MainActivity.java

package com.survivingwithandroid.ubiapp;

/*
 * Copyright (C) 2015, francesco Azzola 
 *
 *(http://www.survivingwithandroid.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * 30/11/15
 */

import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.widget.FrameLayout;

public class MainActivity extends AppCompatActivity {

    @java.lang.Override
    protected void onCreate(android.os.Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_layout);
        setToolBar();

        FragmentTransaction tra = getSupportFragmentManager().beginTransaction();
        tra.add(R.id.frgmt, new ChartFragment());
        tra.commit();
    }

    private void setToolBar() {
        Toolbar tb = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(tb);
        ActionBar ab = getSupportActionBar();
        ab.setDisplayHomeAsUpEnabled(true);
    }

}