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      1 /*
      2  * Copyright (C) 2016 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 package com.android.settingslib.core.lifecycle;
     17 
     18 import android.app.DialogFragment;
     19 import android.content.Context;
     20 import android.support.annotation.VisibleForTesting;
     21 import android.view.Menu;
     22 import android.view.MenuInflater;
     23 import android.view.MenuItem;
     24 
     25 /**
     26  * {@link DialogFragment} that has hooks to observe fragment lifecycle events.
     27  */
     28 public class ObservableDialogFragment extends DialogFragment {
     29 
     30     protected final Lifecycle mLifecycle = createLifecycle();
     31 
     32     @Override
     33     public void onAttach(Context context) {
     34         super.onAttach(context);
     35         mLifecycle.onAttach(context);
     36     }
     37 
     38     @Override
     39     public void onStart() {
     40         mLifecycle.onStart();
     41         super.onStart();
     42     }
     43 
     44     @Override
     45     public void onResume() {
     46         mLifecycle.onResume();
     47         super.onResume();
     48     }
     49 
     50     @Override
     51     public void onPause() {
     52         mLifecycle.onPause();
     53         super.onPause();
     54     }
     55 
     56     @Override
     57     public void onStop() {
     58         mLifecycle.onStop();
     59         super.onStop();
     60     }
     61 
     62     @Override
     63     public void onDestroy() {
     64         mLifecycle.onDestroy();
     65         super.onDestroy();
     66     }
     67 
     68     @Override
     69     public void onCreateOptionsMenu(final Menu menu, final MenuInflater inflater) {
     70         mLifecycle.onCreateOptionsMenu(menu, inflater);
     71         super.onCreateOptionsMenu(menu, inflater);
     72     }
     73 
     74     @Override
     75     public void onPrepareOptionsMenu(final Menu menu) {
     76         mLifecycle.onPrepareOptionsMenu(menu);
     77         super.onPrepareOptionsMenu(menu);
     78     }
     79 
     80     @Override
     81     public boolean onOptionsItemSelected(final MenuItem menuItem) {
     82         boolean lifecycleHandled = mLifecycle.onOptionsItemSelected(menuItem);
     83         if (!lifecycleHandled) {
     84             return super.onOptionsItemSelected(menuItem);
     85         }
     86         return lifecycleHandled;
     87     }
     88 
     89     @VisibleForTesting(otherwise = VisibleForTesting.NONE)
     90     /** @return a new lifecycle. */
     91     public static Lifecycle createLifecycle() {
     92         return new Lifecycle();
     93     }
     94 }
     95