| /* |
| * 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 androidx.work.integration.testapp.imageprocessing; |
| |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapFactory; |
| import android.text.TextUtils; |
| import android.util.Log; |
| import android.view.LayoutInflater; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.widget.ImageView; |
| import android.widget.ProgressBar; |
| import android.widget.TextView; |
| |
| import androidx.recyclerview.widget.RecyclerView; |
| import androidx.work.integration.testapp.R; |
| import androidx.work.integration.testapp.db.Image; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Manages a gallery of {@link Image} entities |
| */ |
| public class ImageRecyclerViewAdapter extends |
| RecyclerView.Adapter<ImageRecyclerViewAdapter.ViewHolder> { |
| private static final String TAG = "ImageAdapter"; |
| private List<Image> mImages = new ArrayList<>(); |
| |
| |
| void updateList(List<Image> images) { |
| mImages = images; |
| notifyDataSetChanged(); |
| } |
| |
| /** |
| * Defines a single gallery item |
| */ |
| static class ViewHolder extends RecyclerView.ViewHolder { |
| private ImageView mImageView; |
| private TextView mTextView; |
| private ProgressBar mProgressBar; |
| private android.os.AsyncTask<Image, Void, Bitmap> mBitmapLoadTask; |
| private boolean mShouldLoad; |
| |
| ViewHolder(View itemView) { |
| super(itemView); |
| mImageView = itemView.findViewById(R.id.image); |
| mTextView = itemView.findViewById(R.id.label); |
| mProgressBar = itemView.findViewById(R.id.progressBar); |
| } |
| |
| @SuppressWarnings("deprecation") /* AsyncTask */ |
| public void load(final Image image) { |
| if (TextUtils.isEmpty(image.mProcessedFilePath)) { |
| mTextView.setText(image.mOriginalAssetName); |
| mProgressBar.setVisibility(View.VISIBLE); |
| mImageView.setVisibility(View.GONE); |
| } else { |
| mBitmapLoadTask = new android.os.AsyncTask<Image, Void, Bitmap>() { |
| @Override |
| protected void onPostExecute(Bitmap bitmap) { |
| if (mShouldLoad) { |
| Log.d(TAG, "Setting image to holder"); |
| mImageView.setImageBitmap(bitmap); |
| mTextView.setText(image.mOriginalAssetName); |
| mProgressBar.setVisibility(View.GONE); |
| mImageView.setVisibility(View.VISIBLE); |
| } else { |
| Log.e(TAG, "Should not load!"); |
| } |
| } |
| |
| @Override |
| protected Bitmap doInBackground(Image... images) { |
| Image image = images[0]; |
| if (image == null) { |
| throw new IllegalArgumentException(); |
| } else if (image.mImage == null) { |
| Log.d(TAG, "Loading image into memory"); |
| image.mImage = BitmapFactory.decodeFile(image.mProcessedFilePath); |
| } |
| return image.mImage; |
| } |
| }; |
| mShouldLoad = true; |
| mBitmapLoadTask.execute(image); |
| } |
| } |
| |
| public void stopLoad() { |
| if (mBitmapLoadTask != null) { |
| Log.d(TAG, "Cancelling load"); |
| mShouldLoad = false; |
| mBitmapLoadTask.cancel(true); |
| mBitmapLoadTask = null; |
| } |
| } |
| } |
| |
| @Override |
| public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { |
| View itemView = LayoutInflater.from(parent.getContext()) |
| .inflate(R.layout.item_processed_image, parent, false); |
| return new ViewHolder(itemView); |
| } |
| |
| @Override |
| public void onBindViewHolder(ViewHolder holder, int position) { |
| holder.load(mImages.get(position)); |
| } |
| |
| @Override |
| public void onViewRecycled(ViewHolder holder) { |
| super.onViewRecycled(holder); |
| holder.stopLoad(); |
| } |
| |
| @Override |
| public int getItemCount() { |
| return mImages.size(); |
| } |
| } |