带有嵌套线性布局的Android radiogroup不取消选择单选按钮

Question

我在一个radiogroup中有一组radiobuttons，它拒绝按照我想要的方式行事。单选按钮需要两行两行，一行一行，最后一个按钮具有edittext而不是标签。布局看起来是正确的，但是单选按钮允许选择多个布局，并且不会取消任何选择。 下面是我的XML：

<RadioGroup 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:id="@+id/rgDesignation"> 

    <LinearLayout 
     android:orientation="horizontal" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/llVT1"> 

     <RadioButton 
      android:text="@string/pressure_equipment" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:id="@+id/rbPE" 
      android:layout_weight="1" /> 

     <RadioButton 
      android:text="@string/assemblies" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:id="@+id/rbAss" 
      android:layout_weight="1" /> 
    </LinearLayout> 

    <LinearLayout 
     android:orientation="horizontal" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:id="@+id/llVT2"> 

     <RadioButton 
      android:text="@string/unheated" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:id="@+id/rbUnh" 
      android:layout_weight="1" /> 

     <RadioButton 
      android:text="@string/heated" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:id="@+id/rbH" 
      android:layout_weight="1" /> 

    </LinearLayout> 

    <LinearLayout 
     android:orientation="horizontal" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:layout_weight="1" 
     android:id="@+id/llVT3"> 

     <RadioButton 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:id="@+id/rbOwnSel" 
      android:layout_weight="0" /> 

     <EditText 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:inputType="text" 
      android:ems="10" 
      android:id="@+id/etOwnChoice" 
      android:layout_weight="1" 
      android:textColor="@android:color/black" 
      android:background="@android:color/white" 
      android:elevation="5dp" /> 
    </LinearLayout> 

    </RadioGroup> 

Answer 1

进行自定义RadioGroup中类是这样的：

public class RadioGroup extends LinearLayout { 

private int mCheckedId = -1; 

private CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener; 

private boolean mProtectFromCheckedChange = false; 
private OnCheckedChangeListener mOnCheckedChangeListener; 
private PassThroughHierarchyChangeListener mPassThroughListener; 


public RadioGroup(Context context) { 
    super(context); 
    setOrientation(VERTICAL); 
    init(); 
} 


public RadioGroup(Context context, AttributeSet attrs) { 
    super(context, attrs); 
    init(); 
} 

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


@Override 
public void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) { 

    mPassThroughListener.mOnHierarchyChangeListener = listener; 
} 

@Override 
protected void onFinishInflate() { 
    super.onFinishInflate(); 


    if (mCheckedId != -1) { 
     mProtectFromCheckedChange = true; 
     setCheckedStateForView(mCheckedId, true); 
     mProtectFromCheckedChange = false; 
     setCheckedId(mCheckedId); 
    } 
} 

@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); 
} 


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 RadioButton) { 
     ((RadioButton) checkedView).setChecked(checked); 
    } 
} 


@IdRes 
public int getCheckedRadioButtonId() { 
    return mCheckedId; 
} 


public void clearCheck() { 
    check(-1); 
} 


public void setOnCheckedChangeListener(OnCheckedChangeListener listener) { 
    mOnCheckedChangeListener = listener; 
} 


@Override 
public LayoutParams generateLayoutParams(AttributeSet attrs) { 
    return new LayoutParams(getContext(), attrs); 
} 

@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 CharSequence getAccessibilityClassName() { 
    return RadioGroup.class.getName(); 
} 


public static class LayoutParams extends LinearLayout.LayoutParams { 

    public LayoutParams(Context c, AttributeSet attrs) { 
     super(c, attrs); 
    } 


    public LayoutParams(int w, int h) { 
     super(w, h); 
    } 


    public LayoutParams(int w, int h, float initWeight) { 
     super(w, h, initWeight); 
    } 


    public LayoutParams(ViewGroup.LayoutParams p) { 
     super(p); 
    } 


    public LayoutParams(MarginLayoutParams source) { 
     super(source); 
    } 


    @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; 
     } 
    } 
} 


    public void onCheckedChanged(RadioGroup group, @IdRes 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); 
    } 
} 


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

    @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1) 
    public void traverseTree(View view) { 
     if (view instanceof RadioButton) { 
      int id = view.getId(); 
      // generates an id if it's missing 
      if (id == View.NO_ID) { 
       id = View.generateViewId(); 
       view.setId(id); 
      } 
      ((RadioButton) view).setOnCheckedChangeListener(
        mChildOnCheckedChangeListener); 
     } 
     if (!(view instanceof ViewGroup)) { 
      return; 
     } 
     ViewGroup viewGroup = (ViewGroup) view; 
     if (viewGroup.getChildCount() == 0) { 
      return; 
     } 
     for (int i = 0; i < viewGroup.getChildCount(); i++) { 
      traverseTree(viewGroup.getChildAt(i)); 
     } 
    } 

    /** 
    * {@inheritDoc} 
    */ 
    @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN_MR1) 
    public void onChildViewAdded(View parent, View child) { 
     traverseTree(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).setOnCheckedChangeListener(
        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).setOnCheckedChangeListener(null); 
     } 

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

}

这样

，并添加你的布局：

<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:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="vertical" 
android:padding="@dimen/activity_vertical_margin" 
> 

