Android-Radiogruppe mit verschachtelten Linearlayouts, die Radiobuttons nicht deaktivieren

Question

Ich habe eine Gruppe Radiobuttons in einer Radiogruppe, die sich weigert, sich so zu verhalten, wie ich es möchte. Die Radiobuttons müssen zwei Zeilen von zwei und eine Zeile von eins sein, wobei der letzte Knopf einen Editiertext anstelle eines Etiketts hat. Das Layout sieht korrekt aus, aber die Radiobuttons erlauben mehr als eins ausgewählt zu sein und werden keines davon abwählen. Unten ist mein 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

machen Sie kundenspezifische Radiogroup Klasse wie folgt:

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); 
     } 
    } 
} 

}

und in Ihrem Layout wie folgt hinzu:

<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" />