1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.launcher3.util; 18 19 import android.os.FileUtils; 20 import android.util.Log; 21 22 import com.android.launcher3.config.FeatureFlags; 23 24 import java.io.ByteArrayOutputStream; 25 import java.io.Closeable; 26 import java.io.File; 27 import java.io.FileInputStream; 28 import java.io.IOException; 29 import java.io.InputStream; 30 import java.io.OutputStream; 31 32 /** 33 * Supports various IO utility functions 34 */ 35 public class IOUtils { 36 37 private static final int BUF_SIZE = 0x1000; // 4K 38 private static final String TAG = "IOUtils"; 39 toByteArray(File file)40 public static byte[] toByteArray(File file) throws IOException { 41 try (InputStream in = new FileInputStream(file)) { 42 return toByteArray(in); 43 } 44 } 45 toByteArray(InputStream in)46 public static byte[] toByteArray(InputStream in) throws IOException { 47 ByteArrayOutputStream out = new ByteArrayOutputStream(); 48 copy(in, out); 49 return out.toByteArray(); 50 } 51 copy(InputStream from, OutputStream to)52 public static long copy(InputStream from, OutputStream to) throws IOException { 53 return FileUtils.copy(from, to); 54 } 55 closeSilently(Closeable c)56 public static void closeSilently(Closeable c) { 57 if (c != null) { 58 try { 59 c.close(); 60 } catch (IOException e) { 61 if (FeatureFlags.IS_STUDIO_BUILD) { 62 Log.d(TAG, "Error closing", e); 63 } 64 } 65 } 66 } 67 } 68