| /* |
| * 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.android.wallpaper.picker.individual; |
| |
| import android.Manifest.permission; |
| import android.app.Activity; |
| import android.content.Context; |
| import android.content.pm.PackageManager; |
| import android.database.Cursor; |
| import android.net.Uri; |
| import android.os.AsyncTask; |
| import android.provider.MediaStore; |
| import android.view.View; |
| import android.widget.ImageView; |
| |
| import androidx.annotation.Nullable; |
| import androidx.recyclerview.widget.RecyclerView.ViewHolder; |
| |
| import com.android.wallpaper.R; |
| import com.android.wallpaper.asset.Asset; |
| import com.android.wallpaper.asset.ContentUriAsset; |
| import com.android.wallpaper.picker.MyPhotosStarter; |
| |
| /** |
| * ViewHolder for a "my photos" tile presented in an individual category grid. |
| */ |
| public class MyPhotosViewHolder extends ViewHolder implements View.OnClickListener, |
| MyPhotosStarter.PermissionChangedListener { |
| |
| private final Activity mActivity; |
| private final MyPhotosStarter mMyPhotosStarter; |
| private final ImageView mThumbnailView; |
| private final ImageView mOverlayIconView; |
| |
| /* package */ MyPhotosViewHolder(Activity activity, MyPhotosStarter myPhotosStarter, |
| int tileHeightPx, View itemView) { |
| super(itemView); |
| |
| mActivity = activity; |
| mMyPhotosStarter = myPhotosStarter; |
| itemView.getLayoutParams().height = tileHeightPx; |
| |
| itemView.findViewById(R.id.tile).setOnClickListener(this); |
| |
| mThumbnailView = itemView.findViewById(R.id.thumbnail); |
| mOverlayIconView = itemView.findViewById(R.id.overlay_icon); |
| } |
| |
| /** |
| * Fetches a thumbnail asset to represent "my photos" (as the most recently taken photo from the |
| * user's custom photo collection(s)) and calls back to the main thread with the asset. |
| */ |
| private static void fetchThumbnail(final Context context, final AssetListener listener) { |
| if (!isReadExternalStoragePermissionGranted(context)) { |
| // MediaStore.Images.Media.EXTERNAL_CONTENT_URI requires the READ_EXTERNAL_STORAGE permission. |
| listener.onAssetRetrieved(null); |
| } |
| |
| new AsyncTask<Void, Void, Asset>() { |
| @Override |
| protected Asset doInBackground(Void... params) { |
| String[] projection = new String[]{ |
| MediaStore.Images.ImageColumns._ID, |
| MediaStore.Images.ImageColumns.DATE_TAKEN, |
| }; |
| String sortOrder = MediaStore.Images.ImageColumns.DATE_TAKEN + " DESC LIMIT 1"; |
| Cursor cursor = context.getContentResolver().query( |
| MediaStore.Images.Media.EXTERNAL_CONTENT_URI, |
| projection, |
| null /* selection */, |
| null /* selectionArgs */, |
| sortOrder); |
| |
| Asset asset = null; |
| if (cursor != null) { |
| if (cursor.moveToNext()) { |
| asset = new ContentUriAsset(context, Uri.parse( |
| MediaStore.Images.Media.EXTERNAL_CONTENT_URI + "/" + cursor.getString(0))); |
| } |
| cursor.close(); |
| } |
| |
| return asset; |
| } |
| |
| @Override |
| protected void onPostExecute(Asset thumbnail) { |
| listener.onAssetRetrieved(thumbnail); |
| } |
| }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); |
| } |
| |
| /** |
| * Returns whether READ_EXTERNAL_STORAGE has been granted for the application. |
| */ |
| private static boolean isReadExternalStoragePermissionGranted(Context context) { |
| return context.getPackageManager().checkPermission(permission.READ_EXTERNAL_STORAGE, |
| context.getPackageName()) == PackageManager.PERMISSION_GRANTED; |
| } |
| |
| @Override |
| public void onClick(View view) { |
| mMyPhotosStarter.requestCustomPhotoPicker(this); |
| } |
| |
| /** |
| * Draws the overlay icon or last-taken photo as thumbnail for the ViewHolder depending on whether |
| * storage permission has been granted to the app. |
| */ |
| /* package */ void bind() { |
| if (isReadExternalStoragePermissionGranted(mActivity)) { |
| mOverlayIconView.setVisibility(View.GONE); |
| drawThumbnail(); |
| } else { |
| mOverlayIconView.setVisibility(View.VISIBLE); |
| mOverlayIconView.setImageDrawable(mActivity.getDrawable( |
| R.drawable.myphotos_empty_tile_illustration)); |
| } |
| } |
| |
| @Override |
| public void onPermissionsGranted() { |
| bind(); |
| } |
| |
| @Override |
| public void onPermissionsDenied(boolean dontAskAgain) { |
| // No-op |
| } |
| |
| private void drawThumbnail() { |
| fetchThumbnail(mActivity, new AssetListener() { |
| @Override |
| public void onAssetRetrieved(@Nullable Asset thumbnail) { |
| if (thumbnail == null) { |
| return; |
| } |
| |
| thumbnail.loadDrawable(mActivity, mThumbnailView, |
| mActivity.getResources().getColor(R.color.secondary_color)); |
| } |
| }); |
| } |
| |
| private interface AssetListener { |
| /** |
| * Called when the requested Asset is retrieved. |
| */ |
| void onAssetRetrieved(@Nullable Asset asset); |
| } |
| } |