SimpleTextFragment.java

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