<com.example.admin.myapplication.RadioGroup 
    android:id="@+id/radio_group_plus" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:orientation="vertical"> 

    <RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="60dp"> 

     <RadioButton 
      android:id="@+id/rb_latte" 
      android:text="radio1" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentLeft="true" 
      android:layout_centerVertical="true" /> 

     <RadioButton 
      android:text="radio2" 
      android:id="@+id/rb_latte1" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentRight="true" 
      android:layout_centerVertical="true" /> 
    </RelativeLayout> 

    <View 
     android:layout_width="match_parent" 
     android:layout_height="2dp" 
     android:background="#E0E0E0" /> 

    <RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="60dp"> 

     <ImageView 
      android:id="@+id/iv_mocha" 
      android:layout_width="40dp" 
      android:layout_height="wrap_content" 
      android:layout_alignParentLeft="true" 
      android:src="@mipmap/ic_launcher" /> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_centerVertical="true" 
      android:layout_toRightOf="@+id/iv_mocha" 
      android:paddingLeft="20dp" 
      android:text="Mocha" /> 

     <RadioButton 
      android:id="@+id/rb_mocha" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentRight="true" 
      android:layout_centerVertical="true" /> 
    </RelativeLayout> 

    <View 
     android:layout_width="match_parent" 
     android:layout_height="2dp" 
     android:background="#E0E0E0" /> 

    <RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="60dp"> 

     <ImageView 
      android:id="@+id/iv_americano" 
      android:layout_width="40dp" 
      android:layout_height="wrap_content" 
      android:layout_alignParentLeft="true" 
      android:src="@mipmap/ic_launcher" /> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_centerVertical="true" 
      android:layout_toRightOf="@+id/iv_americano" 
      android:paddingLeft="20dp" 
      android:text="Americano" /> 

     <RadioButton 
      android:id="@+id/rb_americano" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentRight="true" 
      android:layout_centerVertical="true" /> 
    </RelativeLayout> 

    <View 
     android:layout_width="match_parent" 
     android:layout_height="2dp" 
     android:background="#E0E0E0" /> 

    <RelativeLayout 
     android:layout_width="match_parent" 
     android:layout_height="60dp"> 

     <ImageView 
      android:id="@+id/iv_espresso" 
      android:layout_width="40dp" 
      android:layout_height="wrap_content" 
      android:layout_alignParentLeft="true" 
      android:src="@mipmap/ic_launcher" /> 

     <TextView 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_centerVertical="true" 
      android:layout_toRightOf="@+id/iv_espresso" 
      android:paddingLeft="20dp" 
      android:text="Espresso" /> 

     <RadioButton 
      android:id="@+id/rb_espresso" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:layout_alignParentRight="true" 
      android:layout_centerVertical="true" /> 
    </RelativeLayout> 

    <View 
     android:layout_width="match_parent" 
     android:layout_height="2dp" 
     android:background="#E0E0E0" /> 

    <LinearLayout 
     android:layout_width="match_parent" 
     android:layout_height="60dp" 
     android:orientation="horizontal"> 

     <RelativeLayout 
      android:layout_width="0dp" 
      android:layout_height="60dp" 
      android:layout_weight="1"> 

      <ImageView 
       android:id="@+id/iv_orange" 
       android:layout_width="40dp" 
       android:layout_height="wrap_content" 
       android:layout_alignParentLeft="true" 
       android:src="@mipmap/ic_launcher" /> 

      <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_centerVertical="true" 
       android:layout_toRightOf="@+id/iv_orange" 
       android:paddingLeft="20dp" 
       android:text="Orange" /> 

      <RadioButton 
       android:id="@+id/rb_orange" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_alignParentRight="true" 
       android:layout_centerVertical="true" /> 
     </RelativeLayout> 

     <View 
      android:layout_width="2dp" 
      android:layout_height="wrap_content" 
      android:layout_marginBottom="10dp" 
      android:layout_marginTop="10dp" 
      android:background="#E0E0E0" /> 

     <RelativeLayout 
      android:layout_width="0dp" 
      android:layout_height="60dp" 
      android:layout_weight="1" 
      android:paddingLeft="10dp"> 

      <ImageView 
       android:id="@+id/iv_butter" 
       android:layout_width="40dp" 
       android:layout_height="wrap_content" 
       android:layout_alignParentLeft="true" 
       android:src="@mipmap/ic_launcher" /> 

      <TextView 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_centerVertical="true" 
       android:layout_toRightOf="@+id/iv_butter" 
       android:paddingLeft="20dp" 
       android:text="Butter" /> 

      <RadioButton 
       android:id="@+id/rb_butter" 
       android:layout_width="wrap_content" 
       android:layout_height="wrap_content" 
       android:layout_alignParentRight="true" 
       android:layout_centerVertical="true" /> 
     </RelativeLayout> 
    </LinearLayout> 

</com.example.admin.myapplication.RadioGroup> 

<Button 
    android:layout_width="wrap_content" 
    android:layout_height="48dp" 
    android:layout_gravity="center" 
    android:layout_marginTop="20dp" 
    android:background="#138BE8" 
    android:gravity="center" 
    android:onClick="onOrderClicked" 
    android:paddingLeft="20dp" 
    android:paddingRight="20dp" 
    android:text="Order Drink" 
    android:textColor="@android:color/white" />