Android中的视图之间的间距不起作用

Question

我正在尝试在运行时创建视图，我想让主布局视图为空白，然后在运行时添加一个虚线框视图（组视图），然后在该视图中添加其他视图（项目视图）。我有这个工作，但我目前正在使用两个组视图进行测试，但是当它们被添加时，它们会相继添加，并且虚线视图之间没有间距。我真的不明白为什么会这样，因为我已经尝试了每个边距和填充的组合来尝试这样做，但没有任何作用。请有人帮我这个。提前谢谢。

以下是我的组布局视图代码：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="@drawable/group_box"
    android:layout_marginBottom="@dimen/activity_vertical_margin"
    android:id="@+id/pvGroupContainerLayout" >

<TextView
    android:id="@+id/groupBoxTextView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:paddingLeft="8dp"
    android:paddingTop="4dp"
    android:paddingBottom="@dimen/activity_vertical_margin" />

</LinearLayout>

以下是添加视图的代码：

public void createView()
{
    deviceInfoContainer = new DeviceInfoContainer(activity);
    TextView deviceInfoTextView1 = deviceInfoContainer.getDeviceInfoTextView1();
    TextView deviceInfoTextView2 = deviceInfoContainer.getDeviceInfoTextView2();
    TextView deviceInfoTextView3 = deviceInfoContainer.getDeviceInfoTextView3();
    View deviceInfoView = deviceInfoContainer.getDeviceInfoView();

    deviceInfoTextView1.setText(deviceInfo.getDeviceTypeName());
    deviceInfoTextView2.setText(String.valueOf(deviceInfo.getDeviceTypeCode()));
    deviceInfoTextView3.setText(String.valueOf(deviceInfo.getSensorTypeObject()));

    pvContainerLayout.addView(deviceInfoView);

    System.out.println("Page test: " + page.getAttributeName());
    ArrayList<Group> groups = page.returnGroups();
    System.out.println("Groups test: " + groups.size());

    for(Group g : groups)
    {
        groupContainer = new PVGroupContainer(activity);
        groupContainerList.add(groupContainer);
        TextView groupTextView = groupContainer.getGroupTextView();
        View groupView = groupContainer.getGroupView();
        groupTextView.setText(g.getAttributeName());
        pvContainerLayout.addView(groupView);

        for(Item i : g.returnItems())
        {
            DataObject dataObject = i.getDataObject();

            if(dataObject.getClass().equals(StringDataObject.class))
            {
                StringDataObject stringDataObject = (StringDataObject) dataObject;

                itemContainer = new PVItemContainer(activity); // Declares new object in the array list
                itemContainerList.add(itemContainer);

                TextView progressBarTextView1 = itemContainer.getProgressBarTextView1();
                TextView progressBarTextView2 = itemContainer.getProgressBarTextView2();
                ProgressBar progressBarProgressBar1 = itemContainer.getProgressBarProgressBar1();
                View progressBarView = itemContainer.getProgressBarView();
                ImageButton progressBarImageButton1 = itemContainer.getProgressBarImageButton1();

                progressBarTextView1.setText(i.getAttributeName());
                progressBarTextView2.setText(stringDataObject.getValue());
                progressBarProgressBar1.setProgress(0); //TODO: String will be "" which is invalid. May need to change the view.
                ((ViewGroup) groupView).addView(progressBarView); // Adds the view to the current layout
                progressBarView.setOnLongClickListener(new OnLongClickListener() 
                {
                    @Override
                    public boolean onLongClick(View v) {
                        Vibrator vibrator = (Vibrator)activity.getSystemService(Context.VIBRATOR_SERVICE);
                        vibrator.vibrate(1500);
                        popupFirmware.createDialog();
                        return true;
                    }   
                });

                progressBarImageButton1.setOnClickListener(new OnClickListener() 
                {
                    @Override
                    public void onClick(View v) {
                        Fragment fragment = new Fragment_3();
                        FragmentTransaction transaction = ((FragmentActivity) activity).getSupportFragmentManager().beginTransaction();
                        transaction.replace(R.layout.fragment_diag, fragment);
                        transaction.addToBackStack(null);
                        transaction.commit();
                    }
                });
            }
       }
}