1 /*
2  * Copyright 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.basicnetworking;
18 
19 import android.os.Bundle;
20 
21 import android.support.v4.app.Fragment;
22 import android.util.Log;
23 import android.view.Gravity;
24 import android.view.LayoutInflater;
25 import android.view.View;
26 import android.view.ViewGroup;
27 import android.widget.TextView;
28 
29 /**
30  * Simple fragment containing only a TextView. Used by TextPagerAdapter to create
31  * tutorial-style pages for apps.
32  */
33 public class SimpleTextFragment extends Fragment {
34 
35     // Contains the text that will be displayed by this Fragment
36     String mText;
37 
38     // Contains a resource ID for the text that will be displayed by this fragment.
39     int mTextId = -1;
40 
41     // Keys which will be used to store/retrieve text passed in via setArguments.
42     public static final String TEXT_KEY = "text";
43     public static final String TEXT_ID_KEY = "text_id";
44 
45     // For situations where the app wants to modify text at Runtime, exposing the TextView.
46     private TextView mTextView;
47 
SimpleTextFragment()48     public SimpleTextFragment() {
49     }
50 
51     @Override
onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)52     public View onCreateView(LayoutInflater inflater, ViewGroup container,
53             Bundle savedInstanceState) {
54         // Before initializing the textView, check if any arguments were provided via setArguments.
55         processArguments();
56 
57         // Create a new TextView and set its text to whatever was provided.
58         mTextView = new TextView(getActivity());
59         mTextView.setGravity(Gravity.CENTER);
60 
61         if (mText != null) {
62             mTextView.setText(mText);
63             Log.i("SimpleTextFragment", mText);
64         }
65         return mTextView;
66     }
67 
getTextView()68     public TextView getTextView() {
69         return mTextView;
70     }
71 
72     /**
73      * Changes the text for this TextView, according to the resource ID provided.
74      * @param stringId A resource ID representing the text content for this Fragment's TextView.
75      */
setText(int stringId)76     public void setText(int stringId) {
77         getTextView().setText(getActivity().getString(stringId));
78     }
79 
80     /**
81      * Processes the arguments passed into this Fragment via setArguments method.
82      * Currently the method only looks for text or a textID, nothing else.
83      */
processArguments()84     public void processArguments() {
85         // For most objects we'd handle the multiple possibilities for initialization variables
86         // as multiple constructors.  For Fragments, however, it's customary to use
87         // setArguments / getArguments.
88         if (getArguments() != null) {
89             Bundle args = getArguments();
90             if (args.containsKey(TEXT_KEY)) {
91                 mText = args.getString(TEXT_KEY);
92                 Log.d("Constructor", "Added Text.");
93             } else if (args.containsKey(TEXT_ID_KEY)) {
94                 mTextId = args.getInt(TEXT_ID_KEY);
95                 mText = getString(mTextId);
96             }
97         }
98     }
99 }