb1"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_column="0"
android:layout_row="0"
android:background="@drawable/ic_admin_remember"
android:checked="true" />

<jeremy.myprogresstest.MRadioButton
android:id="@+id/mrb2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_column="2"
android:layout_row="0"
android:checked="false">

<LinearLayout
android:layout_width="100dp"
android:layout_height="100dp"
android:background="@drawable/color_b2w"
android:orientation="horizontal">

<ImageView
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_gravity="center_vertical"
android:background="@drawable/ic_admin_remember" />

<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:text="你好"
android:textColor="@color/txt_w2b"
android:textSize="18sp" />
</LinearLayout>
</jeremy.myprogresstest.MRadioButton>

<jeremy.myprogresstest.MRadioButton
android:id="@+id/mrb3"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_column="1"
android:layout_row="1"
android:background="@drawable/ic_admin_remember" />

<jeremy.myprogresstest.MRadioButton
android:id="@+id/mrb4"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_column="2"
android:layout_row="2"
android:background="@drawable/ic_admin_remember" />

<jeremy.myprogresstest.MRadioButton
android:id="@+id/mrb5"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_column="0"
android:layout_row="2"
android:background="@drawable/ic_admin_remember" />
</jeremy.myprogresstest.MRadioGroup>
</LinearLayout>