首页 \ 问答 \ 龙目岛懒惰的可变集合的吸气剂(Lombok lazy getter for mutable collections)

龙目岛懒惰的可变集合的吸气剂(Lombok lazy getter for mutable collections)

 我有一个有集合的类： 
 

public class Foo
{
    @Inject
    private BarManager barManager;
    @Getter(lazy = true)
    private final List<Bar> bars = barManager.getAll();

    public void addBar(Bar bar)
    {
        bars.add(bar);
    }
}

 

 但是我不能在List添加/删除元素。 原因是该属性是AtomicReference 。 警告/错误是： 
 

The method add(Employee) is undefined for the type  AtomicReference<AtomicReference<List<Employee>>>

 

 如何在集合上执行添加/删除操作？ 

I have a class which has a collection:
 

public class Foo
{
    @Inject
    private BarManager barManager;
    @Getter(lazy = true)
    private final List<Bar> bars = barManager.getAll();

    public void addBar(Bar bar)
    {
        bars.add(bar);
    }
}

 

However I cannot add/remove elements to/from the List. The cause is that the attribute is an AtomicReference. The warning/error is:
 

The method add(Employee) is undefined for the type  AtomicReference<AtomicReference<List<Employee>>>

 

How can perform add/remove operations on the collection?

原文：https://stackoverflow.com/questions/12160250
更新时间：2023-01-19 18:01

最满意答案

 我通过向ShowCaseView添加子视图解决了这个问题。 
 

 UPD ， 
 

 我被要求分享解决方案，所以我将与我使用的所有代码共享。 
 

 这是我使用ShowCaseView完整代码：我使用Fragment来显示它，因此我不需要每次都复制代码，我也做了一些改进，使生活更轻松： 
 

 frShowCase.java： 
 

/**
 * Created by Movsar Bekaev on 02/09/2015.
 */
public class frShowCase extends Fragment {
    static boolean is_sc_done;
    static ArrayList<xSchowCaseTarget> elements;
    static ShowcaseView sv;

    int svStep = 0;
    RelativeLayout.LayoutParams svButtonParams;
    TextView tvSvTitle, tvSvDetail;
    View additional_view = null;
    Handler mHandler;


    //SHOWCASE THING************************************
    private View.OnClickListener showCaseListener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            sv.hideButton();
            Handler handler = new Handler();
            handler.postDelayed(new Runnable() {
                public void run() {
                    showCaseSwitcher();
                    sv.showButton();
                }
            }, 50);
        }
    };


    public static frShowCase newInstance(ArrayList<xSchowCaseTarget> _elements) {
        frShowCase f = new frShowCase();
        Bundle args = new Bundle();
        elements = new ArrayList<xSchowCaseTarget>();
        sv = null;
        for (xSchowCaseTarget se : _elements) {
            elements.add(se);
        }
        is_sc_done = false;
        f.setArguments(args);
        return f;
    }

    public void svSetButtonPosition(cbActivity.position buttonPortraitPosition) {
        switch (buttonPortraitPosition) {
            case BOTTOM_LEFT:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
                svButtonParams.topMargin = 0;
                break;
            case BOTTOM_RIGHT:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
                svButtonParams.topMargin = 0;
                break;
            case TOP_LEFT:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
                svButtonParams.topMargin = (int) getActivity().getResources().getDimension(R.dimen.btns_heigh);
                break;
            case TOP_RIGHT:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
                svButtonParams.topMargin = (int) getActivity().getResources().getDimension(R.dimen.btns_heigh);
                break;
            case CENTER:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.CENTER_IN_PARENT);
                svButtonParams.topMargin = 0;
                break;
            case FILL_BOTTOM:
                svButtonParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
                svButtonParams.topMargin = 0;
                break;
            case FILL_TOP:
                svButtonParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
                svButtonParams.topMargin = (int) getActivity().getResources().getDimension(R.dimen.btns_heigh);
                break;
            case BOTTOM_CENTER:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
                svButtonParams.topMargin = 0;
                break;
            case CENTER_TOP:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
                svButtonParams.topMargin = (int) getActivity().getResources().getDimension(R.dimen.btns_heigh);
                break;
        }
        sv.setButtonPosition(svButtonParams);
    }

