| /* |
| * Copyright (C) 2021 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.systemui.screenshot; |
| |
| import android.annotation.Nullable; |
| import android.content.ContentResolver; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapFactory; |
| import android.net.Uri; |
| |
| import androidx.concurrent.futures.CallbackToFutureAdapter; |
| |
| import com.google.common.util.concurrent.ListenableFuture; |
| |
| import java.io.BufferedInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| |
| import javax.inject.Inject; |
| |
| /** Loads images. */ |
| public class ImageLoader { |
| private final ContentResolver mResolver; |
| |
| static class Result { |
| @Nullable Uri uri; |
| @Nullable File fileName; |
| @Nullable Bitmap bitmap; |
| |
| @Override |
| public String toString() { |
| final StringBuilder sb = new StringBuilder("Result{"); |
| sb.append("uri=").append(uri); |
| sb.append(", fileName=").append(fileName); |
| sb.append(", bitmap=").append(bitmap); |
| sb.append('}'); |
| return sb.toString(); |
| } |
| } |
| |
| @Inject |
| ImageLoader(ContentResolver resolver) { |
| mResolver = resolver; |
| } |
| |
| /** |
| * Loads an image via URI from ContentResolver. |
| * |
| * @param uri the identifier of the image to load |
| * @return a listenable future result containing a bitmap |
| */ |
| ListenableFuture<Result> load(Uri uri) { |
| return CallbackToFutureAdapter.getFuture(completer -> { |
| Result result = new Result(); |
| try (InputStream in = mResolver.openInputStream(uri)) { |
| result.uri = uri; |
| result.bitmap = BitmapFactory.decodeStream(in); |
| completer.set(result); |
| } |
| catch (IOException e) { |
| completer.setException(e); |
| } |
| return "BitmapFactory#decodeStream"; |
| }); |
| } |
| |
| /** |
| * Loads an image by physical filesystem name. The current user must have filesystem |
| * permissions to read this file/path. |
| * |
| * @param file the system file path of the image to load |
| * @return a listenable future result containing a bitmap |
| */ |
| ListenableFuture<Result> load(File file) { |
| return CallbackToFutureAdapter.getFuture(completer -> { |
| try (InputStream in = new BufferedInputStream(new FileInputStream(file))) { |
| Result result = new Result(); |
| result.fileName = file; |
| result.bitmap = BitmapFactory.decodeStream(in); |
| completer.set(result); |
| } catch (IOException e) { |
| completer.setException(e); |
| } |
| return "BitmapFactory#decodeStream"; |
| }); |
| } |
| } |