在现有布局(android0）的顶部添加一个透明片段

Question

import android.app.Fragment;
import android.content.SharedPreferences;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;

import in.webblue.nuclity.Activity.Logs.SaveLog;
import in.webblue.nuclity.R;

import static android.content.Context.MODE_PRIVATE;

/**
 * Created by Akshay on 15-06-2017.
 */

public class TutorialFragment extends Fragment {
    private String Class_Name = "TutorialFragment";
    private  boolean  ranBefore;
    View topLevelLayout1;
    View topLevelLayout2;
    View myView;
    String methodName = "onCreateView";

    public static TutorialFragment newInstance() {
        TutorialFragment f = new TutorialFragment();
        return f;
    }
    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
    Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        myView = inflater.inflate(R.layout.tutorial_layout, container, 
   false);
        topLevelLayout1=myView.findViewById(R.id.tutorial1);
        topLevelLayout2=myView.findViewById(R.id.tutorial2);
        if (!isFirstTime()) {
            topLevelLayout1.setVisibility(View.INVISIBLE);
            topLevelLayout2.setVisibility(View.INVISIBLE);

        }
   return  myView;
}

    private boolean isFirstTime()
    {
        try {
            SharedPreferences preferences = 
         this.getActivity().getSharedPreferences("RanBefore", MODE_PRIVATE);
            boolean ranBefore = preferences.getBoolean("RanBefore", false);
            if (!ranBefore) {

                SharedPreferences.Editor editor = preferences.edit();
                editor.putBoolean("RanBefore", true);
                editor.commit();
                topLevelLayout1.setVisibility(View.VISIBLE);
                topLevelLayout2.setVisibility(View.INVISIBLE);
                topLevelLayout1.setOnTouchListener(new 
                View.OnTouchListener() {

                    @Override
                    public boolean onTouch(View v, MotionEvent event) {
                        topLevelLayout1.setVisibility(View.INVISIBLE);
                        topLevelLayout2.setVisibility(View.VISIBLE);
                        return false;
                    }

                });
                topLevelLayout2.setOnTouchListener(new 
           View.OnTouchListener() {

                    @Override
                    public boolean onTouch(View v, MotionEvent event) {
                        topLevelLayout2.setVisibility(View.INVISIBLE);
                        return false;
                    }

                });


            }
        }
        catch (Exception e){
            Log.e(getClass().getName(),"Method Name :"+methodName+ " "+ e.getStackTrace().toString());
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {

      SaveLog.saveLog(getContext(),Class_Name,methodName,e.toString());
            }
        }
        return ranBefore;

    }

}

Answer 1

我认为FrameLayout是这里的路。

FrameLayout的秘密在于它如何布局其子级。虽然通常设计为包含一个项目，但它会愉快地将其他元素堆叠在一起。因此，FrameLayout本质上是一种操作屏幕上视图Z顺序的方法

这里有一个关于FrameLayout可以做什么的线程:
FrameLayout做什么？

<FrameLayout>
   <Fragment/>
   <LinearLayout>
   // here is your normal layout
   </LinearLayout>
</>