com.example.android.android_me.ui.BodyPartFragment.java Source code

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Here is the source code for com.example.android.android_me.ui.BodyPartFragment.java

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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

package com.example.android.android_me.ui;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.example.android.android_me.R;

import java.util.ArrayList;
import java.util.List;

public class BodyPartFragment extends Fragment {

    // Tag for logging
    private static final String TAG = "BodyPartFragment";
    public static final String IMAGE_ID_LIST = "image_ids";
    public static final String LIST_INDEX = "list_index";

    // Variables to store a list of image resources and the index of the image that this fragment displays
    private List<Integer> mImageIds;
    private int mListIndex;

    /**
     * Mandatory empty constructor for the fragment manager to instantiate the fragment
     */
    public BodyPartFragment() {
    }

    /**
     * Inflates the fragment layout file and sets the correct resource for the image to display
     */
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        // Inflate the Android-Me fragment layout
        View rootView = inflater.inflate(R.layout.fragment_body_part, container, false);

        //Check bundle
        if (savedInstanceState != null) {
            mImageIds = savedInstanceState.getIntegerArrayList(IMAGE_ID_LIST);
            mListIndex = savedInstanceState.getInt(LIST_INDEX);
        }

        // Get a reference to the ImageView in the fragment layout
        final ImageView imageView = (ImageView) rootView.findViewById(R.id.body_part_image_view);

        // If a list of image ids exists, set the image resource to the correct item in that list
        // Otherwise, create a Log statement that indicates that the list was not found
        if (mImageIds != null) {
            // Set the image resource to the list item at the stored index
            imageView.setImageResource(mImageIds.get(mListIndex));

            imageView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (mListIndex < mImageIds.size() - 1) {
                        mListIndex++;
                    } else {
                        mListIndex = 0;
                    }
                    imageView.setImageResource(mImageIds.get(mListIndex));
                }
            });

        } else {
            Log.v(TAG, "This fragment has a null list of image id's");
        }

        // Return the rootView
        return rootView;
    }

    // Setter methods for keeping track of the list images this fragment can display and which image
    // in the list is currently being displayed

    public void setImageIds(List<Integer> imageIds) {
        mImageIds = imageIds;
    }

    public void setListIndex(int index) {
        mListIndex = index;
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        outState.putIntegerArrayList(IMAGE_ID_LIST, (ArrayList<Integer>) mImageIds);
        outState.putInt(LIST_INDEX, mListIndex);
    }
}