    private void svSetUpOtherView() {
        sv.setContentTitle("");
        sv.setContentText("");
        additional_view = View.inflate(getActivity(), R.layout.showcase_text, null);
        RelativeLayout.LayoutParams lps = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        lps.addRule(RelativeLayout.CENTER_IN_PARENT);
        tvSvTitle = (TextView) additional_view.findViewById(R.id.tvSvTitle);
        tvSvTitle.setText(elements.get(svStep).title);
        tvSvDetail = (TextView) additional_view.findViewById(R.id.tvSvDetailText);
        tvSvDetail.setText(elements.get(svStep).description);
        sv.addView(additional_view, 0, lps);
    }

    private void showCaseSwitcher() {
        if (svStep < elements.size()) {
            if (additional_view != null)
                sv.removeView(additional_view);

            sv.setShowcase(elements.get(svStep).target, true);
            svSetButtonPosition(elements.get(svStep).b_pos);

            if (elements.get(svStep).use_splashscreen) {
                svSetUpOtherView();
            } else {
                sv.setContentTitle(elements.get(svStep).title);
                sv.setContentText(elements.get(svStep).description);
            }

            svStep++;
        } else {
            ViewGroup mRootView = (ViewGroup) getActivity().getWindow().getDecorView().findViewById(android.R.id.content);
            for (View v : getAllChildrenBFS(mRootView)) v.setEnabled(true);

            sv.hide();
            if (elements.get(svStep - 1).title.equals(getString(R.string.sv_intention_addweek_title))) {
                final Message m1 = mHandler.obtainMessage(123);
                mHandler.sendMessage(m1);
            }

            getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_USER);
        }
    }

    public void setHandler(Handler handler) {
        this.mHandler = handler;
    }

    @Override
    public void onAttach(Activity ac) {
        super.onAttach(ac);
        Log.d("123", "onattach");

    }


    private List<View> getAllChildrenBFS(View v) {
        List<View> visited = new ArrayList<View>();
        List<View> unvisited = new ArrayList<View>();
        unvisited.add(v);

        while (!unvisited.isEmpty()) {
            View child = unvisited.remove(0);
            visited.add(child);
            if (!(child instanceof ViewGroup)) continue;
            ViewGroup group = (ViewGroup) child;
            final int childCount = group.getChildCount();
            for (int i=0; i<childCount; i++) unvisited.add(group.getChildAt(i));
        }

        return visited;
    }

    @Override
    public void onCreate(Bundle b) {
        super.onCreate(b);
        Log.d("123", "oncreate");
    }


    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        //SHOWCASE INITIALIZATION THING*************************************************************

        if (!is_sc_done && frShowCase.elements != null) {
            getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
                PowerManager pm = (PowerManager) getActivity().getSystemService(Context.POWER_SERVICE);
                boolean isScreenOn = pm.isScreenOn();
                if (isScreenOn) {
                    is_sc_done = true;

                    ViewGroup mRootView = (ViewGroup) getActivity().getWindow().getDecorView().findViewById(android.R.id.content);
                    for (View v : getAllChildrenBFS(mRootView)) v.setEnabled(false);

                    cbActivity.BoolToPref(getActivity().getLocalClassName(), false);

                    sv = new ShowcaseView.Builder(getActivity())
                            .setTarget(frShowCase.elements.get(0).target)
                            .setContentTitle(frShowCase.elements.get(svStep).title)
                            .setContentText(frShowCase.elements.get(svStep).description)
                            .setStyle(R.style.CustomShowcaseTheme)
                            .setOnClickListener(showCaseListener)
                            .build();

                    if (elements.get(svStep).use_splashscreen)
                        svSetUpOtherView();


                    svSetButtonPosition(frShowCase.elements.get(0).b_pos);
                    sv.setButtonText(getActivity().getString(R.string.next));

                    svStep++;
                }
            }
            return sv;
        }
        //**************************************************************************************
        return container;
    }

