public class CustomViewGroup extends ViewGroup{
 public CustomViewGroup(Context context) {
 this(context,null);
 }

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

 public CustomViewGroup(Context context, AttributeSet attrs, int defStyleAttr) {
 super(context, attrs, defStyleAttr);
 }
}

 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 int childCount = getChildCount();
 for(int i = 0 ; i < childCount ; i ++){
  View children = getChildAt(i);
  measureChild(children,widthMeasureSpec,heightMeasureSpec);
 }
 }

 protected void measureChild(View child, int parentWidthMeasureSpec,
  int parentHeightMeasureSpec) {
 final LayoutParams lp = child.getLayoutParams();

 final int childWidthMeasureSpec = getChildMeasureSpec(parentWidthMeasureSpec,
  mPaddingLeft + mPaddingRight, lp.width);
 final int childHeightMeasureSpec = getChildMeasureSpec(parentHeightMeasureSpec,
  mPaddingTop + mPaddingBottom, lp.height);

 child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
 }

 public static int getChildMeasureSpec(int spec, int padding, int childDimension) {
 int specMode = MeasureSpec.getMode(spec);
 int specSize = MeasureSpec.getSize(spec);

 int size = Math.max(0, specSize - padding);

 int resultSize = 0;
 int resultMode = 0;

 switch (specMode) {
 // Parent has imposed an exact size on us
 case MeasureSpec.EXACTLY:
  if (childDimension >= 0) {
  resultSize = childDimension;
  resultMode = MeasureSpec.EXACTLY;
  } else if (childDimension == LayoutParams.MATCH_PARENT) {
  // Child wants to be our size. So be it.
  resultSize = size;
  resultMode = MeasureSpec.EXACTLY;
  } else if (childDimension == LayoutParams.WRAP_CONTENT) {
  // Child wants to determine its own size. It can't be
  // bigger than us.
  resultSize = size;
  resultMode = MeasureSpec.AT_MOST;
  }
  break;

 // Parent has imposed a maximum size on us
 case MeasureSpec.AT_MOST:
  if (childDimension >= 0) {
  // Child wants a specific size... so be it
  resultSize = childDimension;
  resultMode = MeasureSpec.EXACTLY;
  } else if (childDimension == LayoutParams.MATCH_PARENT) {
  // Child wants to be our size, but our size is not fixed.
  // Constrain child to not be bigger than us.
  resultSize = size;
  resultMode = MeasureSpec.AT_MOST;
  } else if (childDimension == LayoutParams.WRAP_CONTENT) {
  // Child wants to determine its own size. It can't be
  // bigger than us.
  resultSize = size;
  resultMode = MeasureSpec.AT_MOST;
  }
  break;

 // Parent asked to see how big we want to be
 case MeasureSpec.UNSPECIFIED:
  if (childDimension >= 0) {
  // Child wants a specific size... let him have it
  resultSize = childDimension;
  resultMode = MeasureSpec.EXACTLY;
  } else if (childDimension == LayoutParams.MATCH_PARENT) {
  // Child wants to be our size... find out how big it should
  // be
  resultSize = View.sUseZeroUnspecifiedMeasureSpec ? 0 : size;
  resultMode = MeasureSpec.UNSPECIFIED;
  } else if (childDimension == LayoutParams.WRAP_CONTENT) {
  // Child wants to determine its own size.... find out how
  // big it should be
  resultSize = View.sUseZeroUnspecifiedMeasureSpec ? 0 : size;
  resultMode = MeasureSpec.UNSPECIFIED;
  }
  break;
 }
 return MeasureSpec.makeMeasureSpec(resultSize, resultMode);
 }

@Override
 protected void onLayout(boolean changed, int l, int t, int r, int b) {
 int childCount = getChildCount();
 int preHeight = 0;
 for(int i = 0 ; i < childCount ; i ++){
  View children = getChildAt(i);
  int cHeight = children.getMeasuredHeight();
  if(children.getVisibility() != View.GONE){
  children.layout(l, preHeight, r,preHeight += cHeight);
  }
 }
 }

public void layout(int l, int t, int r, int b) {
 if ((mPrivateFlags3 & PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT) != 0) {
  onMeasure(mOldWidthMeasureSpec, mOldHeightMeasureSpec);
  mPrivateFlags3 &= ~PFLAG3_MEASURE_NEEDED_BEFORE_LAYOUT;
 }

 int oldL = mLeft;
 int oldT = mTop;
 int oldB = mBottom;
 int oldR = mRight;

 boolean changed = isLayoutModeOptical(mParent) ?
  setOpticalFrame(l, t, r, b) : setFrame(l, t, r, b);

 if (changed || (mPrivateFlags & PFLAG_LAYOUT_REQUIRED) == PFLAG_LAYOUT_REQUIRED) {
  onLayout(changed, l, t, r, b);
  mPrivateFlags &= ~PFLAG_LAYOUT_REQUIRED;

  ListenerInfo li = mListenerInfo;
  if (li != null && li.mOnLayoutChangeListeners != null) {
  ArrayList<OnLayoutChangeListener> listenersCopy =
   (ArrayList<OnLayoutChangeListener>)li.mOnLayoutChangeListeners.clone();
  int numListeners = listenersCopy.size();
  for (int i = 0; i < numListeners; ++i) {
   listenersCopy.get(i).onLayoutChange(this, l, t, r, b, oldL, oldT, oldR, oldB);
  }
  }
 }

 mPrivateFlags &= ~PFLAG_FORCE_LAYOUT;
 mPrivateFlags3 |= PFLAG3_IS_LAID_OUT;
 }

 protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
 }

 View children = getChildAt(i);
 int cHeight = children.getMeasuredHeight();
 if(children.getVisibility() != View.GONE){
 children.layout(l, preHeight, r,preHeight += cHeight);

