FAB and notification creation fragment

app/src/main/java/net/headlezz/notificationlogger/MainActivity.java

@@ -3,35 +3,77 @@ package net.headlezz.notificationlogger;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
+import android.support.design.widget.FloatingActionButton;
 import android.support.v7.app.AppCompatActivity;
 import android.support.v7.widget.Toolbar;
+import android.view.Menu;
 import android.view.MenuItem;
+import android.view.View;
 
 import butterknife.Bind;
 import butterknife.ButterKnife;
 
-public class MainActivity extends AppCompatActivity implements Toolbar.OnMenuItemClickListener {
+public class MainActivity extends AppCompatActivity {
 
     @Bind(R.id.toolbar)
     Toolbar mToolbar;
 
+    @Bind(R.id.main_menu_fab_add_notification)
+    FloatingActionButton mFAB;
+
     @Override
     protected void onCreate(@Nullable Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.main_activity);
         ButterKnife.bind(this);
 
-        mToolbar.inflateMenu(R.menu.main_activity);
-        mToolbar.setTitle(getString(R.string.app_name));
-        mToolbar.setOnMenuItemClickListener(this);
+        setSupportActionBar(mToolbar);
+
+        mFAB.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                openNotificationCreationScreen();
+            }
+        });
+
+        if(getSupportFragmentManager().findFragmentById(R.id.main_menu_fragment_container) == null) {
+            getSupportFragmentManager().beginTransaction()
+                    .add(R.id.main_menu_fragment_container, new NotificationListFragment())
+                    .commit();
+        }
     }
 
     @Override
-    public boolean onMenuItemClick(MenuItem item) {
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.main_activity, menu);
+        return super.onCreateOptionsMenu(menu);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
         if(item.getItemId() == R.id.menu_settings) {
             Intent intent = new Intent(this, PreferenceActivity.class);
             startActivity(intent);
+            return true;
         }
-        return false;
+        return super.onOptionsItemSelected(item);
+    }
+
+
+    @SuppressWarnings("ConstantConditions")
+    void openNotificationCreationScreen() {
+        getSupportFragmentManager().beginTransaction()
+                .replace(R.id.main_menu_fragment_container, new NotificationCreationFragment())
+                .addToBackStack(NotificationCreationFragment.class.getSimpleName())
+                .commit();
+        mFAB.setVisibility(View.GONE);
+    }
+
+    @Override
+    public void onBackPressed() {
+        // make fab visible if we come back to first fragment
+        if(getSupportFragmentManager().getBackStackEntryCount() == 1)
+            mFAB.setVisibility(View.VISIBLE);
+        super.onBackPressed();
     }
 }

app/src/main/java/net/headlezz/notificationlogger/NotificationCreationFragment.java

@@ -0,0 +1,31 @@
+package net.headlezz.notificationlogger;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v4.app.Fragment;
+import android.support.v7.app.AppCompatActivity;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+public class NotificationCreationFragment extends Fragment {
+
+    @Nullable
+    @Override
+    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        TextView textView = new TextView(getContext());
+        textView.setGravity(Gravity.CENTER);
+        textView.setText(getClass().getSimpleName());
+        return textView;
+    }
+
+    @SuppressWarnings("ConstantConditions")
+    @Override
+    public void onAttach(Activity activity) {
+        super.onAttach(activity);
+        ((AppCompatActivity) activity).getSupportActionBar().setTitle(getString(R.string.title_create_notification));
+    }
+}

app/src/main/java/net/headlezz/notificationlogger/NotificationListFragment.java

@@ -0,0 +1,31 @@
+package net.headlezz.notificationlogger;
+
+import android.app.Activity;
+import android.os.Bundle;
+import android.support.annotation.Nullable;
+import android.support.v4.app.Fragment;
+import android.support.v7.app.AppCompatActivity;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+public class NotificationListFragment extends Fragment {
+
+    @Nullable
+    @Override
+    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
+        TextView textView = new TextView(getContext());
+        textView.setGravity(Gravity.CENTER);
+        textView.setText(getClass().getSimpleName());
+        return textView;
+    }
+
+    @SuppressWarnings("ConstantConditions")
+    @Override
+    public void onAttach(Activity activity) {
+        super.onAttach(activity);
+        ((AppCompatActivity) activity).getSupportActionBar().setTitle(getString(R.string.app_name));
+    }
+}

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

@@ -1,8 +1,33 @@
 <?xml version="1.0" encoding="utf-8"?>
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <include layout="@layout/toolbar" />
+    <android.support.design.widget.AppBarLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+        <include layout="@layout/toolbar" />
+    </android.support.design.widget.AppBarLayout>
 
-</FrameLayout>
+    <FrameLayout
+        android:id="@+id/main_menu_fragment_container"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
+        <android.support.design.widget.FloatingActionButton
+            android:contentDescription="@string/fab_cd_create_notification"
+            android:layout_gravity="bottom|end|right"
+            android:id="@+id/main_menu_fab_add_notification"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            app:fabSize="normal"
+            android:src="@drawable/ic_action_add"
+            android:layout_marginBottom="8dp"
+            android:layout_marginEnd="8dp"
+            android:layout_marginRight="8dp"/>
+
+    </FrameLayout>
+
+
+</android.support.design.widget.CoordinatorLayout>

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

@@ -7,4 +7,5 @@
     app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
     app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
     android:layout_width="match_parent"
-    android:layout_height="?attr/actionBarSize" />
+    android:layout_height="?attr/actionBarSize"
+    app:layout_scrollFlags="scroll|enterAlways"/>

app/src/main/res/values/strings.xml

@@ -13,4 +13,6 @@
     <string name="pref_clear_database_summary">Remove all logged notifications</string>
     <string name="pref_export_title">Export to sdcard</string>
     <string name="pref_about_title">About</string>
+    <string name="fab_cd_create_notification">FAB: Create notification</string>
+    <string name="title_create_notification">Create notification</string>
 </resources>