1 /*
2  * Copyright (C) 2013 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.example.android.contactslist.ui;
18 
19 import android.annotation.TargetApi;
20 import android.net.Uri;
21 import android.os.Build;
22 import android.os.Bundle;
23 import android.support.v4.app.FragmentActivity;
24 import android.support.v4.app.FragmentTransaction;
25 import android.support.v4.app.NavUtils;
26 import android.view.MenuItem;
27 
28 import com.example.android.contactslist.BuildConfig;
29 import com.example.android.contactslist.util.Utils;
30 
31 /**
32  * This class defines a simple FragmentActivity as the parent of {@link ContactDetailFragment}.
33  */
34 public class ContactDetailActivity extends FragmentActivity {
35     // Defines a tag for identifying the single fragment that this activity holds
36     private static final String TAG = "ContactDetailActivity";
37 
38     @TargetApi(Build.VERSION_CODES.HONEYCOMB)
39     @Override
onCreate(Bundle savedInstanceState)40     protected void onCreate(Bundle savedInstanceState) {
41         if (BuildConfig.DEBUG) {
42             // Enable strict mode checks when in debug modes
43             Utils.enableStrictMode();
44         }
45         super.onCreate(savedInstanceState);
46 
47         // This activity expects to receive an intent that contains the uri of a contact
48         if (getIntent() != null) {
49 
50             // For OS versions honeycomb and higher use action bar
51             if (Utils.hasHoneycomb()) {
52                 // Enables action bar "up" navigation
53                 getActionBar().setDisplayHomeAsUpEnabled(true);
54             }
55 
56             // Fetch the data Uri from the intent provided to this activity
57             final Uri uri = getIntent().getData();
58 
59             // Checks to see if fragment has already been added, otherwise adds a new
60             // ContactDetailFragment with the Uri provided in the intent
61             if (getSupportFragmentManager().findFragmentByTag(TAG) == null) {
62                 final FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
63 
64                 // Adds a newly created ContactDetailFragment that is instantiated with the
65                 // data Uri
66                 ft.add(android.R.id.content, ContactDetailFragment.newInstance(uri), TAG);
67                 ft.commit();
68             }
69         } else {
70             // No intent provided, nothing to do so finish()
71             finish();
72         }
73     }
74 
75     @Override
onOptionsItemSelected(MenuItem item)76     public boolean onOptionsItemSelected(MenuItem item) {
77         switch (item.getItemId()) {
78             case android.R.id.home:
79                 // Tapping on top left ActionBar icon navigates "up" to hierarchical parent screen.
80                 // The parent is defined in the AndroidManifest entry for this activity via the
81                 // parentActivityName attribute (and via meta-data tag for OS versions before API
82                 // Level 16). See the "Tasks and Back Stack" guide for more information:
83                 // http://developer.android.com/guide/components/tasks-and-back-stack.html
84                 NavUtils.navigateUpFromSameTask(this);
85                 return true;
86         }
87         // Otherwise, pass the item to the super implementation for handling, as described in the
88         // documentation.
89         return super.onOptionsItemSelected(item);
90     }
91 }
92