erikjhordanrey.base_components.view.BaseFragmentActivity.java Source code

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Here is the source code for erikjhordanrey.base_components.view.BaseFragmentActivity.java

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/*
 * Copyright (C) 2017 Erik Jhordan Rey.
 *
 * 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 erikjhordanrey.base_components.view;

import android.support.annotation.IdRes;
import android.support.annotation.LayoutRes;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import erikjhordanrey.base_components.R;

public abstract class BaseFragmentActivity extends BaseActivity {

    private Fragment fragment;

    @Override
    protected void initActivity() {
        super.initActivity();
        initFragment();
    }

    /**
     * Initialize a fragment into an Activity
     */

    private void initFragment() {
        final FragmentManager fragmentManager = getSupportFragmentManager();
        Integer containerId = R.id.container;
        if (getContainerId() != null) {
            containerId = getContainerId();
        }
        fragment = fragmentManager.findFragmentById(containerId);
        if (fragment == null) {
            fragment = getFragmentInstance();
            fragmentManager.beginTransaction().add(containerId, fragment).commit();
        }
    }

    /**
     * @return the layout id associated to the layout used in the fragment.
     */

    @Override
    @LayoutRes
    protected int getLayoutResId() {
        return R.layout.default_container;
    }

    /**
     * @return containerViewId Optional identifier of the container this fragment is
     * to be placed in.
     */

    @IdRes
    protected Integer getContainerId() {
        return R.id.container;
    }

    /**
     * @return The new fragment to place in the container
     */

    protected abstract Fragment getFragmentInstance();

    /**
     * @return nested target fragment
     */
    public Fragment getNestedTargetFragment() {
        return fragment;
    }
}