}

 

 这是我用于将Targets从Activities传递到该片段的Targets类 
 

 xShowCaseTargets.java 
 

 import com.github.amlcurran.showcaseview.targets.Target;

    /**
     * Created by Movsar Bekaev on 15/09/2015.
     */
    public class xSchowCaseTarget{
        protected cbActivity.position b_pos = cbActivity.position.BOTTOM_RIGHT;
        protected Target target = null;
        protected String title = "";
        protected String description = "";
        protected boolean use_splashscreen = false;

        public xSchowCaseTarget(Target target, String title, String desc, cbActivity.position position, Boolean useSplash) {
            this.b_pos = position;
            this.target = target;
            this.title = title;
            this.description = desc;
            this.use_splashscreen = useSplash;
        }

        public xSchowCaseTarget(Target target, String title, String desc, cbActivity.position position) {
            this.b_pos = position;
            this.target = target;
            this.title = title;
            this.description = desc;
            this.use_splashscreen = false;
        }    
    }

 

 这是ShowCaseView的自定义布局的xml，当默认布局不能完成他的工作时（文本从屏幕上移开，按钮不在那里，等等） 
 

 showcase_text.xml 
 

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <ScrollView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:id="@+id/scvShowCase" >

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/welcome"
                android:id="@+id/tvSvTitle"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="50dp"
                android:textColor="?attr/color_7"
                android:textSize="@dimen/h1_size"
                android:textStyle="bold" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/welcome_text"
                android:id="@+id/tvSvDetailText"
                android:layout_gravity="center_horizontal"
                android:textColor="?attr/color_4"
                android:layout_marginTop="30dp"
                android:layout_marginLeft="5dp"
                android:layout_marginRight="5dp"
                android:textSize="@dimen/text_normal_size"
                android:gravity="center" />
        </LinearLayout>
    </ScrollView>

</FrameLayout>

 

 至于cbActivity.BoolFromPref(getLocalClassName(), false) - 我使用共享偏好来检查这个Activity是否已经启动，所以这行检查这个值，同样在Fragment的代码中你看到在演示时阻止所有布局视图，如果你不需要它 - 不要叫那个。 
 

 如果您需要使用自定义视图，则在创建Target时添加“true”，如下所示： 
 

svElements.add(new xSchowCaseTarget(Target.NONE, getString(R.string.welcome), getString(R.string.welcome_text), position.FILL_BOTTOM, true));

 

 最后一点是，cbActivity - 活动的mybase类，我在这里使用它作为常用方法和变量的引用，所以位置枚举在该类中声明，它看起来像： 
 

 public enum position {TOP_RIGHT, TOP_LEFT, BOTTOM_RIGHT, BOTTOM_LEFT, CENTER, BOTTOM_CENTER, CENTER_TOP, FILL_BOTTOM, FILL_TOP}

 

 以下是我如何从Activities调用ShowcaseView的示例： 
 

 if (cbActivity.BoolFromPref(getLocalClassName(), false)) {
            ArrayList<xSchowCaseTarget> svElements = new ArrayList<xSchowCaseTarget>();
            svElements.add(new xSchowCaseTarget(Target.NONE, getString(R.string.welcome), getString(R.string.welcome_text), position.FILL_BOTTOM, true));
            svElements.add(new xSchowCaseTarget(new ViewTarget(R.id.xxx, ActMain.this), getString(R.string.xxx), getString(R.string.xxx), position.BOTTOM_LEFT));
            svElements.add(new xSchowCaseTarget(new ViewTarget(R.id.xxx, ActMain.this), getString(R.string.xxx), getString(R.xxx), position.BOTTOM_RIGHT));
            if (isThereActionMenuButton())
                svElements.add(new xSchowCaseTarget(new ActionViewTarget(ActMain.this, ActionViewTarget.Type.OVERFLOW), getString(R.string.xxx), getString(R.string.xxx), position.FILL_BOTTOM));
            svElements.add(new xSchowCaseTarget(new ViewTarget(R.id.xxx, ActMain.this), getString(R.string.xxx), getString(R.string.xxx), position.CENTER));

            frShowCase frSC = frShowCase.newInstance(svElements);
            fm.beginTransaction().add(frSC , "xxx").commit();
        }


