ActivityB.java

public class ActivityB extends BaseActivity {
    private static final String TAG = ActivityB.class.getSimpleName();

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActionBar actionBar = getSupportActionBar();
        if(actionBar != null) {
            actionBar.setTitle(TAG);
        }

        if(mButtonB != null) {
            mButtonB.setVisibility(View.VISIBLE);
            mButtonB.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent activityCIntent = new Intent(ActivityB.this, ActivityC.class);
                    startActivity(activityCIntent);
                }
            });
        }

        Intent intent = getIntent();
        int cActivityExtra;
        cActivityExtra = intent.getIntExtra(ActivityC.ACTIVITY_C_EXTRA, 0);
        if(cActivityExtra != 0 && mTextView != null) {
            mTextView.setText("Extra is " + cActivityExtra);
        }
        int mainExtra;
        mainExtra = intent.getIntExtra(MainActivity.MAIN_ACTIVITY_EXTRA, 0);
        if(mainExtra != 0 && mTextView != null) {
            mTextView.setText("Extra is " + mainExtra);
        }

    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            // Respond to the action bar's Up/Home button
            case android.R.id.home:
                NavUtils.navigateUpFromSameTask(this);
                return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

ActivityC.java

public class ActivityC extends BaseActivity {
    private static final String TAG = ActivityC.class.getSimpleName();
    public static final String ACTIVITY_C_EXTRA = TAG + "_activity_c";

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        ActionBar actionBar = getSupportActionBar();
        if(actionBar != null) {
            actionBar.setTitle(TAG);
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            // Respond to the action bar's Up/Home button
            case android.R.id.home:
                NavUtils.navigateUpFromSameTask(this);
                return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.allday.doubleacoding.upnav">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name="com.allday.doubleacoding.upnav.ActivityB"
            android:parentActivityName="com.allday.doubleacoding.upnav.MainActivity">
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="com.allday.doubleacoding.upnav.MainActivity" />
            </activity>
        <activity android:name="com.allday.doubleacoding.upnav.ActivityC"
            android:parentActivityName="com.allday.doubleacoding.upnav.ActivityB">
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="com.allday.doubleacoding.upnav.ActivityB" />
            </activity>
    </application>

</manifest>

BaseActivity.java

public class BaseActivity extends AppCompatActivity {

    protected TextView mTextView;
    protected ActionBar mActionBar;
    protected Button mButtonA;
    protected Button mButtonB;
    protected Button mButtonC;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mTextView = (TextView) findViewById(R.id.textbox);
        mActionBar = getSupportActionBar();
        mButtonA = (Button) findViewById(R.id.button_a);
        mButtonB = (Button) findViewById(R.id.button_b);
        mButtonC = (Button) findViewById(R.id.button_c);
        if(mActionBar != null) {
            mActionBar.setDisplayHomeAsUpEnabled(true);
            mActionBar.setHomeButtonEnabled(true);
        }
    }
}

MainActivity.java

public class MainActivity extends BaseActivity {

    private static final String TAG = MainActivity.class.getSimpleName();
    public static final String MAIN_ACTIVITY_EXTRA = TAG + "_main_activity_extra";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mActionBar.setDisplayHomeAsUpEnabled(false);
        mActionBar.setTitle(TAG);

        if(mButtonA != null) {
            mButtonA.setVisibility(View.VISIBLE);
            mButtonA.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent activityBIntent = new Intent(MainActivity.this, ActivityB.class);
                    startActivity(activityBIntent);
                }
            });
        }
        if(mButtonB != null) {
            mButtonB.setVisibility(View.VISIBLE);
            mButtonB.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent activityCIntent = new Intent(MainActivity.this, ActivityC.class);
                    startActivity(activityCIntent);
                }
            });
        }

    }
}