Java tutorial
/* * Copyright 2013 - learnNcode (learnncode@gmail.com) * * 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.nicolls.ablum.fragment; import java.io.File; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.support.v4.app.Fragment; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.provider.MediaStore; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.AdapterView.OnItemLongClickListener; import android.widget.GridView; import android.widget.Toast; import com.nicolls.ablum.MediaChooserConstants; import com.nicolls.ablum.MediaModel; import com.nicolls.ablum.R; import com.nicolls.ablum.adapter.GridViewAdapter; public class ImageFragment extends Fragment { private ArrayList<String> mSelectedItems = new ArrayList<String>(); private ArrayList<MediaModel> mGalleryModelList; private GridView mImageGridView; private View mView; private OnImageSelectedListener mCallback; private GridViewAdapter mImageAdapter; private Cursor mImageCursor; private ArrayList<String> pathList; // Container Activity must implement this interface public interface OnImageSelectedListener { public void onImageSelected(int count); } @Override public void onAttach(Activity activity) { super.onAttach(activity); // This makes sure that the container activity has implemented // the callback interface. If not, it throws an exception try { mCallback = (OnImageSelectedListener) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement OnImageSelectedListener"); } } public ImageFragment() { setRetainInstance(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if (mView == null) { mView = inflater.inflate(R.layout.view_grid_layout_media_chooser, container, false); mImageGridView = (GridView) mView.findViewById(R.id.gridViewFromMediaChooser); if (getArguments() != null) { pathList = getArguments().getStringArrayList("pathList"); initPhoneImages(getArguments().getString("name")); } else { initPhoneImages(); } if (pathList == null) { pathList = new ArrayList<>(); } } else { ((ViewGroup) mView.getParent()).removeView(mView); if (mImageAdapter == null || mImageAdapter.getCount() == 0) { Toast.makeText(getActivity(), getActivity().getString(R.string.no_media_file_available), Toast.LENGTH_SHORT).show(); } } return mView; } private void initPhoneImages(String bucketName) { try { final String orderBy = MediaStore.Images.Media.DATE_TAKEN; String searchParams = null; String bucket = bucketName; searchParams = "bucket_display_name = \"" + bucket + "\""; final String[] columns = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID }; mImageCursor = getActivity().getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, searchParams, null, orderBy + " DESC"); setAdapter(mImageCursor); } catch (Exception e) { e.printStackTrace(); } } private void initPhoneImages() { try { final String orderBy = MediaStore.Images.Media.DATE_TAKEN; final String[] columns = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID }; mImageCursor = getActivity().getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null, null, orderBy + " DESC"); setAdapter(mImageCursor); } catch (Exception e) { e.printStackTrace(); } } private void setAdapter(Cursor imagecursor) { // Toast.makeText(getActivity(),pathList.size()+"###",Toast.LENGTH_SHORT).show(); if (imagecursor.getCount() > 0) { mGalleryModelList = new ArrayList<MediaModel>(); for (int i = 0; i < imagecursor.getCount(); i++) { imagecursor.moveToPosition(i); int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA); MediaModel galleryModel = new MediaModel(imagecursor.getString(dataColumnIndex).toString(), false); for (String path : pathList) { if (TextUtils.equals(path, galleryModel.url)) { galleryModel.status = true; mSelectedItems.add(galleryModel.url.toString()); break; } } mGalleryModelList.add(galleryModel); } mImageAdapter = new GridViewAdapter(getActivity(), 0, mGalleryModelList, false); mImageGridView.setAdapter(mImageAdapter); } else { Toast.makeText(getActivity(), getActivity().getString(R.string.no_media_file_available), Toast.LENGTH_SHORT).show(); } mImageGridView.setOnItemLongClickListener(new OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { GridViewAdapter adapter = (GridViewAdapter) parent.getAdapter(); MediaModel galleryModel = (MediaModel) adapter.getItem(position); File file = new File(galleryModel.url); Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(file), "image/*"); startActivity(intent); return true; } }); mImageGridView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { // update the mStatus of each category in the adapter GridViewAdapter adapter = (GridViewAdapter) parent.getAdapter(); MediaModel galleryModel = (MediaModel) adapter.getItem(position); if (!galleryModel.status) { long size = MediaChooserConstants.ChekcMediaFileSize(new File(galleryModel.url.toString()), false); if (size != 0) { Toast.makeText(getActivity(), getActivity().getResources().getString(R.string.file_size_exeeded) + " " + MediaChooserConstants.SELECTED_IMAGE_SIZE_IN_MB + " " + getActivity().getResources().getString(R.string.mb), Toast.LENGTH_SHORT).show(); return; } if ((MediaChooserConstants.MAX_MEDIA_LIMIT == MediaChooserConstants.SELECTED_MEDIA_COUNT)) { if (MediaChooserConstants.SELECTED_MEDIA_COUNT < 2) { Toast.makeText(getActivity(), getActivity().getResources().getString(R.string.max_limit_file) + " " + MediaChooserConstants.SELECTED_MEDIA_COUNT + " " + getActivity().getResources().getString(R.string.file), Toast.LENGTH_SHORT).show(); return; } else { Toast.makeText(getActivity(), getActivity().getResources().getString(R.string.max_limit_file) + " " + MediaChooserConstants.SELECTED_MEDIA_COUNT + " " + getActivity().getResources().getString(R.string.files), Toast.LENGTH_SHORT).show(); return; } } } // inverse the status galleryModel.status = !galleryModel.status; adapter.notifyDataSetChanged(); if (galleryModel.status) { mSelectedItems.add(galleryModel.url.toString()); MediaChooserConstants.SELECTED_MEDIA_COUNT++; } else { mSelectedItems.remove(galleryModel.url.toString().trim()); MediaChooserConstants.SELECTED_MEDIA_COUNT--; } if (mCallback != null) { mCallback.onImageSelected(mSelectedItems.size()); Intent intent = new Intent(); intent.putStringArrayListExtra("list", mSelectedItems); getActivity().setResult(Activity.RESULT_OK, intent); } } }); } public ArrayList<String> getSelectedImageList() { return mSelectedItems; } public void addItem(String item) { if (mImageAdapter != null) { MediaModel model = new MediaModel(item, false); mGalleryModelList.add(0, model); mImageAdapter.notifyDataSetChanged(); } else { initPhoneImages(); } } }