<?xml version="1.0" encoding="utf-8"?>
<com.sanhuimusic.mycustomview.view.CustomViewGroup
 android:background="#999999"
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:custom="http://schemas.android.com/apk/res-auto"
 android:id="@+id/customViewGroup"
 android:layout_width="match_parent"
 android:layout_height="match_parent">
 <com.sanhuimusic.mycustomview.view.CompositeViews
 android:background="#999999"
 android:id="@+id/topBar"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 custom:titleText="@string/titleText"
 custom:titleColor="#000000"
 custom:titleTextSize="@dimen/titleTextSize"
 custom:titleBackground="#999999"
 custom:leftText="@string/leftText"
 custom:leftTextColor="#FFFFFF"
 custom:leftBackground="#666666"
 custom:leftTextSize="@dimen/leftTextSize"
 custom:rightText="@string/rightText"
 custom:rightTextColor="#FFFFFF"
 custom:rightBackground="#666666"
 custom:rightTextSize="@dimen/rightTextSize"
 />
 <com.sanhuimusic.mycustomview.view.AudioBar
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 />
</com.sanhuimusic.mycustomview.view.CustomViewGroup>

public class MainActivity extends AppCompatActivity {
 private CompositeViews topBar;
 private Context mContext;
 private CustomViewGroup mViewGroupContainer;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.custom_viewgroup);
 mContext = this;
 init();
 }

 private void init() {
 mViewGroupContainer = (CustomViewGroup) findViewById(R.id.customViewGroup);
 topBar = (CompositeViews)findViewById(R.id.topBar);
 topBar.setOnTopBarClickListener(new CompositeViews.TopBarClickListener(){
  @Override
  public void leftClickListener() {
  ToastUtil.makeText(MainActivity.this,"您点击了返回键",Toast.LENGTH_SHORT).show();
  }
  @Override
  public void rightClickListener() {
  ToastUtil.makeText(MainActivity.this,"您点击了搜索键",Toast.LENGTH_SHORT).show();
  }
 });
 }
}

@Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
 super.onMeasure(widthMeasureSpec, heightMeasureSpec);
 int childCount = getChildCount();
 for(int i = 0 ; i < childCount ; i ++){
  View children = getChildAt(i);
  measureChild(children,widthMeasureSpec,heightMeasureSpec);
 }

 /**
  * 让它支持自身wrap_content
  */
 int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);
 int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);
 int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);
 int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);
 int mWidth = 0;
 int mHeight = 0;
 int mMaxWidth = 0;
 if(widthSpecMode == MeasureSpec.AT_MOST && heightSpecMode == MeasureSpec.AT_MOST){
  for(int i = 0 ; i < childCount ; i ++){
  View children = getChildAt(i);
  mWidth += children.getMeasuredWidth();
  mHeight += children.getMeasuredHeight();
  }
  setMeasuredDimension(mWidth, mHeight);
 } else if(widthSpecMode == MeasureSpec.AT_MOST){
  for(int i = 0 ; i < childCount ; i ++){
  View children = getChildAt(i);
  mMaxWidth = Math.max(mMaxWidth,children.getMeasuredWidth());
  }
  setMeasuredDimension(mMaxWidth,heightSpecSize);
 } else if(heightSpecMode == MeasureSpec.AT_MOST){
  for(int i = 0 ; i < childCount ; i ++){
  View children = getChildAt(i);
  mHeight += children.getMeasuredHeight();
  }
  setMeasuredDimension(widthSpecSize,mHeight);
 }
 }

leftPadding = getPaddingLeft();
topPadding = getPaddingTop();
rightPadding = getPaddingRight();
bottomPadding = getPaddingBottom();

if(widthSpecMode == MeasureSpec.AT_MOST && heightSpecMode == MeasureSpec.AT_MOST){
  for(int i = 0 ; i < childCount ; i ++){
  View children = getChildAt(i);
  mWidth += children.getMeasuredWidth();
  mHeight += children.getMeasuredHeight();
  }
  setMeasuredDimension(mWidth + leftPadding + rightPadding, mHeight 
  + topPadding + bottomPadding);
 } else if(widthSpecMode == MeasureSpec.AT_MOST){
  for(int i = 0 ; i < childCount ; i ++){
  View children = getChildAt(i);
  mMaxWidth = Math.max(mMaxWidth,children.getMeasuredWidth());
  }
  setMeasuredDimension(mMaxWidth + leftPadding + rightPadding, heightSpecSize + topPadding + bottomPadding);
 } else if(heightSpecMode == MeasureSpec.AT_MOST){
  for(int i = 0 ; i < childCount ; i ++){
  View children = getChildAt(i);
  mHeight += children.getMeasuredHeight();
  }
  setMeasuredDimension(widthSpecSize + leftPadding + rightPadding, mHeight + topPadding + bottomPadding);
 }

@Override
 protected void onLayout(boolean changed, int l, int t, int r, int b) {
 int childCount = getChildCount();
 int preHeight = topPadding;
 for(int i = 0 ; i < childCount ; i ++){
  View children = getChildAt(i);
  int cHeight = children.getMeasuredHeight();
  if(children.getVisibility() != View.GONE){
  children.layout(l + leftPadding, preHeight, r + rightPadding, preHeight += cHeight);
  }
 }
 }