Java tutorial
/* * Copyright (c) 2015,2016 Annie Hui @ RStar Technology Solutions * * 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. */ package com.rstar.mobile.simpledemos; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v7.app.AppCompatActivity; // An example of an activity hosting an invisible fragment declared in a separate class. // Declare fragments in separate classes when such fragments have complex logic or are reusable elsewhere. public class DemoInvisibleFragmentActivity extends AppCompatActivity { Fragment fragment; int fragmentId = R.id.activity_container; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_container); FragmentManager fm = getSupportFragmentManager(); fragment = fm.findFragmentById(fragmentId); if (fragment == null) { fragment = InvisibleFragment.newInstance("Demo Activity with invisible fragment."); fm.beginTransaction().add(fragmentId, fragment).commit(); } } }