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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License
     15  */
     16 
     17 package com.android.car.settings.common;
     18 
     19 import android.app.Fragment;
     20 import android.os.Bundle;
     21 import android.support.annotation.LayoutRes;
     22 import android.support.annotation.StringRes;
     23 import android.support.v7.app.ActionBar;
     24 import android.support.v7.app.AppCompatActivity;
     25 import android.support.v7.widget.Toolbar;
     26 import android.view.LayoutInflater;
     27 import android.view.View;
     28 import android.view.ViewGroup;
     29 import android.widget.TextView;
     30 
     31 import com.android.car.settings.R;
     32 
     33 import java.util.Set;
     34 
     35 /**
     36  * Base fragment for setting activity.
     37  */
     38 public abstract class BaseFragment extends Fragment {
     39     public static final String EXTRA_TITLE_ID = "extra_title_id";
     40     public static final String EXTRA_LAYOUT = "extra_layout";
     41     public static final String EXTRA_ACTION_BAR_LAYOUT = "extra_action_bar_layout";
     42 
     43     /**
     44      * Controls the transition of fragment.
     45      */
     46     public interface FragmentController {
     47         /**
     48          * Launches fragment in the main container of current activity.
     49          */
     50         void launchFragment(BaseFragment fragment);
     51 
     52         /**
     53          * Pops the top off the fragment stack.
     54          */
     55         void goBack();
     56     }
     57 
     58     @LayoutRes
     59     protected int mLayout;
     60 
     61     @LayoutRes
     62     private int mActionBarLayout;
     63 
     64     @StringRes
     65     private int mTitleId;
     66 
     67     protected FragmentController mFragmentController;
     68 
     69     public void setFragmentController(FragmentController fragmentController) {
     70         mFragmentController = fragmentController;
     71     }
     72 
     73     protected static Bundle getBundle() {
     74         Bundle bundle = new Bundle();
     75         bundle.putInt(EXTRA_ACTION_BAR_LAYOUT, R.layout.action_bar);
     76         return bundle;
     77     }
     78 
     79     @Override
     80     public void onCreate(Bundle savedInstanceState) {
     81         super.onCreate(savedInstanceState);
     82         Set<String> extraKeys = getArguments().keySet();
     83         if (extraKeys.contains(EXTRA_ACTION_BAR_LAYOUT)) {
     84             mActionBarLayout = getArguments().getInt(EXTRA_ACTION_BAR_LAYOUT);
     85         } else {
     86             throw new IllegalArgumentException("must specify a actionBar layout");
     87         }
     88         if (extraKeys.contains(EXTRA_LAYOUT)) {
     89             mLayout = getArguments().getInt(EXTRA_LAYOUT);
     90         } else {
     91             throw new IllegalArgumentException("must specify a layout");
     92         }
     93         if (extraKeys.contains(EXTRA_TITLE_ID)) {
     94             mTitleId = getArguments().getInt(EXTRA_TITLE_ID);
     95         } else {
     96             throw new IllegalArgumentException("must specify a title");
     97         }
     98     }
     99 
    100     @Override
    101     public View onCreateView(LayoutInflater inflater, ViewGroup container,
    102             Bundle savedInstanceState) {
    103         return inflater.inflate(mLayout, container, false);
    104     }
    105 
    106     @Override
    107     public void onActivityCreated(Bundle savedInstanceState) {
    108         super.onActivityCreated(savedInstanceState);
    109         ActionBar actionBar = ((AppCompatActivity) getActivity()).getSupportActionBar();
    110         actionBar.setDisplayHomeAsUpEnabled(false);
    111         actionBar.setCustomView(mActionBarLayout);
    112         actionBar.setDisplayShowCustomEnabled(true);
    113         // make the toolbar take the whole width.
    114         Toolbar toolbar=(Toolbar)actionBar.getCustomView().getParent();
    115         toolbar.setPadding(0, 0, 0, 0);
    116         getActivity().findViewById(R.id.action_bar_icon_container).setOnClickListener(
    117                 v -> mFragmentController.goBack());
    118         ((TextView) getActivity().findViewById(R.id.title)).setText(mTitleId);
    119     }
    120 }
    121