悬浮窗里的按钮为什么点击没效果

我的悬浮窗加载一个视图 里面有一个按钮 点击这个按钮关闭这个悬浮窗
可是按钮事件 触发不了public class FloatWindowService extends Service {
public static final String TAG="FLOAT_FLAG";
public static final int FlLOAT_SHOW = 1;
public static final int FlLOAT_HIDE = 0;
public  WindowManager windowManager;
public  WindowManager.LayoutParams params;
public  View y_floatView;
public boolean isAdded = false; 
public ImageView imgClose;
@Override
public IBinder onBind(Intent intent) {
return null;
} @Override
public void onCreate() {
super.onCreate();
createFloatView();
} @Override
public void onDestroy() {
super.onDestroy();
windowManager.removeView(y_floatView);  
}
@Override
 public boolean onUnbind(Intent intent) {
  // TODO Auto-generated method stub
  return super.onUnbind(intent);
 }
@Override
public int onStartCommand(Intent intent, int flags, int startId) 
{
int operation = intent.getIntExtra("xfc", FlLOAT_SHOW);
Log.i(TAG, String.valueOf(operation));
switch(operation) {
case 1:
if(!isAdded)
{ windowManager.addView(y_floatView, params);
isAdded=true;
}
break;
case 0:
if(isAdded)
{
windowManager.removeView(y_floatView);
isAdded=false;
}  
break;
}
Log.i(TAG, String.valueOf(isAdded));
return super.onStartCommand(intent, flags, startId);
}

private void createFloatView() 
{
y_floatView =  LayoutInflater.from(this).inflate(R.layout.floatview, null);  
imgClose=(ImageView)y_floatView.findViewById(R.id.ImageViewClose);
windowManager = (WindowManager) this.getSystemService(WINDOW_SERVICE);  
        params = new WindowManager.LayoutParams();
        params.type = WindowManager.LayoutParams.TYPE_SYSTEM_ALERT ;
        params.format = PixelFormat.RGBX_8888;
        params.flags = WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE;
  
        params.width = 330;
        params.height = 300;
        params.gravity = Gravity.LEFT | Gravity.TOP;  
        y_floatView.setOnTouchListener(new View.OnTouchListener() 
        {
         int lastX, lastY;
         int paramX, paramY;
         @Override
public boolean onTouch(View v, MotionEvent event)
{
switch(event.getAction()) {
case MotionEvent.ACTION_DOWN:
lastX = (int) event.getRawX();
lastY = (int) event.getRawY();
paramX = params.x;
paramY = params.y;
break;
case MotionEvent.ACTION_MOVE:
int dx = (int) event.getRawX() - lastX;
int dy = (int) event.getRawY() - lastY;
params.x = paramX + dx;
params.y = paramY + dy;
windowManager.updateViewLayout(y_floatView, params);
break;
}
return true;
}
});
        imgClose.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View v)
{
Log.i("我被点击了","我被点击了");
}
});
}
}
视图布局文件floatview.xml<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/floatback"
    android:orientation="vertical" >
    <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">
    <ImageView 
       android:id="@+id/ImageViewBar"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
        android:src="@drawable/floatbar" />
 <ImageView 
       android:id="@+id/ImageViewClose"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" 
        android:src="@drawable/floatclose" />
</LinearLayout>
</LinearLayout>请教一下 这个问题怎么办呢？？？？？？