I solved the problem through adding a child view to ShowCaseView.
 

UPD, 
 

I've been asked to share the solution, so I'll share with all code that I use.
 

Here's my complete code as to using ShowCaseView: I use a Fragment to show it, therefore I don't need to copy code in every time, also I made some improvements to make life easier using it:
 

frShowCase.java:
 

/**
 * Created by Movsar Bekaev on 02/09/2015.
 */
public class frShowCase extends Fragment {
    static boolean is_sc_done;
    static ArrayList<xSchowCaseTarget> elements;
    static ShowcaseView sv;

    int svStep = 0;
    RelativeLayout.LayoutParams svButtonParams;
    TextView tvSvTitle, tvSvDetail;
    View additional_view = null;
    Handler mHandler;


    //SHOWCASE THING************************************
    private View.OnClickListener showCaseListener = new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            sv.hideButton();
            Handler handler = new Handler();
            handler.postDelayed(new Runnable() {
                public void run() {
                    showCaseSwitcher();
                    sv.showButton();
                }
            }, 50);
        }
    };


    public static frShowCase newInstance(ArrayList<xSchowCaseTarget> _elements) {
        frShowCase f = new frShowCase();
        Bundle args = new Bundle();
        elements = new ArrayList<xSchowCaseTarget>();
        sv = null;
        for (xSchowCaseTarget se : _elements) {
            elements.add(se);
        }
        is_sc_done = false;
        f.setArguments(args);
        return f;
    }

    public void svSetButtonPosition(cbActivity.position buttonPortraitPosition) {
        switch (buttonPortraitPosition) {
            case BOTTOM_LEFT:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
                svButtonParams.topMargin = 0;
                break;
            case BOTTOM_RIGHT:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
                svButtonParams.topMargin = 0;
                break;
            case TOP_LEFT:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
                svButtonParams.topMargin = (int) getActivity().getResources().getDimension(R.dimen.btns_heigh);
                break;
            case TOP_RIGHT:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
                svButtonParams.topMargin = (int) getActivity().getResources().getDimension(R.dimen.btns_heigh);
                break;
            case CENTER:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.CENTER_IN_PARENT);
                svButtonParams.topMargin = 0;
                break;
            case FILL_BOTTOM:
                svButtonParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
                svButtonParams.topMargin = 0;
                break;
            case FILL_TOP:
                svButtonParams = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
                svButtonParams.topMargin = (int) getActivity().getResources().getDimension(R.dimen.btns_heigh);
                break;
            case BOTTOM_CENTER:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
                svButtonParams.topMargin = 0;
                break;
            case CENTER_TOP:
                svButtonParams = new RelativeLayout.LayoutParams((int) getActivity().getResources().getDimension(R.dimen.btns_width), (int) getActivity().getResources().getDimension(R.dimen.btns_heigh));
                svButtonParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
                svButtonParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
                svButtonParams.topMargin = (int) getActivity().getResources().getDimension(R.dimen.btns_heigh);
                break;
        }
        sv.setButtonPosition(svButtonParams);
    }

    private void svSetUpOtherView() {
        sv.setContentTitle("");
        sv.setContentText("");
        additional_view = View.inflate(getActivity(), R.layout.showcase_text, null);
        RelativeLayout.LayoutParams lps = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        lps.addRule(RelativeLayout.CENTER_IN_PARENT);
        tvSvTitle = (TextView) additional_view.findViewById(R.id.tvSvTitle);
        tvSvTitle.setText(elements.get(svStep).title);
        tvSvDetail = (TextView) additional_view.findViewById(R.id.tvSvDetailText);
        tvSvDetail.setText(elements.get(svStep).description);
        sv.addView(additional_view, 0, lps);
    }

