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 }