关于与SurfaceView重叠的控件的点击事件处理

先描述背景：新手，纯的。
问题：我在SurfaceView上层放了一个linearlayout，SurfaceView作为底层的控件，用于绘图，linearlayout中有几个button,用于选择画笔的颜色，现在完成了3指点击显示或隐藏linearlayout。但是现在发现上面的按钮没法用。我觉得是没有拦截到点击事件，因为我在surfaceview中onTouchEvent（）方法中直接return true了，也就没法传递下去。但是，如果是返回false让事件传递下去的话这个surfaceView中又不能绘图了。想要达到的效果就是在linearlayout显示出来后，点按钮可以选择颜色，而且不影响原来的绘图功能。
....额，不知道有没有表达清楚，望指教。
下面贴代码
布局文件（不知道怎么去实现控件重叠，直接就上framelayout了）：

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:msurface="http://schemas.android.com/apk/res/com.example.testdraw"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent" >



    <FrameLayout

        android:layout_width="fill_parent"

        android:layout_height="fill_parent" >



        <com.example.testdraw.MySurfaceView

            android:id="@+id/msurfaceview"

            android:layout_width="fill_parent"

            android:layout_height="fill_parent"

            msurface:paintColor="#1C86EE" >

        </com.example.testdraw.MySurfaceView>

    </FrameLayout>



    <LinearLayout

        android:id="@+id/layout_top"

        android:layout_width="fill_parent"

        android:layout_height="50dp"

        android:background="@drawable/pchoose_bac"

        android:visibility="gone" >



        <Button

            android:id="@+id/btnred"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:background="@drawable/pred" />

        <Button

            android:id="@+id/btnyell"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:background="@drawable/pyell" />

        <Button

            android:id="@+id/btngreen"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:background="@drawable/pgreen" />

        <Button

            android:id="@+id/btnblue"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:background="@drawable/pblue" />

    </LinearLayout>



</FrameLayout>

public class MainActivity extends Activity {



	private LinearLayout layoutTop;

	private static boolean isVisible = false;

	private Button btnPaintRed;

	private Button btnPaintBlue;

	private Button btnPaintYellow;

	private Button btnPaintGreen;

	private MySurfaceView ms;

	

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);



		requestWindowFeature(Window.FEATURE_NO_TITLE);

		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

				WindowManager.LayoutParams.FLAG_FULLSCREEN);

		

		setContentView(R.layout.activity_main);

		

		btnPaintRed = (Button)findViewById(R.id.btnred);

		btnPaintBlue = (Button)findViewById(R.id.btnred);

		btnPaintYellow = (Button)findViewById(R.id.btnred);

		btnPaintGreen = (Button)findViewById(R.id.btnred);

		

		ms = (MySurfaceView)findViewById(R.id.msurfaceview);

		

		

		btnPaintRed.setOnClickListener(new View.OnClickListener() {



			@Override

			public void onClick(View v) {

				ms.paintColor = Color.parseColor("#FF3366");

			}

		});



		...

	}

	

	@Override

	public boolean onTouchEvent(MotionEvent event) {



		int pCount = event.getPointerCount();

		if (pCount == 3) {

			layoutTop = (LinearLayout) findViewById(R.id.layout_top);

			

			switch (event.getAction() & MotionEvent.ACTION_MASK) {

			case MotionEvent.ACTION_POINTER_UP:

				if (isVisible == true) {

					layoutTop.setVisibility(View.GONE);

					isVisible = false;

				} else {

					layoutTop.setVisibility(View.VISIBLE);

					isVisible = true;

				}

				break;

			}

		}

		return true;

	}

}

public class MySurfaceView extends SurfaceView implements Callback, Runnable {



	public static final int TIME_IN_FRAME = 50;

	public int paintColor;



	Paint mPaint = null;

	Paint mTextPaint = null;

	SurfaceHolder mSurfaceHolder = null;



	boolean mRunning = false;

	Canvas mCanvas = null;

	private Path mPath;

	private float mPosX, mPosY;

	

	public MySurfaceView(Context context, AttributeSet attrs) {

		super(context, attrs);

		this.setFocusable(true);

		this.setFocusableInTouchMode(true);

		mSurfaceHolder = this.getHolder();

		mSurfaceHolder.addCallback(this);	

		mCanvas = new Canvas();

		

		/* 获取参数 */

		TypedArray tay = context.obtainStyledAttributes(attrs, R.styleable.MySurfaceView );

		paintColor = tay.getColor(R.styleable.MySurfaceView_paintColor, 0xFFFFFFFF);



		mPaint = new Paint();

		//mPaint.setColor(Color.BLUE);

		mPaint.setColor(paintColor);

		mPaint.setAntiAlias(true);

		mPaint.setAlpha(60);

		mPaint.setStyle(Paint.Style.STROKE);

		mPaint.setStrokeCap(Paint.Cap.ROUND);

		mPaint.setStrokeWidth(20);

		mPath = new Path();

		mTextPaint = new Paint();

		mTextPaint.setColor(Color.BLACK);

		mTextPaint.setTextSize(15);

		

		tay.recycle();

	}

        //主要是这里不知道怎么处理，如果return false，绘图直接不显示了。

	@Override

	public boolean onTouchEvent(MotionEvent event) {



		mPaint.setColor(paintColor);

		

		int pCount = event.getPointerCount();

		if (pCount == 3) {

			return false;

		} else {

			int action = event.getAction();

			float x = event.getX();

			float y = event.getY();

			switch (action) {

			case MotionEvent.ACTION_DOWN:

				mPath.moveTo(x, y);

				break;

			case MotionEvent.ACTION_MOVE:

				mPath.quadTo(mPosX, mPosY, x, y);

				break;

			case MotionEvent.ACTION_UP:

				// mPath.reset();

				break;

			}

			// 记录当前触摸点得当前得坐标

			mPosX = x;

			mPosY = y;



			return true;

		}

	}



	private void onDraw() {

		mCanvas.drawColor(Color.WHITE);

		// 绘制曲线

		mCanvas.drawPath(mPath, mPaint);

		mCanvas.drawText("当前触笔X：" + mPosX, 0, 20, mTextPaint);

		mCanvas.drawText("当前触笔Y:" + mPosY, 0, 40, mTextPaint);

	}



	public void run() {

		// TODO Auto-generated method stub

		while (mRunning) {

			long startTime = System.currentTimeMillis();

			synchronized (mSurfaceHolder) {

				mCanvas = mSurfaceHolder.lockCanvas();

				onDraw();

				mSurfaceHolder.unlockCanvasAndPost(mCanvas);

			}

			long endTime = System.currentTimeMillis();

			int diffTime = (int) (endTime - startTime);

			while (diffTime <= TIME_IN_FRAME) {

				diffTime = (int) (System.currentTimeMillis() - startTime);

				Thread.yield();

			}

		}

	}



	@Override

	public void surfaceChanged(SurfaceHolder holder, int format, int width,

			int height) {

		// TODO Auto-generated method stub

	}



	@Override

	public void surfaceCreated(SurfaceHolder holder) {

		mRunning = true;

		new Thread(this).start();

	}



	@Override

	public void surfaceDestroyed(SurfaceHolder holder) {

		// TODO Auto-generated method stub

		mRunning = false;

	}



}