图库图片是从Android图库中心启动

在我的XML file.In画廊看到下面我有两个按钮间画廊，图像从中心加入。

I am having gallery in between two buttons as seen below in my xml file.In Gallery, images are adding from the center.

<RelativeLayout
      android:layout_height="80dp"
      android:layout_width="fill_parent"
      android:id="@+id/gal"
      android:layout_alignParentBottom="true"
      android:background="@drawable/backgroundblackwhite">
       <Button android:layout_height="wrap_content"
           android:layout_width="wrap_content"
           android:background="@drawable/backward"
           android:layout_alignParentLeft="true"/>
       <Button android:layout_height="wrap_content"
           android:layout_width="wrap_content"
           android:background="@drawable/forward"
           android:layout_alignParentRight="true"/>
      <Gallery 
          android:layout_height="100dp"
          android:layout_width="fill_parent"
          android:layout_alignParentBottom="true"
          android:id="@+id/gallary"
          android:layout_marginLeft="100dp"
          android:layout_marginRight="100dp"
          android:spacing="5dp"
          android:layout_marginBottom="10dp"
          android:background="@drawable/greypattren"/>  
   </RelativeLayout>

I want the images to start from Left of my Gallery.I used the below code to set the gallery images start from left of gallery view.

DisplayMetrics指标=新DisplayMetrics（）;
                。getWindowManager（）getDefaultDisplay（）getMetrics（指标）;

DisplayMetrics metrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(metrics);

            Gallery g = (Gallery) findViewById(R.id.gallery);

            // set gallery to left side
            MarginLayoutParams mlp = (MarginLayoutParams) g.getLayoutParams();
            mlp.setMargins(-(metrics.widthPixels / 2 + (imageWidth/2)), mlp.topMargin,
                        mlp.rightMargin, mlp.bottomMargin);

不过，我的画廊将最左边即躲在我的左按钮（这是我应该使用滚动图库）

But,my Gallery is going to the extreme left i.e hiding my Button in the left(which I should use for scrolling Gallery)

我张贴两个图像的截图，
1）图库视图，我想，我要的影像，从屏幕左侧的添加。
2）将上述code。使用指标（设置页边距）后，画廊改变。

I am posting the Screenshots of both the images, 1)The Gallery View which I want,and I want the images to add from left of the screen. 2)Changing of Gallery after adding the above code(setting the margins) using metrics.

难道我需要在XML或code改变什么？

Did I need to change anything in xml or code?

请帮忙
在此先感谢

please help Thanks in advance