SimpleTextFragment.java

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/*
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 * Copyright 2013 The Android Open Source Project
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *     http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.example.android.basicnetworking;
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import android.os.Bundle;
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import android.support.v4.app.Fragment;
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import android.util.Log;
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import android.view.Gravity;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.TextView;
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/**
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 * Simple fragment containing only a TextView. Used by TextPagerAdapter to create
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 * tutorial-style pages for apps.
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 */
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public class SimpleTextFragment extends Fragment {
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    // Contains the text that will be displayed by this Fragment
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    String mText;
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    // Contains a resource ID for the text that will be displayed by this fragment.
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    int mTextId = -1;
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    // Keys which will be used to store/retrieve text passed in via setArguments.
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    public static final String TEXT_KEY = "text";
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    public static final String TEXT_ID_KEY = "text_id";
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    // For situations where the app wants to modify text at Runtime, exposing the TextView.
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    private TextView mTextView;
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    public SimpleTextFragment() {
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    }
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    @Override
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    public View onCreateView(LayoutInflater inflater, ViewGroup container,
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            Bundle savedInstanceState) {
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        // Before initializing the textView, check if any arguments were provided via setArguments.
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        processArguments();
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        // Create a new TextView and set its text to whatever was provided.
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        mTextView = new TextView(getActivity());
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        mTextView.setGravity(Gravity.CENTER);
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        if (mText != null) {
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            mTextView.setText(mText);
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            Log.i("SimpleTextFragment", mText);
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        }
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        return mTextView;
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    }
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    public TextView getTextView() {
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        return mTextView;
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    }
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    /**
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     * Changes the text for this TextView, according to the resource ID provided.
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     * @param stringId A resource ID representing the text content for this Fragment's TextView.
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     */
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    public void setText(int stringId) {
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        getTextView().setText(getActivity().getString(stringId));
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    }
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    /**
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     * Processes the arguments passed into this Fragment via setArguments method.
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     * Currently the method only looks for text or a textID, nothing else.
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     */
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    public void processArguments() {
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        // For most objects we'd handle the multiple possibilities for initialization variables
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        // as multiple constructors.  For Fragments, however, it's customary to use
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        // setArguments / getArguments.
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        if (getArguments() != null) {
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            Bundle args = getArguments();
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            if (args.containsKey(TEXT_KEY)) {
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                mText = args.getString(TEXT_KEY);
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                Log.d("Constructor", "Added Text.");
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            } else if (args.containsKey(TEXT_ID_KEY)) {
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                mTextId = args.getInt(TEXT_ID_KEY);
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                mText = getString(mTextId);
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            }
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        }
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    }
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}