在现有布局的顶部添加一个透明的片段（android0

Question

我想创建一种透明的教程，第一次只出现 这是我创建的片段，如何将它添加到顶部现有布局

这里的片段

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; 

    } 

} 

我需要添加这在现有布局

Answer 1

顶部的代码，我想是的FrameLayout去这里的路。

FrameLayout的秘密就是它如何布局它的子项。尽管通常设计为包含一个项目，但它会愉快地将其他元素叠加在一起。这样的FrameLayout本质上是一种方式来操纵的意见Z-顺序屏幕

下面就关于什么的FrameLayout可以做螺纹：
what does FrameLayout do?

所以，你的布局会是这个样子：

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

Answer 2

你可以用下面的方法做。 这是您最需要添加片段的活动。

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


    <LinearLayout 
     android:id="@+id/example_fragment_parent" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent"> 

     //YOUR LAYOUT 

    </LinearLayout> 

    <LinearLayout 
     android:id="@+id/example_fragment_parent" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     android:onClick="EndFragment"> 

     /*THE FRAGMENT YOU WANT TO SHOW. THE LOGIC TO SHOW THIS FRAGMENT 
      ONLY ONCE WILL HAVE TO BE IN THE ACTIVITY ON TOP OF WHICH YOU ARE 
      SHOWING THIS FRAGMENT*/ 

     <fragment 
      android:id="@+id/example_fragment" 
      android:name="com.example.ExampleFragment" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent"/> 

    </LinearLayout> 

</RelativeLayout> 

现在你应该做的就是只显示一次该片段。 OnClick方法来隐藏这个片段如下：

public void EndFragment(View view) { 
    example_fragment_parent.setVisibility(View.GONE); 
} 

你需要找到这个片段在OnCreate（）你的活动象下面这样：

LinearLayout example_fragment_parent = 
(LinearLayout)findViewById(R.id.example_fragment_parent);