1 /* 2 * Copyright (C) 2010 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.email; 18 19 import android.content.Context; 20 import android.content.res.Resources; 21 import android.content.res.TypedArray; 22 import android.graphics.Paint; 23 24 /** 25 * Helper class to load resources. 26 */ 27 public class ResourceHelper { 28 public final static int UNDEFINED_RESOURCE_ID = -1; 29 30 private static ResourceHelper sInstance; 31 private final Context mContext; 32 private final Resources mResources; 33 34 private final int[] mAccountColors; 35 private final Paint[] mAccountColorPaints; 36 private final TypedArray mAccountColorArray; 37 38 private ResourceHelper(Context context) { 39 mContext = context.getApplicationContext(); 40 mResources = mContext.getResources(); 41 42 mAccountColorArray = mResources.obtainTypedArray(R.array.combined_view_account_colors); 43 mAccountColors = mResources.getIntArray(R.array.combined_view_account_colors); 44 mAccountColorPaints = new Paint[mAccountColors.length]; 45 for (int i = 0; i < mAccountColors.length; i++) { 46 Paint p = new Paint(); 47 p.setColor(mAccountColors[i]); 48 mAccountColorPaints[i] = p; 49 } 50 } 51 52 public static synchronized ResourceHelper getInstance(Context context) { 53 if (sInstance == null) { 54 sInstance = new ResourceHelper(context); 55 } 56 return sInstance; 57 } 58 59 /* package */ int getAccountColorIndex(long accountId) { 60 // The account ID is 1-based, so -1. 61 // Use abs so that it'd work for -1 as well. 62 return Math.abs((int) ((accountId - 1) % mAccountColors.length)); 63 } 64 65 /** 66 * @return color for an account. 67 */ 68 public int getAccountColor(long accountId) { 69 return mAccountColors[getAccountColorIndex(accountId)]; 70 } 71 72 /** 73 * @return The resource ID for an account color. 74 * Otherwise, {@value #UNDEFINED_RESOURCE_ID} if color was not specified via ID. 75 */ 76 public int getAccountColorId(long accountId) { 77 return mAccountColorArray.getResourceId(getAccountColorIndex(accountId), 78 UNDEFINED_RESOURCE_ID); 79 } 80 81 /** 82 * @return {@link Paint} equivalent to {@link #getAccountColor}. 83 */ 84 public Paint getAccountColorPaint(long accountId) { 85 return mAccountColorPaints[getAccountColorIndex(accountId)]; 86 } 87 } 88
