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<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <com.jakewharton.scalpel.ScalpelFrameLayout
        android:id="@+id/scalpel"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
    <LinearLayout
        android:id="@+id/scalpel_drawer"
        android:orientation="vertical"
        android:layout_width="220dp"
        android:layout_height="match_parent"
        android:layout_gravity="end"
        android:padding="16dp"
        android:background="#ff444444">
        <Switch
            android:id="@+id/scalpel_enabled"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Scalpel" />
        <CheckBox
            android:id="@+id/scalpel_draw_views"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="8dp"
            android:text="Draw Views" />
    </LinearLayout>
</android.support.v4.widget.DrawerLayout>

package com.example.scalpeldrawer;

import android.app.Activity;
import android.os.Bundle;

public class TheBaseActivity extends Activity {

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        if (BuildConfig.DEBUG) {
            // prepare for surgery
            ScalpelDrawer scalpelDrawer = new ScalpelDrawer(this);
            scalpelDrawer.wrapInside(this);
        }
    }

}

package com.example.scalpeldrawer;

import android.app.Activity;
import android.content.Context;
import android.support.v4.widget.DrawerLayout;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.Switch;

import com.jakewharton.scalpel.ScalpelFrameLayout;

public class ScalpelDrawer extends DrawerLayout {

    private ScalpelFrameLayout scalpelView;
    private Switch enabledSwitch;
    private CheckBox drawViews;

    public ScalpelDrawer(Context context) {
        super(context);
        init();
    }

    public ScalpelDrawer(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public ScalpelDrawer(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    public void wrapInside(Activity activity) {
        ViewGroup parent = (ViewGroup) activity.findViewById(android.R.id.content);
        View content = parent.getChildAt(0);
        parent.removeViewAt(0);
        scalpelView.addView(content);
        parent.addView(this);
    }

    private void init() {
        LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        addView(inflater.inflate(R.layout.scalpel_drawer, null));
        scalpelView = (ScalpelFrameLayout) findViewById(R.id.scalpel);
        enabledSwitch = (Switch) findViewById(R.id.scalpel_enabled);
        drawViews = (CheckBox) findViewById(R.id.scalpel_draw_views);
        enabledSwitch.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                scalpelView.setLayerInteractionEnabled(isChecked);
                drawViews.setEnabled(isChecked);
            }
        });
        drawViews.setChecked(true);
        drawViews.setEnabled(false);
        drawViews.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                scalpelView.setDrawViews(isChecked);
            }
        });
    }

}