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 SimpleTextFragment()47 public SimpleTextFragment() { 48 } 49 50 @Override onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)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 getTextView()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 */ setText(int stringId)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 */ processArguments()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 }