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      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 
     48     public SimpleTextFragment() {
     49     }
     50 
     51     @Override
     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 
     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      */
     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      */
     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 }