fix: fixes Scrolling toolbar in SafetyPlanActivity

app/src/main/java/com/peacecorps/pcsa/safety_tools/SafetyPlanActivity.java

@@ -1,6 +1,9 @@
 package com.peacecorps.pcsa.safety_tools;
 
 import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.design.widget.AppBarLayout;
+import android.support.design.widget.CoordinatorLayout;
 import android.support.design.widget.TabLayout;
 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentManager;
@@ -23,28 +26,36 @@
  */
 public class SafetyPlanActivity extends AppCompatActivity {
 
-    private Toolbar toolbar;
-    private TabLayout tabLayout;
-    private ViewPager viewPager;
     public static final int PAGES = 2;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_safety_plan);
-
-        toolbar = (Toolbar) findViewById(R.id.toolbar);
+        AppBarLayout appBarLayout = (AppBarLayout) findViewById(R.id.appbar);
+        if (appBarLayout.getLayoutParams() != null) {
+            CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) appBarLayout.getLayoutParams();
+            AppBarLayout.Behavior behavior = new AppBarLayout.Behavior();
+            behavior.setDragCallback(new AppBarLayout.Behavior.DragCallback() {
+                @Override
+                public boolean canDrag(@NonNull AppBarLayout appBarLayout) {
+                    return false;
+                }
+            });
+            layoutParams.setBehavior(behavior);
+        }
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
         setSupportActionBar(toolbar);
         getSupportActionBar().setDisplayHomeAsUpEnabled(true);
         getSupportActionBar().setTitle(R.string.safety_plan_title);
-        viewPager = (ViewPager) findViewById(R.id.viewpager);
+        ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
         setupViewPager(viewPager);
-        tabLayout = (TabLayout) findViewById(R.id.tabs);
+        TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
         tabLayout.setupWithViewPager(viewPager);
     }
 
     public boolean onOptionsItemSelected(MenuItem item) {
-        switch (item.getItemId())
-        {
+        switch (item.getItemId()) {
             case android.R.id.home:
                 this.finish();
                 break;
@@ -67,22 +78,21 @@ class ViewPagerAdapter extends FragmentPagerAdapter {
         private final List<Fragment> mFragmentList = new ArrayList<>();
         private final List<String> mFragmentTitleList = new ArrayList<>();
 
-        public ViewPagerAdapter(FragmentManager manager) {
+        ViewPagerAdapter(FragmentManager manager) {
             super(manager);
         }
 
         @Override
         public Fragment getItem(int position) {
-            Fragment fragment = mFragmentList.get(position);
-            return fragment;
+            return mFragmentList.get(position);
         }
 
         @Override
         public int getCount() {
             return mFragmentList.size();
         }
 
-        public void addFragment(Fragment fragment, String title) {
+        void addFragment(Fragment fragment, String title) {
             mFragmentList.add(fragment);
             mFragmentTitleList.add(title);
         }

app/src/main/res/layout/activity_safety_plan.xml

@@ -4,15 +4,16 @@
     android:layout_height="match_parent">
 
     <android.support.design.widget.AppBarLayout
+        android:id="@+id/appbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
 
         <android.support.v7.widget.Toolbar
             android:id="@+id/toolbar"
             android:layout_width="match_parent"
-            android:layout_marginTop="@dimen/status_bar_size"
             android:layout_height="?attr/actionBarSize"
+            android:layout_marginTop="@dimen/status_bar_size"
             android:background="?attr/colorPrimary"
             app:layout_scrollFlags="scroll|enterAlways"
             app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />
@@ -28,5 +29,5 @@
         android:id="@+id/viewpager"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        app:layout_behavior="@string/appbar_scrolling_view_behavior"  />
+        app:layout_behavior="@string/appbar_scrolling_view_behavior" />
 </android.support.design.widget.CoordinatorLayout>