    private void showCaseSwitcher() {
        if (svStep < elements.size()) {
            if (additional_view != null)
                sv.removeView(additional_view);

            sv.setShowcase(elements.get(svStep).target, true);
            svSetButtonPosition(elements.get(svStep).b_pos);

            if (elements.get(svStep).use_splashscreen) {
                svSetUpOtherView();
            } else {
                sv.setContentTitle(elements.get(svStep).title);
                sv.setContentText(elements.get(svStep).description);
            }

            svStep++;
        } else {
            ViewGroup mRootView = (ViewGroup) getActivity().getWindow().getDecorView().findViewById(android.R.id.content);
            for (View v : getAllChildrenBFS(mRootView)) v.setEnabled(true);

            sv.hide();
            if (elements.get(svStep - 1).title.equals(getString(R.string.sv_intention_addweek_title))) {
                final Message m1 = mHandler.obtainMessage(123);
                mHandler.sendMessage(m1);
            }

            getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_USER);
        }
    }

    public void setHandler(Handler handler) {
        this.mHandler = handler;
    }

    @Override
    public void onAttach(Activity ac) {
        super.onAttach(ac);
        Log.d("123", "onattach");

    }


    private List<View> getAllChildrenBFS(View v) {
        List<View> visited = new ArrayList<View>();
        List<View> unvisited = new ArrayList<View>();
        unvisited.add(v);

        while (!unvisited.isEmpty()) {
            View child = unvisited.remove(0);
            visited.add(child);
            if (!(child instanceof ViewGroup)) continue;
            ViewGroup group = (ViewGroup) child;
            final int childCount = group.getChildCount();
            for (int i=0; i<childCount; i++) unvisited.add(group.getChildAt(i));
        }

        return visited;
    }

    @Override
    public void onCreate(Bundle b) {
        super.onCreate(b);
        Log.d("123", "oncreate");
    }


    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        //SHOWCASE INITIALIZATION THING*************************************************************

        if (!is_sc_done && frShowCase.elements != null) {
            getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
            if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {
                PowerManager pm = (PowerManager) getActivity().getSystemService(Context.POWER_SERVICE);
                boolean isScreenOn = pm.isScreenOn();
                if (isScreenOn) {
                    is_sc_done = true;

                    ViewGroup mRootView = (ViewGroup) getActivity().getWindow().getDecorView().findViewById(android.R.id.content);
                    for (View v : getAllChildrenBFS(mRootView)) v.setEnabled(false);

                    cbActivity.BoolToPref(getActivity().getLocalClassName(), false);

                    sv = new ShowcaseView.Builder(getActivity())
                            .setTarget(frShowCase.elements.get(0).target)
                            .setContentTitle(frShowCase.elements.get(svStep).title)
                            .setContentText(frShowCase.elements.get(svStep).description)
                            .setStyle(R.style.CustomShowcaseTheme)
                            .setOnClickListener(showCaseListener)
                            .build();

                    if (elements.get(svStep).use_splashscreen)
                        svSetUpOtherView();


                    svSetButtonPosition(frShowCase.elements.get(0).b_pos);
                    sv.setButtonText(getActivity().getString(R.string.next));

                    svStep++;
                }
            }
            return sv;
        }
        //**************************************************************************************
        return container;
    }

}

 

Here is a class for targets I use to pass Targets from Activities to that Fragment
 

xShowCaseTargets.java 
 

 import com.github.amlcurran.showcaseview.targets.Target;

