1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14 15 package android.support.v17.leanback.supportleanbackshowcase.utils; 16 17 import android.content.ContentResolver; 18 import android.content.Context; 19 import android.net.Uri; 20 21 import java.io.IOException; 22 import java.io.InputStream; 23 24 /** 25 * A collection of utility methods, all static. 26 */ 27 public class Utils { 28 29 public static int convertDpToPixel(Context ctx, int dp) { 30 float density = ctx.getResources().getDisplayMetrics().density; 31 return Math.round((float) dp * density); 32 } 33 34 /** 35 * Will read the content from a given {@link InputStream} and return it as a {@link String}. 36 * 37 * @param inputStream The {@link InputStream} which should be read. 38 * @return Returns <code>null</code> if the the {@link InputStream} could not be read. Else 39 * returns the content of the {@link InputStream} as {@link String}. 40 */ 41 public static String inputStreamToString(InputStream inputStream) { 42 try { 43 byte[] bytes = new byte[inputStream.available()]; 44 inputStream.read(bytes, 0, bytes.length); 45 String json = new String(bytes); 46 return json; 47 } catch (IOException e) { 48 return null; 49 } 50 } 51 52 public static Uri getResourceUri(Context context, int resID) { 53 return Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE + "://" + 54 context.getResources().getResourcePackageName(resID) + '/' + 55 context.getResources().getResourceTypeName(resID) + '/' + 56 context.getResources().getResourceEntryName(resID)); 57 } 58 } 59
