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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.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;
import com.android.wallpaper.util.ResourceUtils;
/**
* 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,
ResourceUtils.getColorAttr(mActivity, android.R.attr.colorSecondary));
}
});
}
private interface AssetListener {
/**
* Called when the requested Asset is retrieved.
*/
void onAssetRetrieved(@Nullable Asset asset);
}
}
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