    /**
     * Created by Movsar Bekaev on 15/09/2015.
     */
    public class xSchowCaseTarget{
        protected cbActivity.position b_pos = cbActivity.position.BOTTOM_RIGHT;
        protected Target target = null;
        protected String title = "";
        protected String description = "";
        protected boolean use_splashscreen = false;

        public xSchowCaseTarget(Target target, String title, String desc, cbActivity.position position, Boolean useSplash) {
            this.b_pos = position;
            this.target = target;
            this.title = title;
            this.description = desc;
            this.use_splashscreen = useSplash;
        }

        public xSchowCaseTarget(Target target, String title, String desc, cbActivity.position position) {
            this.b_pos = position;
            this.target = target;
            this.title = title;
            this.description = desc;
            this.use_splashscreen = false;
        }    
    }

 

This is the xml for custom layout for ShowCaseView to use when default one won't do his job (text go off from the screen, button not there where it should be and etc.)
 

showcase_text.xml
 

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <ScrollView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:id="@+id/scvShowCase" >

        <LinearLayout
            android:orientation="vertical"
            android:layout_width="match_parent"
            android:layout_height="match_parent">

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/welcome"
                android:id="@+id/tvSvTitle"
                android:layout_gravity="center_horizontal"
                android:layout_marginTop="50dp"
                android:textColor="?attr/color_7"
                android:textSize="@dimen/h1_size"
                android:textStyle="bold" />

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/welcome_text"
                android:id="@+id/tvSvDetailText"
                android:layout_gravity="center_horizontal"
                android:textColor="?attr/color_4"
                android:layout_marginTop="30dp"
                android:layout_marginLeft="5dp"
                android:layout_marginRight="5dp"
                android:textSize="@dimen/text_normal_size"
                android:gravity="center" />
        </LinearLayout>
    </ScrollView>

</FrameLayout>

 

As to cbActivity.BoolFromPref(getLocalClassName(), false) - I use shared preferences to check whether or not this Activity has been started, so this line checks this value, also in Fragment's code you see blocking all views of layout while presentation, if you don't need it - don't call that.
 

If you need to use custom view, you add "true" when creating a Target like this:
 

svElements.add(new xSchowCaseTarget(Target.NONE, getString(R.string.welcome), getString(R.string.welcome_text), position.FILL_BOTTOM, true));

 

And the last thing is, the cbActivity - mybase class for Activities, I use it here as reference to the common methods and vars, so the position enum is declared in that class, and it looks like:
 

 public enum position {TOP_RIGHT, TOP_LEFT, BOTTOM_RIGHT, BOTTOM_LEFT, CENTER, BOTTOM_CENTER, CENTER_TOP, FILL_BOTTOM, FILL_TOP}

 

Here is an example of how I call ShowcaseView from Activities: 
 

 if (cbActivity.BoolFromPref(getLocalClassName(), false)) {
            ArrayList<xSchowCaseTarget> svElements = new ArrayList<xSchowCaseTarget>();
            svElements.add(new xSchowCaseTarget(Target.NONE, getString(R.string.welcome), getString(R.string.welcome_text), position.FILL_BOTTOM, true));
            svElements.add(new xSchowCaseTarget(new ViewTarget(R.id.xxx, ActMain.this), getString(R.string.xxx), getString(R.string.xxx), position.BOTTOM_LEFT));
            svElements.add(new xSchowCaseTarget(new ViewTarget(R.id.xxx, ActMain.this), getString(R.string.xxx), getString(R.xxx), position.BOTTOM_RIGHT));
            if (isThereActionMenuButton())
                svElements.add(new xSchowCaseTarget(new ActionViewTarget(ActMain.this, ActionViewTarget.Type.OVERFLOW), getString(R.string.xxx), getString(R.string.xxx), position.FILL_BOTTOM));
            svElements.add(new xSchowCaseTarget(new ViewTarget(R.id.xxx, ActMain.this), getString(R.string.xxx), getString(R.string.xxx), position.CENTER));

            frShowCase frSC = frShowCase.newInstance(svElements);
            fm.beginTransaction().add(frSC , "xxx").commit();
        }

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